/*! tailwindcss v4.2.4 | MIT License | https://tailwindcss.com */
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-ordinal:initial;--tw-slashed-zero:initial;--tw-numeric-figure:initial;--tw-numeric-spacing:initial;--tw-numeric-fraction:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial;--tw-backdrop-blur:initial;--tw-backdrop-brightness:initial;--tw-backdrop-contrast:initial;--tw-backdrop-grayscale:initial;--tw-backdrop-hue-rotate:initial;--tw-backdrop-invert:initial;--tw-backdrop-opacity:initial;--tw-backdrop-saturate:initial;--tw-backdrop-sepia:initial;--tw-ease:initial}::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-ordinal:initial;--tw-slashed-zero:initial;--tw-numeric-figure:initial;--tw-numeric-spacing:initial;--tw-numeric-fraction:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial;--tw-backdrop-blur:initial;--tw-backdrop-brightness:initial;--tw-backdrop-contrast:initial;--tw-backdrop-grayscale:initial;--tw-backdrop-hue-rotate:initial;--tw-backdrop-invert:initial;--tw-backdrop-opacity:initial;--tw-backdrop-saturate:initial;--tw-backdrop-sepia:initial;--tw-ease:initial}}}@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--text-sm:.875rem;--text-sm--line-height:calc(1.25 / .875);--radius-sm:.25rem;--radius-md:.375rem;--radius-lg:.5rem;--radius-xl:.75rem;--ease-out:cubic-bezier(0, 0, .2, 1);--ease-in-out:cubic-bezier(.4, 0, .2, 1);--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){-webkit-appearance:button;appearance:button}::file-selector-button{-webkit-appearance:button;appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components{.z-work-card{border:1px solid var(--z-border);border-radius:var(--z-radius-card);background:var(--z-white);box-shadow:var(--z-shadow-card);padding:20px}.z-eyebrow{color:var(--z-muted);letter-spacing:.08em;text-transform:uppercase;font-size:12px;font-weight:800}.z-button-primary,.z-button-secondary,.z-language-switch{border-radius:var(--z-radius-control);justify-content:center;align-items:center;min-height:40px;padding:0 16px;font-weight:700;transition:transform .14s,border-color .14s,background .14s,color .14s,opacity .14s;display:inline-flex}.z-button-primary{border:1px solid var(--z-rail);background:var(--z-rail);color:var(--z-white)}.z-button-secondary,.z-language-switch{border:1px solid var(--z-border-strong);background:var(--z-soft);color:var(--z-ink)}.z-button-primary:hover,.z-button-secondary:hover,.z-language-switch:hover{transform:translateY(-1px)}.z-button-primary:disabled,.z-button-secondary:disabled{cursor:not-allowed;opacity:.48;transform:none}.z-icon-button{border:1px solid var(--z-border);background:var(--z-soft);block-size:42px;inline-size:42px;color:var(--z-ink);border-radius:999px;flex:none;justify-content:center;align-items:center;font-size:22px;font-weight:800;line-height:1;transition:border-color .14s,background .14s,transform .14s;display:inline-flex}.z-icon-button:hover{border-color:var(--z-border-strong);background:var(--z-white);transform:translateY(-1px)}.z-toast-stack{z-index:210;pointer-events:none;gap:10px;width:min(420px,100vw - 32px);display:grid;position:fixed;inset-block-start:24px;inset-inline-end:24px}.z-toast{border:1px solid var(--z-border-strong);border-radius:var(--z-radius-card);background:var(--z-white);grid-template-columns:minmax(0,1fr) 34px;align-items:start;gap:0 12px;display:grid}@supports (color:color-mix(in lab, red, red)){.z-toast{background:color-mix(in srgb, var(--z-white) 94%, var(--z-panel))}}.z-toast{color:var(--z-ink);box-shadow:var(--z-shadow-card);pointer-events:auto;padding:14px}.z-toast.warning{background:var(--z-success-bg);border-color:#2d525352}@supports (color:color-mix(in lab, red, red)){.z-toast.warning{background:color-mix(in srgb, var(--z-success-bg) 54%, var(--z-white))}}.z-toast.danger{background:#f4eaea;border-color:#6026263d}@supports (color:color-mix(in lab, red, red)){.z-toast.danger{background:color-mix(in srgb, #f4eaea 48%, var(--z-white))}}.z-toast strong{color:var(--z-ink);font-size:14px;font-weight:950;line-height:1.4;display:block}.z-toast-summary{text-align:start;background:0 0;border:0;width:100%;min-width:0;padding:0;display:block}.z-toast-summary:focus-visible{outline:2px solid var(--z-console-accent-border,var(--z-border-strong));outline-offset:2px}.z-toast-body{grid-column:1}.z-toast p{color:var(--z-ink);margin:5px 0 0}@supports (color:color-mix(in lab, red, red)){.z-toast p{color:color-mix(in srgb, var(--z-ink) 74%, var(--z-muted))}}.z-toast p{font-size:13px;font-weight:650;line-height:1.65}.z-toast-close{border:1px solid var(--z-border);border-radius:var(--z-radius-control);background:var(--z-soft);width:34px;height:34px;color:var(--z-muted);justify-content:center;align-items:center;font-size:18px;line-height:1;display:inline-flex}.z-chat-app .z-toast{border-color:var(--z-console-border);background:var(--z-console-panel);color:var(--z-console-text);box-shadow:0 18px 42px #0000005c}.z-chat-app .z-toast.warning{border-color:var(--z-console-accent-border);background:var(--z-console-accent-soft)}@supports (color:color-mix(in lab, red, red)){.z-chat-app .z-toast.warning{background:color-mix(in srgb, var(--z-console-accent-soft) 30%, var(--z-console-panel))}}.z-chat-app .z-toast.danger{border-color:var(--z-console-danger-border);background:var(--z-console-danger-soft)}@supports (color:color-mix(in lab, red, red)){.z-chat-app .z-toast.danger{background:color-mix(in srgb, var(--z-console-danger-soft) 42%, var(--z-console-panel))}}.z-chat-app .z-toast strong{color:var(--z-console-text)}.z-chat-app .z-toast p{color:var(--z-console-muted)}.z-chat-app .z-toast-close{border-color:var(--z-console-border);background:var(--z-console-panel-raised);color:var(--z-console-muted)}.z-chat-app .z-toast-action{border-color:var(--z-console-accent-border);background:var(--z-console-accent);color:var(--z-console-accent-on)}@media (max-width:680px){.z-chat-app .z-toast-stack{width:auto;gap:8px;inset-block-start:auto;inset-block-end:calc(12px + env(safe-area-inset-bottom,0px));inset-inline:12px}.z-chat-app .z-toast{border-color:var(--z-console-border);background:var(--z-console-panel);color:var(--z-console-text);border-radius:16px;grid-template-columns:minmax(0,1fr) 32px;padding:10px;box-shadow:0 14px 34px #00000057}.z-chat-app .z-toast.warning,.z-chat-app .z-toast.danger{border-color:var(--z-console-accent-border);background:var(--z-console-panel)}.z-chat-app .z-toast-summary strong{color:var(--z-console-text);text-overflow:ellipsis;white-space:nowrap;font-size:13px;line-height:32px;overflow:hidden}.z-chat-app .z-toast-body{display:none}.z-chat-app .z-toast.expanded .z-toast-body,.z-chat-app .z-toast.has-action .z-toast-body{display:block}.z-chat-app .z-toast p{color:var(--z-console-muted);font-size:12px;line-height:1.5}.z-chat-app .z-toast-close{border-color:var(--z-console-border);background:var(--z-console-panel-raised);width:32px;height:32px;color:var(--z-console-muted);border-radius:12px}.z-chat-app .z-toast-action{border-color:var(--z-console-accent-border);background:var(--z-console-accent);min-height:32px;color:var(--z-console-accent-on)}}.z-toast-action{border:1px solid var(--z-rail);border-radius:var(--z-radius-control);background:var(--z-rail);min-height:34px;color:var(--z-white);justify-content:center;align-items:center;margin-top:10px;padding:0 12px;font-size:12px;font-weight:900;text-decoration:none;display:inline-flex}.z-site{background:var(--z-bg);min-height:100vh;color:var(--z-body)}.z-site-header{background:var(--z-rail);min-height:76px;color:var(--z-white);border-bottom:1px solid #ffffff1f;justify-content:space-between;align-items:center;gap:20px;padding:0 clamp(20px,5vw,72px);display:flex}.z-site-brand{color:var(--z-white);align-items:center;gap:10px;font-size:20px;font-weight:900;display:inline-flex}.z-site-brand svg{width:20px;height:20px;color:var(--z-white)}.z-site-header nav{align-items:center;gap:10px;display:flex}.z-site-header nav>a,.z-site-header .z-language-switch{color:#ffffffdb;background:0 0;border:1px solid #ffffff2e;border-radius:999px;justify-content:center;align-items:center;min-height:38px;padding:0 14px;font-size:13px;font-weight:800;display:inline-flex}.z-site-header nav>a:hover,.z-site-header .z-language-switch:hover{color:var(--z-white);border-color:#ffffff61}.z-auth-page{background:var(--z-bg);min-height:100vh;color:var(--z-body)}.z-auth-shell{grid-template-columns:minmax(0,1fr) minmax(320px,430px);align-items:center;gap:clamp(28px,6vw,80px);min-height:calc(100vh - 76px);padding:clamp(42px,8vw,96px) clamp(20px,7vw,104px);display:grid}.z-auth-copy{max-width:760px}.z-auth-copy h1{color:var(--z-ink);letter-spacing:0;margin:14px 0 0;font-size:clamp(42px,7vw,86px);line-height:.96}.z-auth-copy p:last-child{max-width:620px;color:var(--z-body);margin:24px 0 0;font-size:18px;line-height:1.75}.z-auth-google{justify-content:center;align-items:center;gap:10px;margin-top:18px;display:inline-flex;border-color:var(--z-border-strong)!important;background:var(--z-white)!important;color:var(--z-ink)!important}.z-google-logo{flex:none;width:18px;height:18px}.z-auth-divider{color:var(--z-muted);align-items:center;gap:10px;margin:18px 0;font-size:12px;font-weight:800;display:flex}.z-auth-divider:before,.z-auth-divider:after{background:var(--z-border);content:"";flex:1;height:1px}.z-auth-alt{margin-top:16px!important}.z-auth-alt a{color:var(--z-ink);font-weight:900}.z-auth-callback{text-align:center;place-content:center;min-height:100vh;padding:24px;display:grid}.z-auth-callback h1{color:var(--z-ink);margin:12px 0 0;font-size:clamp(28px,5vw,54px)}.z-site-auth{border:1px solid var(--z-border-strong);border-radius:var(--z-radius-panel);background:var(--z-white);box-shadow:var(--z-shadow-card);padding:26px}.z-site-auth h2{color:var(--z-ink);margin:0;font-size:25px}.z-site-auth label{color:var(--z-ink);font-size:13px;font-weight:800;display:block}.z-site-auth label:not(:first-of-type){margin-top:14px}.z-site-auth input{border:1px solid var(--z-border-strong);border-radius:var(--z-radius-control);background:var(--z-white);width:100%;min-height:48px;color:var(--z-body);outline:0;margin-top:9px;padding:0 14px;font-size:16px}.z-site-auth input:focus{border-color:#070707b8;box-shadow:0 0 0 4px #07070714}.z-site-auth button:not(.z-site-auth-switch){border:1px solid var(--z-rail);border-radius:var(--z-radius-control);background:var(--z-rail);width:100%;min-height:48px;color:var(--z-white);margin-top:14px;font-weight:900}.z-site-auth button:not(.z-site-auth-switch):disabled{cursor:not-allowed;opacity:.56}.z-site-auth p{color:var(--z-muted);margin:12px 0 0;font-size:13px;line-height:1.6}.z-turnstile-field{justify-content:center;height:0;display:flex;overflow:hidden}.z-turnstile-field[data-interactive]{height:auto;margin-top:4px;overflow:visible}.z-pricing-hero{max-width:980px;padding:clamp(46px,7vw,90px) clamp(20px,7vw,104px) 28px}.z-pricing-hero h1{max-width:820px;color:var(--z-ink);letter-spacing:0;margin:14px 0 0;font-size:clamp(42px,7vw,82px);line-height:.98}.z-pricing-hero>p:last-child{max-width:720px;color:var(--z-body);margin:22px 0 0;font-size:18px;line-height:1.75}.z-pricing-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;padding:16px clamp(20px,7vw,104px) clamp(48px,7vw,86px);display:grid}.z-pricing-card{border:1px solid var(--z-border);border-radius:var(--z-radius-card);background:var(--z-white);min-height:600px;box-shadow:var(--z-shadow-card);grid-template-rows:auto auto 1fr auto;align-content:start;gap:20px;padding:24px;display:grid}.z-pricing-card-active{border-color:var(--z-border-strong);background:var(--z-white)}@supports (color:color-mix(in lab, red, red)){.z-pricing-card-active{background:color-mix(in srgb, var(--z-white) 86%, var(--z-panel))}}.z-pricing-card h2{color:var(--z-ink);margin:0;font-size:24px}.z-pricing-price{color:var(--z-ink);margin:18px 0 0;font-size:32px;font-weight:900}.z-pricing-copy{color:var(--z-muted);margin:14px 0 0;font-size:15px;line-height:1.75}.z-pricing-card ul{gap:10px;margin:0;padding:0;list-style:none;display:grid}.z-pricing-card li{border-top:1px solid var(--z-border);color:var(--z-body);padding-top:10px;font-size:14px;line-height:1.6}.z-pricing-card>.z-button-secondary,.z-pricing-card>.z-billing-checkout,.z-pricing-card>.z-contact-sales{align-self:end}.z-contact-sales{margin-top:6px;display:grid}.z-contact-sales>.z-button-primary{width:100%}.z-contact-sales-overlay{z-index:70;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0707078a;place-items:center;padding:18px;display:grid;position:fixed;inset:0}.z-contact-sales-sheet{border:1px solid var(--z-border);border-radius:var(--z-radius-panel);background:var(--z-white);gap:18px;width:min(720px,100%);max-height:calc(100vh - 36px);padding:24px;display:grid;overflow:auto;box-shadow:0 30px 90px #07070757}.z-contact-sales-head{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.z-contact-sales-sheet h2{color:var(--z-ink);margin:0 0 8px;font-size:clamp(1.4rem,2vw,2rem)}.z-contact-sales-sheet p{color:var(--z-muted);margin:0}.z-contact-sales-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.z-contact-sales-grid label{color:var(--z-muted);gap:7px;font-size:.8rem;display:grid}.z-contact-sales-grid label:last-child{grid-column:1/-1}.z-contact-sales-grid input,.z-contact-sales-grid textarea{background:var(--z-soft);border:1px solid var(--z-border);color:var(--z-ink);font:inherit;resize:vertical;border-radius:16px;padding:12px 14px}.z-honeypot{opacity:0;pointer-events:none;block-size:0;inline-size:0;position:absolute}.z-billing-checkout{gap:12px;margin-top:6px;display:grid}.z-billing-checkout .z-button-primary{width:100%}.z-billing-note{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-soft);color:var(--z-muted);padding:12px;font-size:13px;line-height:1.7}.z-billing-form{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-soft);padding:14px}.z-billing-checkout-overlay{z-index:80;background:var(--z-ink);place-items:center;display:grid;position:fixed;inset:0}@supports (color:color-mix(in lab, red, red)){.z-billing-checkout-overlay{background:color-mix(in srgb, var(--z-ink) 42%, transparent)}}.z-billing-checkout-overlay{padding:18px}.z-billing-checkout-sheet{border:1px solid var(--z-border);border-radius:var(--z-radius-panel);background:var(--z-surface);width:min(100%,720px);max-height:min(760px,100vh - 36px);box-shadow:var(--z-shadow);gap:18px;padding:clamp(18px,3vw,28px);display:grid;overflow:auto}.z-billing-checkout-head{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.z-billing-checkout-head h2{color:var(--z-ink);letter-spacing:0;margin:0;font-size:clamp(28px,4vw,44px);line-height:1}.z-billing-checkout-head p{max-width:58ch;color:var(--z-muted);margin:10px 0 0;font-size:14px;line-height:1.7}.z-billing-checkout-sheet .z-billing-form{background:var(--z-surface);padding:0}.z-billing-form h3{color:var(--z-ink);margin:0 0 12px;font-size:15px}.z-billing-form p{color:var(--z-muted);margin:12px 0 0;font-size:12px;line-height:1.6}.z-billing-callback{place-items:center;min-height:calc(100vh - 76px);padding:24px;display:grid}.z-billing-callback .z-work-card{width:min(100%,680px)}.z-billing-callback h1{color:var(--z-ink);margin:14px 0 0;font-size:clamp(34px,6vw,64px);line-height:1}.z-billing-callback .z-work-card>p:not(.z-eyebrow):not(.z-billing-note){color:var(--z-body);margin:18px 0 0;font-size:17px;line-height:1.75}@media (max-width:1180px){.z-pricing-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.z-chat-app{background:var(--z-bg);height:100dvh;min-height:0;max-height:100dvh;color:var(--z-body);padding:0;overflow:hidden}.z-chat-frame{background:var(--z-panel);width:100%;height:100%;min-height:0;max-height:100%;box-shadow:none;border:0;border-radius:0;grid-template-columns:64px minmax(220px,280px) minmax(0,1fr);display:grid;overflow:hidden}.z-chat-icon-button{border:0;justify-content:center;align-items:center;display:inline-flex}.z-chat-kicker{color:var(--z-muted);letter-spacing:.08em;text-transform:uppercase;margin:0;font-size:11px;font-weight:800}.z-chat-icon-button{background:var(--z-soft);border-radius:14px;flex:none;width:38px;height:38px}@supports (color:color-mix(in lab, red, red)){.z-chat-icon-button{background:color-mix(in srgb, var(--z-soft) 76%, white)}}.z-chat-icon-button{color:var(--z-muted);transition:background .14s,color .14s,transform .14s}.z-chat-icon-button:hover{background:var(--z-white);color:var(--z-ink);transform:translateY(-1px)}.z-chat-icon-button svg{width:17px;height:17px}.z-chat-main{background:var(--z-soft);grid-template-rows:auto minmax(0,1fr) auto auto;min-width:0;min-height:0;display:grid;overflow:hidden}.z-chat-thread{flex-direction:column;gap:22px;min-height:0;padding:34px clamp(22px,5vw,68px) 18px;display:flex;overflow-y:auto}.z-chat-message{flex-direction:column;gap:7px;width:min(720px,100%);display:flex}.z-chat-message.user{align-self:flex-end;align-items:flex-end}.z-chat-message.assistant{align-self:flex-start;align-items:flex-start}.z-chat-bubble{border:1px solid var(--z-border);border-radius:var(--z-radius-card);background:var(--z-white);box-shadow:var(--z-shadow-card);padding:16px 19px}.z-chat-bubble p{color:var(--z-body);margin:0;font-size:15px;line-height:1.78}.z-chat-message.user .z-chat-bubble{border-color:var(--z-ink);background:var(--z-ink);border-end-end-radius:9px}.z-chat-message.user .z-chat-bubble p{color:#ffffffe6}.z-chat-message.user .z-markdown-response{color:#ffffffe6;font-size:15px;line-height:1.78}.z-chat-message.user .z-markdown-response p,.z-chat-message.user .z-markdown-response li,.z-chat-message.user .z-markdown-response h1,.z-chat-message.user .z-markdown-response h2,.z-chat-message.user .z-markdown-response h3,.z-chat-message.user .z-markdown-response h4,.z-chat-message.user .z-markdown-response h5,.z-chat-message.user .z-markdown-response h6,.z-chat-message.user .z-markdown-response strong,.z-chat-message.user .z-markdown-response em,.z-chat-message.user .z-markdown-response span{color:#ffffffe6}.z-chat-message.user .z-markdown-response blockquote,.z-chat-message.user .z-markdown-response small,.z-chat-message.user .z-markdown-response figcaption{color:#ffffffb8}.z-chat-message.user .z-markdown-response a{color:#fffffff5}.z-chat-message.user .z-markdown-response code,.z-chat-message.user .z-markdown-response pre{color:#ffffffeb;background:#ffffff14;border-color:#ffffff2e}.z-chat-message.user .z-markdown-response ul,.z-chat-message.user .z-markdown-response ol{gap:6px;padding-inline-start:22px;display:grid}.z-chat-message.assistant .z-chat-bubble{box-shadow:none;background:0 0;border:0;border-radius:0;padding:0 5px}.z-chat-message.assistant .z-chat-bubble p{color:var(--z-ink);font-size:16px;line-height:1.85}.z-chat-message.thinking{width:min(520px,100%)}.z-chat-message.assistant .z-chat-bubble.z-ai-thinking{color:var(--z-muted);align-items:center;gap:8px;font-size:13px;font-weight:780;line-height:1.6;display:flex}.z-ai-thinking-dots{align-items:center;gap:4px;display:inline-flex}.z-ai-thinking-dots i{background:var(--z-muted);border-radius:999px;width:6px;height:6px;animation:1.15s ease-in-out infinite z-thinking-dot}.z-ai-thinking-dots i:nth-child(2){animation-delay:.14s}.z-ai-thinking-dots i:nth-child(3){animation-delay:.28s}@keyframes z-thinking-dot{0%,80%,to{opacity:.38;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}.z-see-more{border:1px solid var(--z-border);background:var(--z-soft);width:fit-content;min-height:32px;color:var(--z-ink);border-radius:999px;justify-content:center;align-items:center;gap:6px;padding:0 11px;font-size:12px;font-weight:850;display:inline-flex}.z-see-more svg{width:14px;height:14px;transition:transform .14s}.z-markdown-response{color:var(--z-ink);gap:12px;font-size:16px;line-height:1.85;display:grid}.z-markdown-response h1,.z-markdown-response h2,.z-markdown-response h3,.z-markdown-response h4,.z-markdown-response h5,.z-markdown-response h6,.z-markdown-response p,.z-markdown-response ul,.z-markdown-response ol,.z-markdown-response blockquote,.z-markdown-response pre,.z-markdown-response table{margin:0}.z-markdown-response h1,.z-markdown-response h2{font-size:20px;line-height:1.35}.z-markdown-response h3,.z-markdown-response h4,.z-markdown-response h5,.z-markdown-response h6{font-size:17px;line-height:1.45}.z-markdown-response ul,.z-markdown-response ol{gap:6px;padding-inline-start:22px;display:grid}.z-markdown-response blockquote{border-inline-start:3px solid var(--z-border-strong);color:var(--z-body);padding-inline-start:12px}.z-markdown-response code{border:1px solid var(--z-border);background:var(--z-soft);border-radius:8px;padding:1px 5px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;font-size:.9em}.z-markdown-response pre{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-ink);color:var(--z-white);padding:12px;overflow-x:auto}.z-markdown-response pre code{color:inherit;background:0 0;border:0;padding:0}.z-markdown-response a{color:var(--z-success);text-underline-offset:3px;font-weight:800;text-decoration:underline}.z-markdown-response hr{background:var(--z-border);border:0;width:100%;height:1px}.z-markdown-response input[type=checkbox]{width:15px;height:15px;accent-color:var(--z-success);transform:translateY(2px)}.z-markdown-table-wrap{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-white);overflow-x:auto}.z-markdown-response table{border-collapse:collapse;width:100%;min-width:520px;font-size:14px;line-height:1.55}.z-markdown-response th,.z-markdown-response td{border-bottom:1px solid var(--z-border);text-align:start;vertical-align:top;padding:10px 12px}.z-markdown-response th{background:var(--z-soft);color:var(--z-ink);font-weight:850}.z-markdown-response tr:last-child td{border-bottom:0}.z-markdown-response .katex-display{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-soft);padding:14px 16px;overflow-x:auto}.z-chat-composer-wrap{padding:14px clamp(22px,5vw,68px) 18px;position:relative}.z-chat-composer{border:1px solid var(--z-border-strong);background:var(--z-white);box-shadow:var(--z-shadow-composer);border-radius:24px;gap:12px;padding:14px;display:grid}.z-chat-composer textarea{z-index:2;resize:vertical;width:100%;min-height:74px;max-height:160px;color:var(--z-body);font:inherit;background:0 0;border:0;outline:0;font-size:15px;line-height:1.7;position:relative}.z-chat-composer textarea::placeholder{color:var(--z-muted)}.z-chat-composer-upload.disabled,.z-chat-composer textarea:disabled{cursor:not-allowed;opacity:.52}.z-chat-composer-upload{border:1px solid var(--z-border);background:var(--z-white);width:34px;min-height:34px;color:var(--z-ink);cursor:pointer;border-radius:12px;justify-content:center;align-items:center;transition:background .14s,border-color .14s,transform .14s;display:inline-flex}.z-chat-composer-upload:not(.disabled):hover{border-color:var(--z-border-strong);background:var(--z-soft);transform:translateY(-1px)}.z-chat-v2-page{flex-direction:column;grid-row:1/-1;min-width:0;height:100%;min-height:0;display:flex;overflow:hidden}.z-chat-v2{min-block-size:0;flex-direction:column;flex:auto;min-height:0;display:flex;overflow:hidden}.z-chat-v2>.z-chat-thread{overscroll-behavior:contain;flex:auto;min-height:0;padding-block-start:clamp(22px,4vh,44px);overflow-y:auto}.z-chat-v2>.z-chat-thread.empty{justify-content:center;align-items:center;padding:clamp(36px,8vh,96px) clamp(22px,5vw,68px);display:flex}.z-chat-v2>.z-chat-composer-wrap{flex:none;padding:12px clamp(22px,5vw,68px) 18px}.z-chat-v2-body-status{width:fit-content;max-width:min(720px,100% - 44px);min-height:18px;color:var(--z-muted);text-overflow:ellipsis;white-space:nowrap;opacity:.86;background:0 0;border:0;border-radius:0;align-items:center;gap:9px;margin:12px clamp(22px,5vw,68px) 0;padding:0;font-size:12px;font-weight:760;display:inline-flex;overflow:hidden}.z-chat-v2-body-status i{background:#f2f0ec;border-radius:999px;flex:none;width:8px;height:8px;animation:1.15s ease-in-out infinite z-thinking-dot;box-shadow:0 0 0 3px #f2f0ec1f,0 0 14px #f2f0ec6b}.z-chat-v2-composer{gap:10px}.z-chat-v2-composer-head{justify-content:flex-end;align-items:flex-start;min-height:38px;display:flex}.z-chat-v2-input{resize:vertical;width:100%;min-height:74px;max-height:160px;color:var(--z-body);font:inherit;background:0 0;border:0;outline:0;font-size:15px;line-height:1.7}.z-chat-v2-status{color:var(--z-muted);align-items:center;gap:8px;margin-bottom:10px;font-size:12px;font-weight:850;display:inline-flex}.z-chat-v2-status i{background:var(--z-success);width:8px;height:8px;box-shadow:0 0 0 4px var(--z-console-accent-soft);border-radius:999px;display:inline-block}.z-chat-v2-actions{justify-content:flex-end;align-items:center;gap:8px;display:flex}.z-chat-v2-footer{justify-content:space-between;align-items:center;gap:12px;min-height:38px;display:flex}.z-chat-v2-footer-start{align-items:center;gap:8px;min-width:0;display:flex}.z-chat-v2-cancel,.z-chat-v2-send{border:1px solid var(--z-border);cursor:pointer;border-radius:14px;justify-content:center;align-items:center;min-height:38px;padding:0 14px;font-size:13px;font-weight:850;transition:opacity .14s,transform .14s,border-color .14s,background .14s;display:inline-flex}.z-chat-v2-cancel{background:var(--z-soft);color:var(--z-muted)}.z-chat-v2-send{border-color:var(--z-ink);background:var(--z-ink);min-width:78px;color:var(--z-white)}.z-chat-v2-cancel:hover,.z-chat-v2-send:not(:disabled):hover{transform:translateY(-1px)}.z-chat-v2-send:disabled{cursor:not-allowed;opacity:.42;transform:none}.z-chat-v2-attach{width:38px;padding:0}.z-response-parts{gap:12px;display:grid}.z-response-widget{border:1px solid var(--z-border);border-radius:var(--z-radius-card);background:var(--z-white);overflow:hidden}.z-response-widget>header{border-bottom:1px solid var(--z-border);justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;display:flex}.z-response-widget>header strong{font-size:13px}.z-response-widget>header span{color:var(--z-muted);font-size:11px;font-weight:850}.z-response-widget-grid{gap:10px;padding:12px;display:grid}.z-response-widget-grid>div{border:1px solid var(--z-border);background:var(--z-soft);border-radius:10px;gap:4px;padding:10px;display:grid}.z-chat-frame{background:var(--z-soft);grid-template-columns:64px minmax(0,1fr);position:relative}.z-chat-main{min-height:0;position:relative;overflow:hidden}.z-page-panel{border:1px solid var(--z-border);border-radius:var(--z-radius-card);background:var(--z-white);gap:14px;padding:18px;display:grid;box-shadow:0 10px 26px #1517190d}.z-page-panel.hero{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:18px}.z-page-panel h2,.z-page-panel h3{color:var(--z-ink);letter-spacing:0;margin:0}.z-page-panel h2{font-size:clamp(28px,4vw,44px);line-height:1}.z-page-panel h3{font-size:17px}.z-page-panel p{color:var(--z-muted);margin:0;line-height:1.75}.z-document-library-page{align-content:start;gap:16px;height:100%;padding:24px clamp(18px,4vw,46px);display:grid;overflow-y:auto}.z-document-reader{grid-template-columns:var(--z-document-chat-pane-width,420px) 18px minmax(0, 1fr);background:var(--z-white);height:100%;min-height:0;display:grid}.z-document-reader.pane-closed{grid-template-columns:minmax(0,1fr)}.z-document-empty-reader{background:var(--z-desk-ink);place-items:center;height:100%;min-height:0;padding:24px;display:grid}.z-document-empty-card{background:var(--z-desk-paper);text-align:center;width:min(520px,100%);box-shadow:var(--z-desk-shadow);border:1px solid #ffffff24;border-radius:12px;justify-items:center;gap:16px;padding:34px;display:grid}.z-document-empty-card>svg{width:34px;height:34px;color:var(--z-muted)}.z-document-empty-card h2{color:var(--z-ink);margin:4px 0 8px;font-size:24px}.z-document-empty-card p{color:var(--z-muted);margin:0;line-height:1.6}.z-document-empty-actions{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.z-document-reader-main{border:1px solid var(--z-border);border-radius:var(--z-radius-panel);background:#f2f4f4;grid-column:3;grid-template-rows:minmax(0,1fr);min-width:0;min-height:0;margin:14px 0 14px 14px;padding:12px;display:grid;overflow:hidden;box-shadow:inset 0 1px #ffffff8f}.z-document-reader.pane-closed .z-document-reader-main{grid-column:1;margin:14px}[dir=ltr] .z-document-reader-main{margin:14px 14px 14px 0}.z-document-reader .z-pdf-workbench{grid-template-columns:112px minmax(0,1fr);height:100%}.z-document-reader .z-pdf-context{display:none}.z-document-reader .z-pdf-page-scroll{background:#eef1f1;justify-content:center;align-items:flex-start;padding:26px;display:flex}.z-document-reader .z-pdf-page-scroll canvas{max-width:none}.z-document-library{border:1px solid var(--z-border);border-radius:var(--z-radius-card);background:var(--z-white);flex-direction:column;gap:14px;min-height:0;padding:14px;display:flex;overflow:auto;box-shadow:0 10px 26px #1517190d}.z-document-list{gap:10px;display:grid}.z-document-list article{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-soft);gap:7px;padding:12px;display:grid}.z-document-list article.active{background:var(--z-white);border-color:#0707075c}.z-document-list strong,.z-document-list span,.z-document-list small{text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.z-document-list button,.z-pdf-context button,.z-document-chat-strip button{border:1px solid var(--z-border-strong);border-radius:var(--z-radius-control);background:var(--z-white);min-height:32px;color:var(--z-ink);padding:0 10px;font-size:12px;font-weight:700}.z-pdf-workbench{grid-template-columns:96px minmax(0,1fr) minmax(220px,28%);gap:12px;height:100%;min-height:0;display:grid}.z-pdf-empty{border:1px dashed var(--z-border-strong);border-radius:var(--z-radius-card);background:var(--z-soft);min-height:360px;color:var(--z-muted);text-align:center;place-items:center;display:grid}.z-pdf-thumbs,.z-pdf-context{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-soft);min-height:0;padding:8px;overflow:auto}.z-pdf-thumbs{flex-direction:column;gap:8px;display:flex}.z-pdf-thumbs button{border:1px solid var(--z-border);background:var(--z-white);color:var(--z-muted);border-radius:12px;gap:4px;padding:6px;font-size:11px;display:grid}.z-pdf-thumbs button.active{color:var(--z-ink);border-color:#0707077a}.z-pdf-thumbs canvas{background:var(--z-white);border-radius:8px;width:100%;height:auto;display:block}.z-pdf-thumb-preview{background:var(--z-white);border-radius:8px;width:100%;display:block;overflow:hidden}.z-pdf-stage{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-panel);grid-template-rows:auto minmax(0,1fr);min-width:0;min-height:0;display:grid;position:relative}@supports (color:color-mix(in lab, red, red)){.z-pdf-stage{background:color-mix(in srgb, var(--z-panel) 72%, white)}}.z-pdf-stage{overflow:hidden}.z-pdf-toolbar{border-bottom:1px solid var(--z-border);grid-template-columns:auto minmax(180px,520px) max-content;align-items:center;gap:10px;padding:7px 12px;display:grid}.z-pdf-toolbar-left,.z-pdf-toolbar-center,.z-pdf-toolbar-right{align-items:center;gap:8px;min-width:0;display:flex}.z-pdf-toolbar-center{justify-content:center}.z-pdf-toolbar-right{justify-content:flex-end}.z-pdf-toolbar-actions{flex-wrap:nowrap;justify-content:flex-end;align-items:center;gap:6px;min-width:0;display:inline-flex}.z-pdf-toolbar-action{min-height:30px;color:var(--z-desk-ink-text);background:0 0;border:0;border-radius:7px;justify-content:center;align-items:center;gap:7px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.z-pdf-toolbar-action{color:color-mix(in srgb, var(--z-desk-ink-text) 62%, transparent)}}.z-pdf-toolbar-action{white-space:nowrap;cursor:pointer;padding:0 10px}.z-pdf-toolbar-action:hover{color:var(--z-desk-ink-text);background:#17150f0f}.z-pdf-toolbar-action:disabled{cursor:not-allowed;color:var(--z-console-faint);opacity:.58}.z-pdf-toolbar-action:disabled:hover{background:0 0}.z-pdf-toolbar-action svg{flex:none;width:15px;height:15px}.z-pdf-page-controls{color:var(--z-muted);align-items:center;gap:7px;font-size:12px;font-weight:700;display:inline-flex}.z-pdf-page-controls:not(.z-zoom-group) button{border:1px solid var(--z-console-border-strong);background:var(--z-console-panel);width:30px;height:30px;color:var(--z-console-text);border-radius:10px;place-items:center;display:inline-grid}.z-pdf-page-scroll{text-align:center;min-height:0;padding:26px 32px;position:relative;overflow:auto}.z-pdf-page-stack{flex-direction:column;align-items:center;gap:24px;min-width:max-content;margin-inline:auto;display:flex}.z-pdf-toolbar .z-pdf-tool-hub{flex:none;width:auto;position:relative}.z-pdf-tool-hub{z-index:9;align-items:center;display:inline-flex;position:relative}.z-pdf-tool-spinner{flex:none;width:16px;height:16px;animation:.8s linear infinite z-pdf-tool-spin}@keyframes z-pdf-tool-spin{to{transform:rotate(360deg)}}.z-pdf-thumbs h3{color:var(--z-muted);letter-spacing:.08em;text-transform:uppercase;margin:0 0 4px;font-size:10px;font-weight:850}.z-pdf-thumb-info{text-align:center;gap:2px;width:100%;display:grid}.z-pdf-thumb-info strong{color:var(--z-ink);font-size:11px;font-weight:850}.z-pdf-thumb-info span{color:var(--z-muted);font-size:11px;line-height:1.35}.z-pdf-page-scroll.markable{cursor:crosshair}.z-pdf-page-frame{isolation:isolate;flex:none;line-height:0;display:inline-block;position:relative;overflow:visible}.z-pdf-page-scroll canvas{z-index:1;background:var(--z-white);border-radius:8px;max-width:100%;height:auto;position:relative;box-shadow:0 16px 40px #15171921}.z-pdf-highlight-layer,.z-pdf-draw-layer{pointer-events:none;border-radius:8px;position:absolute;inset:0}.z-pdf-highlight-layer{z-index:3}.z-pdf-highlight-layer span{background:var(--z-pdf-action-highlight,#2f80ed);border-radius:2px;position:absolute}@supports (color:color-mix(in lab, red, red)){.z-pdf-highlight-layer span{background:color-mix(in srgb, var(--z-pdf-action-highlight,#2f80ed) 16%, transparent)}}.z-pdf-semantic-highlight-layer{--z-pdf-mask-highlight:var(--z-console-accent);--z-pdf-action-highlight:#2f80ed;--z-pdf-overlap-highlight:#f2c94c}.z-pdf-semantic-highlight-layer .z-pdf-highlight-mask{background:var(--z-pdf-mask-highlight)}@supports (color:color-mix(in lab, red, red)){.z-pdf-semantic-highlight-layer .z-pdf-highlight-mask{background:color-mix(in srgb, var(--z-pdf-mask-highlight) 18%, transparent)}}.z-pdf-semantic-highlight-layer .z-pdf-highlight-action{background:var(--z-pdf-action-highlight)}@supports (color:color-mix(in lab, red, red)){.z-pdf-semantic-highlight-layer .z-pdf-highlight-action{background:color-mix(in srgb, var(--z-pdf-action-highlight) 16%, transparent)}}.z-pdf-semantic-highlight-layer .z-pdf-highlight-overlap{background:var(--z-pdf-overlap-highlight)}@supports (color:color-mix(in lab, red, red)){.z-pdf-semantic-highlight-layer .z-pdf-highlight-overlap{background:color-mix(in srgb, var(--z-pdf-overlap-highlight) 24%, transparent)}}.z-pdf-search-layer span{background:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-search-layer span{background:color-mix(in srgb, var(--z-console-accent) 18%, transparent)}}.z-pdf-draw-layer{z-index:4;pointer-events:none;touch-action:pan-y}.z-pdf-draw-layer.mode-mark{pointer-events:auto;cursor:crosshair;touch-action:none}.z-pdf-draw-layer>svg{width:100%;height:100%;position:absolute;inset:0;overflow:visible}.z-pdf-draw-layer>svg polyline{fill:none;stroke:#1517199e;stroke-linecap:round;stroke-linejoin:round;stroke-width:3px}.z-pdf-draw-layer>svg rect.mark-stroke,.z-pdf-draw-layer>svg polygon.mark-stroke,.z-pdf-draw-layer>svg polyline.mark-stroke{fill:#0000;stroke:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-draw-layer>svg rect.mark-stroke,.z-pdf-draw-layer>svg polygon.mark-stroke,.z-pdf-draw-layer>svg polyline.mark-stroke{stroke:color-mix(in srgb, var(--z-console-accent) 68%, #15171973)}}.z-pdf-draw-layer>svg rect.mark-stroke,.z-pdf-draw-layer>svg polygon.mark-stroke,.z-pdf-draw-layer>svg polyline.mark-stroke{stroke-linejoin:round;stroke-width:2.4px}.z-pdf-draw-layer>svg rect.mark-stroke.overlap,.z-pdf-draw-layer>svg polygon.mark-stroke.overlap,.z-pdf-draw-layer>svg polyline.mark-stroke.overlap{stroke:#9f7a00}@supports (color:color-mix(in lab, red, red)){.z-pdf-draw-layer>svg rect.mark-stroke.overlap,.z-pdf-draw-layer>svg polygon.mark-stroke.overlap,.z-pdf-draw-layer>svg polyline.mark-stroke.overlap{stroke:color-mix(in srgb, #9f7a00 48%, var(--z-console-accent))}}.z-pdf-draw-layer>svg rect.mark-stroke.active-mark,.z-pdf-draw-layer>svg polygon.mark-stroke.active-mark{fill:#0000;stroke:var(--z-console-accent);stroke-width:3.2px}.z-pdf-draw-layer>svg polyline.mark-stroke:not(.circle):not(.text-backed){stroke:#15171994;stroke-width:3.2px}.z-pdf-draw-layer>svg polyline.mark-stroke.saved_note{stroke:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-draw-layer>svg polyline.mark-stroke.saved_note{stroke:color-mix(in srgb, var(--z-console-accent) 82%, #1517196b)}}.z-pdf-draw-layer>svg polyline.mark-stroke.active-mark{stroke:var(--z-console-accent);stroke-width:4px}.z-pdf-draw-layer>svg polyline.active{stroke:#151719d1}.z-pdf-mark-target{cursor:pointer;pointer-events:auto;z-index:4;background:0 0;border:1px solid #0000;border-radius:2px;min-width:26px;min-height:26px;position:absolute}.z-pdf-mark-target:hover,.z-pdf-mark-target.active{box-shadow:none;background:0 0;border-color:#0000}.z-pdf-mark-target:focus-visible{outline:2px solid var(--z-console-accent);outline-offset:2px}.z-pdf-mark-remove{width:22px;height:22px;color:var(--z-ink);pointer-events:auto;z-index:4;background:#fffffff5;border:1px solid #1517192e;border-radius:999px;place-items:center;padding:0;display:inline-grid;position:absolute;box-shadow:0 8px 18px #15171929}.z-pdf-mark-remove svg{width:12px;height:12px}:is(.z-pdf-mark-remove:hover,.z-pdf-mark-remove:focus-visible){border-color:var(--z-console-border-strong);background:var(--z-white)}.z-pdf-sticky-notes-layer{z-index:50;pointer-events:none;position:absolute;inset:0;overflow:visible}.z-pdf-sticky-notes-layer .z-pdf-sticky-card.composer{pointer-events:auto}.z-pdf-mark-target.sticky-reopen{cursor:pointer}.z-pdf-sticky-card{z-index:8;--z-sticky-paper:#f1dfa0;--z-sticky-paper-deep:#ddc679;--z-sticky-ink:#29261e;--z-sticky-muted:#71643f;--z-sticky-margin:var(--z-console-accent);gap:8px;width:min(312px,100% - 24px);min-width:min(260px,100% - 24px);max-height:calc(100% - 24px);display:grid;position:absolute;overflow:visible}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card{--z-sticky-margin:color-mix(in srgb, var(--z-console-accent) 24%, transparent)}}.z-pdf-sticky-card{--z-sticky-write-surface:#f2eee4;border:1px solid var(--z-console-border-strong);background:radial-gradient(circle at 1px 1px, #ffffff0a 1px, transparent 1.3px) 0 0 / 4px 4px, linear-gradient(180deg, #ffffff0f, transparent 30px), linear-gradient(#ffffff0d 1px, transparent 1px) 0 70px / 100% 30px, linear-gradient(90deg, transparent 45px, var(--z-sticky-margin) 45px, var(--z-sticky-margin) 46px, transparent 47px), linear-gradient(150deg, var(--z-sticky-paper), var(--z-sticky-paper-deep));border-radius:6px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card{background:radial-gradient(circle at 1px 1px, #ffffff0a 1px, transparent 1.3px) 0 0 / 4px 4px, linear-gradient(180deg, #ffffff0f, transparent 30px), linear-gradient(#ffffff0d 1px, transparent 1px) 0 70px / 100% 30px, linear-gradient(90deg, transparent 45px, var(--z-sticky-margin) 45px, var(--z-sticky-margin) 46px, transparent 47px), linear-gradient(150deg, color-mix(in srgb, var(--z-sticky-paper) 96%, white 4%), var(--z-sticky-paper-deep))}}.z-pdf-sticky-card{color:var(--z-sticky-ink);transform-origin:100% 0;pointer-events:auto;padding:12px;line-height:1.4;transition:transform .16s,box-shadow .16s;transform:translate(10px,-6px)rotate(-2deg);box-shadow:0 20px 42px #00000073,0 2px #ffffff1a}.z-pdf-sticky-card.composer{z-index:2}.z-pdf-sticky-card.composer.scratch{gap:10px;width:min(680px,100% - 24px);min-width:min(420px,100% - 24px);max-width:680px;padding:14px;transform:translate(6px,-8px)}[dir=rtl] .z-pdf-sticky-card.composer.scratch{transform:translate(-6px,-8px)}.z-pdf-sticky-focus-overlay{z-index:90;background:var(--z-desk-ink);pointer-events:auto;grid-area:-2/1/-1/-1;justify-content:stretch;align-items:stretch;min-width:0;min-height:0;padding:14px;display:flex;position:absolute;inset:0}.z-pdf-sticky-card.composer.focus{width:100%;min-width:0;max-width:none;height:100%;min-height:0;max-height:none;box-shadow:none;border:0;border-radius:0;grid-template-rows:auto minmax(0,1fr);gap:clamp(10px,1.2vw,16px);padding:clamp(16px,1.8vw,28px);display:grid;position:relative;inset:auto;overflow:hidden;transform:none}.z-pdf-sticky-card.composer.focus.has-source{grid-template-rows:auto auto minmax(0,1fr)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus{width:calc(100% - 112px);margin-inline-start:112px;transition:margin-inline-start .22s,margin-inline-end .22s,width .22s}@media (min-width:900px){.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay):has(.z-document-assistant-dock.expanded) .z-pdf-sticky-card.composer.focus{width:calc(100% - 438px);margin-inline-start:438px}}[dir=rtl] .z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus{margin-inline:0 112px}@media (min-width:900px){[dir=rtl] .z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay):has(.z-document-assistant-dock.expanded) .z-pdf-sticky-card.composer.focus{margin-inline:0 438px}}[dir=rtl] .z-pdf-sticky-card.composer.focus,.z-pdf-sticky-card.composer.focus:hover,.z-pdf-sticky-card.composer.focus:focus-within,[dir=rtl] .z-pdf-sticky-card.composer.focus:hover,[dir=rtl] .z-pdf-sticky-card.composer.focus:focus-within{transform:none}.z-pdf-sticky-card.composer.focus:before{display:none}.z-pdf-sticky-source{border:1px solid #ffffff1f;border-inline-start:3px solid var(--z-console-accent);background:var(--z-sticky-paper);border-radius:7px;gap:9px;max-height:188px;display:grid;overflow:auto}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-source{background:color-mix(in srgb, var(--z-sticky-paper) 92%, white 8%)}}.z-pdf-sticky-source{padding:14px 20px}.z-pdf-sticky-source>span:first-child{color:var(--z-console-accent);font-family:var(--z-font-mono), monospace;letter-spacing:.05em;text-transform:uppercase;font-size:13px;font-weight:830;line-height:1}.z-pdf-sticky-source p{color:var(--z-sticky-ink);white-space:pre-wrap;margin:0;font-size:21px;font-weight:700;line-height:1.4}.z-pdf-sticky-source-content .z-mixed-math-content{overflow-wrap:anywhere;display:inline}.z-pdf-sticky-source-content .z-mixed-math-inline,.z-pdf-sticky-source-content .z-mixed-math-display{direction:ltr;unicode-bidi:isolate}.z-pdf-sticky-source-content .z-mixed-math-inline{overflow-wrap:normal;vertical-align:-.08em;white-space:nowrap;word-break:normal;max-width:100%;margin-inline:.12em;display:inline-block}.z-pdf-sticky-source-content .z-mixed-math-display{text-align:center;width:100%;margin-block:.5em;display:block;overflow:auto hidden}.z-pdf-sticky-source-content .z-mixed-math-display .katex-display{margin:0}.z-pdf-sticky-source-content .katex,.z-pdf-sticky-source-content .katex *{color:var(--z-sticky-ink)!important;text-shadow:none!important;background:0 0!important}[dir=rtl] .z-pdf-sticky-card{transform-origin:0 0;transform:translate(-10px,-6px)rotate(2deg)}.z-pdf-sticky-card:hover,.z-pdf-sticky-card:focus-within{transform:translateY(-8px)rotate(-.7deg);box-shadow:0 24px 56px #00000080,0 2px #ffffff1f}[dir=rtl] .z-pdf-sticky-card:hover,[dir=rtl] .z-pdf-sticky-card:focus-within{transform:translateY(-8px)rotate(.7deg)}.z-pdf-sticky-card:before{content:"";border:1px solid var(--z-console-border-strong);width:76px;height:20px;position:absolute;inset-block-start:-9px;inset-inline-start:50%}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card:before{border:1px solid color-mix(in srgb, var(--z-console-border-strong) 60%, transparent)}}.z-pdf-sticky-card:before{background:repeating-linear-gradient(128deg, #ffffff3d 0 2px, transparent 2px 6px), var(--z-sticky-paper);border-radius:2px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card:before{background:repeating-linear-gradient(128deg, #ffffff3d 0 2px, transparent 2px 6px), color-mix(in srgb, var(--z-sticky-paper) 70%, white 30%)}}.z-pdf-sticky-card:before{opacity:.9;transform:translate(-50%)rotate(1deg);box-shadow:0 4px 10px #1f2b2429}.z-pdf-sticky-card.action-selector{cursor:pointer;align-content:start;min-height:112px}.z-pdf-sticky-card header{align-items:start;gap:5px;min-width:0;display:flex}.z-pdf-sticky-heading{flex:auto;gap:2px;min-width:0;display:grid}.z-pdf-sticky-heading strong{font-family:var(--z-font-display), var(--z-font-sans), serif;text-overflow:ellipsis;white-space:nowrap;font-size:18px;font-weight:820;line-height:1.1;overflow:hidden}.z-pdf-sticky-heading span{color:var(--z-sticky-muted);text-overflow:ellipsis;white-space:nowrap;font-size:11px;font-weight:720;line-height:1.2;overflow:hidden}.z-pdf-sticky-card form{gap:8px;min-width:0;display:grid}.z-pdf-sticky-card header input,.z-pdf-sticky-card textarea{width:100%;min-width:0;color:var(--z-sticky-ink);font:inherit;background:0 0;border:0;border-radius:0}.z-pdf-sticky-card header input{border-bottom:1px solid var(--z-sticky-ink);height:30px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card header input{border-bottom:1px solid color-mix(in srgb, var(--z-sticky-ink) 18%, transparent)}}.z-pdf-sticky-card header input{font-family:var(--z-font-display), var(--z-font-sans), serif;outline:none;padding:0 0 6px;font-size:17px;font-weight:780}.z-pdf-sticky-header-actions{flex-wrap:wrap;flex:none;justify-content:flex-end;gap:6px;max-width:min(100%,320px);display:flex}.z-pdf-sticky-tool-actions{align-items:center;gap:4px;min-width:0;display:flex}.z-pdf-sticky-card header button{border:1px solid var(--z-sticky-ink);place-items:center;width:25px;min-width:25px;height:25px;display:grid}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card header button{border:1px solid color-mix(in srgb, var(--z-sticky-ink) 14%, transparent)}}.z-pdf-sticky-card header button{background:var(--z-sticky-paper);border-radius:5px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card header button{background:color-mix(in srgb, var(--z-sticky-paper) 84%, white 16%)}}.z-pdf-sticky-card header button{color:var(--z-sticky-muted);cursor:pointer;padding:0}.z-pdf-sticky-card header button:hover,.z-pdf-sticky-card header button.active{border-color:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card header button:hover,.z-pdf-sticky-card header button.active{border-color:color-mix(in srgb, var(--z-console-accent) 42%, var(--z-sticky-ink) 14%)}}.z-pdf-sticky-card header button:hover,.z-pdf-sticky-card header button.active{background:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card header button:hover,.z-pdf-sticky-card header button.active{background:color-mix(in srgb, var(--z-console-accent) 12%, var(--z-sticky-paper))}}.z-pdf-sticky-card header button:hover,.z-pdf-sticky-card header button.active{color:var(--z-sticky-ink)}.z-pdf-sticky-card header button.primary{border-color:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card header button.primary{border-color:color-mix(in srgb, var(--z-console-accent) 58%, var(--z-sticky-ink) 12%)}}.z-pdf-sticky-card header button.primary{background:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card header button.primary{background:color-mix(in srgb, var(--z-console-accent) 18%, var(--z-sticky-paper))}}.z-pdf-sticky-card header button.primary{color:var(--z-sticky-ink)}.z-pdf-sticky-card header button:disabled{opacity:.42;cursor:not-allowed}.z-pdf-sticky-card header button svg{width:13px;height:13px}.z-pdf-sticky-card textarea{resize:vertical;outline:none;min-height:118px;padding:4px 0;font-size:13px;line-height:1.55}.z-pdf-sticky-lines{gap:8px;max-height:220px;padding-inline-end:2px;display:grid;overflow-y:auto}.z-pdf-sticky-card.focus .z-pdf-sticky-lines{max-height:32vh}.z-pdf-sticky-line-row{border:1px solid var(--z-sticky-ink);width:max-content;min-width:40px;max-width:100%;min-height:26px;display:inline-flex;position:relative}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-line-row{border:1px solid color-mix(in srgb, var(--z-sticky-ink) 12%, transparent)}}.z-pdf-sticky-line-row{background:var(--z-sticky-paper);border-radius:8px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-line-row{background:color-mix(in srgb, var(--z-sticky-paper) 96%, white 4%)}}.z-pdf-sticky-line-row{box-shadow:0 1px 0 var(--z-sticky-paper-deep);padding:6px 22px 6px 6px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-line-row{box-shadow:0 1px 0 color-mix(in srgb, var(--z-sticky-paper-deep) 70%, transparent)}}[dir=rtl] .z-pdf-sticky-line-row{padding:6px 6px 6px 22px}.z-pdf-sticky-line-ink{background:var(--z-sticky-write-surface);object-fit:contain;border-radius:4px;max-width:100%;max-height:92px;display:block;box-shadow:0 0 0 1px #0000004d}.z-pdf-sticky-card.focus .z-pdf-sticky-line-ink{max-height:140px}.z-pdf-sticky-tick{background:var(--z-sticky-paper);border-radius:50%;justify-content:center;align-items:center;width:17px;height:17px;display:inline-flex;position:absolute;inset-block-end:4px;inset-inline-end:4px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-tick{background:color-mix(in srgb, var(--z-sticky-paper) 92%, white 8%)}}.z-pdf-sticky-tick{box-shadow:0 1px 2px #00000024}.z-pdf-sticky-tick svg{width:13px;height:13px}.z-pdf-sticky-tick.double,.z-pdf-sticky-tick.single{color:var(--z-console-sage)}.z-pdf-sticky-tick.double{color:var(--z-console-accent)}.z-pdf-sticky-tick.warning{color:var(--z-console-gold)}.z-pdf-sticky-tick.invalid{color:var(--z-console-danger)}.z-pdf-sticky-tick.captured,.z-pdf-sticky-tick.pending{color:var(--z-sticky-muted)}.z-pdf-sticky-goal-dot{border:1px solid var(--z-console-accent);width:6px;height:6px;position:absolute;inset-block-start:6px;inset-inline-end:7px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-goal-dot{border:1px solid color-mix(in srgb, var(--z-console-accent) 72%, var(--z-console-border))}}.z-pdf-sticky-goal-dot{background:var(--z-console-accent);box-shadow:0 0 0 2px var(--z-sticky-paper);border-radius:50%}.z-pdf-sticky-tick.pending svg{animation:1.6s linear infinite z-pdf-sticky-tick-spin}@keyframes z-pdf-sticky-tick-spin{to{transform:rotate(360deg)}}.z-pdf-sticky-ink-pad{background:var(--z-sticky-write-surface);overscroll-behavior:contain;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;border:1px solid #0000004d;border-radius:7px;width:100%;min-height:0;display:block;position:relative;overflow:hidden;box-shadow:inset 0 1px #fff6,0 0 0 1px #00000059,0 6px 16px #00000059}.z-pdf-sticky-ink-pad canvas{width:100%;height:100%;box-shadow:none;touch-action:none;background:0 0;border:0;display:block;position:absolute;inset:0}.z-pdf-sticky-ink-pad canvas.z-pdf-sticky-ink-base{background:var(--z-sticky-write-surface);pointer-events:none}.z-pdf-sticky-ink-pad canvas.z-pdf-sticky-ink-live{background:0 0}.z-pdf-sticky-card.scratch .z-pdf-sticky-ink-pad{max-height:360px}.z-pdf-clear-drawing{width:34px;height:34px;color:var(--z-ink);pointer-events:auto;background:#fffffff0;border:1px solid #1517192e;border-radius:12px;place-items:center;padding:0;display:inline-grid;position:absolute;inset-block-start:14px;inset-inline-start:14px;box-shadow:0 12px 26px #15171924}.z-pdf-clear-drawing svg{width:16px;height:16px}.z-pdf-clear-drawing:hover{background:var(--z-white)}@keyframes z-pdf-action-menu-in{0%{opacity:0;scale:.96}to{opacity:1;scale:1}}.z-pdf-tool-hub-trigger{border:1px solid var(--z-console-accent-border);place-items:center;width:42px;height:42px;display:inline-grid}@supports (color:color-mix(in lab, red, red)){.z-pdf-tool-hub-trigger{border:1px solid color-mix(in srgb, var(--z-console-accent-border) 72%, var(--z-console-border))}}.z-pdf-tool-hub-trigger{background:var(--z-console-panel-raised);border-radius:15px}@supports (color:color-mix(in lab, red, red)){.z-pdf-tool-hub-trigger{background:color-mix(in srgb, var(--z-console-panel-raised) 92%, transparent)}}.z-pdf-tool-hub-trigger{cursor:pointer;padding:0;transition:border-color .14s,background .14s,transform .14s;overflow:hidden;box-shadow:0 12px 28px #0003}.z-pdf-tool-hub-trigger:hover,.z-pdf-tool-hub:focus-within .z-pdf-tool-hub-trigger{border-color:var(--z-console-accent-border);background:var(--z-console-panel-raised);transform:translateY(-1px)}.z-pdf-zohal-logo{object-fit:cover;border-radius:11px;width:30px;height:30px;display:block}.z-pdf-tool-hub-menu{border:1px solid var(--z-console-border);background:var(--z-console-panel-raised);border-radius:16px;gap:7px;min-width:218px;display:grid;position:absolute;inset-block-start:calc(100% + 8px);inset-inline-end:0}@supports (color:color-mix(in lab, red, red)){.z-pdf-tool-hub-menu{background:color-mix(in srgb, var(--z-console-panel-raised) 97%, transparent)}}.z-pdf-tool-hub-menu{color:var(--z-console-text);opacity:0;pointer-events:none;z-index:7;padding:9px;transition:opacity .14s,transform .14s;transform:translateY(-4px);box-shadow:0 18px 38px #00000047}.z-pdf-tool-hub:hover .z-pdf-tool-hub-menu,.z-pdf-tool-hub:focus-within .z-pdf-tool-hub-menu{opacity:1;pointer-events:auto;transform:translateY(0)}.z-pdf-tool-hub-cinema .z-pdf-tool-hub-menu{inset-block:auto calc(100% + 8px)}.z-pdf-tool-hub-brand{border-bottom:1px solid var(--z-console-border);color:var(--z-console-muted);align-items:center;gap:8px;padding:2px 3px 9px;font-size:11px;font-weight:820;display:flex}.z-pdf-tool-hub-item{border:1px solid var(--z-console-border);background:var(--z-console-panel);border-radius:12px;align-items:center;gap:8px;min-height:36px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.z-pdf-tool-hub-item{background:color-mix(in srgb, var(--z-console-panel) 86%, transparent)}}.z-pdf-tool-hub-item{color:var(--z-console-text);cursor:pointer;padding:0 11px;font-size:12px;font-weight:800}.z-pdf-tool-hub-item:hover,.z-pdf-tool-hub-item.active,.z-pdf-tool-hub-item.busy{border-color:var(--z-console-accent-border);background:var(--z-console-accent-soft)}.z-pdf-tool-hub-item:disabled{cursor:not-allowed;color:var(--z-console-faint);opacity:.56}.z-pdf-tool-hub-item:disabled:hover{border-color:var(--z-console-border);background:var(--z-console-panel)}@supports (color:color-mix(in lab, red, red)){.z-pdf-tool-hub-item:disabled:hover{background:color-mix(in srgb, var(--z-console-panel) 86%, transparent)}}.z-pdf-tool-hub-item svg{flex:none;width:15px;height:15px}.z-pdf-tool-hub-item small{background:var(--z-console-accent-soft);min-width:20px;color:var(--z-console-text);text-align:center;border-radius:999px;margin-inline-start:auto;padding:2px 7px;font-size:10px;font-weight:850;line-height:1.2}.z-pdf-context{flex-direction:column;gap:10px;display:flex}@media (max-width:980px){.z-pdf-sticky-card{width:100%;position:static}.z-pdf-sticky-card.composer.focus,[dir=rtl] .z-pdf-sticky-card.composer.focus{width:100%;max-width:none;height:100%;max-height:none;transform:none}.z-pdf-sticky-card.focus .z-pdf-sticky-ink-pad canvas{max-height:none}}.z-pdf-sanitized-page,.z-pdf-chunks article{border:1px solid var(--z-border);border-radius:var(--z-radius-row);background:var(--z-white);gap:8px;padding:10px;display:grid}.z-pdf-sanitized-page p,.z-pdf-chunks p{color:var(--z-body);white-space:pre-wrap;margin:0;font-size:12px;line-height:1.65}.z-pdf-chunks{gap:9px;display:grid}.z-pdf-chunks>strong,.z-pdf-chunks span{color:var(--z-muted);font-size:12px}.z-document-chat-strip{flex-wrap:wrap;align-items:center;gap:8px;padding:10px 16px 0;display:flex}.z-inline-citation{background:var(--z-white);min-width:0;min-height:0;color:var(--z-ink);vertical-align:super;cursor:pointer;border:1px solid #1517192e;border-radius:999px;justify-content:center;align-items:center;padding:0 3px;font-size:.68em;font-weight:900;line-height:1.2;display:inline-flex}:is(.z-inline-citation:hover,.z-inline-citation:focus-visible){background:var(--z-soft);border-color:#15171957}.z-document-chat-strip strong{color:var(--z-muted);font-size:12px}.z-inspector{z-index:45;transform-origin:100% 0;width:min(390px,100vw - 56px);max-height:min(640px,100vh - 74px);color:var(--z-white);opacity:0;pointer-events:none;background:#242626;border:1px solid #ffffff1c;border-radius:22px 0 22px 22px;flex-direction:column;gap:7px;padding:9px;transition:opacity .14s,transform .14s;display:flex;position:fixed;inset-block-start:58px;inset-inline-end:28px;overflow-y:auto;transform:translateY(-6px)scale(.98);box-shadow:0 24px 58px #00000052}[dir=rtl] .z-inspector{transform-origin:0 0;border-radius:0 24px 24px;inset-inline:28px auto}.z-inspector:before{content:"";background:#242626;width:74px;height:1px;position:absolute;inset-block-start:-1px;inset-inline-end:-1px}[dir=rtl] .z-inspector:before{inset-inline:-1px auto}.z-inspector.open{opacity:1;pointer-events:auto;transform:translateY(0)scale(1)}.z-inspector-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.z-inspector .z-chat-kicker{color:#ffffff8a;letter-spacing:.08em}.z-inspector .z-chat-icon-button{width:36px;height:36px;color:var(--z-white);background:#ffffff1a;border-color:#ffffff1a}.z-inspector p{color:#ffffff94}@media (max-width:980px){.z-chat-frame{grid-template-columns:58px minmax(0,1fr)}}@media (max-width:680px){.z-chat-frame{grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr}.z-inspector{border-radius:24px;width:auto;max-height:calc(100vh - 84px);inset-block-start:58px;inset-inline:10px}}.z-chat-frame{background:var(--z-panel);grid-template-rows:58px minmax(0,1fr);grid-template-columns:64px auto minmax(0,1fr)}.z-chat-main{background:var(--z-white);grid-area:2/3;grid-template-rows:minmax(0,1fr) auto;min-height:0;overflow:hidden}.z-chat-thread{background:var(--z-white);padding-block-start:42px}.z-chat-bubble{box-shadow:0 10px 26px #1517190f}.z-chat-composer-wrap{background:linear-gradient(to bottom, #fff0, var(--z-white) 28%)}.z-chat-composer{background:var(--z-white);border-radius:28px;position:relative}.z-chat-composer-upload{border-color:var(--z-border);background:var(--z-white);min-height:38px;color:var(--z-ink)}.z-chat-icon-only,.z-chat-composer-upload{justify-content:center;width:38px;padding:0}.z-chat-composer-upload svg{width:16px;height:16px}.z-account-menu{z-index:30;width:min(276px,100vw - 92px);color:var(--z-white);background:#323232;border:1px solid #ffffff24;border-radius:24px;gap:6px;padding:10px;display:grid;position:absolute;inset-block-end:0;inset-inline-start:calc(100% + 12px);box-shadow:0 24px 58px #00000052}[dir=rtl] .z-account-menu{inset-inline:auto calc(100% + 12px)}.z-public-account-menu,[dir=rtl] .z-public-account-menu{width:min(276px,100vw - 24px);inset-block:calc(100% + 10px) auto;inset-inline:auto 0}.z-account-menu-head{border-bottom:1px solid #ffffff24;align-items:center;gap:10px;padding:8px 8px 12px;display:flex}.z-account-menu-head div{gap:2px;min-width:0;display:grid}.z-account-menu-head strong{text-overflow:ellipsis;white-space:nowrap;color:var(--z-white);font-size:14px;font-weight:850;overflow:hidden}.z-account-menu-head span:last-child{color:#ffffff94;font-size:12px;font-weight:700}.z-account-menu-avatar{color:#111;background:#f2c600;border-radius:999px;flex:none;justify-content:center;align-items:center;width:38px;height:38px;font-size:12px;font-weight:900;display:inline-flex}.z-account-menu button{color:#ffffffe6;text-align:start;background:0 0;border:0;border-radius:14px;align-items:center;gap:10px;min-height:42px;padding:0 10px;font-size:14px;font-weight:760;display:flex}.z-account-menu button:hover{color:var(--z-white);background:#ffffff1f}.z-account-menu button.danger{color:#ffffffc7}.z-account-menu svg{width:18px;height:18px}.z-chat-frame{grid-template-columns:var(--z-console-sidebar-width,248px) minmax(0, 1fr);background:var(--z-white);grid-template-rows:58px minmax(0,1fr);position:relative}.z-console-sidebar{z-index:24;width:var(--z-console-sidebar-width,248px);min-width:var(--z-console-sidebar-width,248px);direction:inherit;border-inline-end:1px solid #ffffff1a;grid-area:1/1/-1;justify-self:start;align-items:stretch;gap:0;padding:14px 12px;transition:width .15s,min-width .15s,box-shadow .15s;position:relative;overflow:visible}.z-console-sidebar svg{flex:0 0 18px;width:18px;height:18px}.z-console-sidebar.collapsed{padding-inline:10px}.z-console-input{width:calc(100% - 16px);min-height:36px;color:var(--z-white);background:#ffffff12;border:1px solid #ffffff1f;border-radius:12px;outline:0;margin:0 8px 4px;padding:0 10px;font-size:13px}.z-console-input::placeholder{color:#ffffff61}.z-console-see-more{color:#ffffffc7;background:#ffffff14;border-color:#ffffff1f;min-height:30px;margin:4px 8px 0}.z-console-see-more svg{color:inherit}.z-console-muted{color:#ffffff7a;margin:4px 10px;font-size:11px}[dir=rtl] .z-chat-icon-arrow{transform:scaleX(-1)}.z-chat-main{grid-area:2/2}.z-settings-toggle{color:#ffffffe0;align-items:center;gap:8px;font-size:13px;font-weight:760;display:inline-flex}@media (max-width:980px){.z-chat-frame{grid-template-columns:minmax(72px, min(var(--z-console-sidebar-width,248px), 42vw)) minmax(0, 1fr);grid-template-rows:58px minmax(0,1fr)}.z-chat-main{grid-area:2/2;min-height:0;overflow:hidden}.z-document-library{min-height:280px}.z-pdf-workbench{grid-template-columns:76px minmax(0,1fr)}.z-pdf-context{grid-column:1/-1;max-height:320px}}@media (max-width:680px){.z-chat-frame{grid-template-rows:58px minmax(0,1fr);grid-template-columns:minmax(0,1fr);height:100%;min-height:0;overflow:hidden}.z-console-sidebar{z-index:70;inset-block:58px 0;border-inline-end:1px solid #ffffff1a;align-items:stretch;gap:0;width:min(320px,86vw);min-width:0;max-width:calc(100vw - 28px);transition:transform .18s;display:flex;position:fixed;left:0;right:auto;transform:translate(-100%);box-shadow:26px 0 70px #00000052;flex-direction:column!important;padding:14px 12px!important}[dir=rtl].z-console-sidebar{left:auto;right:0;transform:translate(100%);box-shadow:-26px 0 70px #00000052}.z-console-sidebar.open{transform:translate(0)}.z-chat-main{grid-area:2/1;min-width:0;min-height:0;overflow:hidden}.z-page-panel.hero,.z-pdf-workbench{grid-template-columns:1fr}.z-pdf-thumbs{flex-direction:row;overflow:auto hidden}.z-pdf-thumbs button{width:72px;min-width:72px}}.z-settings-toggle{min-width:0;color:var(--z-console-text);font-size:13px;font-weight:780}.z-settings-toggle input{width:18px;height:18px;accent-color:var(--z-console-accent)}}@layer utilities{.collapse{visibility:collapse}.invisible{visibility:hidden}.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.absolute{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.sticky{position:sticky}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.isolate{isolation:isolate}.order-8{order:8}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.m-5{margin:calc(var(--spacing) * 5)}.\!hidden{display:none!important}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.table{display:table}.table-cell{display:table-cell}.w-60{width:calc(var(--spacing) * 60)}.w-75{width:calc(var(--spacing) * 75)}.w-90{width:calc(var(--spacing) * 90)}.shrink{flex-shrink:1}.grow{flex-grow:1}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.flex-wrap{flex-wrap:wrap}.rounded{border-radius:.25rem}.border{border-style:var(--tw-border-style);border-width:1px}.stroke-1{stroke-width:1px}.stroke-2{stroke-width:2px}.stroke-4{stroke-width:4px}.text-sm{font-size:var(--text-sm);line-height:var(--tw-leading,var(--text-sm--line-height))}.lowercase{text-transform:lowercase}.uppercase{text-transform:uppercase}.italic{font-style:italic}.ordinal{--tw-ordinal:ordinal;font-variant-numeric:var(--tw-ordinal,) var(--tw-slashed-zero,) var(--tw-numeric-figure,) var(--tw-numeric-spacing,) var(--tw-numeric-fraction,)}.underline{text-decoration-line:underline}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.shadow{--tw-shadow:0 1px 3px 0 var(--tw-shadow-color,#0000001a), 0 1px 2px -1px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.invert{--tw-invert:invert(100%);filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.backdrop-filter{-webkit-backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,);backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.ease-in-out{--tw-ease:var(--ease-in-out);transition-timing-function:var(--ease-in-out)}.ease-out{--tw-ease:var(--ease-out);transition-timing-function:var(--ease-out)}.block-1{block-size:calc(var(--spacing) * 1)}.block-2{block-size:calc(var(--spacing) * 2)}}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_AMS-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/fonts/KaTeX_Caligraphic-Bold.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Caligraphic-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/fonts/KaTeX_Fraktur-Bold.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Fraktur-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/fonts/KaTeX_Main-Bold.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/fonts/KaTeX_Main-BoldItalic.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/fonts/KaTeX_Main-Italic.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Main-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/fonts/KaTeX_Math-BoldItalic.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/fonts/KaTeX_Math-Italic.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/fonts/KaTeX_SansSerif-Bold.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/fonts/KaTeX_SansSerif-Italic.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_SansSerif-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Script-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Size1-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Size2-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Size3-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Size4-Regular.woff2)format("woff2")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/fonts/KaTeX_Typewriter-Regular.woff2)format("woff2")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.17.0"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.newline{display:block}.katex .base{white-space:nowrap;width:min-content;position:relative}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{flex-direction:row;display:inline-flex}.katex .thinbox{width:0;max-width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--z-black:#0c0b0a;--z-charcoal:#141210;--z-card:#141210;--z-card-raised:#1a1714;--z-card-border:#ede8dc1a;--z-mint-white:#ede8dc;--z-muted-mint:#9b9485;--z-mint-bg:#e6dfcc;--z-clay:#c69a38;--z-clay-bright:#d2aa4c;--z-green:#c69a38;--z-acid:#d9a23b;--z-deep-green:#8aa382;--z-cyan-mint:#8aa0b8;--z-pen:#b76848;--z-rail:#0c0b0a;--z-ink:#2a2620;--z-body:#ede8dc;--z-muted:#9b9485;--z-bg:#0c0b0a;--z-panel:#141210;--z-soft:#f2eee4;--z-white:#f2eee4;--z-surface:#141210;--z-border:#ede8dc1a;--z-border-strong:#ede8dc2e;--z-success-bg:#8aa38224;--z-success:#8aa382;--z-success-text:#587250;--z-primary-on:#211a0a;--z-radius-frame:12px;--z-radius-panel:10px;--z-radius-card:8px;--z-radius-row:7px;--z-radius-control:7px;--z-shadow-frame:0 24px 60px -20px #0000008c;--z-shadow-card:0 18px 40px -18px #00000073;--z-shadow-composer:0 16px 36px #00000047;--z-shadow:0 24px 60px -20px #0000008c;--z-desk-night:#13100c;--z-desk-ink:#17150f;--z-desk-charcoal:#211e17;--z-desk-panel:#252118;--z-desk-panel-raised:#2c281e;--z-desk-input:#1d1a13;--z-desk-hover:#eee8dc0f;--z-desk-border:#eee8dc1a;--z-desk-border-strong:#eee8dc2e;--z-desk-text:#eee8dc;--z-desk-muted:#a69f91;--z-desk-faint:#777064;--z-desk-paper:#f2ecdf;--z-desk-paper-2:#e8dfcf;--z-desk-paper-edge:#d8cab0;--z-desk-grid:#4a3a1e13;--z-desk-ink-text:#17150f;--z-desk-hand-ink:#262833;--z-desk-highlight-yellow:#ffe74c73;--z-desk-gold:#c69a38;--z-desk-gold-soft:#dec27b;--z-desk-gold-deep:#9a7426;--z-desk-gold-on:#211a0a;--z-desk-gold-wash:#c69a3824;--z-desk-gold-border:#c69a3873;--z-desk-gold-hover:#d2aa4c;--z-desk-verified:#8aa382;--z-desk-verified-on:#f4f8f1;--z-desk-verified-wash:#8aa38229;--z-desk-sage-ink:#587250;--z-desk-rust:#b76848;--z-desk-rust-ink:#9a4a2e;--z-desk-rust-wash:#b7684829;--z-desk-shadow:0 24px 50px #00000038;--z-subject-calculus:#8aa0b8;--z-subject-calculus-cloth:#34465e;--z-subject-ode:#c99090;--z-subject-ode-cloth:#6a3c42;--z-subject-physics:#79abaa;--z-subject-physics-cloth:#26504f;--z-subject-statistics:#a67c52;--z-subject-statistics-cloth:#5a3f26;--z-console-black:#17150f;--z-console-bg:#17150f;--z-console-panel:#211e17;--z-console-panel-raised:#2c281e;--z-console-input:#1d1a13;--z-console-hover:#eee8dc0f;--z-console-border:#eee8dc1a;--z-console-border-strong:#eee8dc2e;--z-console-text:#eee8dc;--z-console-muted:#a69f91;--z-console-faint:#777064;--z-console-accent:#c69a38;--z-console-accent-on:#211a0a;--z-console-accent-soft:#c69a3824;--z-console-accent-border:#c69a3873;--z-console-accent-hover:#d2aa4c;--z-console-accent-hover-border:#d2aa4c9e;--z-console-accent-muted:#dec27b;--z-console-danger:#ff6b6b;--z-console-danger-soft:#ff6b6b24;--z-console-danger-border:#ff6b6b6b;--z-console-clay:#c2502b;--z-console-clay-bright:#d6622f;--z-console-clay-wash:#c2502b24;--z-console-sage:#8aa382;--z-console-sage-wash:#8aa38229;--z-console-sage-on:#f4f8f1;--z-console-gold:#c69a38;--z-console-gold-wash:#c69a3824;--z-console-verify:#8aa0b8;--z-console-verify-wash:#8aa0b824;--z-console-neutral-wash:#ffffff0f;--z-console-focus-bg:#e8dfcf;--z-console-focus-panel:#f2ecdf;--z-console-focus-panel-raised:#f7f2e8;--z-console-focus-border:#17150f1f;--z-console-focus-border-strong:#17150f33;--z-console-focus-text:#17150f;--z-console-focus-muted:#6d655a;--z-console-focus-faint:#a69f91;--z-console-focus-paper:#f2ecdf;--z-console-focus-grid:#17150f0f;--z-console-focus-shadow:0 18px 46px #17150f1a;--z-console-focus-assistant-bg:#e8dfcf;--z-console-focus-assistant-surface:#f7f2e8;--z-console-focus-assistant-status:#efe8d8;--z-console-focus-assistant-border:#17150f24;--z-notebook-paper:#f2ecdf;--z-notebook-paper-dim:#e8dfcf;--z-notebook-paper-text:#17150f;--z-notebook-paper-text-dim:#6d655a;--z-notebook-paper-shadow:0 24px 50px #00000038;--z-theme-text-primary:#ede8dc;--z-theme-text-secondary:#ede8dcad;--z-theme-text-nav:#ede8dcd6;--z-theme-header-bg:#0c0b0af5;--z-theme-header-border:#ede8dc14;--z-theme-hover-wash:#c69a381f;--z-theme-accent-border:#c69a38b8;--z-theme-accent-glow:#c69a382e;--z-theme-surface-a:#17150ff7;--z-theme-surface-b:#13100cfa;--z-theme-glow-a:#c69a3814;--z-theme-glow-b:#d9a23b0f;--z-theme-page-glow-a:#c69a380d;--z-theme-page-glow-b:#d9a23b0a;--z-theme-input-border:#ede8dc29;--z-theme-input-bg:#13100cd1;--z-theme-input-focus:#c69a388c;--z-theme-input-focus-ring:#c69a381f;--z-theme-divider:#ede8dc1f;--z-theme-light-section-glow:#c69a380d;--z-font-display:var(--z-font-display-loaded,var(--z-font-sans));--z-font-hand:var(--z-font-hand-loaded,cursive);--z-font-notebook-hand:var(--z-font-demo-hand-loaded,var(--z-font-hand))}::selection{color:var(--z-theme-text-primary);background:#c69a3859}.z-public-header,.z-site-header{border-color:var(--z-theme-header-border);background:var(--z-theme-header-bg);color:var(--z-theme-text-primary);box-shadow:var(--z-shadow-card);border-radius:7px}.z-public-brand,.z-site-brand,.z-public-header nav>a,.z-public-header .z-language-switch,.z-public-session-actions>a,.z-site-header nav>a,.z-site-header .z-language-switch{color:var(--z-theme-text-nav);font-family:var(--z-font-mono,ui-monospace, monospace);letter-spacing:.04em;font-size:12px;font-weight:500}.z-public-brand{font-family:var(--z-font-display);letter-spacing:-.01em;font-size:18px;font-weight:480}.z-public-brand:before,.z-site-brand:before{content:"";background:var(--z-clay);border-radius:50%;width:6px;height:6px;margin-inline-end:8px;display:inline-block}.z-auth-copy h1,.z-pricing-hero h1,.z-not-found h1,.z-pricing-card h2,.z-pricing-price,.z-site-auth h2,.z-contact-sales-sheet h2,.z-billing-checkout-head h2,.z-legal h1{color:var(--z-theme-text-primary);font-family:var(--z-font-display);letter-spacing:-.01em;font-weight:480}.z-auth-copy p:last-child,.z-pricing-hero>p:last-child,.z-pricing-copy,.z-pricing-card li,.z-contact-sales-sheet p,.z-contact-sales-grid label,.z-billing-checkout-head p{color:var(--z-theme-text-secondary);font-family:var(--z-font-sans)}.z-public-eyebrow{color:var(--z-muted);font-family:var(--z-font-mono,ui-monospace, monospace);letter-spacing:.16em;text-transform:uppercase;align-items:center;gap:10px;font-size:11px;font-weight:500;display:flex}.z-public-eyebrow:before{content:"";background:var(--z-clay);border-radius:50%;flex:none;width:6px;height:6px}.z-public-session-actions>a:last-child,.z-site-auth button:not(.z-site-auth-switch){box-shadow:0 0 24px var(--z-theme-accent-glow);border-radius:7px;border-color:var(--z-theme-accent-border)!important;background:var(--z-clay)!important;color:var(--z-primary-on)!important}.z-pricing-card,.z-site-auth,.z-contact-sales-sheet,.z-billing-checkout-sheet{border-color:var(--z-card-border);background:radial-gradient(circle at 82% 10%, var(--z-theme-glow-a), transparent 18rem), linear-gradient(180deg, var(--z-theme-surface-a), var(--z-theme-surface-b));color:var(--z-theme-text-primary)}.z-site-auth input{border-color:var(--z-theme-input-border);background:var(--z-theme-input-bg);color:var(--z-theme-text-primary);border-radius:7px}.z-site-auth p,.z-auth-divider{color:var(--z-theme-text-secondary)}.z-not-found{background:radial-gradient(circle at 72% 8%, var(--z-theme-light-section-glow), transparent 24rem), var(--z-mint-bg);color:var(--z-ink)}.z-pricing-currency-switch>div{border-color:var(--z-card-border);background:#0c0b0ac7}.z-pricing-currency-switch button{color:var(--z-theme-text-secondary)}.z-pricing-price-note{color:var(--z-muted)}.z-chat-kicker{font-family:var(--z-font-mono,ui-monospace, monospace);letter-spacing:.12em;text-transform:uppercase}.z-chat-frame,.z-chat-app{font-family:var(--z-font-console), var(--z-font-sans), sans-serif;font-size:13.5px}.riyal-sign{vertical-align:-.02em;flex:none;width:.63em;height:.7em;margin-inline:.12em;display:inline-block}*{box-sizing:border-box}body{background:var(--z-black);color:var(--z-body);font-family:var(--z-font-sans), Arial, Helvetica, sans-serif}.z-hand-integral{vertical-align:-.34em;width:.5em;height:1.35em;margin:0 .06em;display:inline-block}.z-seal{flex:none;overflow:visible}.z-seal .z-seal-face{fill:#0000}.z-seal .z-seal-track,.z-seal .z-seal-inner,.z-seal .z-seal-ticks path{stroke:currentColor;opacity:.28}.z-seal .z-seal-arc{stroke:var(--z-desk-gold)}.z-seal .z-seal-glyph{color:currentColor;opacity:.55}.z-seal.earned .z-seal-face{fill:#c69a3824}.z-seal.earned .z-seal-track,.z-seal.earned .z-seal-inner,.z-seal.earned .z-seal-ticks path{stroke:var(--z-desk-gold);opacity:.7}.z-seal.earned .z-seal-glyph{color:var(--z-desk-gold-soft);opacity:1}.z-sketch{width:100%;height:auto;display:block;overflow:visible}.z-sketch .z-sketch-paper{fill:#fbf6ea;stroke:var(--z-desk-hand-ink);stroke-width:1.6px}.z-sketch .z-sketch-soft{stroke:#26283342}.z-sketch .z-sketch-ink{stroke:var(--z-desk-hand-ink)}.z-sketch .z-sketch-accent{stroke:var(--z-desk-gold-deep)}.z-sketch .z-sketch-rust{stroke:var(--z-desk-rust)}.z-sketch .z-sketch-sage{stroke:var(--z-desk-sage-ink)}.z-sketch .z-sketch-note{fill:#f6e1d6;stroke:#b7684873;stroke-width:1.2px}.z-sketch .z-sketch-seal{fill:#c69a3829;stroke:var(--z-desk-gold-deep)}.z-sketch .z-sketch-text{fill:var(--z-desk-ink-text);font-family:var(--z-font-display), Fraunces, Georgia, serif;font-style:italic}.z-sketch .z-sketch-hand{fill:var(--z-desk-hand-ink);font-family:var(--z-font-notebook-hand)}.z-pen-loader{flex-direction:column;align-items:center;gap:10px;display:inline-flex}.z-pen-loader-sheet{border:1px solid var(--z-desk-paper-edge);background:linear-gradient(var(--z-desk-grid) 1px, transparent 1px), linear-gradient(90deg, var(--z-desk-grid) 1px, transparent 1px), var(--z-desk-paper);background-position:-1px -1px;background-size:12px 12px;border-radius:8px;flex:none;width:120px;height:76px;display:block;position:relative;box-shadow:0 1px 2px #17150f2e}.z-pen-loader-ink,.z-pen-loader-pen{position:absolute;top:0;left:0;overflow:visible}.z-pen-loader-ink path{fill:none;stroke:var(--z-desk-hand-ink);stroke-width:2.2px;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:100;stroke-dashoffset:100px;animation:1.9s infinite z-pen-loader-ink;animation-delay:var(--z-pen-loader-delay,0s)}.z-pen-loader-pen{offset-anchor:2px 22px;offset-rotate:0deg;offset-distance:0%;animation:1.9s infinite z-pen-loader-pen,1.9s linear infinite z-pen-loader-pen-fade;animation-delay:var(--z-pen-loader-delay,0s)}.z-pen-loader-pen-body{fill:var(--z-desk-hand-ink)}.z-pen-loader-pen-nib{fill:var(--z-desk-gold)}.z-pen-loader-pen-slit{stroke:var(--z-desk-hand-ink);stroke-width:.9px}.z-pen-loader-label{color:var(--z-console-muted);font-size:.875rem}@keyframes z-pen-loader-ink{0%{stroke-dashoffset:100px;opacity:1;animation-timing-function:cubic-bezier(.45,.1,.45,1)}62%{stroke-dashoffset:0;opacity:1}80%{stroke-dashoffset:0;opacity:1}to{stroke-dashoffset:0;opacity:0}}@keyframes z-pen-loader-pen{0%{offset-distance:0%;animation-timing-function:cubic-bezier(.45,.1,.45,1)}62%,to{offset-distance:100%}}@keyframes z-pen-loader-pen-fade{0%{opacity:0}6%,76%{opacity:1}90%,to{opacity:0}}@media (prefers-reduced-motion:reduce){.z-pen-loader-ink path{stroke-dashoffset:0;animation:none}.z-pen-loader-pen{offset-distance:100%;animation:none}}.z-public{background:var(--z-bg);min-height:100vh;color:var(--z-body);font-family:var(--z-font-sans), Arial, Helvetica, sans-serif;overflow-x:clip}.z-public-header{z-index:20;background:var(--z-rail);min-height:78px;color:var(--z-white);border-bottom:1px solid #ffffff1f;justify-content:space-between;align-items:center;gap:18px;padding:0 clamp(18px,5vw,72px);display:flex;position:sticky;top:0}.z-public-brand{color:var(--z-white);align-items:center;gap:10px;font-size:20px;font-weight:900;display:inline-flex}.z-public-brand img{border-radius:14px}.z-public-header nav{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:9px;display:flex}.z-public-header nav>a,.z-public-header .z-language-switch,.z-public-session-actions>a{color:#ffffffdb;background:0 0;border:0;border-radius:999px;justify-content:center;align-items:center;min-height:38px;padding:0 14px;font-size:13px;font-weight:800;display:inline-flex}.z-public-header nav>a:hover,.z-public-header .z-language-switch:hover,.z-public-session-actions>a:hover{color:var(--z-white);background:#ffffff14}.z-public-session-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:9px;display:inline-flex}.z-public-session-pending{width:92px;min-height:38px;display:inline-flex}.z-public-account-wrap{position:relative}.z-public-account-trigger{width:38px;height:38px;color:var(--z-white);cursor:pointer;background:#ffffff1f;border:0;border-radius:999px;justify-content:center;align-items:center;display:inline-flex}.z-public-account-trigger:hover,.z-public-account-trigger[aria-expanded=true]{background:#ffffff2e}.z-public-account-trigger span{color:#111;background:#f2c600;border-radius:999px;justify-content:center;align-items:center;width:28px;height:28px;font-size:11px;font-weight:900;display:inline-flex}.z-public-account-menu{inset-block:calc(100% + 10px) auto;inset-inline:auto 0}[dir=rtl] .z-public-account-menu{inset-inline:0 auto}.z-public-account-menu a,.z-public-account-menu button{text-align:start;background:0 0;border:0;border-radius:14px;align-items:center;gap:10px;min-height:38px;padding:0 10px;font-size:13px;font-weight:760;text-decoration:none;display:flex;color:#ffffffe0!important}.z-public-account-menu a:hover,.z-public-account-menu button:hover{background:#ffffff17;color:var(--z-white)!important}.z-public-eyebrow{color:var(--z-muted);letter-spacing:.08em;text-transform:uppercase;margin:0;font-size:12px;font-weight:900}.z-legal h1{color:var(--z-ink);letter-spacing:0;margin:14px 0 0}.z-legal p{color:var(--z-body);line-height:1.75}.z-public-pricing-hero{max-width:1060px}.z-not-found{background:var(--z-soft);align-content:center;gap:18px;min-height:calc(100vh - 178px);padding:clamp(56px,9vw,112px) clamp(20px,7vw,104px);display:grid}.z-not-found h1{max-width:760px;color:var(--z-ink);margin:0;font-size:clamp(42px,7vw,86px);line-height:.98}.z-not-found>p:not(.z-public-eyebrow){max-width:640px;color:var(--z-body);margin:0;font-size:clamp(17px,2vw,21px);line-height:1.75}.z-not-found-actions{flex-wrap:wrap;gap:10px;margin-top:8px;display:flex}.z-pricing-grid{align-items:stretch}.z-pricing-currency-switch{color:#dff0ddad;justify-content:flex-end;align-items:center;gap:12px;width:min(100% - 40px,1180px);margin:0 auto 18px;font-size:13px;font-weight:800;display:flex}.z-pricing-currency-switch>div{border:1px solid var(--z-card-border);background:#1b211ec7;border-radius:999px;align-items:center;gap:3px;padding:3px;display:inline-flex}.z-pricing-currency-switch button{color:#dff0ddb8;cursor:pointer;min-height:30px;font:inherit;background:0 0;border:0;border-radius:999px;justify-content:center;align-items:center;padding:0 13px;display:inline-flex}.z-pricing-currency-switch button[aria-pressed=true]{background:var(--z-green);color:var(--z-black)}.z-pricing-card{min-height:0}.z-pricing-price-note{color:#dff0dd8f;margin:-10px 0 16px;font-size:13px;font-weight:820}.z-legal{padding:clamp(42px,7vw,84px) clamp(20px,7vw,104px)}.z-legal header{max-width:980px}.z-legal h1{font-size:clamp(42px,7vw,82px);line-height:.98}.z-legal header p{max-width:820px;color:var(--z-body);margin:22px 0 0;font-size:18px}.z-legal header span{border:1px solid var(--z-border);background:var(--z-soft);color:var(--z-muted);border-radius:999px;margin-top:20px;padding:8px 12px;font-size:13px;font-weight:900;display:inline-flex}.z-legal-sections{gap:14px;margin-top:36px;display:grid}.z-legal section{border:1px solid var(--z-border);border-radius:var(--z-radius-card);background:var(--z-white);box-shadow:var(--z-shadow-card);padding:22px}.z-legal h2{color:var(--z-ink);margin:0;font-size:24px}.z-legal section p{color:var(--z-body);margin:12px 0 0;font-size:15px}@keyframes z-public-rise{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes z-public-hero-word{0%{opacity:0;transform:translateY(.32em)}to{opacity:1;transform:translateY(0)}}@keyframes z-public-soft-pop{0%{opacity:0;transform:translateY(10px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}@keyframes z-public-slide-inline{0%{opacity:0;transform:translate(14px)}to{opacity:1;transform:translate(0)}}@keyframes z-public-slide-inline-rtl{0%{opacity:0;transform:translate(-14px)}to{opacity:1;transform:translate(0)}}@keyframes z-public-scan{0%,to{opacity:.22;transform:translate(-12%)}50%{opacity:1;transform:translate(12%)}}@media (max-width:980px){.z-pricing-grid{grid-template-columns:1fr}}@media (max-width:720px){.z-public-header{flex-direction:column;justify-content:center;align-items:flex-start;padding-block:14px;position:static}.z-public-header nav{justify-content:flex-start}.z-legal h1{font-size:clamp(38px,13vw,58px)}}html{min-height:100%}body{background:var(--z-bg);min-height:100%;margin:0}a{color:inherit;text-decoration:none}::selection{background:var(--z-rail);color:var(--z-white)}.z-public,.z-site,.z-auth-page,.z-chat-app{background:radial-gradient(circle at 50% 10%, var(--z-theme-page-glow-a), transparent 24rem), radial-gradient(circle at 14% 24%, var(--z-theme-page-glow-b), transparent 22rem), var(--z-black)}.z-public-header,.z-site-header{z-index:40;border:1px solid var(--z-theme-header-border);background:var(--z-theme-header-bg);width:min(1480px,100% - 48px);min-height:64px;color:var(--z-theme-text-primary);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:999px;margin:16px auto 0;padding:0 16px 0 20px;position:sticky;top:16px;box-shadow:0 20px 70px #0000005c}.z-public-brand,.z-site-brand,.z-public-header nav>a,.z-public-header .z-language-switch,.z-public-session-actions>a,.z-site-header nav>a,.z-site-header .z-language-switch{color:var(--z-theme-text-nav)}.z-public-header nav>a:hover,.z-public-header .z-language-switch:hover,.z-public-session-actions>a:hover,.z-site-header nav>a:hover,.z-site-header .z-language-switch:hover{background:var(--z-theme-hover-wash);color:var(--z-green)}.z-auth-copy h1,.z-pricing-hero h1,.z-not-found h1,.z-pricing-card h2,.z-pricing-price,.z-site-auth h2,.z-contact-sales-sheet h2,.z-billing-checkout-head h2{color:var(--z-theme-text-primary);font-weight:620}.z-auth-copy p:last-child,.z-pricing-hero>p:last-child,.z-pricing-copy,.z-pricing-card li,.z-contact-sales-sheet p,.z-contact-sales-grid label,.z-billing-checkout-head p{color:var(--z-theme-text-secondary)}.z-public-session-actions>a:last-child,.z-button-primary,.z-site-auth button:not(.z-site-auth-switch){box-shadow:0 0 32px var(--z-theme-accent-glow);border-color:var(--z-theme-accent-border)!important;background:var(--z-green)!important;color:var(--z-primary-on)!important}.z-public-session-actions>a:last-child:after,.z-button-primary:after{content:"↗";margin-inline-start:.5em}.z-pricing-card,.z-site-auth,.z-contact-sales-sheet,.z-billing-checkout-sheet{border-color:var(--z-card-border);background:radial-gradient(circle at 82% 10%, var(--z-theme-glow-a), transparent 18rem), linear-gradient(180deg, var(--z-theme-surface-a), var(--z-theme-surface-b));color:var(--z-theme-text-primary);box-shadow:var(--z-shadow-card)}.z-site-auth label{color:var(--z-theme-text-nav)}.z-site-auth input{border-color:var(--z-theme-input-border);background:var(--z-theme-input-bg);color:var(--z-theme-text-primary)}.z-site-auth input::placeholder{color:var(--z-theme-text-secondary)}@supports (color:color-mix(in lab, red, red)){.z-site-auth input::placeholder{color:color-mix(in srgb, var(--z-theme-text-secondary) 56%, transparent)}}.z-site-auth input:focus{border-color:var(--z-theme-input-focus);box-shadow:0 0 0 4px var(--z-theme-input-focus-ring)}.z-site-auth p{color:var(--z-theme-text-secondary)}.z-site-auth p.z-auth-message{border:1px solid var(--z-desk-rust);background:var(--z-desk-rust-wash);color:var(--z-theme-text-primary);border-radius:8px;margin-top:14px;padding:12px 14px;font-size:14px;font-weight:500;line-height:1.55}.z-site-auth p.z-auth-message[data-tone=notice]{border-color:var(--z-desk-gold-border);border-inline-start:3px solid var(--z-desk-gold);background:var(--z-desk-gold-wash)}.z-site-auth p.z-auth-message[data-tone=success]{border-color:var(--z-console-sage);align-items:flex-start;gap:10px;display:flex}@supports (color:color-mix(in lab, red, red)){.z-site-auth p.z-auth-message[data-tone=success]{border-color:color-mix(in srgb, var(--z-console-sage) 55%, transparent)}}.z-site-auth p.z-auth-message[data-tone=success]{border-inline-start:3px solid var(--z-console-sage);background:var(--z-console-sage-wash)}.z-auth-check{width:18px;height:18px;color:var(--z-console-sage);flex:none;margin-top:2px}.z-auth-callback-check{width:52px;height:52px;color:var(--z-console-sage);justify-self:center;margin-top:18px}.z-auth-callback h1{max-width:22ch;color:var(--z-theme-text-primary);font-family:var(--z-font-display);margin-inline:auto;font-size:clamp(28px,4vw,44px);line-height:1.15}.z-auth-callback h1+p{color:var(--z-theme-text-secondary);margin:14px 0 0;font-size:16px}.z-auth-callback-action{background:var(--z-desk-gold);color:var(--z-desk-gold-on);border-radius:8px;justify-self:center;margin-top:26px;padding:12px 28px;font-weight:600;text-decoration:none}.z-auth-callback-action:hover{background:var(--z-desk-gold-hover)}.z-auth-divider{color:var(--z-theme-text-secondary)}@supports (color:color-mix(in lab, red, red)){.z-auth-divider{color:color-mix(in srgb, var(--z-theme-text-secondary) 76%, transparent)}}.z-auth-divider:before,.z-auth-divider:after{background:var(--z-theme-divider)}.z-auth-alt a{color:var(--z-green)}.z-auth-google{border-color:var(--z-theme-header-border)!important;background:var(--z-theme-input-bg)!important;color:var(--z-theme-text-primary)!important}.z-not-found,.z-chat-main,.z-chat-thread{background:radial-gradient(circle at 72% 8%, var(--z-theme-light-section-glow), transparent 24rem), var(--z-mint-bg);color:var(--z-ink)}.z-not-found h1,.z-markdown-response,.z-chat-message.assistant .z-chat-bubble p{color:var(--z-ink)}.z-chat-composer,.z-markdown-table-wrap{color:var(--z-ink);background:#ffffff8a;border-color:#05070521;box-shadow:0 18px 48px #05070514}@media (max-width:720px){.z-public-header,.z-site-header{border-radius:28px;width:min(100% - 24px,1480px);padding-block:12px;position:static}}.z-pricing-card{transition:border-color .16s,transform .16s,box-shadow .16s}.z-pricing-card:hover{box-shadow:0 24px 68px #1f9c1724, var(--z-shadow-card);border-color:#6ef05d5c;transform:translateY(-3px)}.z-shared-practice-hero{color:#f4efe5;background:radial-gradient(circle at 18% 20%,#c69a3817,#0000 34%),#151412;grid-template-columns:minmax(0,.92fr) minmax(420px,1.08fr);align-items:center;gap:clamp(28px,5vw,76px);min-height:calc(100vh - 92px);padding:clamp(72px,10vw,132px) clamp(22px,6vw,92px);display:grid}.z-shared-practice-copy>span,.z-shared-practice-unavailable>span{color:var(--z-desk-gold-soft);font:600 .72rem/1 var(--z-font-mono), monospace;letter-spacing:.13em;text-transform:uppercase}.z-shared-practice-copy h1,.z-shared-practice-unavailable h1{max-width:14ch;font:600 clamp(2.4rem, 5vw, 5.2rem)/.98 var(--z-font-display), Georgia, serif;letter-spacing:-.035em;margin:16px 0 22px}.z-shared-practice-statement{color:#e3ddd2;max-width:64ch;font-size:clamp(1.05rem,1.8vw,1.35rem);line-height:1.65}.z-shared-practice-copy>p{color:#aaa399}.z-shared-practice-actions{flex-wrap:wrap;gap:10px;margin:28px 0 14px;display:flex}.z-shared-practice-actions button{min-height:48px;font:650 .92rem/1 var(--z-font-sans), sans-serif;border:1px solid #f4efe533;border-radius:8px;padding:0 18px}.z-shared-practice-actions button.primary{border-color:var(--z-clay);background:var(--z-clay);color:var(--z-primary-on)}.z-shared-practice-actions button.secondary{color:#f4efe5;background:0 0}.z-shared-practice-actions button:disabled{cursor:wait;opacity:.62}.z-shared-practice-note{max-width:58ch;font-size:.86rem;line-height:1.5}.z-shared-practice-error{color:#f1a184!important}.z-shared-practice-paper{color:#2a2620;background-color:#f1e8d5;background-image:linear-gradient(#48688414 1px,#0000 1px),linear-gradient(90deg,#48688414 1px,#0000 1px),none;background-position:0 0,0 0,0 0;background-repeat:repeat,repeat,repeat;background-size:28px 28px;background-attachment:scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box;border:1px solid #362f2657;border-radius:10px 10px 18px;min-height:min(68vh,720px);overflow:hidden;transform:rotate(.7deg);box-shadow:0 34px 80px -34px #000}.z-shared-practice-paper header{font:600 .72rem/1 var(--z-font-mono), monospace;letter-spacing:.08em;text-transform:uppercase;background:#f1e8d5eb;border-bottom:1px solid #362f262e;justify-content:space-between;padding:15px 18px;display:flex}.z-shared-practice-paper header small{color:#765b4c}.z-shared-practice-paper img{object-fit:contain;width:100%;height:auto;display:block}.z-shared-practice-clean{text-align:center;color:#786f62;place-content:center;gap:10px;min-height:580px;display:grid}.z-shared-practice-clean span{font:500 5rem/1 var(--z-font-display), Georgia, serif;color:var(--z-clay)}.z-shared-practice-unavailable{color:#f4efe5;background:#151412;min-height:70vh;padding:18vh max(24px,8vw)}.z-shared-practice-unavailable p{color:#aaa399}@media (max-width:900px){.z-shared-practice-hero{grid-template-columns:1fr;padding-top:110px}.z-shared-practice-paper{min-height:480px;transform:none}}.z-guarantee-stamp{--stamp-ink:#e04e38;border:3px solid var(--stamp-ink);outline:1.5px solid var(--stamp-ink);outline-offset:3px;width:max-content;color:var(--stamp-ink);font-family:var(--z-font-display), Fraunces, serif;text-transform:uppercase;opacity:.95;border-radius:8px;justify-items:center;gap:2px;padding:10px 18px 9px;line-height:1;transition:transform .2s,opacity .2s;display:inline-grid;transform:rotate(-7deg);-webkit-mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='4'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1.5 1.55'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='4'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1.5 1.55'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E")}.z-guarantee-stamp:hover{opacity:1;transform:rotate(-5deg)scale(1.03)}.z-guarantee-stamp:lang(ar):hover{transform:rotate(5deg)scale(1.03)}@media (prefers-reduced-motion:reduce){.z-guarantee-stamp{transition:none}}.z-guarantee-stamp-percent{letter-spacing:-.01em;font-size:30px;font-weight:700}.z-guarantee-stamp-main{letter-spacing:.14em;font-size:15px;font-weight:700}.z-guarantee-stamp-sub{border-top:1.5px solid var(--stamp-ink);letter-spacing:.32em;padding-top:4px;font-size:11px;font-weight:600}.z-guarantee-stamp:lang(ar){transform:rotate(7deg)}.z-guarantee-stamp:lang(ar) .z-guarantee-stamp-main,.z-guarantee-stamp:lang(ar) .z-guarantee-stamp-sub{letter-spacing:0}.z-guarantee-stamp:lang(ar) .z-guarantee-stamp-main{font-size:18px}.z-guarantee-stamp:lang(ar) .z-guarantee-stamp-sub{font-size:14px}.z-public .z-pricing-card-stamped{position:relative}.z-pricing-card-stamped>.z-guarantee-stamp{transform-origin:100% 0;top:18px;position:absolute;inset-inline-end:14px;scale:.72}.z-pricing-card-stamped>.z-guarantee-stamp:lang(ar){transform-origin:0 0}.z-home{--h-night:var(--z-desk-night);--h-desk:var(--z-desk-ink);--h-desk-2:var(--z-desk-charcoal);--h-desk-3:var(--z-desk-panel);--h-line:#eee4ce17;--h-line-strong:#eee4ce29;--h-text:var(--z-desk-text);--h-text-dim:var(--z-desk-muted);--h-text-faint:var(--z-desk-faint);--h-paper:var(--z-desk-paper);--h-paper-2:var(--z-desk-paper-2);--h-paper-edge:var(--z-desk-paper-edge);--h-grid:var(--z-desk-grid);--h-ink:var(--z-desk-ink-text);--h-ink-dim:#6d6352;--h-hand:var(--z-desk-hand-ink);--h-gold:var(--z-desk-gold);--h-gold-soft:var(--z-desk-gold-soft);--h-gold-deep:var(--z-desk-gold-deep);--h-gold-on:var(--z-desk-gold-on);--h-gold-wash:var(--z-desk-gold-wash);--h-rust:var(--z-desk-rust);--h-rust-ink:var(--z-desk-rust-ink);--h-rust-wash:var(--z-desk-rust-wash);--h-sage:var(--z-desk-verified);--h-sage-ink:var(--z-desk-sage-ink);--h-sage-wash:var(--z-desk-verified-wash);--h-paper-shadow:0 1px 0 #fffaee80 inset, 0 2px 4px #0000002e, 0 24px 48px -18px #0000008c;--h-font-hand:var(--z-font-notebook-hand);background-color:var(--h-night);min-height:100vh;color:var(--h-text);font-family:var(--z-font-sans), sans-serif;-webkit-font-smoothing:antialiased;scroll-behavior:smooth;background-image:radial-gradient(circle,#eee4ce0b 1px,#0000 1.3px);background-size:28px 28px;font-size:16px;line-height:1.6}.z-home ::selection{color:inherit;background:#c69a3859}.z-home h1,.z-home h2,.z-home h3{font-family:var(--z-font-display), Fraunces, Georgia, serif;letter-spacing:-.015em;color:var(--h-text);margin:0;font-weight:450}.z-home:lang(ar) h1,.z-home:lang(ar) h2,.z-home:lang(ar) h3{font-family:var(--z-font-sans), sans-serif;letter-spacing:0;font-weight:600}.z-home p{margin:0}.z-home a{color:inherit;text-decoration:none}.z-home img{max-width:100%;display:block}.z-home sup{vertical-align:.42em;margin-inline-start:.04em;font-size:.62em;line-height:0}.z-home-wrap{max-width:1200px;margin:0 auto;padding:0 32px}@media (max-width:720px){.z-home-wrap{padding:0 20px}}.z-home-nav{z-index:50;border-bottom:1px solid var(--h-line);background:#13100cf0;position:sticky;top:0}.z-home-nav .z-home-wrap{align-items:center;gap:28px;height:64px;display:flex}.z-home-brand{font-family:var(--z-font-display), Fraunces, serif;color:var(--h-text);align-items:center;gap:10px;font-size:21px;font-weight:500;display:inline-flex}.z-home-brand img{border-radius:6px;width:28px;height:28px}.z-home-nav-links{color:var(--h-text-dim);gap:30px;margin-inline-start:12px;font-size:14px;display:flex}.z-home-nav-links a{transition:color .15s}.z-home-nav-links a:hover{color:var(--h-text)}.z-home-nav-actions{align-items:center;gap:10px;margin-inline-start:auto;display:flex}.z-home-nav .z-public-session-actions{align-items:center;gap:8px;display:inline-flex}.z-home-nav .z-public-session-actions>a{letter-spacing:0;text-transform:none;min-height:auto;color:var(--h-text-dim);background:0 0;border:0;border-radius:7px;padding:7px 10px;font-family:inherit;font-size:14px;font-weight:500}.z-home-nav .z-public-session-actions>a:hover{color:var(--h-text);background:#eee4ce0d}.z-home-nav .z-public-session-actions>a[href*=signup]{display:none}.z-home-nav .z-language-switch{border:1px solid var(--h-line-strong);min-height:32px;color:var(--h-text-dim);background:0 0;border-radius:7px;padding:0 11px;font-size:13px;font-weight:500}.z-home-nav .z-language-switch:hover{color:var(--h-text);background:#eee4ce0d}.z-home-nav .z-public-account-trigger{background:var(--h-gold-wash);color:var(--h-gold-soft)}.z-home-nav-cta{background:var(--h-gold);min-height:36px;color:var(--h-gold-on);white-space:nowrap;border-radius:8px;align-items:center;padding:0 16px;font-size:14px;font-weight:600;transition:background .15s;display:inline-flex}.z-home-nav-cta:hover{background:var(--z-desk-gold-hover)}.z-home-nav-cta-short{display:none}@media (max-width:900px){.z-home-nav-links,.z-home-nav .z-public-session-actions>a{display:none}}@media (max-width:520px){.z-home-nav .z-home-wrap{gap:12px}.z-home-brand{flex:none}.z-home-nav-actions{gap:8px}.z-home-nav .z-language-switch,.z-home-nav-cta{min-height:40px}.z-home-nav-cta-full{display:none}.z-home-nav-cta-short{display:inline}}.z-home-btn{border-radius:9px;justify-content:center;align-items:center;gap:10px;min-height:48px;padding:0 22px;font-size:15px;font-weight:600;transition:background .15s,border-color .15s,color .15s;display:inline-flex}.z-home-btn-primary{background:var(--h-gold);color:var(--h-gold-on);box-shadow:inset 0 1px #fff0c859,0 10px 24px -12px #c69a388c}.z-home-btn-primary:hover{background:var(--z-desk-gold-hover)}.z-home-btn-quiet{border:1px solid var(--h-line-strong);color:var(--h-text)}.z-home-btn-quiet:hover{background:#eee4ce0a;border-color:#eee4ce4d}.z-home-btn-arrow{transition:transform .15s}.z-home-btn:hover .z-home-btn-arrow{transform:translate(3px)}[dir=rtl] .z-home-btn-arrow{transform:scaleX(-1)}[dir=rtl] .z-home-btn:hover .z-home-btn-arrow{transform:scaleX(-1)translate(3px)}.z-home-hero{padding:48px 0 56px;position:relative;overflow:clip}.z-home-hero:before{content:"";pointer-events:none;background:radial-gradient(#c69a3812,#0000 65%);width:60%;height:90%;position:absolute;inset:-20% -10% auto auto}[dir=rtl] .z-home-hero:before{inset:-20% auto auto -10%}.z-home-hero-grid{grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);align-items:center;gap:40px;max-width:1320px;display:grid;position:relative}.z-home-hero h1{margin:0}.z-home-hero-title{color:var(--h-gold-soft);letter-spacing:-.03em;font-variation-settings:"opsz" 144, "SOFT" 30;text-wrap:balance;font-size:clamp(42px,5.4vw,68px);font-weight:500;line-height:1.02;display:block}.z-home-hero h1 em{color:var(--h-text);letter-spacing:-.01em;margin-top:18px;font-size:clamp(22px,2.3vw,28px);font-style:italic;font-weight:350;line-height:1.25;display:block}.z-home:lang(ar) .z-home-hero-title{letter-spacing:0;line-height:1.3}.z-home:lang(ar) .z-home-hero h1 em{letter-spacing:0;font-style:normal}.z-home .z-home-hero-detail{max-width:470px;color:var(--h-text-dim);margin-top:10px;font-size:13px;line-height:1.6}.z-home-hero-actions{flex-wrap:wrap;gap:10px;margin-top:22px;display:flex}.z-nb-wrap{min-width:0}.z-home-book[data-subject=calculus]{--subject:var(--z-subject-calculus);--cloth:var(--z-subject-calculus-cloth)}.z-home-book[data-subject=ode]{--subject:var(--z-subject-ode);--cloth:var(--z-subject-ode-cloth)}.z-home-book[data-subject=physics]{--subject:var(--z-subject-physics);--cloth:var(--z-subject-physics-cloth)}.z-home-book[data-subject=statistics]{--subject:var(--z-subject-statistics);--cloth:var(--z-subject-statistics-cloth)}.z-nb-problem-text{font-size:16px;line-height:1.45}.z-nb-page-physics .z-nb-ink{font-size:20px}@media (max-width:1080px){.z-home-hero-grid{grid-template-columns:1fr;gap:32px}.z-home-hero-copy{max-width:620px}}@media (max-width:760px){.z-home-hero{padding:32px 0 40px}.z-home-hero-grid{gap:24px}}.z-duo{--duo-bezel:10px;--duo-hinge:4px;--duo-radius:34px;--duo-screen-radius:25px;perspective:2600px;perspective-origin:50% 40%}.z-duo-device{aspect-ratio:1.34;width:100%;max-width:760px;transform-style:preserve-3d;margin-inline:auto;animation:1.6s cubic-bezier(.65,0,.35,1) .9s both z-duo-center;position:relative}.z-duo-label{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.z-duo-half{width:50%;transform-style:preserve-3d;position:absolute;top:0;bottom:0}.z-duo-left{padding:var(--duo-bezel) calc(var(--duo-hinge) / 2) var(--duo-bezel) var(--duo-bezel);border-radius:var(--duo-radius) 0 0 var(--duo-radius);background:#0b0b0c;animation:0s linear .9s both z-duo-show;left:0;box-shadow:0 0 0 1.5px #3a3a3e,0 50px 90px -40px #000000e6}.z-duo-right{transform-origin:0;animation:1.6s cubic-bezier(.65,0,.35,1) .9s both z-duo-unfold;left:50%}.z-duo-face{padding:var(--duo-bezel) var(--duo-bezel) var(--duo-bezel) calc(var(--duo-hinge) / 2);border-radius:0 var(--duo-radius) var(--duo-radius) 0;-webkit-backface-visibility:hidden;backface-visibility:hidden;background:#0b0b0c;position:absolute;inset:0;box-shadow:0 0 0 1.5px #3a3a3e}.z-duo-cover{padding:var(--duo-bezel);border-radius:var(--duo-radius) 0 0 var(--duo-radius);transform:rotateY(180deg)}.z-duo-screen{background:#f8f5ee;height:100%;position:relative;overflow:hidden}.z-duo-left .z-duo-screen,.z-duo-cover .z-duo-screen{border-radius:var(--duo-screen-radius) 0 0 var(--duo-screen-radius)}.z-duo-inner .z-duo-screen{border-radius:0 var(--duo-screen-radius) var(--duo-screen-radius) 0}.z-duo-camera{background:#050505;border-radius:50%;width:13px;height:13px;position:absolute;top:12px;left:14px}@keyframes z-duo-unfold{0%{transform:rotateY(-180deg)}to{transform:rotateY(0)}}@keyframes z-duo-center{0%{transform:translate(25%)rotateX(6deg)}to{transform:translate(0)rotateX(0)}}@keyframes z-duo-show{0%{visibility:hidden}to{visibility:visible}}.z-duo.notebook .z-duo-device,.z-duo.notebook .z-duo-right,.z-duo.notebook .z-duo-left{animation:none;transform:none}.z-duo-app{inset:var(--duo-bezel);z-index:2;transition:opacity .5s,visibility linear;position:absolute}.z-duo.textbook .z-duo-app{opacity:0;visibility:hidden;transition:none}.z-duo.textbook .z-nb *,.z-duo.textbook .z-nb :before{animation-play-state:paused!important}.z-duo .z-nb{height:100%;box-shadow:none;background:0 0;border:0;border-radius:0;padding:0}.z-duo .z-nb-screen{column-gap:var(--duo-hinge);background:0 0;border-radius:0;grid-template-rows:auto minmax(0,1fr);grid-template-columns:minmax(0,1fr) minmax(0,1fr);height:100%;display:grid;overflow:visible}.z-duo .z-nb-body{display:contents}.z-duo .z-nb-bar{background:var(--h-desk);border-start-end-radius:var(--duo-screen-radius);grid-area:1/2}.z-duo .z-nb-page{min-height:0;box-shadow:none;border-radius:0;border-end-end-radius:var(--duo-screen-radius);grid-area:2/2;margin:0;padding:18px 16px 18px 52px;animation:.45s both z-duo-page-in;overflow:hidden}@keyframes z-duo-page-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.z-duo .z-nb-screen{position:relative}.z-duo .z-nb-tutor{border:1px solid var(--h-line);background:var(--h-desk);border-radius:14px;grid-area:1/1/span 2;place-self:end center;gap:8px;width:min(270px,100% - 28px);margin-bottom:16px;padding:11px 13px 12px;font-size:12px;animation:.45s cubic-bezier(.3,.7,.2,1) 4.9s both z-duo-sheet-in,.6s 5.9s forwards z-nb-tutor-lit;position:static;box-shadow:0 18px 40px -16px #000000bf}.z-duo .z-nb-tutor>.z-nb-status{animation:.45s 4.9s both z-duo-note-in}.z-duo .z-nb-status-reading{display:none}.z-duo .z-nb-hint{gap:10px}.z-duo .z-nb-hint>p{font-size:15px;line-height:1.45}.z-duo .z-nb-tutor-foot,.z-duo .z-nb-turn>p:not(.z-nb-turn-error){display:none}.z-duo .z-nb-bar{min-height:56px;padding-inline-end:58px}:is(.z-duo .z-nb:has(.z-nb-tile>span+strong+span) .z-nb-bar,.z-duo .z-nb:has(.z-nb-turn .z-nb-check) .z-nb-bar){padding-inline-end:150px}:is(.z-duo .z-nb:has(.z-nb-tile>span+strong+span) .z-nb-bar-title,.z-duo .z-nb:has(.z-nb-turn .z-nb-check) .z-nb-bar-title){display:none}.z-duo .z-nb-turn{z-index:3;opacity:1;pointer-events:auto;top:8px;max-width:136px;position:absolute;inset-inline-end:10px}.z-duo .z-nb-check{width:auto;min-height:40px;padding:0 18px;box-shadow:0 10px 24px -12px #0009}.z-duo .z-nb-tile{min-width:0;height:40px;box-shadow:none;border-radius:999px;align-items:center;gap:6px;padding:2px;display:flex}.z-duo .z-nb-tile>span:first-child{margin:0}.z-duo .z-nb-tile>span:first-child>svg{width:34px;height:34px}.z-duo .z-nb-tile>span:first-child>span{width:15px;height:15px}.z-duo .z-nb-tile>strong{display:none}.z-duo .z-nb-tile>span+strong+span{padding-inline-end:10px;font-size:12.5px}.z-duo .z-nb-turn .z-nb-turn-error{border:1px solid var(--h-line);background:var(--h-desk);top:calc(100% + 6px);border-radius:8px;width:max-content;max-width:240px;padding:6px 10px;position:absolute;inset-inline-end:0}.z-duo .z-nb-tutor.note-tucked{pointer-events:none;animation:.4s both z-duo-card-out}.z-duo .z-nb-tutor.note-tucked>:not(.z-nb-turn){animation:.4s both z-duo-note-out}.z-duo .z-nb-tutor.note-reopened{animation:.35s cubic-bezier(.3,.7,.2,1) both z-duo-sheet-in,.6s .2s forwards z-nb-tutor-lit}.z-duo .z-nb-tutor.note-reopened>:not(.z-nb-turn){animation:.35s both z-duo-note-in}@keyframes z-duo-card-out{0%{background-color:var(--h-desk)}to{box-shadow:none;background-color:#0000;border-color:#0000}}@keyframes z-duo-note-out{to{opacity:0;visibility:hidden}}@keyframes z-duo-sheet-in{0%{box-shadow:none;background-color:#0000;border-color:#0000;margin-bottom:6px}}@keyframes z-duo-note-in{0%{opacity:0;visibility:hidden}to{opacity:1;visibility:visible}}@keyframes z-nb-tutor-lit{to{border-color:color-mix(in srgb, var(--h-gold) 55%, transparent);box-shadow:0 18px 40px -16px #000000b3, 0 0 0 3px color-mix(in srgb, var(--h-gold) 18%, transparent)}}.z-tb{color:#2f2a22;height:100%;font-family:var(--z-font-display), Fraunces, serif;align-content:start;gap:11px;padding:20px 22px 18px 24px;font-size:11.5px;line-height:1.45;display:grid}.z-duo-left .z-tb,.z-duo-cover .z-tb{padding-inline-start:28px}.z-tb-head{color:#8a7f6c;font-family:var(--z-font-sans), sans-serif;letter-spacing:.08em;text-transform:uppercase;border-bottom:1px solid #2f2a2229;justify-content:space-between;padding-bottom:6px;font-size:9px;font-weight:600;display:flex}.z-home:lang(ar) .z-tb-head{letter-spacing:0}.z-home .z-tb-title{color:#1d1914;margin:2px 0 0;font-size:22px;font-weight:500;line-height:1.1}.z-tb-title span{color:#b07b16}.z-tb-text{margin:0}.z-tb mark{color:inherit;background:linear-gradient(#0000 38%,#f0c44c8c 38%);border-radius:2px;padding:0 1px}.z-tb-objectives,.z-tb-key,.z-tb-strategy{border-radius:4px;gap:4px;padding:8px 10px;font-size:10.5px;display:grid}.z-tb-objectives{background:#f1e9d6;border-inline-start:3px solid #b07b16}.z-tb-key{background:#fbf6ea;border:1px solid #c9b68a}.z-tb-strategy{background:#e7ece2;border-inline-start:3px solid #6f8a63}.z-tb-objectives b,.z-tb-key b,.z-tb-strategy b{font-family:var(--z-font-sans), sans-serif;letter-spacing:.06em;text-transform:uppercase;font-size:9px}.z-home:lang(ar) .z-tb b{letter-spacing:0}.z-tb ul,.z-tb-strategy ol{gap:2px;margin:0;padding-inline-start:16px;display:grid}.z-tb-key dl{grid-template-columns:1fr auto;gap:3px 10px;margin:0;display:grid}.z-tb-key dd{margin:0;font-size:12px;font-style:italic}.z-tb-example{font-family:var(--z-font-sans), sans-serif;color:#6f8a63;margin-bottom:2px;font-size:10px;display:block}.z-tb-math{white-space:nowrap;font-style:italic}.z-home .z-tb-subhead{color:#1d1914;font-family:var(--z-font-sans), sans-serif;letter-spacing:.08em;text-transform:uppercase;margin:2px 0 0;font-size:10px;font-weight:700}.z-tb-problems{gap:9px;margin:0;padding:0;list-style:none;display:grid}.z-tb-problem{grid-template-columns:auto minmax(0,1fr);gap:7px;display:grid;position:relative}.z-tb-problem>span{font-weight:600}.z-tb-problem p{margin:0}.z-tb-loop{pointer-events:none;top:-9px;width:calc(100% + 22px);height:calc(100% + 18px);position:absolute;inset-inline-start:-12px;overflow:visible}.z-tb-loop path{stroke:var(--h-rust);stroke-linecap:round;stroke-linejoin:round;stroke-width:2.6px;vector-effect:non-scaling-stroke;stroke-dasharray:1400;stroke-dashoffset:1400px}.z-duo-inner .z-tb-loop path,.z-duo-left .z-tb-loop path{animation:1.2s linear 2.7s forwards z-nb-draw}.z-duo.notebook .z-tb-loop path{stroke-dashoffset:0;animation:none}.z-tb-figure{gap:4px;margin:0;display:grid}.z-tb-figure-art{width:100%;max-width:240px;height:auto}.z-tb-figure-art .ground{stroke:#8a7f6c;stroke-width:1px}.z-tb-figure-art .ramp{fill:#e9dfc8;stroke:#6d6352;stroke-width:1.2px}.z-tb-figure-art .angle{fill:none;stroke:#6d6352;stroke-width:1px}.z-tb-figure-art .block{fill:#c9a25a;stroke:#6d5a2e;stroke-width:1.2px}.z-tb-figure-art .force{fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-width:2px}.z-tb-figure-art .n{stroke:#3d6a8c}.z-tb-figure-art .f{stroke:#b7683f}.z-tb-figure-art .w{stroke:#4f6b45}.z-tb-figure-art .label{fill:#2f2a22;font-family:var(--z-font-display), Fraunces, serif;font-size:11px;font-style:italic}.z-tb-figure figcaption{color:#6d6352;font-size:9.5px}.z-tb-figure figcaption b{color:#2f2a22;font-family:var(--z-font-sans), sans-serif}@media (max-width:760px){.z-duo{--duo-bezel:8px;--duo-radius:30px;--duo-screen-radius:23px}.z-duo-device{aspect-ratio:auto;padding:var(--duo-bezel);border-radius:var(--duo-radius);background:#0b0b0c;animation:none;transform:none;box-shadow:0 0 0 1.5px #3a3a3e,0 40px 70px -30px #000000e6}.z-duo-left,.z-duo-inner{display:none}.z-duo-right{inset:var(--duo-bezel);left:var(--duo-bezel);width:auto;animation:none;transform:none}.z-duo-cover{border-radius:var(--duo-screen-radius);box-shadow:none;padding:0;transition:opacity .35s,visibility 0s linear .35s;transform:none}.z-duo-cover .z-duo-screen{border-radius:var(--duo-screen-radius)}.z-duo-cover .z-tb-loop path{animation:1.2s linear .6s forwards z-nb-draw}.z-duo.notebook .z-duo-cover{opacity:0;visibility:hidden}.z-duo-app{transition:opacity .5s .35s,visibility 0s linear .35s;position:relative;inset:auto}.z-duo .z-nb-screen{border-radius:var(--duo-screen-radius);background:var(--h-desk);grid-template-rows:auto minmax(0,1fr);grid-template-columns:minmax(0,1fr);overflow:hidden}.z-duo .z-nb-bar{grid-area:1/1;justify-content:flex-start;padding-inline-end:10px}.z-duo .z-nb:has(.z-nb-tile>span+strong+span) .z-nb-bar{grid-area:1/1;justify-content:flex-start;padding-inline-end:10px}.z-duo .z-nb:has(.z-nb-turn .z-nb-check) .z-nb-bar{grid-area:1/1;justify-content:flex-start;padding-inline-end:10px}.z-duo .z-nb-bar-title{display:none}.z-duo .z-nb-page,.z-duo .z-nb-tutor{grid-area:2/1}.z-duo .z-nb-page{border-radius:4px;margin:0 8px 8px;padding:18px 14px 88px 40px}.z-duo .z-nb-tutor{z-index:2;width:calc(100% - 36px);margin-bottom:20px}.z-duo .z-nb-tool-done,.z-duo .z-nb-tool.pen.on .z-nb-tool-done{display:none}.z-duo .z-nb-turn{max-width:calc(100% - 214px)}.z-tb{gap:14px;padding:26px 22px;font-size:13px}}@media (prefers-reduced-motion:reduce){.z-duo-device,.z-duo-right,.z-duo-left{animation:none;transform:none}}.z-nb{background:#0d0b08;border:1px solid #eee4ce14;border-radius:18px;margin:0;padding:10px;box-shadow:0 50px 90px -40px #000000d9,0 0 0 1px #0006}.z-nb-screen{background:var(--h-desk);border-radius:10px;overflow:hidden}.z-nb-body{grid-template-columns:minmax(0,1fr) 216px;min-height:400px;display:grid}.z-nb-page{background-color:var(--h-paper);background-image:linear-gradient(90deg, transparent 43px, #b7684847 43px, #b7684847 44px, transparent 44px), linear-gradient(var(--h-grid) 1px, transparent 1px), linear-gradient(90deg, var(--h-grid) 1px, transparent 1px);box-shadow:var(--h-paper-shadow);color:var(--h-ink);margin:14px;background-size:100% 100%,22px 22px,22px 22px;border-radius:4px;margin-inline-end:0;padding:22px 26px 26px 58px;position:relative}.z-nb-problem{border-bottom:1px solid #1d19141f;flex-wrap:wrap;align-items:baseline;gap:6px 12px;margin-bottom:8px;padding-bottom:14px;display:flex}.z-nb-problem-label{color:var(--h-ink-dim);letter-spacing:.08em;text-transform:uppercase;font-size:12px;font-weight:600}.z-nb-problem-ask{font-family:var(--z-font-display), Fraunces, serif;font-size:17px}.z-nb-lines{margin:0;padding:0;list-style:none;position:relative}.z-nb-line{flex-wrap:wrap;align-items:center;column-gap:10px;min-height:50px;display:flex;position:relative}.z-nb-ink{color:var(--h-hand);font-family:var(--h-font-hand);white-space:nowrap;clip-path:inset(-20% 100% -40% 0);font-size:27px;line-height:1.2;animation:.95s cubic-bezier(.55,.1,.35,1) forwards z-nb-write;display:inline-block}.z-nb-line.l1 .z-nb-ink{animation-delay:.5s}.z-nb-line.l2 .z-nb-ink{animation-delay:1.4s}.z-nb-line.l3 .z-nb-ink{animation-delay:2.3s}.z-nb-line.l4 .z-nb-ink{animation-delay:3.2s}@keyframes z-nb-write{to{clip-path:inset(-20% -4% -40% 0)}}.z-nb-tick{width:18px;height:18px;color:var(--h-sage-ink);opacity:0;flex:none;animation:.4s forwards z-nb-fade}.z-nb-line.l1 .z-nb-tick{animation-delay:4.1s}.z-nb-line.l2 .z-nb-tick{animation-delay:4.25s}.z-nb-line.l3 .z-nb-tick{animation-delay:4.4s}@keyframes z-nb-fade{to{opacity:1}}.z-nb-slip{font-weight:inherit;position:relative}.z-nb-slip:before{content:"";background:var(--h-rust-wash);opacity:0;border-radius:4px;animation:.5s 4.6s forwards z-nb-fade;position:absolute;inset:-2px -4px -1px}.z-nb-slip svg{width:calc(100% + 4px);height:9px;position:absolute;bottom:-9px;left:-2px;right:-2px;overflow:visible}.z-nb-slip path{fill:none;stroke:var(--h-rust);stroke-width:2.4px;stroke-linecap:round;stroke-dasharray:110;stroke-dashoffset:110px;animation:.7s 4.6s forwards z-nb-draw}@keyframes z-nb-draw{to{stroke-dashoffset:0}}@keyframes z-nb-note-in{to{opacity:1;transform:none}}.z-nb-tutor{color:var(--h-text);flex-direction:column;gap:16px;padding:16px 16px 14px;font-size:13px;display:flex;position:relative}.z-nb-status{min-height:20px;font-size:12.5px;font-weight:500;position:relative}.z-nb-status>span{opacity:0;align-items:center;gap:8px;display:inline-flex;position:absolute;inset:0}.z-nb-status i{border-radius:50%;width:7px;height:7px}.z-nb-status-reading{color:var(--h-text-faint);animation:.3s .4s forwards z-nb-fade,.3s 4.7s forwards z-nb-out}.z-nb-status-flagged{color:#e2a387;animation:.4s 5s forwards z-nb-fade}.z-nb-status-flagged i,.z-nb-status-live.flagged i{background:var(--h-rust)}.z-nb-status.live .z-nb-status-reading,.z-nb-status.live .z-nb-status-flagged{visibility:hidden}.z-nb-status>.z-nb-status-live{color:var(--h-text-dim);opacity:1;animation:none}.z-nb-status-live.flagged{color:#e2a387}.z-nb-status-live.verified{color:var(--h-sage)}.z-nb-status-live.verified i{background:var(--h-sage)}@keyframes z-nb-out{to{opacity:0}}.z-nb-hint{opacity:0;gap:6px;animation:.5s 5.4s forwards z-nb-fade;display:grid}.z-nb-hint small{color:var(--h-text-faint);letter-spacing:.06em;text-transform:uppercase;font-size:11px;font-weight:600}.z-home:lang(ar) .z-nb-hint small{letter-spacing:0}.z-nb-hint>p{color:var(--h-text);font-family:var(--z-font-display), Fraunces, serif;text-wrap:pretty;font-size:15px;line-height:1.5}.z-home:lang(ar) .z-nb-hint>p{font-family:inherit}.z-nb-status>.z-nb-status-count{color:var(--h-text-faint);white-space:nowrap;font-size:11px;font-weight:500;animation:.4s 5s forwards z-nb-fade;inset-inline-start:auto}.z-nb-status.live .z-nb-status-count{visibility:hidden}.z-nb-hint-foot{border-top:1px solid var(--h-line);justify-content:space-between;align-items:center;gap:10px;padding-top:9px;display:flex}.z-nb-reading{min-width:0;color:var(--h-text-faint);white-space:nowrap;text-overflow:ellipsis;align-items:center;gap:6px;font-size:11.5px;font-weight:500;display:inline-flex;overflow:hidden}.z-nb-reading svg{fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.5px;flex:none;width:14px;height:14px}.z-nb-next-hint{color:var(--h-gold-soft);cursor:pointer;background:0 0;border:0;flex:none;padding:2px 0;font-size:12px;font-weight:600}.z-nb-next-hint span{transition:transform .2s;display:inline-block}[dir=rtl] .z-nb-next-hint span{transform:scaleX(-1)}.z-nb-next-hint:hover span{transform:translate(2px)}[dir=rtl] .z-nb-next-hint:hover span{transform:scaleX(-1)translate(2px)}.z-nb-next-hint:focus-visible{outline:2px solid var(--h-gold-soft);outline-offset:2px;border-radius:4px}.z-nb-tutor-foot{border-top:1px solid var(--h-line);min-height:18px;color:var(--h-text-faint);margin-top:auto;padding-top:12px;font-size:11.5px;position:relative}.z-nb-tutor-foot span{opacity:0;position:absolute;inset:12px 0 0}.z-nb-foot-partial{animation:.4s 4.4s forwards z-nb-fade}.z-nb.ready .z-nb-foot-partial{color:var(--h-gold)}.z-nb.phase-verified .z-nb-foot-partial{color:var(--h-sage)}@media (max-width:760px){.z-nb{border-radius:14px;padding:6px}.z-nb-body{grid-template-columns:minmax(0,1fr)}.z-nb-page{background-size:100% 100%,20px 20px,20px 20px;background-image:linear-gradient(90deg, transparent 27px, #b7684847 27px, #b7684847 28px, transparent 28px), linear-gradient(var(--h-grid) 1px, transparent 1px), linear-gradient(90deg, var(--h-grid) 1px, transparent 1px);margin:10px;padding:18px 16px 20px 40px}.z-nb-ink{font-size:22px}.z-nb-tutor{border-top:1px solid var(--h-line)}}.z-home-section{border-top:1px solid var(--h-line);padding:56px 0}.z-home-skills,.z-home-cta{background:#17150f8c}.z-home-head{max-width:720px;margin-bottom:22px}.z-home-k{color:var(--h-gold);margin-bottom:10px;font-size:13px;font-weight:500;display:inline-block}.z-home-head h2{letter-spacing:-.02em;font-size:clamp(24px,2.6vw,32px);line-height:1.12}.z-home:lang(ar) .z-home-head h2{line-height:1.3}.z-home-head p{max-width:580px;color:var(--h-text-dim);font-size:15px;line-height:1.6;margin-top:8px!important}@supports (animation-timeline:view()){.z-home-section .z-home-head,.z-home-steps>li,.z-home-bento>article,.z-home-shelf-row>li,.z-plan-copy,.z-plan-desk{animation:linear both z-home-rise;animation-timeline:view();animation-range:entry entry 40%}}@keyframes z-home-rise{0%{opacity:0;transform:translateY(18px)}}.z-home-paper{--h-text:var(--z-desk-ink-text);--h-text-dim:#5c5344;--h-text-faint:#7d7363;--h-line:#4a3a1e24;--h-line-strong:#4a3a1e3d;--h-gold-soft:#87661f;color:var(--h-text);border-top-color:var(--h-paper-edge);background-color:#efe8d9;background-image:radial-gradient(#4a3a1e12 1px,#0000 1px);background-size:26px 26px}.z-home-paper .z-home-k{color:#87661f}.z-home-session{grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);align-items:start;gap:40px;display:grid}.z-home-sheet{background-color:var(--h-paper);background-image:linear-gradient(90deg, transparent 51px, #b7684852 51px, #b7684852 52px, transparent 52px), linear-gradient(var(--h-grid) 1px, transparent 1px), linear-gradient(90deg, var(--h-grid) 1px, transparent 1px);box-shadow:0 1px 0 var(--h-paper-edge), 0 30px 60px -20px #3c2c144d, 0 6px 14px #3c2c1414;color:var(--h-hand);background-size:auto,22px 22px,22px 22px;border-radius:4px;padding:22px 26px 20px 72px;position:relative;transform:rotate(-.5deg)}[dir=rtl] .z-home-sheet{transform:rotate(.5deg)}.z-home-sheet-n{color:#87661f;font-family:var(--z-font-display), Fraunces, serif;font-size:15px;font-style:italic;position:absolute;inset-inline-start:18px}.z-home-sheet-problem{border-bottom:1px solid var(--h-paper-edge);color:var(--h-ink);font-family:var(--z-font-display), Fraunces, serif;margin-bottom:6px;padding-bottom:10px;font-size:16px;line-height:1.45;position:relative}.z-home:lang(ar) .z-home-sheet-problem{font-family:inherit}.z-home-sheet-problem .z-home-sheet-n{top:3px;left:-54px;right:auto}.z-home-sheet-lines{font-family:var(--h-font-hand);font-size:20px;line-height:1.75;position:relative}.z-home-sheet-lines p{align-items:center;gap:14px;display:flex;position:relative}.z-home-sheet-lines .z-home-sheet-n,.z-home-sheet-skill .z-home-sheet-n{top:50%;left:-54px;right:auto;transform:translateY(-50%)}.z-home-sheet-lines .z-home-ink{white-space:nowrap;align-items:center;display:inline-flex}.z-home-sheet-lines .z-home-ink .z-home-tick{margin-inline-start:10px}.z-home-sheet-lines sub{font-size:12px}.z-home-sheet-lines .z-home-tick{vertical-align:middle;width:18px;height:18px}.z-home-sheet .z-home-margin-note{color:#5a2c1a;max-width:200px;font-family:var(--z-font-sans), sans-serif;background:#f6ddd0;border:1px solid #9a4a2e52;border-radius:6px;gap:2px;margin-inline-start:auto;padding:6px 10px;font-size:12.5px;line-height:1.35;display:grid;transform:rotate(1.5deg)}.z-home-sheet .z-home-margin-note small{color:var(--h-rust-ink);font-family:var(--z-font-display), Fraunces, serif;font-size:12.5px;font-style:italic}.z-home-sheet-skill{border-top:1px solid var(--h-paper-edge);color:var(--h-ink);align-items:center;gap:12px;margin-top:10px;padding-top:10px;font-size:14px;display:flex;position:relative}.z-home-sheet-skill svg{fill:none;width:34px;height:34px;stroke:var(--h-sage-ink);stroke-width:1.6px;flex:none}.z-home-sheet-skill svg path:first-child{fill:#8aa38238}.z-home-sheet-skill svg circle{fill:var(--h-gold);stroke:none}.z-home-sheet-skill strong{color:var(--h-sage-ink);font-weight:600}.z-home-sheet-skill small{color:#5c5344;font-size:13.5px;display:block}.z-home-steps{gap:2px;margin:-8px 0 0;padding:0;list-style:none;display:grid}.z-home-steps li{--step-tone:var(--h-gold);--step-ink:#87661f;cursor:default;border-radius:12px;gap:16px;padding:10px 14px 10px 18px;transition:background-color .3s;display:flex;position:relative}[dir=rtl] .z-home-steps li{padding:10px 18px 10px 14px}.z-home-steps li.slip{--step-tone:var(--h-rust);--step-ink:var(--h-rust-ink)}.z-home-steps li.earned{--step-tone:var(--h-sage);--step-ink:var(--h-sage-ink)}.z-home-steps li:before,.z-home-steps li:after{content:"";border-radius:2px;width:2px;position:absolute;inset-block:12px;inset-inline-start:0}.z-home-steps li:before{background:#3c2c141f}.z-home-steps li:after{background:var(--step-tone);transform-origin:top;transition:transform .35s cubic-bezier(.2,.7,.2,1);transform:scaleY(0)}.z-home-steps li[data-state=past]:after{background:var(--h-gold);transform:scaleY(1)}.z-home-steps li[data-state=active]:after{transform:scaleY(1)}.z-home-steps li[data-state=active]{background:var(--step-tone)}@supports (color:color-mix(in lab, red, red)){.z-home-steps li[data-state=active]{background:color-mix(in srgb, var(--step-tone) 14%, transparent)}}.z-home-steps li>span{width:24px;color:var(--step-ink);font-family:var(--z-font-display), Fraunces, serif;transform-origin:50%;flex:none;font-size:15px;font-style:italic;transition:transform .35s cubic-bezier(.2,.8,.2,1.3)}.z-home-steps li[data-state=active]>span{transform:scale(1.18)}.z-home-steps li>div{transition:opacity .3s}.z-home-steps li[data-state=upcoming]>div{opacity:.55}.z-home-sheet [data-zone]{border-radius:4px;transition:background-color .3s,box-shadow .3s,transform .3s}.z-home-session[data-step="1"] [data-zone="1"]{background-color:var(--h-gold)}@supports (color:color-mix(in lab, red, red)){.z-home-session[data-step="1"] [data-zone="1"]{background-color:color-mix(in srgb, var(--h-gold) 16%, transparent)}}.z-home-session[data-step="1"] [data-zone="1"]{box-shadow:0 0 0 6px var(--h-gold)}@supports (color:color-mix(in lab, red, red)){.z-home-session[data-step="1"] [data-zone="1"]{box-shadow:0 0 0 6px color-mix(in srgb, var(--h-gold) 16%, transparent)}}.z-home-session[data-step="2"] [data-zone="2"],.z-home-session[data-step="5"] [data-zone="5"]{background-color:var(--h-gold);border-radius:0}@supports (color:color-mix(in lab, red, red)){.z-home-session[data-step="2"] [data-zone="2"],.z-home-session[data-step="5"] [data-zone="5"]{background-color:color-mix(in srgb, var(--h-gold) 16%, transparent)}}.z-home-session[data-step="2"] [data-zone="2"],.z-home-session[data-step="5"] [data-zone="5"]{box-shadow:-8px 0 0 var(--h-gold), 8px 0 0 var(--h-gold)}@supports (color:color-mix(in lab, red, red)){.z-home-session[data-step="2"] [data-zone="2"],.z-home-session[data-step="5"] [data-zone="5"]{box-shadow:-8px 0 0 color-mix(in srgb, var(--h-gold) 16%, transparent), 8px 0 0 color-mix(in srgb, var(--h-gold) 16%, transparent)}}.z-home-session[data-step="3"] [data-zone="3"]{background-color:#b768481a;border-radius:0;box-shadow:-8px 0 #b768481a,8px 0 #b768481a}.z-home-session[data-step="4"] [data-zone="4"]{transform:rotate(0)scale(1.05);box-shadow:0 0 0 3px #b7684838,0 10px 22px -10px #5a2c1a73}.z-home-session[data-step="6"] [data-zone="6"]{background-color:var(--h-sage)}@supports (color:color-mix(in lab, red, red)){.z-home-session[data-step="6"] [data-zone="6"]{background-color:color-mix(in srgb, var(--h-sage) 16%, transparent)}}.z-home-session[data-step="6"] [data-zone="6"]{box-shadow:0 0 0 6px var(--h-sage)}@supports (color:color-mix(in lab, red, red)){.z-home-session[data-step="6"] [data-zone="6"]{box-shadow:0 0 0 6px color-mix(in srgb, var(--h-sage) 16%, transparent)}}@media (prefers-reduced-motion:reduce){.z-home-steps li,.z-home-steps li:after,.z-home-steps li>span,.z-home-steps li>div,.z-home-sheet [data-zone]{transition:none}}.z-home-steps h3{font-size:17px;line-height:1.2}.z-home-steps p{color:var(--h-text-dim);font-size:13.5px;line-height:1.5;margin-top:2px!important}.z-home-step-caption{display:none}@media (max-width:620px){.z-home-session{gap:22px}.z-home-session .z-home-steps{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.z-home-session .z-home-sheet [data-zone]{cursor:pointer;-webkit-tap-highlight-color:transparent}.z-home-sheet .z-home-sheet-n{background:var(--h-paper);border:1px solid #87661f61;border-radius:50%;place-items:center;width:26px;height:26px;font-size:12px;font-style:normal;transition:background-color .3s,color .3s,border-color .3s;display:grid}.z-home-sheet-problem .z-home-sheet-n{top:0}.z-home-sheet-problem .z-home-sheet-n,.z-home-sheet-lines .z-home-sheet-n,.z-home-sheet-skill .z-home-sheet-n{left:-45px}.z-home-session[data-step="1"] [data-zone="1"]>.z-home-sheet-n,.z-home-session[data-step="2"] [data-zone="2"]>.z-home-sheet-n,.z-home-session[data-step="5"] [data-zone="5"]>.z-home-sheet-n{border-color:var(--h-gold);background:var(--h-gold);color:var(--h-gold-on)}.z-home-session[data-step="3"] [data-zone="3"]>.z-home-sheet-n,.z-home-session[data-step="4"] [data-zone="3"]>.z-home-sheet-n{border-color:var(--h-rust);background:var(--h-rust);color:#fff8f0}.z-home-session[data-step="6"] [data-zone="6"]>.z-home-sheet-n{border-color:var(--h-sage-ink);background:var(--h-sage-ink);color:#f6f8f1}.z-home-step-caption{gap:12px;display:grid}.z-home-step-rail{grid-template-columns:repeat(6,minmax(0,1fr));gap:4px;display:grid}.z-home-step-rail i{background:#3c2c141f;border-radius:2px;height:3px;transition:background-color .35s}.z-home-step-rail i[data-state=past],.z-home-step-rail i[data-state=active]{background:var(--h-gold)}.z-home-step-rail i.slip[data-state=active]{background:var(--h-rust)}.z-home-step-rail i.earned[data-state=active]{background:var(--h-sage)}.z-home-step-cards{display:grid}.z-home-step-card{--step-ink:#87661f;opacity:0;visibility:hidden;grid-area:1/1;gap:12px;transition:opacity .3s,visibility 0s linear .3s;display:flex}.z-home-step-card.slip{--step-ink:var(--h-rust-ink)}.z-home-step-card.earned{--step-ink:var(--h-sage-ink)}.z-home-step-card[data-active=true]{opacity:1;visibility:visible;transition:opacity .3s,visibility}.z-home-step-card>span{color:var(--step-ink);font-family:var(--z-font-display), Fraunces, serif;flex:none;font-size:15px;font-style:italic;line-height:1.5}.z-home-step-card strong{color:var(--h-text);font-size:17px;font-weight:600;line-height:1.3;display:block}.z-home-step-card p{color:var(--h-text-dim);font-size:14px;line-height:1.5;margin-top:2px!important}}.z-home-hand{width:fit-content;color:var(--h-hand);font-family:var(--h-font-hand);white-space:nowrap;font-size:18px;line-height:1.3;position:relative}.z-home-slip{color:var(--h-hand);background:#b7684824;padding:0 4px;position:relative}.z-home-wave{width:calc(100% + 4px);height:8px;position:absolute;bottom:-7px;left:-2px;overflow:visible}.z-home-wave path{fill:none;stroke:var(--h-rust);stroke-width:2.2px;stroke-linecap:round}.z-home-struck{opacity:.45;-webkit-text-decoration:line-through #b7684899;text-decoration:line-through #b7684899}.z-home-tick{width:16px;height:16px;color:var(--h-sage-ink)}@media (max-width:960px){.z-home-session{grid-template-columns:1fr}}@media (max-width:620px){.z-home-sheet{background-image:linear-gradient(90deg, transparent 37px, #b7684852 37px, #b7684852 38px, transparent 38px), linear-gradient(var(--h-grid) 1px, transparent 1px), linear-gradient(90deg, var(--h-grid) 1px, transparent 1px);padding:26px 18px 24px 52px}.z-home-sheet-n{font-size:13px;inset-inline-start:8px}.z-home-sheet-problem .z-home-sheet-n,.z-home-sheet-lines .z-home-sheet-n,.z-home-sheet-skill .z-home-sheet-n{left:-44px}.z-home-sheet-lines{font-size:20px}.z-home-sheet-lines p{flex-wrap:wrap;gap:4px 10px}.z-home-sheet .z-home-margin-note{margin-inline-start:0;margin-top:8px;line-height:1.4;transform:rotate(.6deg)}.z-home-sheet-lines .z-home-sheet-slip .z-home-sheet-n{top:18px}}.z-home-ink-pending:not(.is-writing) .z-home-ink{clip-path:inset(-20% 100% -40% 0)}.z-home-ink-pending:not(.is-writing) .z-home-wave path,.z-home-ink-pending:not(.is-writing) .z-home-vg-plot .curve{stroke-dasharray:220;stroke-dashoffset:220px}.z-home-ink-pending:not(.is-writing) .z-home-margin-note,.z-home-ink-pending:not(.is-writing) .z-home-tick,.z-home-ink-pending:not(.is-writing) .z-home-sheet-skill,.z-home-ink-pending:not(.is-writing) .z-home-vg-chip,.z-home-ink-pending:not(.is-writing) .z-home-vg-typeset{opacity:0}.is-writing .z-home-ink{clip-path:inset(-20% 100% -40% 0);animation:.85s cubic-bezier(.55,.1,.35,1) forwards z-nb-write}.is-writing .z-home-sheet .z-home-wave path{stroke-dasharray:120;stroke-dashoffset:120px;animation:.55s 2.3s forwards z-nb-draw}.is-writing .z-home-margin-note,.is-writing .z-home-sheet-skill,.is-writing .z-home-sheet .z-home-tick{animation:.4s forwards z-nb-fade}.is-writing .z-home-sheet .z-home-margin-note{animation-delay:2.6s}.is-writing .z-home-sheet p:first-child .z-home-tick{animation-delay:1s}.is-writing .z-home-sheet p:nth-child(2) .z-home-tick{animation-delay:1.7s}.is-writing .z-home-sheet p:nth-child(5) .z-home-tick{animation-delay:3.9s}.is-writing .z-home-sheet p:nth-child(6) .z-home-tick{animation-delay:4.5s}.is-writing .z-home-sheet-skill{animation-delay:4.8s}.is-writing .z-home-vg-read .z-home-ink{animation-delay:.15s}.is-writing .z-home-vg-typeset,.is-writing .z-home-vg-chip{animation:.45s .7s forwards z-nb-fade}.is-writing .z-home-vg-plot .curve{stroke-dasharray:360;stroke-dashoffset:360px;animation:1.1s .2s forwards z-nb-draw}.z-home-bento{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.z-home-bento>article{border:1px solid var(--h-paper-edge);background:#f7f2e7;border-radius:14px;padding:12px 12px 14px;box-shadow:0 14px 30px -18px #3c2c144d}.z-home-bento .z-home-vignette{border:1px solid var(--h-paper-edge);height:116px;margin-bottom:10px;overflow:hidden}.z-home-bento .z-home-vg-plot svg{max-height:84px}.z-home-bento .z-home-vg-chip{bottom:-2px}.z-home-bento .z-home-vg-ladder{gap:2px;font-size:12.5px}.z-home-bento .z-home-vg-ladder li.locked{margin-top:1px;padding-top:4px}.z-home-bento .z-home-vg-read{gap:4px}.z-home-bento .z-home-vg-sketch{max-height:100px}.z-home-bento-anim{grid-column:span 2;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:20px;display:grid}.z-home-bento-anim .z-home-vignette{height:168px;margin-bottom:0;padding:6px}.z-home-bento-anim h3{margin-top:2px;font-size:22px!important}.z-home-anim svg{width:100%;height:100%;display:block;overflow:visible}.z-home-anim .ground,.z-home-anim .angle{fill:none;stroke:var(--h-hand);stroke-width:1.4px}.z-home-anim .hatch{stroke:var(--h-hand);stroke-width:.8px;opacity:.5}.z-home-anim .trajectory{fill:none;stroke:var(--h-hand);stroke-dasharray:5 6;stroke-width:1.3px;opacity:.55}.z-home-anim .velocity{fill:none;stroke:var(--h-gold-deep);stroke-width:2px}.z-home-anim .peak{stroke:#5c5344;stroke-dasharray:2 4}.z-home-anim text{fill:var(--h-hand);font-family:var(--z-font-display), Fraunces, serif;font-size:15px;font-style:italic}.z-home:lang(ar) .z-home-anim text.quiet{font-family:inherit;font-style:normal}.z-home-anim text.gold{fill:var(--h-gold-deep)}.z-home-anim text.quiet{fill:#5c5344;font-size:14px}.z-home-anim .ball,.z-home-anim .ball-still{fill:var(--h-hand)}.z-home-anim .ball-still{display:none}.z-home-vignette{background-color:var(--h-paper);background-image:linear-gradient(var(--h-grid) 1px, transparent 1px), linear-gradient(90deg, var(--h-grid) 1px, transparent 1px);height:132px;color:var(--h-ink);background-size:18px 18px;border-radius:4px;justify-content:center;align-items:center;padding:14px;display:flex;box-shadow:inset 0 1px #fffaee80,0 1px 2px #00000024}.z-home-vg-read{justify-items:center;gap:8px;width:100%;display:grid}.z-home-vg-read .z-home-hand{font-size:24px}.z-home-vg-rule{width:100%;color:var(--h-ink-dim);align-items:center;gap:10px;font-size:12px;font-weight:600;display:flex}.z-home-vg-rule small{font-size:inherit}.z-home-vg-rule:before,.z-home-vg-rule:after{content:"";border-top:1px dashed #1d191433;flex:1}.z-home-vg-typeset{font-size:19px}.z-home-vg-plot{width:100%;position:relative}.z-home-vg-plot svg{width:100%;height:auto;display:block}.z-home-vg-plot .axis{stroke:#1d191459;stroke-width:1.2px}.z-home-vg-plot .curve{stroke:var(--h-gold-deep);stroke-width:2.2px;stroke-linecap:round}.z-home-vg-plot .dot{fill:var(--h-hand)}.z-home-vg-chip{color:var(--h-sage-ink);inset-inline-end:0;background:#e3eadb;border-radius:5px;align-items:center;gap:5px;padding:3px 9px 3px 6px;font-size:12.5px;font-weight:600;display:inline-flex;position:absolute;bottom:-6px}.z-home-vg-chip .z-home-tick{width:13px;height:13px}.z-home-vg-sketch{max-height:128px}.z-home-vg-ladder{gap:7px;width:100%;margin:0;padding:0;font-size:12.5px;list-style:none;display:grid}.z-home-vg-ladder li{color:var(--h-ink-dim);align-items:center;gap:10px;display:flex}.z-home-vg-ladder i{border:1.5px solid #1d19144d;border-radius:50%;flex:none;width:10px;height:10px}.z-home-vg-ladder li.active{color:var(--h-ink);font-weight:600}.z-home-vg-ladder li.active i{border-color:var(--h-gold-deep);background:var(--h-gold)}.z-home-vg-ladder li.locked{border-top:1px dashed #1d19142e;margin-top:3px;padding-top:8px;font-style:italic}.z-home-vg-ladder li.locked i{border-style:dashed;border-radius:2px}.z-home-bento h3{font-size:17px;line-height:1.2}.z-home-bento p{color:var(--h-text-dim);font-size:13.5px;line-height:1.5;margin-top:4px!important}@media (max-width:1060px){.z-home-bento{grid-template-columns:1fr 1fr}.z-home-bento-anim{grid-column:1/-1}}@media (max-width:620px){.z-home-bento,.z-home-bento-anim{grid-template-columns:1fr}}.z-plan{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);align-items:center;gap:40px 64px;display:grid}.z-plan-copy h2{font-family:var(--z-font-display), Georgia, serif;margin:10px 0 14px;font-size:clamp(30px,3.4vw,44px);font-weight:500;line-height:1.08}.z-plan-copy h2 em{color:var(--h-gold-soft,#dec27b);font-style:italic}.z-plan-copy>p{max-width:46ch;color:var(--h-text-dim);margin:0 0 26px;font-size:16px;line-height:1.65}.z-plan-goals{gap:10px;display:grid}.z-plan-goals button{color:var(--h-text,#eee8dc);font:inherit;text-align:start;cursor:pointer;background:#eee8dc06;border:1px solid #eee8dc14;border-radius:14px;grid-template-columns:44px minmax(0,1fr);align-items:center;gap:14px;padding:10px 16px 10px 10px;transition:border-color .16s,background .16s,transform .16s;display:grid}.z-plan-goals button:hover{border-color:#c69a3859;transform:translate(2px)}:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)) .z-plan-goals button:hover{transform:translate(-2px)}.z-plan-goals button.on{background:linear-gradient(90deg,#c69a3824,#c69a3805);border-color:#c69a3899}:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)) .z-plan-goals button.on{background:linear-gradient(-90deg,#c69a3824,#c69a3805)}.z-plan-goals button:focus-visible{outline:2px solid var(--h-gold,#c69a38);outline-offset:2px}.z-plan-goal-icon{color:#2a2419;width:44px;height:44px;display:grid}.z-plan-goal-icon .z-home-medallion{width:44px;height:44px}.z-plan-goal-text{gap:2px;min-width:0;display:grid}.z-plan-goal-text strong{font-family:var(--z-font-display), Georgia, serif;font-size:17px;font-weight:500}.z-plan-goal-text small{color:var(--h-text-dim);text-overflow:ellipsis;white-space:nowrap;font-size:13px;overflow:hidden}.z-plan-goals button.on .z-plan-goal-text small{color:var(--h-gold-soft,#dec27b)}.z-plan-desk{gap:14px;display:grid;position:relative}.z-plan-card{--plan-ink:#262833;--plan-paper:#f2ecdf;--plan-gold:#c69a38;color:#17150f;background-color:#f2ecdf;background-image:radial-gradient(#4a3a1e17 1px,#0000 1.2px);background-size:20px 20px;border:1px solid #d8cab0;border-radius:18px;padding:26px 28px 0;animation:.6s cubic-bezier(.2,.8,.3,1) both z-plan-card-in;position:relative;transform:rotate(-1deg);box-shadow:0 50px 90px -40px #000000e6,0 18px 30px -18px #0009}.z-plan-stack{position:relative}.z-plan-stack:before{content:"";background:#d9ccb3;border:1px solid #d8cab073;border-radius:18px;position:absolute;inset:12px -8px -12px 14px;transform:rotate(2.4deg);box-shadow:0 30px 60px -30px #000c}.z-plan-card header span{color:#9a7426;letter-spacing:.14em;text-transform:uppercase;font-size:11px;font-weight:650}:lang(ar) .z-plan-card header span{letter-spacing:0}.z-plan-card header h3{color:#17150f;max-width:24ch;font-family:var(--z-font-display), Georgia, serif;margin:6px 0 0;font-size:23px;font-weight:500;line-height:1.2}.z-plan-drawing{width:100%;height:auto;margin-top:6px;display:block;overflow:visible}.z-plan-lines path{fill:none;stroke:#6d6455;stroke-width:1.6px;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1px;animation:1.5s cubic-bezier(.6,.05,.25,1) forwards z-plan-draw}.z-plan-glyph{fill:#f2ecdf;stroke:#9a7426;stroke-width:1.2px}.z-plan-glyph-text{fill:#9a7426;font-family:Times New Roman,Georgia,serif;font-size:16px;font-style:normal}.z-plan-lane{fill:#6d6455;letter-spacing:.14em;text-transform:uppercase;font-size:10.5px;font-weight:650}:lang(ar) .z-plan-lane{letter-spacing:0}.z-plan-label{fill:#17150f;font-family:var(--z-font-display), Georgia, serif;font-size:14px}.z-plan-label.next{fill:#7a5c1c}.z-plan-glow{fill:#c69a3833;transform-box:fill-box;transform-origin:50%;animation:2.6s ease-in-out 1.6s infinite z-plan-breathe}.z-plan-seal .halo{fill:#c69a381a}.z-plan-seal .ring{fill:none;stroke:#c69a38;stroke-width:1.3px;stroke-dasharray:3 4;transform-box:fill-box;transform-origin:50%;animation:30s linear infinite z-plan-spin}.z-plan-seal .plate{fill:#f7f1e4;stroke:#c69a38;stroke-width:1.6px}.z-plan-seal .z-home-medallion .plate{fill:#f7f1e4}.z-plan-seal svg{color:#2a2419}.z-plan-seal-label{fill:#9a7426;letter-spacing:.14em;text-transform:uppercase;font-size:10px;font-weight:650}:lang(ar) .z-plan-seal-label{letter-spacing:0}.z-plan-pop{transform-box:fill-box;transform-origin:50%;animation:.52s cubic-bezier(.2,.9,.3,1.35) both z-plan-pop}.z-plan-fade{animation:.6s both z-plan-fade}.z-plan-list{display:none}.z-plan-card footer{background:#e8dfcfd9;border-top:1px solid #d8cab0;border-radius:0 0 18px 18px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px 24px;margin:8px -28px 0;padding:18px 28px 20px;display:flex}.z-plan-card footer div{flex:240px;gap:3px;min-width:0;display:grid}.z-plan-next-eyebrow{color:#9a7426;letter-spacing:.14em;text-transform:uppercase;align-items:center;gap:7px;font-size:11px;font-weight:650;display:inline-flex}:lang(ar) .z-plan-next-eyebrow{letter-spacing:0}.z-plan-card footer strong{font-family:var(--z-font-display), Georgia, serif;font-size:18px;font-weight:500}.z-plan-card footer p{color:#5f584d;margin:0;font-size:13.5px;line-height:1.5}.z-plan-beyond{color:var(--h-text-dim);flex-wrap:wrap;align-items:center;gap:6px 10px;margin:18px 6px 0;font-size:14px;display:flex}.z-plan-beyond>span{color:var(--h-text,#eee8dc);letter-spacing:.14em;text-transform:uppercase;font-size:11px;font-weight:650}:lang(ar) .z-plan-beyond>span{letter-spacing:0}.z-plan-note{color:var(--h-text-dim);opacity:.75;margin:0 6px;font-size:12.5px}@keyframes z-plan-draw{to{stroke-dashoffset:0}}@keyframes z-plan-pop{0%{opacity:0;transform:scale(.4)}to{opacity:1;transform:scale(1)}}@keyframes z-plan-fade{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}@keyframes z-plan-breathe{0%,to{opacity:.55;transform:scale(.85)}50%{opacity:1;transform:scale(1.18)}}@keyframes z-plan-spin{to{transform:rotate(360deg)}}@keyframes z-plan-card-in{0%{opacity:0;transform:rotate(-1deg)translateY(14px)}to{opacity:1;transform:rotate(-1deg)}}@media (prefers-reduced-motion:reduce){.z-plan-card,.z-plan-pop,.z-plan-fade,.z-plan-glow,.z-plan-seal .ring{animation:none}.z-plan-lines path{stroke-dashoffset:0;animation:none}}@media (max-width:960px){.z-plan{grid-template-columns:minmax(0,1fr)}}@media (max-width:600px){.z-plan-card{padding:22px 20px 0;animation:none;transform:none}.z-plan-stack:before{transform:rotate(1.4deg)}.z-plan-card footer{margin:8px -20px 0;padding:16px 20px 18px}.z-plan-drawing{display:none}.z-plan-list{gap:16px;margin:18px 0 6px;padding:0;list-style:none;display:grid}.z-plan-list>li>span{color:#6d6455;letter-spacing:.14em;text-transform:uppercase;font-size:10.5px;font-weight:650}.z-plan-list ul{gap:8px;margin:8px 0 0;padding:0;list-style:none;display:grid}.z-plan-list ul li{font-family:var(--z-font-display), Georgia, serif;align-items:center;gap:10px;font-size:16px;display:flex}.z-plan-list ul li i{box-sizing:border-box;background:#f2ecdf;border:1.6px solid #262833;border-radius:50%;flex:none;width:14px;height:14px}.z-plan-list ul li.solved i{background:#262833}.z-plan-list ul li.helped i{background:radial-gradient(circle,#262833 0 2.6px,#f2ecdf 3px)}.z-plan-list ul li.in_progress i{background:linear-gradient(90deg,#262833 50%,#f2ecdf 50%)}.z-plan-list ul li.next{color:#7a5c1c}.z-plan-list ul li.next i{border-color:#c69a38;box-shadow:0 0 0 4px #c69a3833}}.z-home-medallion{--medallion-plate:#efe4cc;color:#2b2418;width:100%;height:100%;display:block}.z-home-medallion .plate{fill:var(--medallion-plate)}.z-home-medallion .rim{stroke:#b08d45;stroke-width:1px;stroke-dasharray:1.5 2.2}.z-home-medallion .rays{stroke:#c69a38;stroke-width:.9px;opacity:.35}.z-home-medallion .ink{stroke:currentColor;stroke-width:1.7px}.z-home-medallion .gold{fill:#d4a854}.z-home-sr{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;margin:0;padding:0;position:absolute;overflow:hidden}.z-home-shelf .z-home-head h2 em{color:var(--h-gold-soft);font-style:italic}.z-home:lang(ar) .z-home-shelf .z-home-head h2 em{font-style:normal}.z-home-shelf-row{border-bottom:6px solid var(--z-desk-panel-raised);box-shadow:0 10px 0 -4px var(--h-desk);grid-template-columns:repeat(4,minmax(0,1fr));align-items:end;gap:22px;margin:0;padding:0 0 14px;list-style:none;display:grid}.z-home-book{--book-spine-width:32px;isolation:isolate;aspect-ratio:3/4;box-sizing:border-box;min-height:0;padding:14px 16px 18px calc(var(--book-spine-width) + 16px);background:repeating-linear-gradient(45deg, var(--h-paper) 0 2px, transparent 2px 4px), var(--cloth);border-radius:2px 3px 3px 2px;flex-direction:column;display:flex;position:relative}@supports (color:color-mix(in lab, red, red)){.z-home-book{background:repeating-linear-gradient(45deg, color-mix(in srgb, var(--h-paper) 2.5%, transparent) 0 2px, transparent 2px 4px), var(--cloth)}}.z-home-book{color:var(--h-paper);box-shadow:inset 0 1px 0 var(--h-paper), inset 0 -3px 0 var(--h-desk), 0 18px 24px -10px var(--h-night)}@supports (color:color-mix(in lab, red, red)){.z-home-book{box-shadow:inset 0 1px 0 color-mix(in srgb, var(--h-paper) 20%, transparent), inset 0 -3px 0 color-mix(in srgb, var(--h-desk) 45%, transparent), 0 18px 24px -10px color-mix(in srgb, var(--h-night) 85%, transparent)}}.z-home-book{transition:translate .25s}[dir=rtl] .z-home-book{padding:14px calc(var(--book-spine-width) + 16px) 18px 16px;border-radius:3px 2px 2px 3px}.z-home-book:hover{translate:0 -6px}.z-home-book-spine{width:var(--book-spine-width);background:linear-gradient(90deg, var(--cloth), var(--cloth) 30%, var(--cloth) 65%, var(--cloth));border-radius:2px 0 0 2px;position:absolute;inset-block:0;inset-inline-start:0}@supports (color:color-mix(in lab, red, red)){.z-home-book-spine{background:linear-gradient(90deg, color-mix(in srgb, var(--cloth) 40%, var(--h-night)), color-mix(in srgb, var(--cloth) 85%, var(--h-paper)) 30%, var(--cloth) 65%, color-mix(in srgb, var(--cloth) 55%, var(--h-night)))}}.z-home-book-spine{box-shadow:inset -1px 0 0 var(--h-paper), 3px 0 4px var(--h-night)}@supports (color:color-mix(in lab, red, red)){.z-home-book-spine{box-shadow:inset -1px 0 0 color-mix(in srgb, var(--h-paper) 20%, transparent), 3px 0 4px color-mix(in srgb, var(--h-night) 35%, transparent)}}[dir=rtl] .z-home-book-spine{background:linear-gradient(270deg, var(--cloth), var(--cloth) 30%, var(--cloth) 65%, var(--cloth));border-radius:0 2px 2px 0}@supports (color:color-mix(in lab, red, red)){[dir=rtl] .z-home-book-spine{background:linear-gradient(270deg, color-mix(in srgb, var(--cloth) 40%, var(--h-night)), color-mix(in srgb, var(--cloth) 85%, var(--h-paper)) 30%, var(--cloth) 65%, color-mix(in srgb, var(--cloth) 55%, var(--h-night)))}}[dir=rtl] .z-home-book-spine{box-shadow:inset 1px 0 0 var(--h-paper), -3px 0 4px var(--h-night)}@supports (color:color-mix(in lab, red, red)){[dir=rtl] .z-home-book-spine{box-shadow:inset 1px 0 0 color-mix(in srgb, var(--h-paper) 20%, transparent), -3px 0 4px color-mix(in srgb, var(--h-night) 35%, transparent)}}.z-home-book-spine span{white-space:nowrap;font-family:var(--z-font-display);letter-spacing:.04em;color:var(--h-gold-soft);font-size:13px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)rotate(-90deg)}[dir=rtl] .z-home-book-spine span{letter-spacing:0;transform:translate(-50%,-50%)rotate(90deg)}.z-home-book-spine:before,.z-home-book-spine:after{content:"";border-block:1px solid var(--h-gold-soft);height:4px;position:absolute;inset-inline:6px}@supports (color:color-mix(in lab, red, red)){.z-home-book-spine:before,.z-home-book-spine:after{border-block:1px solid color-mix(in srgb, var(--h-gold-soft) 65%, transparent)}}.z-home-book-spine:before{top:26px}.z-home-book-spine:after{bottom:26px}.z-home-book:before{content:"";border-inline-start:1px solid var(--h-night);width:3px;position:absolute;inset-block:2px 3px;inset-inline-start:calc(var(--book-spine-width) + 5px)}@supports (color:color-mix(in lab, red, red)){.z-home-book:before{border-inline-start:1px solid color-mix(in srgb, var(--h-night) 45%, transparent)}}.z-home-book:before{border-inline-end:1px solid var(--h-paper)}@supports (color:color-mix(in lab, red, red)){.z-home-book:before{border-inline-end:1px solid color-mix(in srgb, var(--h-paper) 10%, transparent)}}.z-home-book:before{pointer-events:none}.z-home-book:after{content:"";z-index:-1;border-inline-end:1px solid var(--h-paper-edge);background:repeating-linear-gradient(0deg, var(--h-paper-edge) 0 1px, var(--h-paper-2) 1px 3px);width:8px;box-shadow:2px 2px 3px var(--h-night);position:absolute;inset-block:5px 6px;inset-inline-end:-6px}@supports (color:color-mix(in lab, red, red)){.z-home-book:after{box-shadow:2px 2px 3px color-mix(in srgb, var(--h-night) 55%, transparent)}}.z-home-book:after{pointer-events:none}[dir=rtl] .z-home-book:after{box-shadow:-2px 2px 3px var(--h-night)}@supports (color:color-mix(in lab, red, red)){[dir=rtl] .z-home-book:after{box-shadow:-2px 2px 3px color-mix(in srgb, var(--h-night) 55%, transparent)}}.z-home-book-plate{aspect-ratio:5/4;background:var(--h-desk-2);box-shadow:0 0 0 1px var(--z-desk-border-strong);border-radius:2px;flex-shrink:0;position:relative;overflow:hidden}.z-home-book-art{object-fit:cover;width:100%;height:100%;display:block}.z-home-book h3{min-height:2.24em;color:var(--h-paper);margin-top:16px;font-size:22px;line-height:1.12}.z-home-book p{min-height:3em;color:var(--h-paper);margin:6px 0 14px!important}@supports (color:color-mix(in lab, red, red)){.z-home-book p{color:color-mix(in srgb, var(--h-paper) 72%, transparent)}}.z-home-book p{font-size:13px;line-height:1.5}.z-home-book strong{color:var(--h-gold-soft);align-items:center;gap:8px;margin-top:auto;font-size:14px;font-weight:600;display:flex}.z-home-book strong em{background:var(--h-paper-2);color:var(--h-ink);border-radius:999px;padding:2px 8px;font-size:12px;font-style:normal}@media (max-width:1200px){.z-home-shelf-row{grid-template-columns:1fr 1fr}.z-home-book{justify-self:center;width:min(100%,268px)}}@media (max-width:640px){.z-home-shelf-row{overscroll-behavior-x:contain;scroll-snap-type:x mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch;gap:14px;margin-inline:-20px;padding-block-start:8px;padding-inline:20px;scroll-padding-inline:20px;display:flex;overflow-x:auto}.z-home-shelf-row::-webkit-scrollbar{display:none}.z-home-shelf-row>li{scroll-snap-align:start;flex:0 0 min(62vw,240px);animation:none}.z-home-shelf-row .z-home-book{width:100%}}@media (max-width:520px){.z-home-shelf-row{gap:12px}.z-home-book{--book-spine-width:22px;padding:10px 9px 14px calc(var(--book-spine-width) + 10px)}[dir=rtl] .z-home-book{padding:10px calc(var(--book-spine-width) + 10px) 14px 9px}.z-home-book-spine span{font-size:12px}.z-home-book-spine:before,.z-home-book-spine:after{inset-inline:4px}.z-home-book:after{width:5px;inset-inline-end:-4px}.z-home-book h3{margin-top:10px;font-size:17px}.z-home-book p{font-size:12px;margin:4px 0 10px!important}.z-home-book strong{flex-wrap:wrap;gap:6px;font-size:12.5px}}.z-home-faq{border-top:1px solid var(--h-line-strong);border-bottom:1px solid var(--h-line-strong);text-align:start;width:100%;max-width:760px;margin-top:32px}.z-home-faq>summary{cursor:pointer;color:var(--h-text);font-family:var(--z-font-display), Fraunces, serif;justify-content:space-between;align-items:center;gap:16px;padding:18px 6px;font-size:21px;list-style:none;display:flex}.z-home:lang(ar) .z-home-faq>summary{font-family:inherit;font-weight:600}.z-home-faq>summary::-webkit-details-marker{display:none}.z-home-faq>summary:after{content:"+";color:var(--h-gold)}.z-home-faq[open]>summary:after{content:"–"}.z-home-faq summary:focus-visible{outline:2px solid var(--h-gold);outline-offset:2px}.z-home-faq-contact{color:var(--h-text-dim);padding:18px 6px;font-size:14px}.z-home-faq-contact a{color:var(--h-gold);text-underline-offset:3px;text-decoration:underline}.z-home-faq-list{border-top:1px solid var(--h-line-strong)}.z-home-faq-item{border-bottom:1px solid var(--h-line-strong)}.z-home-faq-item summary{cursor:pointer;font-family:var(--z-font-display), Fraunces, serif;color:var(--h-text);justify-content:space-between;align-items:center;gap:16px;padding:13px 6px;font-size:17px;line-height:1.3;list-style:none;display:flex}.z-home:lang(ar) .z-home-faq-item summary{font-family:inherit;font-weight:600}.z-home-faq-item summary::-webkit-details-marker{display:none}.z-home-faq-item summary:after{content:"+";color:#87661f;font-family:var(--z-font-display), Fraunces, serif;flex:none;font-size:22px;line-height:1}.z-home-faq-item[open] summary:after{content:"–"}.z-home-faq-item p{max-width:640px;color:var(--h-text-dim);padding:0 6px 20px;font-size:15.5px;line-height:1.65}.z-home-faq-item a{color:#87661f;text-underline-offset:3px;text-decoration:underline}.z-home-faq-item a:hover{color:var(--h-text)}.z-home-cta{text-align:center;padding:56px 0}.z-home-cta .z-home-wrap{flex-direction:column;align-items:center;display:flex}.z-home-cta-mark{width:20px;height:46px;color:var(--h-gold);margin-bottom:16px;display:block}.z-home-cta-mark .z-hand-integral{width:100%;height:100%;transform:none}.z-home-cta h2{letter-spacing:-.02em;font-size:clamp(26px,3vw,36px);line-height:1.08}.z-home:lang(ar) .z-home-cta h2{line-height:1.3}.z-home-cta-copy>p{max-width:560px;color:var(--h-text-dim);font-size:17px;line-height:1.6;margin-top:14px!important}.z-home-cta .z-home-hero-actions{justify-content:center;margin-top:26px}.z-home-cta .z-home-hero-detail{margin-top:16px}.z-home-cta:not(.z-home-paper){background:var(--h-desk);text-align:start;padding:32px 0 0}.z-home-cta:not(.z-home-paper) .z-home-wrap{grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:18px 40px;display:grid}.z-home-cta:not(.z-home-paper) .z-home-cta-mark{margin:0;width:22px;height:52px;margin-inline-end:-22px}.z-home-cta:not(.z-home-paper) h2{font-size:24px}.z-home-cta:not(.z-home-paper) .z-home-cta-copy>p{max-width:520px;font-size:14.5px;line-height:1.55;margin-top:6px!important}.z-home-cta:not(.z-home-paper) .z-home-cta-act{flex-direction:column;align-items:flex-end;gap:8px;display:flex}.z-home-cta:not(.z-home-paper) .z-home-hero-actions,.z-home-cta:not(.z-home-paper) .z-home-hero-detail{margin-top:0}.z-home-cta:not(.z-home-paper) .z-home-faq{grid-column:1/-1;max-width:none;margin-top:4px}.z-home-cta:not(.z-home-paper) .z-home-faq>summary{padding:12px 2px;font-size:17px}@media (max-width:720px){.z-home-cta:not(.z-home-paper) .z-home-wrap{grid-template-columns:auto minmax(0,1fr)}.z-home-cta:not(.z-home-paper) .z-home-cta-act{grid-column:1/-1;align-items:flex-start}.z-home-section{padding:48px 0}.z-home-hero{padding:32px 0 40px}.z-home-head{margin-bottom:22px}}@media (prefers-reduced-motion:reduce){.z-home *,.z-home :before,.z-home :after{transition:none!important;animation:none!important}.z-nb-ink{clip-path:none}.z-nb-tick,.z-nb-slip:before,.z-nb-hint,.z-nb-status-flagged,.z-nb-status-count,.z-nb-foot-partial{opacity:1}.z-nb-slip path,.z-tb-loop path{stroke-dashoffset:0}.z-home-ink,.z-home-ink-pending:not(.is-writing) .z-home-ink{clip-path:none}.z-home-wave path,.z-home-vg-plot .curve{stroke-dashoffset:0}.z-home-margin-note,.z-home-tick,.z-home-sheet-skill,.z-home-vg-chip,.z-home-vg-typeset{opacity:1}.z-home-anim .ball{display:none}.z-home-anim .ball-still{display:inline}}.z-home-universities{border-top:1px solid var(--h-line);padding:14px 0 16px}.z-home-universities-heading{justify-content:center;align-items:center;gap:8px;margin-bottom:10px;display:flex}.z-home-universities-heading h2{color:var(--h-text-dim);font:500 12px/1.5 var(--z-font-sans), sans-serif;margin:0}.z-home-universities-toggle{border:1px solid var(--h-line-strong);width:32px;height:32px;color:var(--h-text-dim);cursor:pointer;background:0 0;border-radius:6px;place-items:center;padding:4px;display:grid}.z-home-universities-toggle svg{width:11px;height:11px}.z-home-universities-toggle:hover{color:var(--h-gold-soft)}:is(.z-home-universities-toggle:focus-visible,.z-home-universities-window:focus-visible){outline:2px solid var(--h-gold);outline-offset:4px}.z-home-universities-window{direction:ltr;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#0000,#000 4% 96%,#0000);mask-image:linear-gradient(90deg,#0000,#000 4% 96%,#0000)}.z-home-universities-track{width:max-content;animation:55s linear infinite z-universities-scroll;display:flex}.z-home-universities-track.is-paused,.z-home-universities-window:hover .z-home-universities-track,.z-home-universities-window:focus-within .z-home-universities-track{animation-play-state:paused}.z-home-universities-list{margin:0;padding:0;list-style:none;display:flex}.z-home-universities-list li{text-align:center;flex-direction:column;justify-content:flex-start;align-items:center;gap:8px;width:168px;padding:0 20px;display:flex}.z-home-universities-list img{object-fit:contain;filter:brightness(0)invert();opacity:.78;width:116px;height:28px}@media (max-width:620px){.z-home-universities-list li{width:184px}.z-home-universities-list img{width:144px;height:36px}}.z-home-universities-list span{max-width:128px;color:var(--h-text-dim);font-size:10px;line-height:1.5}@keyframes z-universities-scroll{to{transform:translate(-50%)}}@media (prefers-reduced-motion:reduce){.z-home-universities-track{animation:none}.z-home-universities-toggle,.z-home-universities-list[aria-hidden=true]{display:none}.z-home-universities-window{overflow-x:auto;-webkit-mask-image:none;mask-image:none}}.z-home .z-home-hero-actions button.z-home-btn{font:inherit;cursor:pointer;border:0}.z-nb-bar{border-bottom:1px solid var(--h-line);justify-content:space-between;align-items:center;gap:12px;min-height:44px;padding:6px 10px 6px 16px;display:flex}.z-nb-bar-title{color:var(--h-text-faint);letter-spacing:.02em;text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.z-nb-tools{border:1px solid var(--h-line);background:var(--h-desk-2);border-radius:10px;flex:none;align-items:center;gap:2px;padding:3px;display:flex}.z-nb-tools-rule{background:var(--h-line);width:1px;height:18px;margin:0 3px}.z-nb-tool{min-width:32px;height:30px;color:var(--h-text-dim);font:inherit;cursor:pointer;background:0 0;border:1px solid #0000;border-radius:7px;justify-content:center;align-items:center;gap:6px;padding:0 7px;font-size:12px;transition:color .15s,background .15s,border-color .15s;display:inline-flex}.z-nb-tool svg{fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.6px;width:17px;height:17px}.z-nb-tool:hover:not(:disabled){color:var(--h-text);background:var(--h-desk-3)}.z-nb-tool:disabled{opacity:.35;cursor:default}.z-nb-tool:focus-visible{outline:2px solid var(--h-gold-soft);outline-offset:1px}.z-nb-tool.on{background:var(--h-gold-wash);color:var(--h-gold);border-color:#c69a3880}.z-nb-tool.call{border-color:var(--h-gold);color:var(--h-gold);animation:1.6s ease-in-out 3 z-nb-call}@keyframes z-nb-call{50%{box-shadow:0 0 0 5px color-mix(in srgb, var(--h-gold) 22%, transparent)}}.z-nb-tool-done{display:none}@media (pointer:coarse){.z-nb-tool{min-width:38px;height:36px}.z-nb-tool.pen.on .z-nb-tool-done{display:inline}}.z-nb-line.yours{margin-top:6px;display:block}.z-nb-write{height:110px;position:relative}.z-nb-write-tick{padding-left:12px;position:absolute;top:18px}.z-nb-write-tick .z-nb-tick{opacity:1;animation:none}.z-nb-canvas{width:100%;height:100%;color:var(--h-hand);touch-action:pan-y;position:absolute;inset:0}.z-nb.ready .z-nb-canvas{cursor:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M3 21l1.2-4.6L16.6 4a2 2 0 0 1 2.8 0l.6.6a2 2 0 0 1 0 2.8L7.6 19.8z' fill='%23f3ecdc' stroke='%231c1913' stroke-width='1.6' stroke-linejoin='round'/%3E%3Cpath d='M14.5 6.1l3.4 3.4' stroke='%231c1913' stroke-width='1.6'/%3E%3Cpath d='M3 21l1.2-4.6 3.4 3.4z' fill='%231c1913'/%3E%3C/svg%3E") 3 21,crosshair}.z-nb.ready .z-nb-canvas.eraser{cursor:cell}.z-nb-canvas.armed{touch-action:none}.z-nb-write-cue{color:var(--h-ink-dim);font-family:var(--z-font-display), Fraunces, serif;pointer-events:none;opacity:0;align-items:center;gap:10px;font-size:15px;font-style:italic;transition:opacity .3s;display:inline-flex;position:absolute;top:12px;left:0}.z-home:lang(ar) .z-nb-write-cue{font-family:inherit;font-style:normal}.z-nb-write-cue i{background:var(--h-gold);border-radius:1px;width:2px;height:28px;animation:1.1s step-end infinite z-nb-caret}@keyframes z-nb-caret{50%{opacity:0}}.z-nb.ready .z-nb-write-cue{opacity:1}.z-nb .z-nb-line.inked .z-nb-write-cue{opacity:0}.z-nb-turn{opacity:0;pointer-events:none;gap:8px;transition:opacity .35s;display:grid}.z-nb.ready .z-nb-turn{opacity:1;pointer-events:auto}.z-nb-turn p{color:var(--h-text-faint);margin:0;font-size:11.5px;line-height:1.45}.z-nb-turn .z-nb-turn-error{color:#e2a387}.z-nb-check{border:1px solid var(--h-gold);background:var(--h-gold);color:var(--h-gold-on);font:inherit;cursor:pointer;border-radius:8px;padding:10px 12px;font-size:13.5px;font-weight:600;transition:background .15s,opacity .15s}.z-nb-check:hover:not(:disabled){background:var(--h-gold-soft)}.z-nb-check:disabled{opacity:.45;cursor:default}.z-nb-check.quiet{color:var(--h-gold);background:0 0}.z-nb-check.quiet:hover{background:var(--h-gold-wash)}.z-nb-check:focus-visible{outline:2px solid var(--h-gold-soft);outline-offset:2px}.z-nb-hint.z-nb-reply{opacity:1;animation:none}.z-nb-reply-body{background:var(--h-desk-2);border:1px solid var(--h-line);border-inline-start:2px solid var(--h-gold);color:var(--h-text);border-radius:8px;padding:10px 12px;font-size:13.5px;line-height:1.5}.z-nb-reply.verified .z-nb-reply-body{border-inline-start-color:var(--h-sage)}.z-nb-reply.issue .z-nb-reply-body{border-inline-start-color:var(--h-rust)}.z-nb-hint .z-nb-reply-body p{font-family:inherit;font-size:inherit;background:0 0;border:0;margin:0 0 6px;padding:0}.z-nb-reply-body p:last-child{margin-bottom:0}.z-nb-turnstile:empty{display:none}.z-nb.skip *,.z-nb.skip :before{animation-duration:.01ms!important;animation-delay:0s!important}.z-nb.skip .z-nb-write-cue i{animation:1.1s step-end infinite z-nb-caret!important}.z-nb.skip .z-nb-tool.call{animation:1.6s ease-in-out 3 z-nb-call!important}@media (max-width:760px){.z-nb-bar{padding-inline-start:12px}.z-nb-write{height:96px}}@media (prefers-reduced-motion:reduce){.z-nb-write-cue i,.z-nb-tool.call{animation:none!important}}.z-study-guide{width:min(100% - 40px,880px);margin:0 auto;padding:clamp(70px,9vw,120px) 0 100px}.z-study-guide-head{max-width:750px;margin-bottom:52px}.z-study-guide h1,.z-study-guide h2{font-family:var(--z-font-display);letter-spacing:-.025em;font-weight:480}.z-study-guide h1{color:var(--z-theme-text-primary);margin:16px 0 24px;font-size:clamp(42px,6vw,70px);line-height:1.08}.z-study-guide-head>p:last-child{color:var(--z-theme-text-secondary);font-size:clamp(18px,2vw,22px);line-height:1.65}.z-study-guide-paper{background:var(--z-desk-paper,#f2ecdf);color:var(--z-desk-ink-text);border-radius:10px;padding:clamp(24px,5vw,52px)}.z-study-guide-paper section{border-bottom:1px solid var(--z-desk-ink);grid-template-columns:52px minmax(0,1fr);gap:20px;padding:25px 0;display:grid}@supports (color:color-mix(in lab, red, red)){.z-study-guide-paper section{border-bottom:1px solid color-mix(in srgb, var(--z-desk-ink) 14%, transparent)}}.z-study-guide-paper section:first-child{padding-top:0}.z-study-guide-paper section:last-child{border-bottom:0;padding-bottom:0}.z-study-guide-number{color:var(--z-desk-ink-muted,#756d60);font-family:var(--z-font-mono);padding-top:8px;font-size:13px}.z-study-guide-paper h2{margin:0 0 12px;font-size:clamp(24px,3vw,32px)}.z-study-guide-paper p{color:var(--z-desk-ink-soft,#4d473d);margin:0;line-height:1.75}.z-study-guide-note{border-bottom:1px solid var(--z-theme-header-border);padding:40px 0}.z-study-guide-note h2{color:var(--z-theme-text-primary);margin:0 0 12px;font-size:clamp(25px,3vw,34px)}.z-study-guide-note p{color:var(--z-theme-text-secondary);margin:0;line-height:1.75}.z-study-guide-end{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px;margin-top:42px;display:flex}.z-study-guide-end>a:first-child{color:var(--z-theme-text-primary);text-underline-offset:4px;max-width:440px;text-decoration:underline}.z-study-guide-cta{background:var(--z-clay);min-height:48px;color:var(--z-primary-on);border-radius:8px;justify-content:center;align-items:center;padding:12px 22px;font-weight:700;display:inline-flex}.z-study-guide-cta:hover{background:var(--z-clay-bright)}@media (max-width:600px){.z-study-guide-paper section{grid-template-columns:1fr;gap:4px}}.z-topic-crumbs{color:var(--z-theme-text-secondary);flex-wrap:wrap;gap:8px;margin-bottom:8px;font-size:14px;display:flex}.z-topic-crumbs a{color:var(--z-clay)}.z-topic-paper-title{margin:0 0 20px;font-size:clamp(22px,2.6vw,28px)}.z-topic-problems{border-bottom:1px solid var(--z-theme-header-border);padding:40px 0}.z-topic-problems>h2,.z-topic-related h2,.z-topic-hub-group h2,.z-topic-sources h2{color:var(--z-theme-text-primary);margin:0 0 12px;font-size:clamp(25px,3vw,34px)}.z-topic-problems>p{color:var(--z-theme-text-secondary);max-width:720px;margin:0 0 24px;line-height:1.75}.z-topic-problems ol{gap:16px;margin:0;padding:0;list-style:none;display:grid}.z-topic-problem{background:var(--z-desk-paper,#f2ecdf);color:var(--z-desk-ink-text);border-radius:10px;gap:14px;padding:20px 22px;display:grid}.z-topic-problem header{font-family:var(--z-font-mono);color:var(--z-desk-ink-muted,#756d60);flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:13px;display:flex}.z-topic-problem-statement{padding-block:4px;font-size:18px;line-height:1.7;overflow:auto hidden}.z-topic-problem .z-study-guide-cta{justify-self:start;min-height:44px;padding:10px 18px}.z-topic-related{padding:40px 0 0}.z-topic-related ul,.z-topic-hub-group ul,.z-topic-sources ul{gap:10px;margin:0;padding:0;list-style:none;display:grid}.z-topic-related a{color:var(--z-theme-text-primary);text-underline-offset:4px;text-decoration:underline}.z-topic-hub-group{border-bottom:1px solid var(--z-theme-header-border);padding:32px 0}.z-topic-hub-group ul{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}.z-topic-hub-group a{border:1px solid var(--z-theme-header-border);height:100%;color:var(--z-theme-text-primary);border-radius:10px;gap:6px;padding:16px 18px;display:grid}.z-topic-hub-group a:hover{border-color:var(--z-clay)}.z-topic-hub-group a span{color:var(--z-theme-text-secondary);font-size:14px}.z-topic-sources{color:var(--z-theme-text-secondary);padding:40px 0 0;font-size:14px;line-height:1.7}.z-topic-sources h2{font-size:18px}.z-topic-sources a{color:inherit;text-decoration:underline}.z-chat-v2>.z-chat-composer-wrap{width:min(980px,100% - 36px);margin-inline:auto;background:0 0!important}.z-chat-composer.z-chat-v2-composer{border:1px solid #3f3f3f;border-radius:24px;min-height:132px;padding:18px 20px 16px;box-shadow:0 18px 38px #00000038;background:var(--z-console-input)!important}.z-chat-v2-composer{grid-template-rows:auto minmax(54px,auto) auto;display:grid}.z-chat-v2-composer-context{gap:10px;display:grid}.z-chat-v2-input{min-height:54px;max-height:128px;padding:0;font-size:19px;line-height:1.45;color:#ececec!important}.z-chat-v2-input::placeholder{color:#858585!important}.z-chat-v2-footer,.z-chat-v2-footer-start,.z-chat-v2-actions,.z-composer-action-cluster{align-items:center;gap:10px}.z-chat-composer-upload,.z-chat-v2-cancel{border:1px solid #383838;border-radius:999px;min-height:38px;font-size:14px;font-weight:650;color:#d7d7d7!important;background:#242424!important}.z-chat-v2-attach{width:38px;min-height:38px;padding:0}.z-chat-v2-send{text-indent:-999px;width:42px;min-width:42px;height:42px;box-shadow:none;border-radius:999px;padding:0;position:relative;overflow:hidden;color:#111!important;background:#d8d8d8!important;border:0!important}.z-chat-v2-send:before{content:"";border-block-start:2px solid;border-inline-end:2px solid;width:14px;height:14px;position:absolute;inset:50% auto auto 50%;transform:translate(-58%,-50%)rotate(45deg)}.z-chat-v2-send:after{content:"";background:currentColor;border-radius:999px;width:17px;height:2px;position:absolute;inset-block-start:50%;inset-inline-start:50%;transform:translate(-62%,-50%)}.z-chat-v2-send:disabled{opacity:1;color:#8f8f8f!important;background:#3a3a3a!important}.z-pdf-sticky-card:not(.focus){border-radius:8px}.z-pdf-sticky-card.composer:not(.focus){width:min(360px,100% - 28px);max-width:360px}.z-pdf-sticky-work-area,.z-pdf-sticky-canvas-shell{min-width:0;min-height:0}.z-pdf-sticky-card:not(.focus) .z-pdf-sticky-work-area{display:contents}.z-pdf-sticky-canvas-shell{position:relative}.z-pdf-sticky-canvas-prompt{z-index:2;max-width:calc(100% - 108px);color:var(--z-console-focus-text);position:absolute;inset-block-start:34px;inset-inline-start:54px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-canvas-prompt{color:color-mix(in srgb, var(--z-console-focus-text) 30%, transparent)}}.z-pdf-sticky-canvas-prompt{font-family:var(--z-font-hand), var(--z-font-display), serif;pointer-events:none;font-size:clamp(18px,2vw,28px);font-weight:650;line-height:1.25}.z-pdf-sticky-card.composer.focus,.z-pdf-sticky-card.composer.focus:hover,.z-pdf-sticky-card.composer.focus:focus-within,.z-pdf-sticky-card.composer.focus *{-webkit-touch-callout:none;-webkit-user-drag:none}.z-pdf-sticky-card.composer.focus,.z-pdf-sticky-card.composer.focus:hover,.z-pdf-sticky-card.composer.focus:focus-within{--z-sticky-paper:var(--z-console-focus-panel);--z-sticky-paper-deep:var(--z-console-focus-bg);--z-sticky-ink:var(--z-console-focus-text);--z-sticky-muted:var(--z-console-focus-muted);width:100%;min-width:0;height:100%;min-height:0;box-shadow:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;background:0 0;border:0;border-radius:22px;grid-template-rows:auto auto minmax(0,1fr);gap:12px;padding:0;display:grid;overflow:hidden}.z-pdf-sticky-card.composer.focus.no-source{grid-template-rows:auto minmax(0,1fr)}.z-pdf-sticky-card.composer.focus>header{border:0;border-bottom:1px solid var(--z-console-focus-border);min-height:48px;box-shadow:none;background:0 0;border-radius:0;align-items:center;padding:2px 2px 10px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-heading{gap:4px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-heading strong{color:var(--z-console-focus-text);font-family:var(--z-font-display), var(--z-font-sans), serif;letter-spacing:-.015em;font-size:clamp(15px,1.2vw,18px)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-heading span{color:var(--z-console-focus-muted);font-family:var(--z-font-mono), monospace;letter-spacing:.07em;text-transform:uppercase;font-size:9px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-header-actions{flex-wrap:nowrap;gap:8px;max-width:none}.z-pdf-sticky-card.composer.focus header button{border-color:var(--z-console-focus-border);width:34px;min-width:34px;height:34px;color:var(--z-console-focus-muted);background:0 0;border-radius:10px}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-header-command{white-space:nowrap;gap:7px;width:auto;min-width:0;padding-inline:12px;font-size:11px;font-weight:800;display:inline-flex}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-header-command.primary{border-color:var(--z-console-accent-border);background:var(--z-console-accent);color:var(--z-console-accent-on)}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-header-command.primary:hover{border-color:var(--z-console-accent);background:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-header-command.primary:hover{background:color-mix(in srgb, var(--z-console-accent) 88%, black)}}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-header-command.primary:hover{color:var(--z-console-accent-on)}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile{touch-action:manipulation;border-color:var(--z-desk-border-strong);background:var(--z-desk-charcoal);width:8.5rem;min-width:0;height:auto;min-height:44px;box-shadow:none;color:var(--z-desk-text);border-radius:14px;flex:none;grid-template-columns:auto minmax(0,1fr);place-items:center start;gap:0 12px;padding-block:2px;padding-inline:10px 12px;position:static;translate:none}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile>span:first-child{grid-row:1/3;margin:0}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile>:nth-child(2):last-child{grid-row:1/3;align-self:center}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile:hover,.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile:active{background:var(--z-desk-charcoal);color:var(--z-desk-text)}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile:hover:not([aria-disabled=true]){border-color:#eee8dc4d}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile>span>svg[data-state]{width:38px;height:38px}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile>span>span>svg{width:12px;height:12px}.z-pdf-sticky-card header button.z-pdf-sticky-tutor-tile[aria-disabled=true]{opacity:1;cursor:default}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-archive-command{color:var(--z-console-focus-muted);border-color:#0000}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-archive-command:hover{border-color:var(--z-console-danger)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-archive-command:hover{border-color:color-mix(in srgb, var(--z-console-danger) 28%, var(--z-console-focus-border))}}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-archive-command:hover{background:var(--z-console-danger)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-archive-command:hover{background:color-mix(in srgb, var(--z-console-danger) 7%, transparent)}}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-archive-command:hover{color:var(--z-console-danger)}.z-pdf-sticky-card.composer.focus header button:hover{border-color:var(--z-console-focus-border-strong);color:var(--z-console-focus-text);background:#20211f0e}.z-pdf-sticky-card.composer.focus header button svg{width:15px;height:15px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source{border:0;border-bottom:1px solid var(--z-console-focus-border);min-height:164px;max-height:284px;box-shadow:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;background:0 0;border-radius:0;grid-template-columns:minmax(112px,.14fr) minmax(0,1fr);align-content:center;gap:18px;padding:2px 2px 14px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source>span:first-child{color:var(--z-console-focus-muted);letter-spacing:.13em;align-self:center;font-size:9px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source p{font-size:clamp(30px,3vw,44px);color:var(--z-console-focus-text)!important}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content *{-webkit-touch-callout:none;-webkit-user-drag:none;-webkit-user-select:none;user-select:none}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content{overflow-wrap:anywhere;max-width:100%;font-weight:650;line-height:1.55;font-size:clamp(22px,2vw,32px)!important}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content .katex,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content .katex *{color:var(--z-console-focus-text)!important}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-work-area{touch-action:pan-x pan-y;border:1px solid var(--z-console-focus-border);background:var(--z-console-focus-paper);min-height:0;box-shadow:0 1px 0 #ffffffb8 inset, 0 14px 32px var(--z-console-focus-text);border-radius:16px;flex-direction:column;align-items:stretch;display:flex;position:relative;overflow:auto}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-work-area{box-shadow:0 1px 0 #ffffffb8 inset, 0 14px 32px color-mix(in srgb, var(--z-console-focus-text) 9%, transparent)}}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-work-area{overscroll-behavior:contain;overflow-anchor:none;scrollbar-width:thin;scrollbar-color:#17150f33 transparent}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-work-area.is-inking{overscroll-behavior:none}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-lines{z-index:3;pointer-events:none;gap:12px;max-height:42%;display:grid;position:absolute;inset-block-start:18px;inset-inline:26px;overflow:auto}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-lines.legacy-history{border-block-end:1px solid var(--z-console-focus-border);pointer-events:auto;max-height:240px;padding:16px 26px;position:relative;inset:auto}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-row{width:100%;max-width:none;box-shadow:none;background:0 0;border:0;grid-template-columns:minmax(0,1fr) minmax(180px,.28fr);align-items:center;gap:clamp(34px,6vw,110px);padding:0;display:grid}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-work{align-items:center;min-width:0;display:flex}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-result{border-inline-start:1px solid var(--z-console-focus-border);justify-content:flex-start;align-items:center;gap:8px;min-height:46px;display:flex}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-result{border-inline-start:1px solid color-mix(in srgb, var(--z-console-focus-border) 76%, transparent)}}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-result{padding-inline-start:22px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-ink{background:var(--z-console-focus-paper);max-width:min(100%,940px);box-shadow:0 0 0 1px var(--z-console-focus-text);border-radius:8px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-ink{box-shadow:0 0 0 1px color-mix(in srgb, var(--z-console-focus-text) 24%, transparent)}}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-row.pending .z-pdf-sticky-line-ink{opacity:.58;box-shadow:none}.z-pdf-sticky-tick span{display:none}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick{width:auto;height:24px;box-shadow:none;white-space:nowrap;background:0 0;border:1px solid;border-radius:999px;flex:none;gap:4px;padding:0 7px;font-size:9px;font-weight:780;position:static}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick span{display:inline}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick svg{width:12px;height:12px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-shell{flex:auto;align-self:stretch;width:100%;min-height:0;position:relative}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad{width:100%;min-width:100%;min-height:100%;box-shadow:none;touch-action:none;overscroll-behavior:contain;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;border:0;border-radius:0;position:relative}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-shell{--z-sticky-canvas-safe-top:0px;box-sizing:border-box;overflow-anchor:none;background:0 0;padding-block-start:0}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-prompt{inset-block-start:34px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-shell.is-terminal{overflow-anchor:none}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-shell.is-terminal .z-pdf-sticky-ink-pad{background:#fff}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-shell.is-terminal canvas{opacity:.28}.z-pdf-sticky-attempt-ended{z-index:5;border:1px solid var(--z-desk-border-strong);background:var(--z-desk-panel-raised);inset-block-start:24px;border-radius:14px;justify-items:center;gap:7px;width:min(420px,100% - 40px);display:grid;position:absolute;left:50%}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-attempt-ended{background:color-mix(in srgb, var(--z-desk-panel-raised) 96%, transparent)}}.z-pdf-sticky-attempt-ended{color:var(--z-desk-text);text-align:center;box-shadow:var(--z-shadow-card);padding:20px 22px;transform:translate(-50%)}.z-pdf-sticky-attempt-ended>svg{width:20px;height:20px;color:var(--z-desk-gold)}.z-pdf-sticky-attempt-ended.is-completed>svg{color:var(--z-desk-sage-ink)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-attempt-ended.is-completed>svg{color:color-mix(in srgb, var(--z-desk-sage-ink) 40%, #a6d894)}}.z-pdf-sticky-attempt-ended strong{font-family:var(--z-font-display), var(--z-font-sans), serif;font-size:18px}.z-pdf-sticky-attempt-ended span{max-width:34ch;color:var(--z-desk-muted);font-size:12px;line-height:1.5}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad:before{z-index:1;background:linear-gradient(var(--z-console-focus-grid) 1px, transparent 1px), linear-gradient(90deg, var(--z-console-focus-grid) 1px, transparent 1px);content:"";pointer-events:none;background-size:32px 32px,32px 32px;position:absolute;inset:0}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-shell:after{display:none}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad canvas{z-index:0;width:100%;height:100%;box-shadow:none;touch-action:none;border:0;border-radius:0;display:block;position:absolute;inset:0}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad canvas.z-pdf-sticky-ink-live{touch-action:none;background:0 0;height:100%}.z-pdf-sticky-canvas-toolbar{z-index:8;border:1px solid var(--z-console-focus-border);background:var(--z-console-focus-panel-raised);border-radius:999px;place-self:start end;align-items:center;gap:5px;width:max-content;height:max-content;margin:10px 12px -48px 0;display:flex;position:sticky;inset-block-start:10px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-canvas-toolbar{background:color-mix(in srgb, var(--z-console-focus-panel-raised) 94%, transparent)}}.z-pdf-sticky-canvas-toolbar{box-shadow:var(--z-console-focus-shadow);padding:5px}.z-pdf-sticky-canvas-toolbar button{width:30px;height:30px;color:var(--z-console-focus-text);background:0 0;border:0;border-radius:999px;place-items:center;display:grid}.z-pdf-sticky-canvas-toolbar button:hover{background:var(--z-console-focus-hover)}.z-pdf-sticky-canvas-toolbar svg{width:16px;height:16px}.z-pdf-sticky-review-progress{color:var(--z-console-focus-muted);padding-inline:7px;font-size:11px}.z-pdf-sticky-review-stale,.z-pdf-sticky-review-summary{color:var(--z-console-focus-muted);margin:8px 16px;font-size:12px}.z-pdf-sticky-review-error{z-index:9;border:1px solid var(--z-console-danger);margin:0;position:absolute;inset-block-start:62px;inset-inline:16px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-review-error{border:1px solid color-mix(in srgb, var(--z-console-danger) 36%, var(--z-console-focus-border))}}.z-pdf-sticky-review-error{background:var(--z-console-focus-panel-raised);border-radius:10px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-review-error{background:color-mix(in srgb, var(--z-console-focus-panel-raised) 94%, var(--z-console-danger) 6%)}}.z-pdf-sticky-review-error{color:var(--z-console-danger);box-shadow:var(--z-console-focus-shadow);padding:9px 11px;font-size:12px}.z-pdf-sticky-review-overlays{z-index:4;pointer-events:none;position:absolute;inset:0}.z-pdf-sticky-review-annotation{display:contents}.z-pdf-sticky-review-overlay{pointer-events:none;background:0 0;border:1px solid #0000;position:absolute}.z-pdf-sticky-review-squiggle{height:8px;color:var(--z-console-danger);filter:drop-shadow(0 1px 0 var(--z-console-focus-panel-raised));position:absolute;overflow:visible}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-review-squiggle{filter:drop-shadow(0 1px 0 color-mix(in srgb, var(--z-console-focus-panel-raised) 72%, transparent))}}.z-pdf-sticky-review-squiggle{pointer-events:none}.z-pdf-sticky-review-squiggle path{fill:none;stroke:currentColor;stroke-dasharray:1;stroke-dashoffset:1px;stroke-linecap:round;stroke-linejoin:round;stroke-width:2.35px;vector-effect:non-scaling-stroke;animation:.42s cubic-bezier(.22,1,.36,1) forwards z-review-squiggle-draw}@keyframes z-review-squiggle-draw{to{stroke-dashoffset:0}}@media (prefers-reduced-motion:reduce){.z-pdf-sticky-review-squiggle path{stroke-dashoffset:0;animation:none}}.z-pdf-sticky-review-marker{background:var(--z-console-focus-panel-raised);min-width:25px;box-shadow:0 0 0 1px var(--z-console-focus-border);pointer-events:auto;border:0;border-radius:999px;padding:2px 5px;font-size:10px;font-weight:800;position:absolute;transform:translateY(-50%)}.z-pdf-sticky-review-marker.verified{color:var(--z-console-accent)}.z-pdf-sticky-review-marker.tutor-correct,.z-pdf-sticky-review-marker.accepted{color:var(--z-console-accent-muted)}.z-pdf-sticky-review-marker.muted{color:var(--z-console-focus-muted)}.z-pdf-sticky-review-marker.selected{box-shadow:0 0 0 1px var(--z-console-accent)}.z-pdf-sticky-review-marker:is(.verified,.tutor-correct,.accepted){padding:2px 7px;font-size:14px}.z-pdf-sticky-review-overlay.selected{border-color:var(--z-console-accent);background:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-review-overlay.selected{background:color-mix(in srgb, var(--z-console-accent) 8%, transparent)}}.z-pdf-sticky-review-passive-marker{background:var(--z-console-focus-panel-raised);min-width:25px;box-shadow:0 0 0 1px var(--z-console-focus-border);color:var(--z-console-accent);pointer-events:none;border-radius:999px;justify-content:center;align-items:center;padding:2px 5px;font-size:10px;font-weight:800;display:none;position:absolute;transform:translateY(-50%)}.z-pdf-sticky-review-passive-marker.tutor-correct,.z-pdf-sticky-review-passive-marker.accepted{color:var(--z-console-accent-muted)}.z-pdf-sticky-review-passive-marker:is(.verified,.tutor-correct,.accepted){padding:2px 7px;font-size:14px}@media (any-pointer:coarse){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad canvas.z-pdf-sticky-ink-live{z-index:6}.z-pdf-sticky-review-marker{display:none}.z-pdf-sticky-review-passive-marker.verified,.z-pdf-sticky-review-passive-marker.tutor-correct{display:inline-flex}}.z-pdf-sticky-block-inspector{border:1px solid var(--z-console-focus-border);background:var(--z-console-focus-panel-raised);color:var(--z-console-focus-text);border-radius:12px;gap:7px;margin:10px 14px 14px;padding:12px 14px;display:grid}.z-pdf-sticky-block-inspector>span,.z-pdf-sticky-block-inspector small{color:var(--z-console-focus-muted);font-size:11px}.z-pdf-sticky-block-inspector button{width:max-content}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-recognition-disclosure{z-index:16;width:max-content;height:0;color:var(--z-console-warning);margin-block-start:8px;margin-inline-start:14px;position:sticky;inset-block-start:8px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-recognition-disclosure>summary{cursor:pointer;border:1px solid var(--z-console-focus-border);background:var(--z-console-focus-panel-raised);width:36px;height:36px;box-shadow:var(--z-console-focus-shadow);border-radius:999px;place-items:center;list-style:none;display:grid;position:relative}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-recognition-disclosure>summary::-webkit-details-marker{display:none}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-recognition-disclosure>summary:after{border:1px solid var(--z-console-focus-panel-raised);content:"";background:currentColor;border-radius:50%;width:6px;height:6px;position:absolute;inset-block-start:3px;inset-inline-end:3px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-recognition-disclosure>summary svg{width:17px;height:17px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-recognition-disclosure[open]{width:min(640px,100% - 28px)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-recognition-disclosure[open]>summary{margin-block-end:6px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-recognition-disclosure .z-pdf-sticky-block-inspector{width:100%;box-shadow:var(--z-console-focus-shadow);margin:0;position:static}.z-pdf-sticky-card.composer.focus,.z-pdf-sticky-card.composer.focus:hover,.z-pdf-sticky-card.composer.focus:focus-within{border-radius:0;gap:10px}.z-pdf-sticky-card.composer.focus>header.z-pdf-sticky-focus-header{grid-template-columns:minmax(240px,1fr);grid-auto-columns:auto;grid-auto-flow:column;align-items:center;column-gap:8px;min-height:58px;padding:0 2px 10px;display:grid}.z-pdf-sticky-focus-context,.z-pdf-sticky-focus-controls,.z-pdf-sticky-focus-meta,.z-pdf-sticky-focus-toolbar,.z-pdf-sticky-focus-ink-tools{align-items:center;min-width:0;display:flex}.z-pdf-sticky-focus-context{gap:16px;margin-inline-end:10px}.z-pdf-sticky-focus-controls{justify-content:flex-end;gap:8px}.z-pdf-sticky-focus-meta{color:var(--z-console-focus-muted);font:500 13px/1.3 var(--z-font-sans);white-space:nowrap;gap:8px;overflow:hidden}.z-pdf-sticky-focus-meta strong{color:var(--z-console-focus-text);font:inherit;text-overflow:ellipsis;overflow:hidden}.z-pdf-sticky-focus-meta>span:before{color:var(--z-console-focus-border-strong);content:"·";margin-inline-end:8px}.z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-focus-back{width:auto;min-width:0;color:var(--z-console-focus-text);border:0;flex:none;align-items:center;gap:7px;padding:0 4px;font-size:12px;font-weight:760;display:inline-flex}[dir=rtl] .z-pdf-sticky-focus-back svg{transform:rotate(180deg)}.z-pdf-sticky-focus-ink-tools{border:1px solid var(--z-console-focus-border);background:var(--z-console-focus-panel-raised);border-radius:11px;gap:2px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-focus-ink-tools{background:color-mix(in srgb, var(--z-console-focus-panel-raised) 92%, transparent)}}.z-pdf-sticky-focus-ink-tools{padding:3px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-option>summary{width:30px;min-width:30px;height:30px;color:var(--z-console-focus-muted);cursor:pointer;background:0 0;border:0;border-radius:8px;place-items:center;list-style:none;display:grid}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button:hover,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-option[open]>summary,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-option>summary:hover{background:var(--z-console-focus-hover);color:var(--z-console-focus-text)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button.active{background:var(--z-console-accent);position:relative}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button.active{background:color-mix(in srgb, var(--z-console-accent) 18%, var(--z-console-focus-panel-raised))}}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button.active{color:var(--z-console-accent);box-shadow:inset 0 0 0 1px var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button.active{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--z-console-accent) 62%, var(--z-console-focus-border))}}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button.active:after{content:"";background:currentColor;border-radius:999px;width:3px;height:3px;position:absolute;inset-block-end:3px;inset-inline-start:50%;transform:translate(-50%)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button:disabled{cursor:default;opacity:.3}.z-pdf-sticky-ink-swatches{display:none}.z-pdf-sticky-ink-option{position:relative}.z-pdf-sticky-ink-option>summary::-webkit-details-marker{display:none}.z-pdf-sticky-ink-color-current{border:2px solid var(--z-console-focus-panel-raised);width:14px;height:14px;box-shadow:0 0 0 1px var(--z-console-focus-border-strong);border-radius:999px}.z-pdf-sticky-ink-width-current,.z-pdf-sticky-ink-popover.width button span{background:var(--z-console-focus-text);border-radius:999px;width:17px;display:block}.z-pdf-sticky-ink-popover{z-index:20;border:1px solid var(--z-console-focus-border-strong);background:var(--z-console-focus-panel-raised);box-shadow:var(--z-console-focus-shadow);border-radius:12px;gap:5px;padding:7px;display:flex;position:absolute;inset-block-start:calc(100% + 9px);inset-inline-start:50%;transform:translate(-50%)}[dir=rtl] .z-pdf-sticky-ink-popover{transform:translate(50%)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-popover button{border:3px solid var(--z-console-focus-panel-raised);width:28px;min-width:28px;height:28px;box-shadow:0 0 0 1px var(--z-console-focus-border);border-radius:999px;place-items:center;padding:0;display:grid}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-popover button.active{box-shadow:0 0 0 2px var(--z-console-focus-text)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-popover.width button{box-shadow:none;background:0 0;border:0;border-radius:8px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-popover.width button.active{background:var(--z-console-focus-hover);box-shadow:inset 0 0 0 1px var(--z-console-focus-border-strong)}.z-pdf-sticky-tool-divider{background:var(--z-console-focus-border);width:1px;height:18px;margin-inline:2px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source{border-bottom:1px solid var(--z-console-focus-border);min-height:0;max-height:min(34vh,340px);padding:clamp(16px,2vw,26px) clamp(18px,3vw,48px);display:block;overflow:auto}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content{max-width:80ch;font-family:var(--z-font-sans), sans-serif;letter-spacing:-.006em;margin:0;font-weight:500;line-height:1.52;font-size:clamp(18px,1.35vw,23px)!important}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-structured-source{gap:.58em;display:grid}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-structured-source>p,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-structured-source>ul,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-structured-source>ol{color:inherit;font:inherit;letter-spacing:inherit;margin:0}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-structured-source>ul,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-structured-source>ol{gap:.28em;padding-inline-start:1.4em;display:grid}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content .katex{font-size:1em}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-work-area{border-radius:14px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-prompt{font-size:clamp(17px,1.6vw,23px);inset-block-start:30px;inset-inline-start:42px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus{width:calc(100% - 82px);margin-inline:0 82px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay):has(.z-document-assistant-dock.expanded) .z-pdf-sticky-card.composer.focus{width:calc(100% - 388px);margin-inline:0 388px}[dir=rtl] .z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay):has(.z-document-assistant-dock.expanded) .z-pdf-sticky-card.composer.focus{width:calc(100% - 388px);margin-inline:0 388px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock{inset-block-start:14px;inset-inline:auto 14px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded{border-radius:18px;width:360px;max-height:calc(100dvh - 28px)}@media (max-width:980px){.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus{width:100%;margin-inline:0}[dir=rtl] .z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus{width:100%;margin-inline:0}.z-pdf-sticky-focus-overlay{padding:8px}.z-pdf-sticky-card.composer.focus,.z-pdf-sticky-card.composer.focus:hover,.z-pdf-sticky-card.composer.focus:focus-within{border-radius:14px;padding:8px}}@media (max-width:620px){.z-pdf-sticky-card.composer.focus>header{flex-wrap:wrap;min-height:48px;padding-inline-start:12px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-header-actions{flex-wrap:wrap;flex:100%;max-width:100%}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source{grid-template-columns:1fr;gap:5px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source>span:first-child{align-self:auto}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-row{grid-template-columns:1fr;gap:8px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-result{border-block-start:1px solid var(--z-console-focus-border);min-height:34px}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-result{border-block-start:1px solid color-mix(in srgb, var(--z-console-focus-border) 76%, transparent)}}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-line-result{border-inline-start:0;padding-block-start:8px;padding-inline-start:0}}@media (max-width:1180px){.z-pdf-sticky-card.composer.focus>header.z-pdf-sticky-focus-header{grid-template-columns:minmax(190px,1fr);column-gap:5px}.z-pdf-sticky-focus-overlay .z-pdf-sticky-focus-meta span:first-of-type{display:none}.z-pdf-sticky-focus-controls{gap:5px}}@media (max-width:820px){.z-pdf-sticky-card.composer.focus>header.z-pdf-sticky-focus-header{grid-template-columns:auto minmax(0,1fr);grid-auto-flow:row;gap:7px;min-height:94px;padding:4px 4px 9px;display:grid}.z-pdf-sticky-focus-context{grid-column:1/-1}.z-pdf-sticky-focus-controls{scrollbar-width:none;justify-content:flex-start;padding-bottom:1px;overflow-x:auto}.z-pdf-sticky-focus-controls::-webkit-scrollbar{display:none}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source{max-height:30vh;padding:16px 18px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content{font-size:clamp(18px,3.4vw,21px)!important}}.z-pdf-note-tabs{scrollbar-width:none;align-items:stretch;gap:2px;min-width:0;display:flex;overflow-x:auto}.z-pdf-note-tabs::-webkit-scrollbar{display:none}.z-pdf-note-tabs>button{min-height:34px;color:var(--z-desk-ink-text);background:0 0;border:0;border-radius:0;flex:none;align-items:center;gap:7px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.z-pdf-note-tabs>button{color:color-mix(in srgb, var(--z-desk-ink-text) 58%, transparent)}}.z-pdf-note-tabs>button{font:600 12px/1 var(--z-font-sans), sans-serif;cursor:pointer;padding:0 11px;transition:color .12s,box-shadow .12s;box-shadow:inset 0 -2px #0000}.z-pdf-note-tabs>button small{color:var(--z-desk-ink-text)}@supports (color:color-mix(in lab, red, red)){.z-pdf-note-tabs>button small{color:color-mix(in srgb, var(--z-desk-ink-text) 42%, transparent)}}.z-pdf-note-tabs>button small{font:680 9px/1 var(--z-font-mono), ui-monospace, monospace;letter-spacing:.06em;text-transform:uppercase}.z-pdf-note-tabs>button:hover{color:var(--z-desk-ink-text)}.z-pdf-note-tabs>button.active{color:var(--z-desk-ink-text);box-shadow:inset 0 -2px 0 var(--z-desk-gold-deep)}.z-pdf-note-tabs-chip{background:var(--z-desk-gold-soft);border-radius:1px 3px 1px 1px;width:10px;height:12px}@supports (color:color-mix(in lab, red, red)){.z-pdf-note-tabs-chip{background:color-mix(in srgb, var(--z-desk-gold-soft) 72%, var(--z-desk-paper))}}.z-pdf-note-tabs-chip{box-shadow:inset -2px -2px 0 var(--z-desk-gold-deep)}@supports (color:color-mix(in lab, red, red)){.z-pdf-note-tabs-chip{box-shadow:inset -2px -2px 0 color-mix(in srgb, var(--z-desk-gold-deep) 30%, transparent)}}.z-pdf-note-tabs-bar{z-index:3;border-bottom:1px solid var(--z-desk-paper-edge);background:var(--z-desk-paper);color:var(--z-desk-ink-text);padding:2px 10px 0;position:relative}.z-pdf-toolbar-center:has(.z-pdf-note-tabs){align-self:stretch;align-items:flex-end;min-width:0;display:flex}.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-stage.has-note-tabs{grid-template-rows:auto minmax(0,1fr)}.z-pdf-note-flag{z-index:2;border:1px solid var(--z-desk-gold-deep);flex-direction:column;justify-content:center;align-items:center;gap:2px;width:30px;height:38px;display:inline-flex;position:absolute}@supports (color:color-mix(in lab, red, red)){.z-pdf-note-flag{border:1px solid color-mix(in srgb, var(--z-desk-gold-deep) 34%, transparent)}}.z-pdf-note-flag{background:var(--z-desk-gold-soft);border-inline-start:0;border-radius:0 7px 7px 0}@supports (color:color-mix(in lab, red, red)){.z-pdf-note-flag{background:color-mix(in srgb, var(--z-desk-gold-soft) 72%, var(--z-desk-paper))}}.z-pdf-note-flag{color:var(--z-desk-ink-text);cursor:pointer;pointer-events:auto;transform-origin:0;padding:0;transition:transform .16s,box-shadow .16s;transform:translateY(-50%)rotate(-5deg);box-shadow:3px 4px 10px #00000038}.z-pdf-note-flag:before{background:var(--z-desk-gold-deep);width:5px;position:absolute;inset-block:0;inset-inline-start:0}@supports (color:color-mix(in lab, red, red)){.z-pdf-note-flag:before{background:color-mix(in srgb, var(--z-desk-gold-deep) 22%, transparent)}}.z-pdf-note-flag:before{content:""}.z-pdf-note-flag svg{width:13px;height:13px}.z-pdf-note-flag span{font:760 10px/1 var(--z-font-mono), ui-monospace, monospace}:is(.z-pdf-note-flag:hover,.z-pdf-note-flag:focus-visible){transform:translate(3px,-50%)rotate(-1deg);box-shadow:5px 6px 14px #00000047}.z-pdf-note-flag:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:2px}.z-pdf-note-flag.active{border-color:var(--z-desk-gold);box-shadow:0 0 0 2px var(--z-desk-gold-wash), 3px 4px 10px #00000038}.z-pdf-sticky-source-body{align-content:center;gap:10px;min-width:0;display:grid}.z-pdf-sticky-source-image{object-fit:contain;border:1px solid var(--z-desk-paper-edge);background:#fff;border-radius:6px;width:auto;max-width:100%;height:auto;max-height:min(24vh,200px);display:block}[dir=rtl] .z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-prompt{inset-inline:auto 42px}.z-practice-shell.z-chat-frame{background:var(--z-console-bg);flex-direction:column!important;grid-template-rows:none!important;grid-template-columns:none!important;display:flex!important}.z-practice-shell.exercise-active :is(img,svg,a,canvas){-webkit-user-drag:none}.z-practice-main{background:var(--z-console-bg);width:100%;min-width:0;min-height:0;color:var(--z-console-text);flex:auto;padding:38px clamp(20px,4vw,64px) 64px;position:relative;overflow:auto}.z-practice-main.problem-active{color:var(--z-desk-text);padding:10px;overflow:hidden;background:var(--z-desk-ink)!important}.z-practice-main.problem-active .z-practice-problem-head a,.z-practice-main.problem-active .z-practice-problem-context{color:var(--z-desk-muted)}.z-practice-main.problem-active .z-practice-problem-head a:hover{color:var(--z-desk-text)}.z-practice-shell.library-active{--z-console-black:var(--z-desk-ink);--z-console-bg:var(--z-desk-ink);--z-console-panel:var(--z-desk-panel);--z-console-panel-raised:var(--z-desk-panel-raised);--z-console-input:var(--z-desk-input);--z-console-hover:var(--z-desk-hover);--z-console-border:var(--z-desk-border);--z-console-border-strong:var(--z-desk-border-strong);--z-console-text:var(--z-desk-text);--z-console-muted:var(--z-desk-muted);--z-console-faint:var(--z-desk-faint);--z-console-accent:var(--z-desk-gold);--z-console-accent-on:var(--z-desk-gold-on);--z-console-accent-soft:var(--z-desk-gold-wash);--z-console-accent-border:var(--z-desk-gold-border);--z-console-accent-hover:var(--z-desk-gold-hover);--z-console-accent-hover-border:#d2aa4c9e;--z-console-accent-muted:var(--z-desk-gold-soft)}.z-practice-shell.library-active .z-practice-main{background:radial-gradient(850px 420px at 72% -8%, #c69a3812, transparent 62%), var(--z-desk-ink);color:var(--z-desk-text);padding:32px clamp(20px,3.5vw,42px) 56px}.z-practice-study-card{background:var(--z-desk-paper);min-width:0;color:var(--z-desk-ink-text);box-shadow:var(--z-desk-shadow);border:1px solid #ffffff1f;border-radius:12px;overflow:clip}.z-practice-study-card-header{border-bottom:1px solid #17150f1f;justify-content:stretch;align-items:center;gap:10px;padding:14px 18px;display:flex}.z-practice-resume{-webkit-appearance:none;appearance:none;border:1px solid var(--z-desk-gold-border);min-height:32px;color:var(--z-desk-gold-deep);font:inherit;white-space:nowrap;cursor:pointer;background:0 0;border-radius:8px;flex:none;align-items:center;gap:6px;padding:0 11px;font-size:12.5px;font-weight:600;display:inline-flex}:is(.z-practice-resume:hover,.z-practice-resume:focus-visible){background:var(--z-desk-gold-wash)}.z-practice-resume:disabled{cursor:wait;opacity:.55}.z-practice-resume svg{width:14px;height:14px}.z-practice-study-card-header h2{font-family:var(--z-font-display), Georgia, serif;letter-spacing:-.03em;margin:0;font-size:1.55rem;font-weight:500}.z-practice-study-card-header p{color:#665f54;margin:6px 0 0;font-size:13px}.z-practice-study-card .z-practice-search{width:100%;min-width:0;color:var(--z-desk-ink-text);background:#ffffff75;border-color:#17150f24}.z-practice-study-card .z-practice-search input{color:var(--z-desk-ink-text)}.z-practice-study-card .z-practice-search svg{color:#81786a}.z-practice-folio{grid-template-columns:320px minmax(0,1fr);min-height:540px;display:grid}.z-practice-contents{min-width:0;color:var(--z-desk-text);background:linear-gradient(#211e17 0%,#1c1913 100%);border-inline-end:1px solid #17150f1a;padding:26px 18px}.z-practice-contents-sticky{scrollbar-width:thin;max-height:calc(100dvh - 96px);position:sticky;top:16px;overflow-y:auto}.z-practice-contents-title{font-family:var(--z-font-display), Georgia, serif;padding:0 10px 8px;font-size:18px}.z-practice-contents-meta{color:#746e64;border-bottom:1px solid #ffffff14;gap:4px;margin-bottom:12px;padding:0 10px 14px;font-size:11px;line-height:1.4;display:grid}.z-practice-chapter,.z-practice-chapter-skeleton{color:#aaa396;text-align:start;background:0 0;border:0;border-radius:8px;align-items:center;gap:10px;width:100%;margin-top:6px;padding:10px;font-size:13px;display:flex}.z-practice-chapter:hover{color:#efe7d9;background:#ffffff09}.z-practice-chapter.active{color:#f2d88f;background:#c69a381a}.z-practice-chapter-dot{background:#4a453d;border-radius:50%;flex:0 0 7px;width:7px;height:7px}.z-practice-chapter.active .z-practice-chapter-dot{background:var(--z-desk-gold);box-shadow:0 0 0 3px #c69a381a}.z-practice-chapter.has-progress{flex-direction:column;align-items:stretch;gap:10px;padding:14px 12px}.z-practice-chapter-main{align-items:center;gap:12px;width:100%;min-width:0;display:flex}.z-practice-chapter-label{flex:1;min-width:0;line-height:1.5}.z-practice-chapter-main em{color:#8f877a;font-variant-numeric:tabular-nums;flex:none;font-size:11px;font-style:normal}.z-practice-chapter.active .z-practice-chapter-main em{color:#f2d88f}.z-practice-chapter-track{background:#ffffff14;border-radius:999px;height:3px;margin-inline-start:19px;display:block;overflow:hidden}.z-practice-chapter-fill{border-radius:inherit;height:100%;display:block}.z-practice-chapter-fill.zero{opacity:.55}.z-practice-chapter-skeleton{background:#ffffff0a;min-height:36px}.z-practice-problem-area{min-width:0;padding:14px 24px 24px;container-type:inline-size}.z-practice-problem-titlebar{justify-content:space-between;align-items:center;gap:16px;padding-bottom:10px;display:flex}.z-practice-problem-titlebar>div:first-child{flex:auto;min-width:0}.z-practice-problem-titlebar h3{font-family:var(--z-font-display), Georgia, serif;margin:0;font-size:1.2rem;font-weight:500}.z-practice-problem-titlebar p{color:#6d655a;margin:6px 0 0;font-size:12px;line-height:1.45}.z-practice-problem-count{color:#7a7266;white-space:nowrap;font-size:12px}.z-practice-section-rule{color:#746c60;font-family:var(--z-font-display), Georgia, serif;align-items:center;gap:10px;margin:10px 0 2px;font-size:13px;font-style:italic;display:flex}[dir=rtl] .z-practice-section-rule{font-family:inherit;font-style:normal}.z-practice-section-rule:after{content:"";background:#17150f1c;flex:1;height:1px}.z-practice-study-card .z-practice-problem-list{background:0 0;border:0;border-radius:0;overflow:visible}.z-practice-study-card .z-practice-problem-row{min-height:0;color:var(--z-desk-ink-text);border-bottom:1px solid #17150f1a;grid-template-columns:34px minmax(0,1fr) 34px;gap:11px;padding:14px 4px;display:grid}.z-practice-study-card .z-practice-problem-row:hover{background:#ffffff5c;border-radius:8px;margin:0 -10px;padding-inline:14px}.z-practice-study-card .z-practice-status-mark{color:#0000;background:0 0;border-color:#17150f47;width:22px;height:22px}.z-practice-study-card .z-practice-status-mark.independent,.z-practice-study-card .z-practice-status-mark.assisted{border-color:var(--z-desk-sage-ink);background:var(--z-desk-sage-ink);color:var(--z-desk-verified-on)}.z-practice-study-card .z-practice-status-mark.reviewed{border-color:var(--z-desk-gold);color:var(--z-desk-gold);background:0 0}.z-practice-study-card .z-practice-status-mark.active{border-color:var(--z-desk-gold);color:var(--z-desk-gold)}.z-practice-study-card .z-practice-row-math{color:#211d16;font-family:var(--z-font-display), Georgia, serif;white-space:normal;font-size:1.12rem}.z-practice-study-card .z-practice-row-title small,.z-practice-row-meta{color:#7b7368;flex-wrap:wrap;align-items:center;gap:8px;font-size:11px;display:flex}.z-practice-diff{align-items:center;gap:5px;font-size:11px;font-weight:600;display:inline-flex}.z-practice-diff:before{content:"";background:currentColor;border-radius:50%;width:5px;height:5px}.z-practice-diff.easy{color:var(--z-desk-sage-ink)}.z-practice-diff.medium{color:var(--z-desk-gold-deep)}.z-practice-diff.hard{color:var(--z-desk-rust-ink)}.z-practice-problem-go{color:#655c50;border:1px solid #17150f24;border-radius:50%;place-items:center;width:34px;height:34px;display:grid}.z-practice-problem-go svg{width:16px;height:16px}.z-practice-study-card .z-practice-problem-row-skeleton{background:#17150f0a;min-height:56px}.z-practice-library{width:min(1480px,100%);margin:0 auto}.z-practice-library-layout{grid-template-columns:minmax(0,1fr);align-items:start;display:grid}.z-practice-section-head.compact h2{font-size:1.25rem}.z-practice-problem-row{--z-practice-topic:var(--z-console-accent);--z-practice-topic-soft:var(--z-console-accent-soft)}.topic-finite-limits{--z-practice-topic:#6ca787;--z-practice-topic-soft:#6ca7871f}.topic-diagnostic{--z-practice-topic:#79c5ae;--z-practice-topic-soft:#79c5ae21}.topic-derivatives{--z-practice-topic:#70a9dc;--z-practice-topic-soft:#70a9dc21}.topic-antiderivatives{--z-practice-topic:#aa8bc4;--z-practice-topic-soft:#aa8bc421}.topic-definite-integrals{--z-practice-topic:#d3a24f;--z-practice-topic-soft:#d3a24f21}.z-practice-section-head{justify-content:space-between;align-items:center;gap:14px;display:flex}.z-practice-section-head h2{font-family:var(--font-fraunces), Georgia, serif;margin:4px 0 0;font-size:1.55rem}.z-practice-section-head>span{color:var(--z-console-muted);font:650 .72rem var(--z-font-mono), ui-monospace, monospace}.z-practice-search{border:1px solid var(--z-console-border);background:var(--z-console-input);border-radius:9px;flex:1;align-items:center;gap:9px;min-width:220px;padding:0 12px;display:flex}.z-practice-search:focus-within{border-color:var(--z-console-accent-border);outline:1px solid var(--z-console-accent-border)}.z-practice-search svg{width:17px;color:var(--z-console-muted)}.z-practice-search input{height:42px;color:var(--z-console-text);font:inherit;background:0 0;border:0;outline:0;flex:1;min-width:0}.z-practice-search input::placeholder{color:var(--z-console-muted)}.z-practice-problem-list{border:1px solid var(--z-console-border);background:var(--z-console-panel);border-radius:12px;overflow:hidden}.z-practice-problem-row{border:0;border-bottom:1px solid var(--z-console-border);width:100%;min-height:72px;color:var(--z-console-text);text-align:start;background:0 0;grid-template-columns:44px minmax(230px,1.35fr) minmax(135px,.8fr) 92px 64px 20px;align-items:center;gap:12px;padding:0 16px;display:grid}.z-practice-problem-row:last-of-type{border-bottom:0}.z-practice-problem-row:hover{background:var(--z-console-hover)}.z-practice-problem-row:disabled{cursor:wait;opacity:.55}.z-practice-problem-row>span:not(.z-practice-row-title,.z-practice-status-mark){color:var(--z-console-muted);text-overflow:ellipsis;white-space:nowrap;font-size:.78rem;overflow:hidden}.z-practice-problem-row>svg{width:17px;color:var(--z-console-muted);transition:transform .12s}.z-practice-problem-row:hover>svg{color:var(--z-console-text);transform:translate(2px)}[dir=rtl] .z-practice-problem-row>svg{transform:scaleX(-1)}[dir=rtl] .z-practice-problem-row:hover>svg{transform:scaleX(-1)translate(2px)}.z-practice-status-mark{border:1px solid var(--z-console-border-strong);width:25px;height:25px;color:var(--z-console-muted);font:700 .68rem var(--z-font-mono), ui-monospace, monospace;border-radius:50%;place-items:center;display:grid}.z-practice-problem-row:not(:has(.z-practice-status-mark.independent,.z-practice-status-mark.assisted,.z-practice-status-mark.reviewed,.z-practice-status-mark.active)) .z-practice-status-mark{border-color:var(--z-practice-topic)}@supports (color:color-mix(in lab, red, red)){.z-practice-problem-row:not(:has(.z-practice-status-mark.independent,.z-practice-status-mark.assisted,.z-practice-status-mark.reviewed,.z-practice-status-mark.active)) .z-practice-status-mark{border-color:color-mix(in srgb, var(--z-practice-topic) 42%, var(--z-console-border))}}.z-practice-problem-row:not(:has(.z-practice-status-mark.independent,.z-practice-status-mark.assisted,.z-practice-status-mark.reviewed,.z-practice-status-mark.active)) .z-practice-status-mark{background:var(--z-practice-topic-soft);color:var(--z-practice-topic)}.z-practice-status-mark.independent,.z-practice-status-mark.assisted{border-color:var(--z-console-accent-border);background:var(--z-console-accent-soft);color:var(--z-console-accent)}.z-practice-status-mark.assisted{background:0 0;border-style:dashed}.z-practice-status-mark.reviewed{border-color:var(--z-console-border-strong);background:var(--z-console-input);color:var(--z-console-muted)}.z-practice-status-mark.active{border-color:var(--z-console-accent);color:var(--z-console-accent)}.z-practice-row-title{flex-direction:column;gap:4px;min-width:0;display:flex}.z-practice-row-title strong{text-overflow:ellipsis;white-space:nowrap;font-size:.89rem;overflow:hidden}.z-practice-row-title small{color:var(--z-console-muted);font-size:.71rem}.z-practice-row-math{color:var(--z-console-muted);text-overflow:ellipsis;white-space:nowrap;font-size:.94rem;display:block;overflow:hidden}.z-practice-row-math .z-mixed-math-inline{direction:ltr;unicode-bidi:isolate}.z-practice-row-math .z-mixed-math-display{display:inline}.z-practice-row-math .katex{color:inherit;font-size:1em}.z-practice-empty{color:var(--z-console-muted);text-align:center;margin:0;padding:38px 20px}.z-practice-problem-row-skeleton{border:1px solid var(--z-console-border);background:linear-gradient(90deg, var(--z-console-input) 0%, var(--z-console-hover) 50%, var(--z-console-input) 100%);display:block}@supports (color:color-mix(in lab, red, red)){.z-practice-problem-row-skeleton{background:linear-gradient(90deg, var(--z-console-input) 0%, color-mix(in srgb, var(--z-console-hover) 70%, var(--z-console-input)) 50%, var(--z-console-input) 100%)}}.z-practice-problem-row-skeleton{background-size:220% 100%;animation:1.4s ease-in-out infinite alternate z-practice-loading-pulse}.z-practice-list-more{display:grid}.z-practice-list-loading{border-bottom:1px solid var(--z-console-border);padding:22px 20px 18px;display:flex}.z-practice-problem-row-skeleton{border-width:0 0 1px;border-radius:0;min-height:72px}.z-practice-problem-row-skeleton:last-child{border-bottom:0}.z-practice-actions button{border:1px solid var(--z-console-border);background:var(--z-console-input);color:var(--z-console-text);cursor:pointer;border-radius:9px;padding:9px 13px}.z-practice-actions button.primary{border-color:var(--z-console-accent);background:var(--z-console-accent);color:var(--z-console-accent-on);font-weight:750}.z-practice-actions button:disabled{opacity:.5;cursor:not-allowed}.z-practice-problem{grid-template-rows:minmax(0,1fr);height:100%;min-height:0;display:grid}.z-practice-exercise-loading{grid-template-rows:38px minmax(0,1fr)}.z-practice-problem-head{justify-content:space-between;align-items:center;gap:16px;min-width:0;padding:0 5px 8px;display:flex}.z-practice-problem-context{min-width:0;color:var(--z-console-focus-muted);font:650 10px/1.2 var(--z-font-mono), ui-monospace, monospace;letter-spacing:.055em;text-transform:uppercase;align-items:center;gap:10px;display:flex}.z-practice-problem-context>span+span:before{color:var(--z-console-focus-border-strong);content:"·";margin-inline-end:10px}.z-practice-problem-head a{color:var(--z-console-focus-muted);flex:none;align-items:center;gap:7px;font-size:12px;font-weight:700;text-decoration:none;display:inline-flex}.z-practice-problem-head a:hover{color:var(--z-console-focus-text)}.z-practice-problem-head a svg{width:15px;height:15px;transform:rotate(180deg)}[dir=rtl] .z-practice-problem-head a svg{transform:none}.z-practice-scratch{min-width:0;height:100%;min-height:0;display:grid;overflow:hidden}.z-practice-loading-scratch{border:1px solid var(--z-console-focus-border);background:var(--z-console-focus-panel);border-radius:16px;grid-template-rows:minmax(142px,.22fr) minmax(0,1fr);min-width:0;min-height:0;display:grid;overflow:hidden}.z-practice-loading-source,.z-practice-loading-canvas{flex-direction:column;justify-content:center;gap:16px;min-width:0;padding:clamp(22px,3vw,42px);display:flex}.z-practice-loading-source{border-bottom:1px solid var(--z-console-focus-border)}.z-practice-loading-canvas{background:linear-gradient(var(--z-console-focus-grid) 1px, transparent 1px), linear-gradient(90deg, var(--z-console-focus-grid) 1px, transparent 1px), var(--z-console-focus-paper);background-size:60px 60px;align-items:center}.z-practice-loading-line{background:var(--z-console-focus-border);opacity:.68;border-radius:999px;height:14px;animation:1.4s ease-in-out infinite alternate z-practice-loading-pulse;display:block}.z-practice-loading-line.short{width:min(180px,35%)}.z-practice-loading-line.long{width:min(680px,72%);height:28px}@keyframes z-practice-loading-pulse{to{opacity:.32}}@media (prefers-reduced-motion:reduce){.z-practice-loading-line{animation:none}}.z-practice-scratch .z-pdf-sticky-card.composer.focus,.z-practice-scratch .z-pdf-sticky-card.composer.focus:hover,.z-practice-scratch .z-pdf-sticky-card.composer.focus:focus-within{width:100%;height:100%;position:relative;inset:auto}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-source{min-height:0!important;max-height:min(34vh,340px)!important}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-source{padding:clamp(18px,1.8vw,26px) clamp(22px,2.6vw,40px)}@media (min-width:761px){.z-practice-problem:has(>.z-practice-tutor) .z-practice-scratch .z-pdf-sticky-card.composer.focus>.z-pdf-sticky-source{padding-inline-end:380px}}@media (min-width:1100px){.z-practice-problem:has(>.z-practice-tutor) .z-practice-scratch .z-pdf-sticky-card.composer.focus>.z-pdf-sticky-source{padding-inline-end:440px}}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content{letter-spacing:0;max-width:68ch;font-weight:450;line-height:1.62;font-size:clamp(17px,1.25vw,20px)!important}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-structured-source{gap:.45em}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content .katex{font-size:1.1em}.z-pdf-sticky-focus-overlay .z-pdf-sticky-card.composer.focus,.z-pdf-sticky-focus-overlay .z-pdf-sticky-card.composer.focus:hover,.z-pdf-sticky-focus-overlay .z-pdf-sticky-card.composer.focus:focus-within{background:var(--z-desk-paper);box-shadow:var(--z-desk-shadow);border-radius:16px;gap:0;overflow:hidden}.z-pdf-sticky-focus-overlay .z-pdf-sticky-card.composer.focus>header.z-pdf-sticky-focus-header{background:var(--z-desk-charcoal);border-bottom:0;min-height:54px;padding:8px 14px}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-focus-meta{color:var(--z-desk-muted)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-focus-meta strong{color:var(--z-desk-text)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-focus-meta>span:before{color:var(--z-desk-faint)}@media (min-width:641px){.z-practice-main.problem-active{padding:6px clamp(12px,1.6vw,20px) clamp(12px,1.6vw,20px)}.z-practice-scratch{overflow:visible}.z-practice-scratch .z-pdf-sticky-card.composer.focus,.z-practice-scratch .z-pdf-sticky-card.composer.focus:hover,.z-practice-scratch .z-pdf-sticky-card.composer.focus:focus-within{box-shadow:none;background:0 0;border-radius:0;grid-template:"back meta controls""source source source""tools tools tools""work work work"minmax(0,1fr)/minmax(0,1fr) auto minmax(0,1fr);gap:14px 16px;overflow:visible}.z-practice-scratch .z-pdf-sticky-card.composer.focus.no-source{grid-template-rows:auto auto minmax(0,1fr);grid-template-areas:"back meta controls""tools tools tools""work work work"}.z-practice-scratch .z-pdf-sticky-card.composer.focus:not(:has(.z-pdf-sticky-focus-toolbar)){grid-template-rows:auto auto minmax(0,1fr);grid-template-areas:"back meta controls""source source source""work work work"}.z-practice-scratch .z-pdf-sticky-card.composer.focus>header.z-pdf-sticky-focus-header,.z-practice-scratch .z-pdf-sticky-focus-context{display:contents}.z-practice-scratch .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-focus-back{grid-area:back;justify-self:start;gap:8px;min-height:56px;padding-inline:0 4px;font-size:15px;font-weight:500}.z-practice-scratch .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-focus-back svg{width:17px;height:17px}.z-practice-scratch .z-pdf-sticky-focus-meta{grid-area:meta;justify-self:center;gap:10px;font-size:14px;font-weight:500}.z-practice-scratch .z-pdf-sticky-focus-meta>span:before{margin-inline-end:10px}.z-practice-scratch .z-pdf-sticky-focus-controls{grid-area:controls;justify-self:end;gap:10px}.z-practice-scratch .z-pdf-sticky-card.composer.focus>.z-pdf-sticky-source{border:1px solid var(--z-desk-paper-edge);background:var(--z-desk-paper-2);border-radius:12px;grid-area:source;padding:18px 22px}.z-practice-scratch .z-pdf-sticky-source-title{color:var(--z-desk-ink-text);font:600 22px/1.25 var(--z-font-display), Georgia, serif;letter-spacing:-.005em;margin:0}[dir=rtl] .z-practice-scratch .z-pdf-sticky-source-title{font-family:inherit;font-weight:600}.z-practice-scratch .z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content{font-family:var(--z-font-display), Georgia, serif;font-weight:400;line-height:1.55;font-size:19px!important}[dir=rtl] .z-practice-scratch .z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content{font-family:inherit}.z-practice-scratch .z-pdf-sticky-focus-toolbar{grid-area:tools}.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools{background:0 0;border:0;gap:6px;padding:0}.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools>button,.z-practice-scratch .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-ink-swatch{width:40px;min-width:40px;height:40px;color:var(--z-desk-text);cursor:pointer;background:0 0;border:0;border-radius:8px;place-items:center;padding:0;display:grid}.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools>button svg{width:19px;height:19px}.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools>button:not(:disabled):hover,.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-ink-swatches.widths button.z-pdf-sticky-ink-swatch:hover{background:var(--z-desk-hover);color:var(--z-desk-text)}.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools>button.active,.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools>button.active:hover,.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-ink-swatches.widths button.z-pdf-sticky-ink-swatch.active{background:var(--z-desk-gold);color:var(--z-desk-gold-on);box-shadow:none}.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools>button.active:after{display:none}.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools>button:disabled,.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools>button:disabled:hover{color:var(--z-desk-faint);opacity:1;background:0 0}.z-practice-scratch .z-pdf-sticky-ink-option{display:none}.z-practice-scratch .z-pdf-sticky-tool-divider,.z-practice-scratch .z-pdf-sticky-ink-swatches:before{background:var(--z-desk-border-strong);width:1px;height:24px;margin-inline:6px}.z-practice-scratch .z-pdf-sticky-ink-swatches{align-items:center;gap:2px;display:inline-flex}.z-practice-scratch .z-pdf-sticky-ink-swatches:before{content:"";flex:none}.z-practice-scratch .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-ink-swatches:not(.widths) button.z-pdf-sticky-ink-swatch{width:36px;min-width:36px}.z-practice-scratch .z-pdf-sticky-ink-swatches:not(.widths) .z-pdf-sticky-ink-swatch>span{outline:1px solid var(--z-desk-border-strong);outline-offset:3px;border-radius:50%;width:22px;height:22px}.z-practice-scratch .z-pdf-sticky-ink-swatches:not(.widths) .z-pdf-sticky-ink-swatch.active>span{outline:2px solid var(--z-desk-gold)}.z-practice-scratch .z-pdf-sticky-ink-swatches.widths .z-pdf-sticky-ink-swatch>span{background:currentColor;border-radius:999px;width:18px}}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-focus-back,:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-focus-back:hover{color:var(--z-desk-text)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus>header .z-pdf-sticky-focus-controls>button{color:var(--z-desk-text);border-color:#eee8dc29}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus>header .z-pdf-sticky-focus-controls>button:hover{color:var(--z-desk-text);background:#eee8dc14;border-color:#eee8dc47}.z-note-tutor-menu{z-index:60;border:1px solid var(--z-desk-border-strong);background:var(--z-desk-charcoal);color:var(--z-desk-text);box-shadow:var(--z-desk-shadow);border-radius:14px;gap:8px;padding:16px;display:grid;position:fixed}.z-note-tutor-menu>strong{font:500 17px/1.3 var(--z-font-display), Georgia, serif;margin-block-end:2px}[dir=rtl].z-note-tutor-menu>strong{font-family:inherit}.z-note-tutor-menu>button{border:1px solid var(--z-desk-border);background:var(--z-desk-panel);min-height:44px;color:var(--z-desk-text);font:500 14px/1.3 var(--z-font-sans);text-align:start;cursor:pointer;border-radius:10px;gap:2px;padding:10px 14px;display:grid}.z-note-tutor-menu>button:not(:disabled):hover{border-color:var(--z-desk-gold-border)}.z-note-tutor-menu>button.primary{background:var(--z-desk-gold);color:var(--z-desk-gold-on);border-color:#0000;font-weight:600}.z-note-tutor-menu>button:disabled{color:var(--z-desk-faint);cursor:default}@media (min-width:641px){.z-note-tutor-menu>button[data-tutor-menu=visualize]{display:none}}@media (max-width:640px){.z-pdf-sticky-visualization-command.in-tutor-menu{display:none!important}}.z-note-tutor-menu>button small{color:var(--z-desk-muted);font-size:12px}.z-note-tutor-menu-ask{border:1px solid var(--z-desk-border);background:var(--z-desk-night);border-radius:10px;align-items:center;gap:8px;margin-block-start:4px;padding-block:6px;padding-inline:14px 6px;display:flex}.z-note-tutor-menu-ask:focus-within{border-color:var(--z-desk-gold-border)}.z-note-tutor-menu-ask input{min-width:0;color:var(--z-desk-text);font:14px/1.4 var(--z-font-sans);background:0 0;border:0;outline:none;flex:1}.z-note-tutor-menu-ask input::placeholder{color:var(--z-desk-faint)}.z-note-tutor-menu-ask button{background:var(--z-desk-gold);width:30px;height:30px;color:var(--z-desk-gold-on);cursor:pointer;border:0;border-radius:50%;flex:none;place-items:center;display:grid}.z-note-tutor-menu-ask button:disabled{opacity:.45;cursor:default}.z-note-tutor-menu-ask svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:14px;height:14px}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus>header .z-pdf-sticky-focus-controls>button.z-pdf-sticky-tutor-tile:hover{background:var(--z-desk-charcoal);border-color:#eee8dc4d}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-focus-ink-tools{background:#eee8dc0f;border-color:#eee8dc24}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button,:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-option>summary{color:var(--z-desk-text)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button:hover,:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-option[open]>summary,:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-option>summary:hover{color:var(--z-desk-text);background:#eee8dc1f}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button.active,:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button.active:hover{background:var(--z-desk-gold);color:var(--z-desk-gold-on);box-shadow:none}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button.active:after{display:none}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button:disabled{opacity:1;color:#eee8dc61}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-focus-ink-tools>button:disabled:hover{color:#eee8dc61;background:0 0}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-tool-divider{background:#eee8dc47}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-ink-color-current{border-color:var(--z-desk-text);box-shadow:0 0 0 1px #eee8dcb8}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-ink-width-current{background:var(--z-desk-text)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-study-audio{color:var(--z-desk-text);background:#eee8dc0f;border-color:#eee8dc24}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-study-audio-title small{color:var(--z-desk-muted)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-study-audio-main{background:var(--z-desk-gold)!important;color:var(--z-desk-gold-on)!important}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-share-command{width:34px;min-width:34px;padding-inline:0}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus header button.primary,:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus header button.primary:hover{border-color:var(--z-desk-gold);background:var(--z-desk-gold);color:var(--z-desk-gold-on)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-source{background:var(--z-desk-paper);color:var(--z-desk-ink-text);border-bottom-color:#17150f1a}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-work-area{background:var(--z-console-focus-panel-raised);border-color:#17150f14;margin:0 12px 12px}@media (min-width:641px){.z-practice-scratch .z-pdf-sticky-card.composer.focus .z-pdf-sticky-work-area{border-color:var(--z-desk-paper-edge);background:var(--z-desk-paper);border-radius:12px;grid-area:work;margin:0;box-shadow:0 18px 40px #00000042}}.z-practice-tutor{z-index:14;border:1px solid var(--z-console-focus-border-strong);background:var(--z-console-focus-panel-raised);width:min(360px,100% - 28px);max-height:calc(100% - 92px);color:var(--z-console-focus-text);box-shadow:var(--z-console-focus-shadow);border-radius:18px;grid-template-rows:auto minmax(0,1fr) auto;display:grid;position:absolute;inset-block-start:78px;inset-inline-end:14px;overflow:hidden}.z-practice-tutor>header{border-bottom:1px solid var(--z-console-focus-border);justify-content:space-between;align-items:center;padding:12px 14px;display:flex}.z-practice-tutor>header>span{align-items:center;gap:9px;display:inline-flex}.z-practice-tutor>header img{border-radius:6px}.z-practice-tutor>header strong{font:760 11px/1.2 var(--z-font-mono), ui-monospace, monospace;letter-spacing:.08em}.z-practice-tutor>header button{border:1px solid var(--z-console-focus-border);width:30px;height:30px;color:var(--z-console-focus-muted);cursor:pointer;background:0 0;border-radius:9px}.z-practice-tutor-body{color:var(--z-console-focus-text);padding:16px;font-size:13px;line-height:1.6;overflow:auto}.z-chat-frame .z-practice-tutor-body .z-markdown-response,.z-chat-frame .z-practice-tutor-body .z-markdown-response p,.z-chat-frame .z-practice-tutor-body .z-markdown-response li,.z-chat-frame .z-practice-tutor-body .z-markdown-response h1,.z-chat-frame .z-practice-tutor-body .z-markdown-response h2,.z-chat-frame .z-practice-tutor-body .z-markdown-response h3,.z-chat-frame .z-practice-tutor-body .z-markdown-response h4,.z-chat-frame .z-practice-tutor-body .z-markdown-response strong,.z-chat-frame .z-practice-tutor-body .z-markdown-response em,.z-chat-frame .z-practice-tutor-body .z-markdown-response span,.z-chat-frame .z-practice-tutor-body .z-markdown-response .katex,.z-chat-frame .z-practice-tutor-body .z-markdown-response .katex *{color:var(--z-console-focus-text)!important}.z-chat-frame .z-practice-tutor-body .z-markdown-response blockquote,.z-chat-frame .z-practice-tutor-body .z-markdown-response small,.z-chat-frame .z-practice-tutor-body .z-markdown-response figcaption{color:var(--z-console-focus-muted)!important}.z-chat-frame .z-practice-tutor-body .z-markdown-response a{color:var(--z-console-accent)!important}@supports (color:color-mix(in lab, red, red)){.z-chat-frame .z-practice-tutor-body .z-markdown-response a{color:color-mix(in srgb, var(--z-console-accent) 72%, var(--z-console-focus-text))!important}}.z-markdown-response p.z-reading-refs,.z-chat-frame .z-markdown-response p.z-reading-refs,.z-chat-frame .z-practice-tutor-body .z-markdown-response p.z-reading-refs{flex-wrap:wrap;align-items:center;gap:4px;margin-top:6px;display:flex;font-size:11px!important;font-weight:500!important;line-height:1.4!important}.z-markdown-response p.z-reading-refs>span,.z-chat-frame .z-markdown-response p.z-reading-refs>span,.z-chat-frame .z-practice-tutor-body .z-markdown-response p.z-reading-refs>span{color:var(--z-console-focus-muted,currentColor)!important;font-size:11px!important;font-weight:500!important}.z-markdown-response a.z-reading-ref,.z-chat-frame .z-markdown-response a.z-reading-ref,.z-chat-frame .z-practice-tutor-body .z-markdown-response a.z-reading-ref{border:1px solid var(--z-console-accent);justify-content:center;align-items:center;min-width:16px;height:16px;padding:0 4px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.z-markdown-response a.z-reading-ref,.z-chat-frame .z-markdown-response a.z-reading-ref,.z-chat-frame .z-practice-tutor-body .z-markdown-response a.z-reading-ref{border:1px solid color-mix(in srgb, var(--z-console-accent) 45%, transparent)}}.z-markdown-response a.z-reading-ref,.z-chat-frame .z-markdown-response a.z-reading-ref,.z-chat-frame .z-practice-tutor-body .z-markdown-response a.z-reading-ref{border-radius:999px;text-decoration:none;font-size:10px!important;font-weight:700!important;line-height:1!important}:is(.z-markdown-response a.z-reading-ref:hover,.z-markdown-response a.z-reading-ref:focus-visible){background:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){:is(.z-markdown-response a.z-reading-ref:hover,.z-markdown-response a.z-reading-ref:focus-visible){background:color-mix(in srgb, var(--z-console-accent) 16%, transparent)}}.z-practice-tutor-body>p:first-child{margin-top:0}.z-practice-tutor-progress{color:var(--z-console-focus-muted);font-weight:650}.z-practice-verified{border:1px solid var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-practice-verified{border:1px solid color-mix(in srgb, var(--z-console-accent) 48%, var(--z-console-focus-border))}}.z-practice-verified{background:var(--z-console-accent);border-radius:9px}@supports (color:color-mix(in lab, red, red)){.z-practice-verified{background:color-mix(in srgb, var(--z-console-accent) 10%, var(--z-console-focus-panel-raised))}}.z-practice-verified{padding:10px 12px}.z-practice-actions{border-top:1px solid var(--z-console-focus-border);flex-wrap:wrap;gap:7px;padding:12px;display:flex}.z-practice-tutor .z-practice-actions button{border-color:var(--z-console-focus-border);color:var(--z-console-focus-text);background:0 0;font-size:11px}.z-practice-error{z-index:20;color:var(--z-console-danger);margin:12px 0;position:relative}@media (max-width:1100px){.z-practice-library-layout{grid-template-columns:minmax(0,1fr)}.z-practice-folio{grid-template-columns:280px minmax(0,1fr)}}@media (max-width:760px){.z-practice-shell.z-chat-frame{flex-direction:column!important;display:flex!important}.z-practice-main{padding:24px 14px 48px}.z-practice-resume span{display:none}.z-practice-study-card .z-practice-search{width:100%;min-width:0}.z-practice-folio{grid-template-columns:1fr}.z-practice-contents{border-inline-end:0;border-bottom:1px solid #ffffff12}.z-practice-contents-meta{display:none}.z-practice-contents-sticky{max-height:none;position:static;overflow:visible}.z-practice-contents nav{align-items:stretch;gap:6px;padding-bottom:4px;display:flex;overflow:auto}.z-practice-chapter:not(.has-progress){align-self:center}.z-practice-chapter{white-space:nowrap}.z-practice-chapter.has-progress{white-space:normal;min-width:168px}.z-practice-chapter-label{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.z-practice-search{width:100%}.z-practice-study-card .z-practice-problem-row{grid-template-columns:30px minmax(0,1fr) auto;gap:9px;min-height:0;padding:12px 4px}.z-practice-study-card .z-practice-problem-row>span:nth-of-type(3){display:grid}.z-practice-status-mark{width:23px;height:23px}.z-practice-main.problem-active{padding:8px}.z-practice-problem-head{align-items:flex-start;padding-bottom:8px}.z-practice-problem-context{flex-wrap:wrap;gap:5px 8px}.z-practice-loading-scratch{grid-template-rows:minmax(112px,.2fr) minmax(0,1fr)}.z-practice-tutor{width:auto;max-height:calc(100% - 116px);inset-block-start:108px;inset-inline:8px}}.z-practice-share-backdrop{z-index:80;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#0f11137a;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.z-practice-share-sheet{border:1px solid var(--z-console-border-strong);background:var(--z-console-panel-raised);width:min(560px,100%);max-height:min(760px,100dvh - 32px);box-shadow:var(--z-shadow-frame);color:var(--z-console-text);border-radius:18px;padding:22px;overflow:auto}.z-practice-share-sheet>header,.z-practice-share-sheet>footer{justify-content:space-between;align-items:center;gap:10px;display:flex}.z-practice-share-sheet>header span{color:var(--z-console-muted);font:600 .68rem/1 var(--font-geist-mono), monospace;letter-spacing:.12em;text-transform:uppercase}.z-practice-share-sheet h2{margin:5px 0 0;font-size:1.2rem}.z-practice-share-sheet>p{color:var(--z-console-muted);line-height:1.55}.z-practice-share-sheet>header>button{color:inherit;background:0 0;border:0;font-size:1.5rem}.z-practice-share-sheet fieldset{border:0;gap:9px;margin:18px 0;padding:0;display:grid}.z-practice-share-sheet legend{margin-bottom:8px;font-weight:650}.z-practice-share-sheet label{border:1px solid var(--z-console-border);background:var(--z-console-panel);cursor:pointer;border-radius:12px;gap:10px;padding:12px;display:flex}.z-practice-share-sheet label:has(input:checked){border-color:var(--z-console-accent);box-shadow:inset 0 0 0 1px var(--z-console-accent)}.z-practice-share-sheet label span{gap:3px;display:grid}.z-practice-share-sheet label small{color:var(--z-console-muted)}.z-practice-share-sheet label.z-practice-share-question{cursor:text;gap:8px;margin:0 0 14px;display:grid}.z-practice-share-question textarea{resize:vertical;border:1px solid var(--z-console-border);background:var(--z-console-input);width:100%;min-height:92px;color:inherit;font:inherit;border-radius:10px;padding:10px 12px;line-height:1.5}.z-practice-share-question textarea:focus-visible{outline:2px solid var(--z-console-accent);outline-offset:1px}.z-practice-share-preview{border:1px solid var(--z-console-border);background:var(--z-console-input);border-radius:12px;min-height:150px;display:grid;overflow:hidden}.z-practice-share-preview>span{border-bottom:1px solid var(--z-console-border);background:var(--z-console-panel);color:var(--z-console-muted);font:650 .68rem var(--z-font-mono), ui-monospace, monospace;letter-spacing:.06em;text-transform:uppercase;padding:8px 11px}.z-practice-share-preview img{object-fit:contain;width:100%;max-height:220px}.z-practice-share-preview>div{min-height:130px;color:var(--z-console-muted);place-content:center;place-items:center;gap:5px;display:grid}.z-practice-share-preview>div strong{color:var(--z-console-text);font:500 2rem Fraunces,serif}.z-practice-share-link-state{background:var(--z-console-panel);border-radius:12px;gap:8px;margin:16px 0;padding:12px;display:grid}.z-practice-share-link-state input{border:1px solid var(--z-console-border);background:var(--z-console-input);width:100%;color:var(--z-console-text);border-radius:8px;padding:9px}.z-practice-share-sheet footer{flex-wrap:wrap;justify-content:flex-end;margin-top:20px}.z-practice-share-sheet footer button{border:1px solid var(--z-console-border-strong);background:var(--z-console-panel);min-height:38px;color:var(--z-console-text);border-radius:8px;padding:0 14px}.z-practice-share-sheet footer button.primary{border-color:var(--z-console-accent);background:var(--z-console-accent);color:var(--z-console-accent-on)}.z-practice-share-sheet footer button.danger{color:var(--z-console-danger)}.z-practice-share-error{color:var(--z-console-danger)!important}@media (max-width:640px){.z-practice-share-backdrop{align-items:end;padding:0}.z-practice-share-sheet{border-radius:18px 18px 0 0;width:100%;max-height:88dvh}}.z-pdf-sticky-ink-immutable-base{mix-blend-mode:multiply;pointer-events:none;-webkit-user-select:none;user-select:none;width:100%;max-width:100%;height:auto;position:absolute;top:0;left:0}.z-shared-workbench-loading{background:var(--z-console-bg);min-height:100dvh;color:var(--z-console-text);place-items:center;padding:24px;display:grid}.z-shared-practice-workbench{grid-template-columns:1fr!important}.z-shared-practice-workbench .z-practice-main{grid-column:1}.z-shared-practice-limits{min-width:min(340px,100%)}.z-shared-practice-limits>header{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.z-shared-practice-limits>header>div{flex:1;gap:3px;display:grid}.z-shared-practice-limits>header>div span{color:var(--z-console-muted)}.z-shared-practice-reviewing{animation:1.4s ease-in-out infinite z-shared-practice-pulse}@keyframes z-shared-practice-pulse{50%{opacity:.45}}@media (prefers-reduced-motion:reduce){.z-shared-practice-reviewing{animation:none}}.z-shared-practice-panel-toggle{z-index:14;border:1px solid var(--z-desk-border-strong);background:var(--z-desk-charcoal);min-height:30px;color:var(--z-desk-text);font:600 11px/1 var(--z-font-mono), ui-monospace, monospace;letter-spacing:.06em;text-transform:uppercase;cursor:pointer;border-radius:8px;padding:0 12px;position:absolute;inset-block-start:78px;inset-inline-end:14px;box-shadow:0 6px 16px #17150f2e}[dir=rtl] .z-shared-practice-panel-toggle{letter-spacing:0;text-transform:none;font-family:inherit;font-size:13px}.z-shared-practice-panel-toggle:hover{border-color:var(--z-desk-gold-border);color:var(--z-desk-gold-soft)}.z-shared-practice-panel-toggle:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:2px}.z-guest-turnstile{justify-content:center;display:flex}.z-guest-turnstile:not(:empty){padding:8px 0}.z-guest-practice-keep-going p{color:var(--z-console-muted);flex-basis:100%;margin:0 0 2px;font-size:13px;line-height:1.5}.z-shared-practice-limits>header span,.z-shared-practice-limits>p{color:var(--z-console-muted)}.z-shared-practice-limits>p,.z-shared-practice-limits>.z-markdown-response,.z-shared-practice-limits>button{margin:0;padding-inline:16px}.z-shared-practice-limits>p:first-of-type{padding-top:14px}.z-shared-practice-limits>:last-child:not(header){margin-bottom:16px}.z-practice-study-card .z-practice-problem-row{grid-template-columns:24px minmax(0,1fr) 18px;align-items:start;gap:12px;padding:12px 4px}.z-practice-study-card .z-practice-row-title{gap:3px}.z-practice-row-title .z-practice-row-name{color:var(--z-desk-ink-text);font-family:var(--z-font-display), Georgia, serif;white-space:normal;font-size:15px;font-weight:500;line-height:1.35;overflow:visible}[dir=rtl] .z-practice-row-title .z-practice-row-name{font-family:inherit;font-weight:600}.z-practice-study-card .z-practice-row-math{color:#5f584d;-webkit-line-clamp:2;white-space:normal;-webkit-box-orient:vertical;font-family:inherit;font-size:13px;line-height:1.55;display:-webkit-box;overflow:hidden}.z-practice-study-card .z-practice-row-meta{color:var(--z-desk-faint);gap:6px 12px;margin-top:3px;font-size:11.5px}.z-practice-topic-tag{color:var(--z-desk-gold-deep);font-weight:600}.z-practice-study-card .z-practice-status-mark{margin-top:2px}.z-practice-study-card .z-practice-status-mark.active{border-color:var(--z-desk-ink-text);background:linear-gradient(90deg, var(--z-desk-ink-text) 50%, transparent 50%);color:#0000}[dir=rtl] .z-practice-study-card .z-practice-status-mark.active{background:linear-gradient(270deg, var(--z-desk-ink-text) 50%, transparent 50%)}.z-practice-study-card .z-practice-status-mark.reviewed{border-color:var(--z-desk-rust-ink);color:var(--z-desk-rust-ink)}.z-practice-study-card .z-practice-problem-go{width:18px;height:18px;color:var(--z-desk-gold-deep);opacity:0;border:0;margin-top:4px;transition:opacity .12s,transform .12s}:is(.z-practice-study-card .z-practice-problem-row:hover .z-practice-problem-go,.z-practice-study-card .z-practice-problem-row:focus-visible .z-practice-problem-go){opacity:1;transform:translate(2px)}[dir=rtl] .z-practice-study-card .z-practice-problem-go{transform:scaleX(-1)}:is([dir=rtl] .z-practice-study-card .z-practice-problem-row:hover .z-practice-problem-go,[dir=rtl] .z-practice-study-card .z-practice-problem-row:focus-visible .z-practice-problem-go){transform:scaleX(-1)translate(2px)}.z-practice-study-card .z-practice-problem-row.recommended{border:1px solid #17150f1a;border-inline-start:3px solid var(--z-desk-gold);background:#ffffff80;border-radius:10px;margin:6px 0 4px;padding:16px 16px 16px 14px}[dir=rtl] .z-practice-study-card .z-practice-problem-row.recommended{padding:16px 14px 16px 16px}.z-practice-study-card .z-practice-problem-row.recommended:hover{background:#ffffffb3;margin:6px 0 4px}.z-practice-study-card .z-practice-problem-row.recommended .z-practice-problem-go{opacity:1}.z-practice-row-reason{color:var(--z-desk-gold-deep);font-size:12px;font-weight:600}.z-practice-study-card .z-practice-problem-row:not(:has(.z-practice-status-mark.independent,.z-practice-status-mark.assisted,.z-practice-status-mark.reviewed,.z-practice-status-mark.active)) .z-practice-status-mark{border-color:var(--z-practice-chapter-color,#c69a38)}@supports (color:color-mix(in lab, red, red)){.z-practice-study-card .z-practice-problem-row:not(:has(.z-practice-status-mark.independent,.z-practice-status-mark.assisted,.z-practice-status-mark.reviewed,.z-practice-status-mark.active)) .z-practice-status-mark{border-color:color-mix(in srgb, var(--z-practice-chapter-color,#c69a38) 55%, transparent)}}.z-practice-study-card .z-practice-problem-row:not(:has(.z-practice-status-mark.independent,.z-practice-status-mark.assisted,.z-practice-status-mark.reviewed,.z-practice-status-mark.active)) .z-practice-status-mark{background:var(--z-practice-chapter-color,#c69a38)}@supports (color:color-mix(in lab, red, red)){.z-practice-study-card .z-practice-problem-row:not(:has(.z-practice-status-mark.independent,.z-practice-status-mark.assisted,.z-practice-status-mark.reviewed,.z-practice-status-mark.active)) .z-practice-status-mark{background:color-mix(in srgb, var(--z-practice-chapter-color,#c69a38) 14%, transparent)}}.z-practice-study-card .z-practice-diff{color:var(--z-desk-faint);gap:0;font-size:12px;font-weight:500}.z-practice-study-card .z-practice-diff:before{display:none}.z-practice-study-card .z-practice-diff.medium,.z-practice-study-card .z-practice-diff.hard{color:var(--z-desk-ink-text);font-weight:600}.z-practice-textbook-link{color:var(--z-desk-gold-deep);text-underline-offset:4px;align-items:center;gap:7px;margin-top:10px;font-size:13px;font-weight:600;display:inline-flex}@media (max-width:720px){.z-practice-study-card .z-practice-problem-row{grid-template-columns:22px minmax(0,1fr) 14px;gap:10px}.z-practice-study-card .z-practice-problem-go{opacity:.6}}.z-practice-textbook-link svg{flex:0 0 18px;width:18px;height:18px}.z-practice-section+.z-practice-section,.z-practice-problem-row+.z-practice-section{margin-top:18px}.z-practice-section-head{border-bottom:1px solid #17150f29;justify-content:space-between;align-items:flex-end;gap:12px;padding:8px 0;display:flex}.z-practice-section-head h4{color:var(--z-desk-ink-text);font-family:var(--z-font-display), Georgia, serif;align-items:baseline;gap:10px;margin:0;font-size:1.02rem;font-weight:500;line-height:1.3;display:flex}[dir=rtl] .z-practice-section-head h4{font-family:inherit;font-weight:600}.z-practice-section-number{color:var(--z-desk-gold-deep);font-variant-numeric:tabular-nums;font-size:.9em}.z-practice-section-book{color:#746c60;letter-spacing:.04em;margin-bottom:2px;font-size:11px;display:block}.z-practice-section-read{color:var(--z-desk-gold-deep);text-underline-offset:4px;flex:none;align-items:center;gap:6px;font-size:12.5px;font-weight:600;display:inline-flex}.z-practice-section-read svg{flex:0 0 16px;width:16px;height:16px}@media (max-width:720px){.z-practice-section-head{flex-direction:column;align-items:flex-start;gap:4px}}.z-practice-pro{background:radial-gradient(ellipse at center, #13100ce6, #13100c26 70%), url(/practice/pro-chalkboard.jpg) center / cover no-repeat, var(--z-desk-night);min-height:100%;color:var(--z-desk-text);place-items:center;padding:40px 24px;display:grid;position:relative}.z-practice-pro-card{gap:18px;width:min(100%,460px);display:grid}.z-practice-pro-eyebrow{color:var(--z-desk-gold-soft);letter-spacing:.14em;text-transform:uppercase;margin:0;font-size:12px;font-weight:600}.z-practice-pro h1{font-family:var(--font-fraunces,serif);margin:0;font-size:clamp(34px,5vw,46px);font-weight:500;line-height:1.1}.z-practice-pro-sub{color:var(--z-desk-muted);margin:0;line-height:1.6}.z-practice-pro ul{gap:14px;margin:4px 0;padding:0;list-style:none;display:grid}.z-practice-pro li{border-inline-start:2px solid var(--z-desk-gold-border);gap:3px;padding-inline-start:14px;display:grid}.z-practice-pro li span{color:var(--z-desk-muted);font-size:13px}.z-practice-pro-cta{background:var(--z-desk-gold);min-height:48px;color:var(--z-desk-gold-on);border-radius:12px;place-items:center;font-weight:600;text-decoration:none;display:grid}.z-practice-pro-cta:hover{background:var(--z-desk-gold-hover)}.z-practice-pro-note{color:var(--z-desk-muted);text-align:center;margin:0;font-size:12px}.z-practice-pro-back{min-height:44px;color:var(--z-desk-text);font:inherit;text-align:center;cursor:pointer;background:0 0;border:0;font-size:14px}.z-paste-question{gap:14px;display:grid}.z-paste-question>p,.z-paste-question h2{margin:0}.z-paste-question-drop{border:1px dashed var(--z-desk-gold-border);background:var(--z-console-input);min-height:112px;color:var(--z-console-text);font:inherit;cursor:pointer;border-radius:12px;place-content:center;justify-items:center;gap:4px;display:grid}:is(.z-paste-question-drop:hover,.z-paste-question-drop:focus-visible){background:#c69a3814;border-style:solid}.z-paste-question-drop strong{color:var(--z-desk-gold-soft);font-weight:600}.z-paste-question-drop span{color:var(--z-console-muted);font-size:12.5px}.z-paste-question-preview{border:1px solid var(--z-console-border);background:var(--z-console-input);border-radius:12px;padding:14px 16px;font-size:15px;line-height:1.6;overflow-x:auto}.z-practice-share-sheet label.z-paste-question-field{cursor:text;background:0 0;border:0;gap:6px;padding:0;display:grid}.z-paste-question-field>span{color:var(--z-console-muted);font-size:12.5px}.z-paste-question-field textarea{resize:vertical;border:1px solid var(--z-console-border);background:var(--z-console-input);width:100%;color:inherit;font:inherit;border-radius:10px;padding:10px 12px;font-size:13.5px;line-height:1.5}.z-paste-question-field textarea:focus-visible{outline:2px solid var(--z-console-accent);outline-offset:1px}.z-paste-question>footer{margin-top:0}.z-paste-question>footer button:disabled{opacity:.5;cursor:not-allowed}.z-paste-question-fix{color:var(--z-desk-gold-soft);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;justify-self:start;margin-top:-6px;padding:0;font-size:12.5px;text-decoration:underline}.z-chat-frame{padding-top:calc(var(--tg-safe-area-inset-top,0px) + var(--tg-content-safe-area-inset-top,0px))}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus header a.z-pdf-sticky-app-command{min-width:34px;height:34px;color:var(--z-desk-text,#eee4ce);white-space:nowrap;border:1px solid #eee4ce2e;border-radius:10px;justify-content:center;align-items:center;gap:6px;padding:0 11px;font-size:12.5px;font-weight:650;text-decoration:none;display:inline-flex}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus header a.z-pdf-sticky-app-command:hover{background:#eee4ce14}@media (max-width:1180px){.z-pdf-sticky-app-command{padding:0}.z-pdf-sticky-app-command span{display:none}}.z-paste-question>.z-paste-question-hint{color:var(--z-console-muted,inherit);font-size:13px}.z-coach-marks{z-index:13;border:1px solid var(--z-console-focus-border-strong);background:var(--z-console-focus-panel-raised);width:max-content;max-width:calc(100% - 32px);color:var(--z-console-focus-text);box-shadow:var(--z-console-focus-shadow);border-radius:999px;align-items:center;gap:14px;margin-inline:auto;padding:8px 8px 8px 16px;font-size:13px;display:flex;position:absolute;inset-block-end:54px;inset-inline:0}.z-coach-marks ol{flex-wrap:wrap;gap:6px 16px;margin:0;padding:0;list-style:none;display:flex}.z-coach-marks li{align-items:center;gap:8px;display:flex}.z-coach-marks li span{background:var(--z-desk-gold);width:20px;height:20px;color:var(--z-desk-ink);border-radius:50%;place-items:center;font-size:12px;font-weight:600;display:grid}.z-coach-marks button{color:inherit;font:inherit;cursor:pointer;background:0 0;border:0;border-radius:999px;padding:6px 12px;text-decoration:underline}@media (max-width:560px){.z-coach-marks{border-radius:16px;inset-block-end:124px}}.z-coach-tour{z-index:160;pointer-events:none;position:fixed;inset:0}.z-coach-tour-ring{border:2px solid var(--z-desk-gold);box-shadow:0 0 0 4px var(--z-desk-gold-wash);border-radius:12px;transition:left .2s,top .2s,width .2s,height .2s;animation:1.8s ease-in-out infinite z-coach-tour-pulse;position:fixed}.z-coach-tour-card{background:var(--z-desk-panel-raised);color:var(--z-desk-text);pointer-events:auto;border:1px solid #c69a388c;border-radius:12px;gap:6px;padding:14px 16px 12px;animation:.2s both z-coach-tour-in;display:grid;position:fixed;box-shadow:0 16px 44px #17150f66}.z-coach-tour-step{color:var(--z-desk-gold);font-size:11.5px;font-weight:600}.z-coach-tour-card strong{font-family:var(--z-font-display), Georgia, serif;font-size:17px;font-weight:600}[dir=rtl] .z-coach-tour-card strong{font-family:inherit}.z-coach-tour-card p{color:#cfc7b8;margin:0;font-size:13.5px;line-height:1.45}.z-coach-tour-actions{justify-content:space-between;align-items:center;margin-block-start:6px;display:flex}.z-coach-tour-actions button{-webkit-appearance:none;appearance:none;min-height:30px;color:var(--z-desk-muted);font:inherit;cursor:pointer;background:0 0;border:0;border-radius:8px;padding:0 12px;font-size:13px}.z-coach-tour-actions button.primary{background:var(--z-desk-gold);color:var(--z-desk-gold-on);font-weight:600}.z-coach-tour-actions button.primary:hover{background:var(--z-desk-gold-hover)}.z-coach-tour-actions button.quiet:hover{color:var(--z-desk-text)}@keyframes z-coach-tour-pulse{50%{box-shadow:0 0 0 8px var(--z-desk-gold-wash)}}@keyframes z-coach-tour-in{0%{opacity:0;transform:translateY(4px)}}@media (prefers-reduced-motion:reduce){.z-coach-tour-ring,.z-coach-tour-card{transition:none;animation:none}}.z-pdf-sticky-ink-filter-defs{width:0;height:0;position:absolute;overflow:hidden}.z-scratch-chat{border-top:1px solid var(--z-console-focus-border);gap:10px;margin-block-start:14px;padding-block-start:12px;display:grid}.z-scratch-chat-messages{gap:10px;margin:0;padding:0;list-style:none;display:grid}.z-scratch-chat-messages li.user{background:var(--z-console-focus-panel);border-radius:12px;justify-self:end;max-width:88%;padding:7px 11px}.z-scratch-chat-messages li.user p{white-space:pre-wrap;margin:0}.z-scratch-chat-messages li.tutor,.z-scratch-chat-messages li.review,.z-scratch-chat-messages li.hint{border-inline-start:2px solid var(--z-console-focus-border-strong);padding-inline-start:10px}.z-scratch-chat-messages li.hint{border-inline-start-color:var(--z-desk-gold)}.z-scratch-chat-messages li.review.correct{border-inline-start-color:var(--z-desk-verified)}.z-scratch-chat-verdict{background:var(--z-desk-verified);border-radius:8px;margin:0 0 8px}@supports (color:color-mix(in lab, red, red)){.z-scratch-chat-verdict{background:color-mix(in srgb, var(--z-desk-verified) 18%, transparent)}}.z-scratch-chat-verdict{color:var(--z-desk-verified);padding:6px 10px;font-weight:600}.z-scratch-chat-messages li.pending{color:var(--z-console-focus-muted);font-size:12px}.z-scratch-chat-composer{align-items:flex-end;gap:8px;display:flex}.z-scratch-chat-composer textarea{resize:none;border:1px solid var(--z-console-focus-border);min-height:36px;max-height:120px;color:var(--z-console-focus-text);font:inherit;background:0 0;border-radius:10px;flex:1;padding:8px 10px}.z-scratch-chat-composer textarea:focus{border-color:var(--z-desk-gold-border);outline:none}.z-scratch-chat-composer button{background:var(--z-desk-gold);color:var(--z-desk-gold-on);cursor:pointer;border:0;border-radius:10px;padding:8px 12px;font-weight:650}.z-scratch-chat-composer button:disabled{opacity:.45;cursor:default}.z-practice-first-intro{border-block-end:1px dashed var(--z-desk-paper-edge);color:var(--z-desk-ink-text);gap:4px;padding-block-end:10px;display:grid}.z-practice-first-intro-head{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.z-practice-first-intro-head span{color:var(--z-desk-gold-deep);letter-spacing:.12em;text-transform:uppercase;font-size:11px;font-weight:700}:lang(ar) .z-practice-first-intro-head span,[dir=rtl] .z-practice-first-intro-head span{letter-spacing:0;font-size:13px}.z-practice-first-intro-head button{border:1px solid var(--z-desk-gold-deep);background:var(--z-desk-gold);color:var(--z-desk-gold-on);white-space:nowrap;cursor:pointer;border-radius:999px;flex:none;padding:6px 14px;font-size:13px;font-weight:700;transition:background .12s}:is(.z-practice-first-intro-head button:hover,.z-practice-first-intro-head button:focus-visible){background:var(--z-desk-gold-hover)}.z-practice-first-intro-head{align-items:center}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source .z-practice-first-intro p{font-family:var(--z-font-sans);letter-spacing:0;color:var(--z-desk-ink-text);margin:0;font-size:14px;font-style:normal;font-weight:400;line-height:1.45}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-source .z-practice-first-intro p{color:color-mix(in srgb, var(--z-desk-ink-text) 70%, transparent)}}.z-subject-picker{margin-bottom:14px}.z-subject-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;display:grid}.z-subject-card{-webkit-appearance:none;appearance:none;border:1px solid var(--z-desk-border);background:var(--z-desk-charcoal);min-height:0;color:var(--z-desk-text);text-align:start;cursor:pointer;border-radius:10px;grid-template-columns:clamp(104px,10vw,140px) minmax(0,1fr);align-items:center;padding:0;transition:border-color .15s;display:grid;overflow:hidden}.z-subject-card:hover:not(:disabled){border-color:#d8cab047}.z-subject-card.active{border-color:var(--z-desk-gold-border);box-shadow:0 0 0 1px #c69a3840}.z-subject-card.soon{cursor:default}.z-subject-card-cover{min-width:0;margin:12px 4px 12px 12px;display:block}[dir=rtl] .z-subject-card-cover{margin:12px 12px 12px 4px}.z-subject-card:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:3px}.z-subject-card-body{align-content:center;gap:4px;min-width:0;padding:10px 12px 11px;display:grid}.z-subject-card-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;min-width:0;display:flex}.z-subject-card-top strong{font-family:var(--z-font-display), Georgia, serif;text-overflow:ellipsis;white-space:normal;font-size:15px;font-weight:500;line-height:1.2;overflow:hidden}[dir=rtl] .z-subject-card-top strong{font-family:inherit;font-weight:650}.z-subject-badge{color:var(--z-desk-muted);background:#eee4ce14;border-radius:999px;flex:none;padding:2px 7px;font-size:10.5px;font-style:normal;font-weight:600}.z-subject-badge.rank-apprentice,.z-subject-badge.rank-practitioner{background:var(--z-desk-gold-wash);color:var(--z-desk-gold-soft)}.z-subject-badge.rank-scholar,.z-subject-badge.rank-master{background:var(--z-desk-verified-wash);color:var(--z-desk-verified)}.z-subject-card-meta{color:var(--z-desk-faint);font-size:11.5px;line-height:1.3}.z-subject-card-track{background:#eee4ce14;border-radius:2px;height:2px;display:block}.z-subject-card-track b{border-radius:inherit;background:var(--z-desk-gold);height:100%;display:block}.z-subject-card.rank-scholar .z-subject-card-track b,.z-subject-card.rank-master .z-subject-card-track b{background:var(--z-desk-verified)}@media (max-width:1200px){.z-subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:860px){.z-subject-grid{grid-template-columns:1fr}}.z-goal-dial{flex:none;overflow:visible}.z-goal-dial .orbit{fill:none;stroke:#17150f29;stroke-width:1px}.z-goal-dial .ring{fill:none;stroke:var(--z-desk-gold);stroke-width:1.1px;opacity:.8}.z-goal-dial .planet{fill:var(--z-desk-paper-2);stroke:var(--z-desk-ink-text);stroke-width:1.1px}.z-goal-dial .planet.reached{fill:var(--z-desk-verified);stroke:var(--z-desk-sage-ink)}.z-goal-dial .bead{fill:var(--z-desk-paper);stroke:#17150f73;stroke-width:1px}.z-goal-dial .bead.solved{fill:var(--z-desk-ink-text);stroke:var(--z-desk-ink-text)}.z-goal-dial .bead.working{fill:#17150f61;stroke:var(--z-desk-ink-text)}.z-goal-dial .bead.outside{stroke-dasharray:1.2 1.2;stroke:#17150f59}.z-goal-dial .halo{fill:none;stroke:var(--z-desk-gold);stroke-width:1.4px}.z-practice-titlebar-side{flex:0 300px;justify-content:flex-end;align-items:center;gap:16px;min-width:0;display:flex}.z-practice-titlebar-side:empty{display:none}.z-practice-titlebar-side .z-goal-glance{width:100%;min-width:0}@container (width<=600px){.z-practice-problem-titlebar{flex-direction:column;align-items:stretch}.z-practice-titlebar-side{flex:none;justify-content:flex-start;width:100%}}.z-goal-glance{max-width:300px;color:var(--z-desk-ink-text);background:#ffffff8c;border:1px solid #17150f1a;border-radius:12px;align-items:center;gap:10px;padding:7px 12px 7px 8px;text-decoration:none;transition:border-color .14s,background .14s,box-shadow .14s;display:flex}:is(.z-goal-glance:hover,.z-goal-glance:focus-visible){border-color:var(--z-desk-gold-border);background:#fffc;box-shadow:0 6px 18px #4a3a1e14}.z-goal-glance.static:hover{box-shadow:none;background:#ffffff8c;border-color:#17150f1a}.z-goal-glance.empty{background:0 0;border-style:dashed}.z-goal-glance-invite{min-width:0;color:inherit;align-items:center;gap:10px;text-decoration:none;display:flex}.z-goal-glance-dismiss{color:#786f60;font:inherit;cursor:pointer;background:0 0;border:0;border-radius:6px;flex:none;margin-inline-start:4px;padding:2px 6px;font-size:16px;line-height:1}.z-goal-glance-dismiss:hover{color:var(--z-desk-ink-text);background:#17150f0f}.z-goal-glance-text{gap:1px;min-width:0;display:grid}.z-goal-glance-text em{color:#786f60;letter-spacing:.07em;text-transform:uppercase;font-size:10px;font-style:normal;font-weight:650}:lang(ar) .z-goal-glance-text em{letter-spacing:0}.z-goal-glance-text strong{font-family:var(--z-font-display), Georgia, serif;text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:500;overflow:hidden}.z-goal-glance-text small{color:#5f584d;text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.z-goal-glance-go{color:var(--z-desk-gold-deep);margin-inline-start:2px;font-size:18px;line-height:1}:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)) .z-goal-glance-go{transform:scaleX(-1)}.z-goal-page{width:min(1180px,100%);color:var(--z-desk-text);margin:0 auto;padding-bottom:32px}.z-goal-crumbs{color:var(--z-desk-muted);flex-wrap:wrap;gap:10px;margin:4px 0 22px;font-size:14px;display:flex}.z-goal-crumbs a{color:var(--z-desk-muted);text-decoration:none}.z-goal-crumbs a:hover,.z-goal-crumbs [aria-current]{color:var(--z-desk-text)}.z-goal-page-skeleton{background:var(--z-desk-panel);border-radius:14px;height:420px}.z-goal-hero{grid-template-columns:minmax(0,1fr) minmax(0,420px);align-items:end;gap:12px 40px;margin-bottom:24px;display:grid}.z-goal-hero-eyebrow,.z-goal-next-eyebrow,.z-goal-milestone-eyebrow,.z-goal-lane-label,.z-goal-eyebrow{letter-spacing:.12em;text-transform:uppercase;font-size:11px;font-weight:650}:lang(ar) :is(.z-goal-hero-eyebrow,.z-goal-next-eyebrow,.z-goal-milestone-eyebrow,.z-goal-lane-label,.z-goal-eyebrow){letter-spacing:0}.z-goal-hero-eyebrow{color:var(--z-desk-muted)}.z-goal-hero h1{font-family:var(--z-font-display), Georgia, serif;margin:8px 0 0;font-size:clamp(30px,4.4vw,46px);font-weight:500;line-height:1.1}.z-goal-hero p{color:var(--z-desk-muted);margin:0 0 6px;font-size:15px;line-height:1.6}.z-goal-banner{border:1px solid var(--z-desk-border-strong);background:var(--z-desk-panel);color:var(--z-desk-text);border-radius:10px;flex-wrap:wrap;align-items:center;gap:8px 14px;margin:0 0 16px;padding:10px 14px;font-size:13px;display:flex}.z-goal-banner button{color:var(--z-desk-text);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;font-weight:650;text-decoration:underline}.z-goal-next-card{border:1px solid var(--z-desk-border);border-inline-start:3px solid var(--z-desk-gold);background:var(--z-desk-charcoal);border-radius:12px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:16px 32px;margin-bottom:20px;padding:24px 28px;display:grid}.z-goal-next-eyebrow{color:var(--z-desk-gold-soft)}.z-goal-next-copy h2{font-family:var(--z-font-display), Georgia, serif;margin:8px 0 6px;font-size:clamp(22px,2.6vw,28px);font-weight:500;line-height:1.2}.z-goal-next-copy p{color:var(--z-desk-muted);margin:0;font-size:14px;line-height:1.55}.z-goal-next-actions{justify-items:center;gap:12px;display:grid}.z-goal-next-card .z-goal-alternatives{grid-column:1/-1}.z-goal-alternatives{gap:8px;margin:0;padding:0;list-style:none;display:grid}.z-goal-alternatives button{border:1px solid var(--z-desk-border);background:var(--z-desk-panel);width:100%;color:var(--z-desk-text);font:inherit;text-align:start;cursor:pointer;border-radius:9px;gap:2px;padding:10px 14px;display:grid}.z-goal-alternatives button:hover{border-color:var(--z-desk-border-strong)}.z-goal-alternatives strong{font-size:14px;font-weight:600}.z-goal-alternatives span{color:var(--z-desk-muted);font-size:13px}.z-goal-text-link{-webkit-appearance:none;appearance:none;color:var(--z-desk-text);font:inherit;text-decoration:underline;-webkit-text-decoration-color:var(--z-desk-border-strong);-webkit-text-decoration-color:var(--z-desk-border-strong);-webkit-text-decoration-color:var(--z-desk-border-strong);text-decoration-color:var(--z-desk-border-strong);text-underline-offset:5px;cursor:pointer;background:0 0;border:0;padding:2px 0;font-size:14px}.z-goal-text-link:hover{text-decoration-color:currentColor}.z-goal-text-link:disabled{cursor:wait;opacity:.55}.z-goal-reached{background:var(--z-desk-verified-wash);color:var(--z-desk-verified);border-radius:12px;margin:0 0 20px;padding:14px 18px;font-size:14px}.z-goal-map{border:1px solid var(--z-desk-paper-edge);background-color:var(--z-desk-paper);background-image:radial-gradient(var(--z-desk-grid) 1px, transparent 1.2px);color:var(--z-desk-ink-text);background-size:22px 22px;border-radius:14px;overflow:hidden;container-type:inline-size}.z-goal-map-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:8px 24px;padding:28px 32px 0;display:flex}.z-goal-map-head h2{color:var(--z-desk-ink-text);font-family:var(--z-font-display), Georgia, serif;margin:0;font-size:clamp(24px,3vw,32px);font-weight:500;line-height:1.15}.z-goal-map-head p{color:#5f584d;margin:6px 0 0;font-size:14px}.z-goal-order-key{color:#5f584d;align-items:center;gap:12px;padding-top:8px;font-size:13px;display:inline-flex}.z-goal-order-key:before{content:"";border-top:1.5px solid #6d6455;width:40px;height:0}.z-goal-map-body{grid-template-columns:minmax(0,1fr) 260px;align-items:center;gap:24px 48px;padding:28px 32px 8px;display:grid;position:relative}.z-goal-connectors{pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible}.z-goal-connectors path{fill:none;stroke:#6d6455;stroke-width:1.5px;stroke-linejoin:round}.z-goal-lanes{gap:32px;display:grid;position:relative}.z-goal-lane-label{color:#4a4438;align-items:center;gap:10px;margin-bottom:18px;display:flex}.z-goal-lane-label:before{background:var(--z-desk-hand-ink);content:"";border-radius:50%;width:6px;height:6px}.z-goal-lane ol{grid-template-columns:repeat(auto-fill,150px);gap:36px 24px;margin:0;padding:0 24px 0 0;list-style:none;display:grid}:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)) .z-goal-lane ol{padding:0 0 0 24px}.z-goal-node{width:100%;color:inherit;font:inherit;text-align:start;cursor:pointer;background:0 0;border:0;justify-items:start;gap:14px;padding:0;display:grid}.z-goal-node-text{gap:6px;display:grid}.z-goal-node-text strong{font-family:var(--z-font-display), Georgia, serif;font-size:18px;font-weight:500;line-height:1.25}.z-goal-node-text small{color:#6d6455;font-size:13px}.z-goal-node:hover .z-goal-node-text strong,.z-goal-node[aria-pressed=true] .z-goal-node-text strong{text-underline-offset:4px;text-decoration:underline;text-decoration-thickness:1px}:is(.z-goal-node:focus-visible,.z-goal-milestone:focus-visible,.z-goal-probe:focus-visible){outline:2px solid var(--z-desk-hand-ink);outline-offset:4px;border-radius:6px}.z-goal-step-mark{z-index:1;box-sizing:border-box;border:1.8px solid var(--z-desk-hand-ink);background:var(--z-desk-paper);border-radius:50%;flex:none;width:18px;height:18px;display:inline-block;position:relative}.z-goal-step-mark.solved{background:var(--z-desk-hand-ink)}.z-goal-step-mark.helped{background:radial-gradient(circle, var(--z-desk-hand-ink) 0 3.4px, var(--z-desk-paper) 3.8px)}.z-goal-step-mark.in_progress{background:linear-gradient(90deg, var(--z-desk-hand-ink) 50%, var(--z-desk-paper) 50%)}:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)) .z-goal-step-mark.in_progress{background:linear-gradient(-90deg, var(--z-desk-hand-ink) 50%, var(--z-desk-paper) 50%)}.z-goal-step-mark.known{border-style:dashed}.z-goal-step-mark.outside{background:0 0;border:1.5px dotted #8a8170}.z-goal-step-mark.next{border-color:var(--z-desk-gold);box-shadow:0 0 0 5px var(--z-desk-gold-wash)}.z-goal-step-mark.selected:after{border:1.5px solid var(--z-desk-hand-ink);content:"";border-radius:50%;position:absolute;inset:-7px}.z-goal-milestone-col{gap:14px;display:grid;position:relative}.z-goal-milestone{border:1px solid var(--z-desk-paper-edge);background:var(--z-desk-paper-2);color:inherit;font:inherit;text-align:start;cursor:pointer;border-radius:10px;justify-items:start;gap:8px;padding:24px;display:grid}.z-goal-milestone:hover,.z-goal-milestone.selected{border-color:#8a7f6c}.z-goal-milestone:disabled{cursor:default}.z-goal-diamond{border:1.6px solid var(--z-desk-hand-ink);width:20px;height:20px;margin:6px 6px 14px;transform:rotate(45deg)}.z-goal-milestone.reached .z-goal-diamond{border-color:var(--z-desk-sage-ink);background:var(--z-desk-verified)}.z-goal-milestone-eyebrow{color:#5f584d}.z-goal-milestone strong{font-family:var(--z-font-display), Georgia, serif;font-size:26px;font-weight:500;line-height:1.15}.z-goal-milestone-go{color:#5f584d;margin-top:6px;font-size:13px}.z-goal-probe{color:inherit;font:inherit;text-align:start;cursor:pointer;background:0 0;border:1px dashed #17150f2e;border-radius:10px;align-items:center;gap:14px;padding:10px 12px;display:flex}.z-goal-probe span:last-child{gap:2px;display:grid}.z-goal-probe small{color:#6d6455;font-size:12px}.z-goal-probe strong{font-size:14px;font-weight:600}.z-goal-legend{color:#5f584d;flex-wrap:wrap;gap:8px 24px;margin:0;padding:20px 32px 26px;font-size:13px;list-style:none;display:flex}.z-goal-legend li{align-items:center;gap:8px;display:inline-flex}.z-goal-legend .z-goal-step-mark{border-width:1.5px;width:13px;height:13px}.z-goal-legend .z-goal-step-mark.helped{background:radial-gradient(circle, var(--z-desk-hand-ink) 0 2.2px, var(--z-desk-paper) 2.6px)}.z-goal-sheet{border-top:1px solid var(--z-desk-paper-edge);background:var(--z-desk-paper-2);padding:26px 32px 30px}.z-goal-detail{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:20px 48px;display:grid}.z-goal-detail .z-goal-eyebrow{color:#5f584d}.z-goal-detail h3{color:var(--z-desk-ink-text);font-family:var(--z-font-display), Georgia, serif;margin:10px 0;font-size:clamp(24px,3vw,32px);font-weight:500;line-height:1.15}.z-goal-detail-info p{color:#5f584d;margin:0 0 16px;font-size:15px;line-height:1.6}.z-goal-ink-link{-webkit-appearance:none;appearance:none;border:0;border-bottom:1.5px solid var(--z-desk-ink-text);color:var(--z-desk-ink-text);font:inherit;cursor:pointer;background:0 0;padding:2px 0;font-size:14px;text-decoration:none}.z-goal-ink-link:disabled{cursor:wait;opacity:.55}.z-goal-problems{align-content:start;margin:0;padding:0;list-style:none;display:grid}.z-goal-problems li+li{border-top:1px solid #17150f1f}.z-goal-problems button{width:100%;color:inherit;font:inherit;text-align:start;cursor:pointer;background:0 0;border:0;grid-template-columns:18px minmax(0,1fr) auto;align-items:center;gap:16px;padding:14px 4px;display:grid}.z-goal-problem-text{gap:3px;display:grid}.z-goal-problem-text>span{font-size:16px}.z-goal-problem-text small{color:#6d6455;font-size:13px}.z-goal-problems button:hover .z-goal-problem-text>span{text-underline-offset:4px;text-decoration:underline}.z-goal-arrow{display:inline-block}:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)) .z-goal-arrow{transform:scaleX(-1)}.z-goal-mark{box-sizing:border-box;border:1.6px solid var(--z-desk-hand-ink);background:var(--z-desk-paper-2);border-radius:50%;width:16px;height:16px}.z-goal-mark.in_progress{background:linear-gradient(90deg, var(--z-desk-hand-ink) 50%, var(--z-desk-paper-2) 50%)}:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)) .z-goal-mark.in_progress{background:linear-gradient(-90deg, var(--z-desk-hand-ink) 50%, var(--z-desk-paper-2) 50%)}.z-goal-mark.solved{background:var(--z-desk-hand-ink)}.z-goal-mark.solved_with_help,.z-goal-mark.answer_shown{background:radial-gradient(circle, var(--z-desk-hand-ink) 0 3px, var(--z-desk-paper-2) 3.4px)}.z-goal-beyond{border-bottom:1px solid var(--z-desk-border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px 32px;padding:28px 0;display:flex}.z-goal-beyond h2{font-family:var(--z-font-display), Georgia, serif;margin:0;font-size:24px;font-weight:500}.z-goal-beyond p{color:var(--z-desk-muted);margin:4px 0 0;font-size:14px}.z-goal-beyond ul{flex-wrap:wrap;gap:8px 24px;margin:0;padding:0;list-style:none;display:flex}.z-goal-beyond button{color:var(--z-desk-muted);font:inherit;cursor:pointer;background:0 0;border:0;align-items:center;gap:8px;padding:2px 0;font-size:15px;display:inline-flex}.z-goal-beyond button:hover,.z-goal-beyond button[aria-pressed=true]{color:var(--z-desk-text)}.z-goal-beyond .z-goal-step-mark{border-color:var(--z-desk-muted);width:15px;height:15px}.z-goal-foot{gap:18px;padding-top:22px;display:grid}.z-goal-note summary{color:var(--z-desk-text);cursor:pointer;font-size:15px}.z-goal-note p{max-width:70ch;color:var(--z-desk-muted);font-family:var(--z-font-display), Georgia, serif;margin:12px 0 0;font-size:16px;line-height:1.6}.z-goal-note small{color:var(--z-desk-faint);margin-top:8px;font-size:12px;display:block}.z-goal-foot-actions{color:var(--z-desk-faint);flex-wrap:wrap;align-items:baseline;gap:6px 20px;font-size:13px;display:flex}.z-goal-foot-actions .z-goal-text-link{color:var(--z-desk-muted);font-size:13px}@container (width<=760px){.z-goal-map-head{padding:22px 20px 0}.z-goal-map-body{grid-template-columns:minmax(0,1fr);padding:22px 20px 8px}.z-goal-lane ol{grid-template-columns:minmax(0,1fr);gap:22px;padding:0}:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)) .z-goal-lane ol{padding:0}.z-goal-node{grid-template-columns:18px minmax(0,1fr);align-items:start;gap:16px}.z-goal-node .z-goal-step-mark{margin-top:2px}.z-goal-legend{padding:18px 20px 22px}.z-goal-sheet{padding:22px 20px 24px}.z-goal-detail{grid-template-columns:minmax(0,1fr)}}@media (max-width:760px){.z-goal-hero{grid-template-columns:minmax(0,1fr)}.z-goal-next-card{grid-template-columns:minmax(0,1fr);padding:20px}.z-goal-next-actions{justify-items:start}}.z-goal-intake-card{background:var(--z-desk-paper);width:min(640px,100%);color:var(--z-desk-ink-text);box-shadow:var(--z-desk-shadow);border:1px solid #ffffff1f;border-radius:16px;margin:24px auto 0;padding:28px}.z-goal-intake-card h1{font-family:var(--z-font-display), Georgia, serif;margin:14px 0 0;font-size:26px;font-weight:500}.z-goal-intake-card>p{color:#5f584d;margin:8px 0 0;font-size:14px;line-height:1.55}.z-goal-intake{gap:16px;margin-top:20px;display:grid}.z-goal-question{border:0;gap:6px;min-width:0;margin:0;padding:0;display:grid}.z-goal-question>span,.z-goal-question>legend{margin-bottom:6px;padding:0;font-size:13px;font-weight:600}.z-goal-question input{min-width:0;min-height:42px;color:var(--z-desk-ink-text);font:inherit;background:#fff9;border:1px solid #17150f29;border-radius:9px;padding:0 12px;font-size:14px}.z-goal-question input:focus{outline:2px solid var(--z-desk-gold-border);outline-offset:1px}.z-goal-chips{flex-wrap:wrap;gap:8px;display:flex}.z-goal-chip{min-height:34px;color:var(--z-desk-ink-text);font:inherit;cursor:pointer;background:#ffffff73;border:1px solid #17150f29;border-radius:999px;padding:0 12px;font-size:13px}.z-goal-chip:hover{border-color:var(--z-desk-gold-border)}.z-goal-chip.active{border-color:var(--z-desk-ink-text);background:var(--z-desk-ink-text);color:var(--z-desk-paper)}.z-goal-intake-foot{justify-content:space-between;align-items:center;gap:12px;display:flex}.z-goal-building{color:#5f584d;align-items:center;gap:10px;margin:16px 0 0;font-size:13px;display:flex}.z-goal-building span{border:2px solid var(--z-desk-gold-border);border-top-color:var(--z-desk-gold-deep);border-radius:50%;flex:none;width:14px;height:14px;animation:.9s linear infinite z-goal-spin}@keyframes z-goal-spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.z-goal-building span{animation:none}}.z-goal-match{gap:8px;margin-top:18px;display:grid}.z-goal-match>p{color:#5f584d;margin:0;font-size:13px}.z-goal-choice{background:#ffffff73;border:1px solid #17150f1a;border-radius:10px;justify-content:space-between;align-items:center;gap:14px;padding:12px 14px;display:flex}.z-goal-choice strong{margin-top:3px;font-size:14px;font-weight:600;line-height:1.4;display:block}.z-goal-eyebrow{color:#786f60;letter-spacing:.06em;text-transform:uppercase;font-size:11px;font-weight:600;display:block}:lang(ar) .z-goal-eyebrow{letter-spacing:0}.z-goal-quiet{color:#786f60;margin:0;font-size:12px;line-height:1.5}.z-goal-quiet-note{color:var(--z-desk-muted);font-size:13px}.z-goal-link{-webkit-appearance:none;appearance:none;color:var(--z-desk-gold-deep);font:inherit;cursor:pointer;background:0 0;border:0;padding:2px 0;font-size:13px;font-weight:600;text-decoration:none}:is(.z-goal-link:hover,.z-goal-link:focus-visible){text-underline-offset:3px;text-decoration:underline}.z-goal-link:disabled{cursor:wait;opacity:.55}.z-goal-btn{-webkit-appearance:none;appearance:none;min-height:38px;color:var(--z-desk-ink-text);font:inherit;cursor:pointer;background:#ffffff8c;border:1px solid #17150f2e;border-radius:9px;justify-content:center;align-items:center;padding:0 14px;font-size:13px;font-weight:600;text-decoration:none;display:inline-flex}.z-goal-btn.primary{background:var(--z-desk-gold);color:var(--z-desk-gold-on);border-color:#0000}.z-goal-btn.large{gap:10px;min-height:48px;padding:0 24px;font-size:15px}.z-goal-btn.primary:hover{background:var(--z-desk-gold-hover)}.z-goal-btn:disabled{cursor:not-allowed;opacity:.55}.z-goal-error{color:var(--z-desk-rust);margin:12px 0 0;font-size:13px}@media (max-width:760px){.z-practice-problem-titlebar{flex-direction:column;align-items:stretch}.z-practice-titlebar-side{flex:none;align-items:stretch;width:100%}.z-goal-glance{max-width:none}.z-goal-choice{flex-direction:column;align-items:stretch}}.z-sources{gap:18px;width:min(1480px,100%);margin:0 auto;display:grid}.z-sources-add{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.z-sources-tile{-webkit-appearance:none;appearance:none;border:1px solid var(--z-desk-border);background:var(--z-desk-charcoal);min-width:0;color:var(--z-desk-text);font:inherit;text-align:start;cursor:pointer;border-radius:10px;align-items:flex-start;gap:12px;padding:14px 16px;transition:border-color .15s,background .15s;display:flex}:is(.z-sources-tile:hover,.z-sources-tile:focus-visible){border-color:var(--z-desk-border-strong)}.z-sources-tile:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:2px}.z-sources-tile>svg{width:18px;height:18px;color:var(--z-desk-muted);flex:none;margin-top:2px}.z-sources-tile>span{gap:3px;min-width:0;display:grid}.z-sources-tile strong{font-size:14.5px;font-weight:650}.z-sources-tile small{color:var(--z-desk-muted);font-size:12.5px;line-height:1.4}.z-sources-tile.primary{border-color:var(--z-desk-gold);background:var(--z-desk-gold);color:var(--z-desk-gold-on)}:is(.z-sources-tile.primary:hover,.z-sources-tile.primary:focus-visible){background:var(--z-desk-gold-hover)}.z-sources-tile.primary>svg,.z-sources-tile.primary small{color:var(--z-desk-gold-on)}@supports (color:color-mix(in lab, red, red)){.z-sources-tile.primary>svg,.z-sources-tile.primary small{color:color-mix(in srgb, var(--z-desk-gold-on) 78%, transparent)}}.z-sources-welcome{text-align:center;justify-items:center;gap:14px;padding:clamp(32px,8vh,88px) 0 24px;display:grid}.z-sources-welcome h2{font-family:var(--z-font-display), Georgia, serif;letter-spacing:-.02em;margin:0;font-size:clamp(1.8rem,3.2vw,2.4rem);font-weight:500}[dir=rtl] .z-sources-welcome h2{letter-spacing:0;font-family:inherit;font-weight:650}.z-sources-welcome>p{max-width:46ch;color:var(--z-desk-muted);margin:0 0 10px;font-size:15px;line-height:1.55}.z-sources-add.empty{width:min(880px,100%)}.z-sources-add.empty .z-sources-tile{flex-direction:column;gap:14px;min-height:150px;padding:20px}.z-sources-add.empty .z-sources-tile>svg{width:22px;height:22px}.z-sources-shelf-link{color:var(--z-desk-muted);text-decoration:underline;-webkit-text-decoration-color:var(--z-desk-border-strong);-webkit-text-decoration-color:var(--z-desk-border-strong);-webkit-text-decoration-color:var(--z-desk-border-strong);text-decoration-color:var(--z-desk-border-strong);text-underline-offset:3px;margin-top:6px;font-size:13.5px}.z-sources-shelf-link:hover{color:var(--z-desk-text)}.z-sources-error{color:var(--z-desk-rust);margin:0;font-size:13px}.z-sources-error button{color:var(--z-desk-gold-soft);font:inherit;cursor:pointer;background:0 0;border:0;text-decoration:underline}.z-sources-shelf.z-subject-grid{scroll-snap-type:x proximity;scrollbar-width:thin;scrollbar-color:var(--z-desk-border-strong) transparent;gap:8px;margin-bottom:0;padding-bottom:6px;display:flex;overflow-x:auto}.z-sources-shelf>*{scroll-snap-align:start;flex:0 0 calc(25% - 6px);min-width:0;display:grid}.z-sources-cover-wrap{position:relative}.z-sources-card{width:100%;height:100%}.z-sources-card .z-subject-card-top strong{-webkit-line-clamp:2;overflow-wrap:anywhere;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.z-sources-add-card{-webkit-appearance:none;appearance:none;border:1px dashed var(--z-desk-border-strong);width:100%;height:100%;min-height:132px;color:var(--z-desk-muted);font:inherit;text-align:center;cursor:pointer;background:0 0;border-radius:10px;place-content:center;justify-items:center;gap:6px;padding:16px;transition:border-color .15s,color .15s;display:grid}.z-sources-add-card svg{width:18px;height:18px}.z-sources-add-card strong{color:var(--z-desk-text);font-size:13.5px;font-weight:600}.z-sources-add-card small{max-width:26ch;color:var(--z-desk-faint);font-size:11.5px;line-height:1.35}:is(.z-sources-add-card:hover,.z-sources-add-card:focus-visible){border-color:var(--z-desk-gold-border);color:var(--z-desk-gold-soft)}.z-sources-add-card:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:3px}.z-sources-page{aspect-ratio:3/4;background:var(--z-desk-paper);box-shadow:0 0 0 1px var(--z-desk-paper-edge), 0 8px 12px -6px var(--z-desk-night);border-radius:3px;display:block;position:relative;overflow:hidden}.z-sources-page img{object-fit:cover;object-position:top;width:100%;height:100%;display:block}.z-sources-page-title{color:var(--z-desk-ink-text);font-family:var(--z-font-display), Georgia, serif;overflow-wrap:break-word;-webkit-hyphens:auto;hyphens:auto;-webkit-line-clamp:3;-webkit-box-orient:vertical;margin:10px 10px 7px;font-size:10.5px;font-weight:600;line-height:1.25;display:-webkit-box;overflow:hidden}.z-sources-page-lines{background:repeating-linear-gradient(180deg, var(--z-desk-paper-edge) 0 2px, transparent 2px 9px);height:52%;margin-inline:10px;display:block;-webkit-mask-image:linear-gradient(#000 70%,#0000);mask-image:linear-gradient(#000 70%,#0000)}.z-sources-cards{aspect-ratio:3/4;display:block;position:relative}.z-sources-cards i{border:1px solid var(--z-desk-paper-edge);background:linear-gradient(var(--z-desk-rust) 0 0) 0 14px / 100% 1px no-repeat, repeating-linear-gradient(180deg, transparent 0 11px, #7096be47 11px 12px) 0 22px / 100% calc(100% - 22px) no-repeat, var(--z-desk-paper);box-shadow:0 6px 10px -6px var(--z-desk-night);border-radius:3px;position:absolute;inset:18% 8% 14%}.z-sources-cards i:first-child{background-color:var(--z-desk-paper-2);transform:rotate(-7deg)translate(-4px,6px)}.z-sources-cards i:nth-child(2){transform:rotate(4deg)translate(4px,2px)}.z-sources-cards i:nth-child(3){transform:rotate(-1deg)}.z-sources-cover-skeleton{background:#eee4ce0d;border-radius:8px;min-height:150px;display:block}.z-sources-cover-more{background:var(--z-desk-night);top:12px;border:0;border-radius:6px;place-items:center;width:26px;height:26px;display:grid;position:absolute;inset-inline-end:12px}@supports (color:color-mix(in lab, red, red)){.z-sources-cover-more{background:color-mix(in srgb, var(--z-desk-night) 72%, transparent)}}.z-sources-cover-more{color:var(--z-desk-text);cursor:pointer;opacity:0;font-size:15px;line-height:1;transition:opacity .12s}.z-sources-cover-wrap:hover .z-sources-cover-more,.z-sources-cover-more[aria-expanded=true]{opacity:1}.z-sources-cover-more:focus-visible{opacity:1}.z-sources-cover-menu{top:42px;width:180px;inset-inline:auto 8px}.z-sources-add-wrap{flex:none;position:relative}.z-sources-add-button{gap:6px;min-height:32px}.z-sources-add-button svg{width:14px;height:14px}.z-sources-add-menu{top:calc(100% + 6px);width:210px;inset-inline-end:0}.z-sources-add-menu svg{width:16px;height:16px}.z-sources-rail-actions{border-bottom:1px solid #ffffff14;justify-items:start;gap:8px;margin-bottom:4px;padding:0 10px 14px;display:grid}.z-sources-rail-button{border:1px solid var(--z-desk-gold-border);min-height:32px;color:var(--z-desk-gold-soft);border-radius:8px;align-items:center;gap:7px;padding:0 12px;font-size:12.5px;font-weight:600;text-decoration:none;display:inline-flex}.z-sources-rail-button svg{width:14px;height:14px}:is(.z-sources-rail-button:hover,.z-sources-rail-button:focus-visible){background:var(--z-desk-gold-wash)}.z-sources-rail-link{color:var(--z-desk-muted);text-decoration:underline;-webkit-text-decoration-color:var(--z-desk-border-strong);-webkit-text-decoration-color:var(--z-desk-border-strong);-webkit-text-decoration-color:var(--z-desk-border-strong);text-decoration-color:var(--z-desk-border-strong);text-underline-offset:3px;font-size:12px}.z-sources-rail-link:hover{color:var(--z-desk-text)}.z-sources-folio .z-practice-contents-title{overflow-wrap:anywhere}.z-sources-dot.verified{background:var(--z-desk-verified)}.z-sources-dot.revisit{background:var(--z-desk-rust)}.z-sources-dot.in_progress{background:var(--z-desk-paper-edge)}.z-sources-page .z-practice-problem-row{color:inherit;text-decoration:none}.z-sources-row-name{-webkit-line-clamp:2;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.z-sources-drop{z-index:60;border:2px dashed var(--z-desk-gold);background:var(--z-desk-night);border-radius:14px;place-items:center;display:grid;position:fixed;inset:12px}@supports (color:color-mix(in lab, red, red)){.z-sources-drop{background:color-mix(in srgb, var(--z-desk-night) 70%, transparent)}}.z-sources-drop{color:var(--z-desk-gold-soft);font-family:var(--z-font-display), Georgia, serif;pointer-events:none;font-size:1.4rem}.z-sources-paywall{z-index:80;background:var(--z-desk-night);position:fixed;inset:0;overflow:auto}@media (max-width:1200px){.z-sources-shelf>*{flex-basis:calc(50% - 4px)}}@media (max-width:860px){.z-sources-add{grid-template-columns:1fr}.z-sources-add.empty .z-sources-tile{flex-direction:row;min-height:0;padding:16px}.z-sources-shelf>*{flex-basis:min(78%,300px)}.z-sources-cover-more{opacity:1}}@media (max-width:760px){.z-sources-folio.z-practice-folio,.z-exams-folio.z-practice-folio{min-height:0}}.z-exams-cover:disabled{cursor:default}.z-exams-cover.soon .z-subject-card-cover{opacity:.6;filter:saturate(.7)}.z-exams-volume{position:relative}.z-exams-volume:after{content:attr(data-volume);border:1px solid var(--z-desk-gold-soft);inset-inline-end:8px;min-width:26px;padding:1px 6px 2px;position:absolute;bottom:8px}@supports (color:color-mix(in lab, red, red)){.z-exams-volume:after{border:1px solid color-mix(in srgb, var(--z-desk-gold-soft) 55%, transparent)}}.z-exams-volume:after{background:var(--z-desk-night);border-radius:3px}@supports (color:color-mix(in lab, red, red)){.z-exams-volume:after{background:color-mix(in srgb, var(--z-desk-night) 78%, transparent)}}.z-exams-volume:after{color:var(--z-desk-gold-soft);font-family:var(--z-font-display), Georgia, serif;text-align:center;font-size:15px;line-height:1.2}.z-exams-header{justify-content:space-between}.z-exams-header-text{align-content:center;gap:2px;min-width:0;min-height:38px;display:grid}.z-exams-header-text strong{font-family:var(--z-font-display), Georgia, serif;font-size:1.05rem;font-weight:500}[dir=rtl] .z-exams-header-text strong{font-family:inherit;font-weight:650}.z-exams-header-text small{color:#665f54;font-size:12.5px}.z-exams-coming{padding:8px 24px 24px}.z-exams-rail-paper .z-exams-booklet{width:22px;height:28px;box-shadow:none;border-inline-start-width:3px;font-size:13px}.z-exams-rail-paper .z-practice-chapter-main em{white-space:nowrap}.z-exams-rail-paper.live .z-practice-chapter-main em{color:var(--z-desk-gold-soft)}.z-exams-paper-head{justify-content:flex-start;gap:14px;padding:6px 0 12px}.z-exams-paper-head>div:nth-child(2){flex:auto;min-width:0}.z-exams-sittings{margin:4px 0 0;padding:0;list-style:none;display:grid}.z-exams-sittings li+li{border-top:1px solid #17150f14}.z-exams-sittings a{color:var(--z-desk-ink-text);grid-template-columns:96px minmax(0,1fr) auto;align-items:center;gap:14px;padding:12px 4px;text-decoration:none;display:grid}.z-exams-sittings a:hover{background:#17150f08}.z-exams-sitting-date{color:#665f54;font-variant-numeric:tabular-nums;font-size:12.5px}.z-exams-sitting-score{font-family:var(--z-font-display), Georgia, serif;flex-wrap:wrap;align-items:baseline;gap:4px 12px;font-size:15.5px;display:flex}[dir=rtl] .z-exams-sitting-score{font-family:inherit;font-weight:600}.z-exams-sitting-score small{color:#665f54;font-family:var(--z-font-sans,inherit);font-size:12px}.z-exams-no-sittings{color:#665f54;text-align:start;margin:8px 0 0;padding:8px 4px;font-size:13px}.z-exams-gold-button{-webkit-appearance:none;appearance:none;background:var(--z-desk-gold);min-height:34px;color:var(--z-desk-gold-on);font:inherit;white-space:nowrap;cursor:pointer;border:0;border-radius:8px;justify-content:center;align-items:center;padding:0 14px;font-size:13.5px;font-style:normal;font-weight:650;text-decoration:none;display:inline-flex}:is(.z-exams-gold-button:hover,.z-exams-gold-button:focus-visible){background:var(--z-desk-gold-hover)}.z-exams-gold-button:disabled{opacity:.6;cursor:wait}.z-exams-quiet-button{-webkit-appearance:none;appearance:none;min-height:30px;color:var(--z-desk-ink-text);font:inherit;white-space:nowrap;cursor:pointer;background:0 0;border:1px solid #17150f38;border-radius:7px;align-items:center;padding:0 11px;font-size:12.5px;font-weight:600;text-decoration:none;display:inline-flex}:is(.z-exams-quiet-button:hover,.z-exams-quiet-button:focus-visible){background:#17150f0d}.z-exams-quiet-button:disabled{opacity:.45;cursor:default}.z-exams-pro{border:1px solid var(--z-desk-gold-border);color:var(--z-desk-gold-deep);border-radius:999px;padding:3px 9px;font-size:11.5px;font-weight:650;text-decoration:none}.z-exams-blueprint{gap:3px;margin:10px 0 18px;display:flex}.z-exams-blueprint-segment{flex-basis:0;gap:4px;min-width:0;display:grid}.z-exams-blueprint-segment i{background:var(--z-exams-chapter);border-radius:2px;height:8px;display:block}.z-exams-blueprint-segment span{text-overflow:ellipsis;font-size:12px;font-weight:600;line-height:1.25;overflow:hidden}.z-exams-blueprint-segment small{color:#665f54;font-size:11px}.z-exams-booklet{border:1px solid var(--z-desk-paper-edge);border-inline-start:4px solid var(--z-subject-calculus-cloth);background:var(--z-desk-paper-2);border-radius:2px 4px 4px 2px;flex:none;place-items:center;width:34px;height:42px;display:grid}@supports (color:color-mix(in lab, red, red)){.z-exams-booklet{background:color-mix(in srgb, var(--z-desk-paper-2) 70%, white)}}.z-exams-booklet{color:var(--z-desk-ink-text);font-family:var(--z-font-display), Georgia, serif;font-size:18px;font-weight:500;box-shadow:0 2px 4px #17150f14}.z-exams-in-progress{border:1px solid #17150f1a;border-inline-start:3px solid var(--z-desk-gold);color:inherit;background:#ffffff80;border-radius:10px;align-items:center;gap:14px;margin:8px 0 14px;padding:14px 16px 14px 14px;text-decoration:none;display:flex}.z-exams-in-progress:hover{background:#ffffffb8}.z-exams-in-progress>span{flex:1;gap:3px;min-width:0;display:grid}.z-exams-in-progress strong{font-family:var(--z-font-display), Georgia, serif;font-size:16px;font-weight:500}[dir=rtl] .z-exams-in-progress strong{font-family:inherit;font-weight:650}.z-exams-in-progress small{color:#665f54;font-size:12px}.z-practice-mock-link{color:var(--z-desk-gold-deep);margin:4px 0 8px;font-size:12.5px;font-weight:600;text-decoration:none;display:block}.z-practice-mock-link:hover{text-underline-offset:3px;text-decoration:underline}.z-exam-start-shell{background:radial-gradient(850px 420px at 72% -8%, #c69a3812, transparent 62%), var(--z-desk-ink);min-height:100dvh;color:var(--z-desk-text);padding:28px clamp(16px,4vw,48px) 64px}.z-exam-back{color:var(--z-desk-muted);align-items:center;gap:6px;margin-bottom:18px;font-size:13.5px;font-weight:600;text-decoration:none;display:inline-flex}.z-exam-back svg{width:14px;height:14px;transform:scaleX(-1)}[dir=rtl] .z-exam-back svg{transform:none}.z-exam-back:hover{color:var(--z-desk-text)}.z-exam-start{background:var(--z-desk-paper);width:min(720px,100%);color:var(--z-desk-ink-text);box-shadow:var(--z-desk-shadow);border:1px solid #ffffff1f;border-radius:12px;justify-items:start;gap:12px;margin:0 auto;padding:clamp(24px,4vw,40px);display:grid}.z-exam-start-skeleton{opacity:.4;min-height:360px}.z-exam-start-course{color:#665f54;font-family:var(--z-font-display), Georgia, serif;font-variant:small-caps;letter-spacing:.04em;margin:0;font-size:13px}[dir=rtl] .z-exam-start-course{font-variant:normal;letter-spacing:0;font-family:inherit}.z-exam-start h1{font-family:var(--z-font-display), Georgia, serif;letter-spacing:-.02em;margin:0;font-size:clamp(1.9rem,3.4vw,2.5rem);font-weight:500;line-height:1.15}[dir=rtl] .z-exam-start h1{letter-spacing:0;font-family:inherit;font-weight:650}.z-exam-start-facts{color:#4f493f;flex-wrap:wrap;gap:6px 18px;margin:0;font-size:14px;font-weight:600;display:flex}.z-exam-start-facts div+div:before{content:"·";color:#a39a8b;margin-inline-end:18px}.z-exam-start-facts dt{display:inline}.z-exam-start-rules{width:100%;font-family:var(--z-font-display), Georgia, serif;padding:0;border-block:1px solid #17150f1a;margin:6px 0 0;padding-block:10px;font-size:16px;line-height:1.7;list-style:none}[dir=rtl] .z-exam-start-rules{font-family:inherit}.z-exam-start-new{margin:0;font-size:14px}.z-exam-start-screen{color:#665f54;margin:0;font-size:12.5px;display:none}.z-exam-start-button{min-height:42px;margin-top:6px;padding:0 22px;font-size:15px}@media (max-width:760px){.z-exam-start-screen{display:block}}.z-exam-start-page{background:var(--z-desk-paper);width:min(1100px,100%);color:var(--z-desk-ink-text);box-shadow:var(--z-desk-shadow);border:1px solid #ffffff1f;border-radius:14px;margin:0 auto;overflow:hidden}.z-exam-start-page.z-exam-start-skeleton{opacity:.4;min-height:480px}.z-exam-start-hero{background:linear-gradient(#fff6,#0000);border-bottom:1px solid #17150f1a;grid-template-columns:132px minmax(0,1fr) auto;align-items:center;gap:28px;padding:clamp(24px,3.4vw,36px);display:grid}.z-exam-start-cover{width:132px;display:block}.z-exam-start-head{justify-items:start;gap:10px;min-width:0;display:grid}.z-exam-start-head h1{font-family:var(--z-font-display), Georgia, serif;letter-spacing:-.02em;margin:0;font-size:clamp(2.2rem,4vw,3rem);font-weight:500;line-height:1.05}[dir=rtl] .z-exam-start-head h1{letter-spacing:0;font-family:inherit;font-weight:650}.z-exam-start-head .z-exam-start-rules{color:#4f493f;border:0;flex-wrap:wrap;gap:4px 18px;margin:2px 0 0;padding:0;font-family:inherit;font-size:13.5px;line-height:1.5;display:flex}.z-exam-start-head .z-exam-start-rules li{align-items:center;gap:7px;display:inline-flex}.z-exam-start-head .z-exam-start-rules li:before{content:"";background:var(--z-desk-gold-deep);border-radius:50%;width:5px;height:5px}.z-exam-start-action{justify-items:center;gap:8px;min-width:200px;display:grid}.z-exam-start-action .z-exam-start-button{width:100%;min-height:46px;margin:0;font-size:15.5px}.z-exam-start-action>small{color:#8a8174;font-size:12px}.z-exam-start-body{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:clamp(24px,4vw,48px);padding:clamp(24px,3.4vw,36px);display:grid}.z-exam-start-body section{align-content:start;gap:14px;min-width:0;display:grid}.z-exam-start-body h2{color:#665f54;font-family:var(--z-font-display), Georgia, serif;margin:0;font-size:15px;font-style:italic;font-weight:400}[dir=rtl] .z-exam-start-body h2{font-family:inherit;font-style:normal;font-weight:650}.z-exam-start-body .z-exam-start-new{color:#665f54;font-size:13.5px}.z-exam-start-steps{counter-reset:exam-step;gap:16px;margin:0;padding:0;list-style:none;display:grid}.z-exam-start-steps li{counter-increment:exam-step;grid-template-columns:30px minmax(0,1fr);gap:2px 12px;display:grid}.z-exam-start-steps li:before{content:counter(exam-step);border:1.5px solid var(--z-desk-gold);width:28px;height:28px;color:var(--z-desk-gold-deep);border-radius:50%;grid-row:span 2;place-items:center;font-size:13px;font-weight:700;display:grid}.z-exam-start-steps strong{font-family:var(--z-font-display), Georgia, serif;font-size:16px;font-weight:500}[dir=rtl] .z-exam-start-steps strong{font-family:inherit;font-weight:650}.z-exam-start-steps span{color:#5f584d;font-size:13.5px;line-height:1.5}@media (max-width:860px){.z-exam-start-hero{grid-template-columns:96px minmax(0,1fr)}.z-exam-start-cover{width:96px}.z-exam-start-action{grid-column:1/-1;justify-items:stretch}.z-exam-start-action>small,.z-exam-start-action .z-exam-start-screen{text-align:center}.z-exam-start-body{grid-template-columns:minmax(0,1fr)}}.z-exams-blueprint-legend{gap:14px;display:grid}.z-exams-blueprint-bar{gap:3px;height:10px;display:flex}.z-exams-blueprint-bar i{border-radius:2px}.z-exams-blueprint-legend ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 20px;margin:0;padding:0;list-style:none;display:grid}.z-exams-blueprint-legend li{grid-template-columns:10px minmax(0,1fr) auto;align-items:center;gap:8px;font-size:13.5px;display:grid}.z-exams-blueprint-legend li i{border-radius:2px;width:10px;height:10px}.z-exams-blueprint-legend li span{font-weight:600}.z-exams-blueprint-legend li small{color:#665f54;font-variant-numeric:tabular-nums;font-size:12px}@media (max-width:560px){.z-exams-blueprint-legend ul{grid-template-columns:minmax(0,1fr)}}.z-exam-start-table{background:#ffffff47;border-top:1px solid #17150f1a;gap:12px;padding:clamp(20px,3.4vw,32px) clamp(24px,3.4vw,36px) clamp(24px,3.4vw,36px);display:grid}.z-exam-start-table header{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.z-exam-start-table h2{color:#665f54;font-family:var(--z-font-display), Georgia, serif;margin:0;font-size:15px;font-style:italic;font-weight:400}[dir=rtl] .z-exam-start-table h2{font-family:inherit;font-style:normal;font-weight:650}.z-exam-start-table small{color:#8a8174;font-size:12px}.z-exam-start-table table{border-collapse:collapse;width:100%;box-shadow:0 0 0 1px var(--z-desk-paper-edge);table-layout:fixed;font-variant-numeric:tabular-nums;border-radius:6px;overflow:hidden}.z-exam-start-table th,.z-exam-start-table td{border:1px solid var(--z-desk-paper-edge);height:38px;padding:0 8px}@supports (color:color-mix(in lab, red, red)){.z-exam-start-table th,.z-exam-start-table td{border:1px solid color-mix(in srgb, var(--z-desk-paper-edge) 80%, transparent)}}.z-exam-start-table th,.z-exam-start-table td{text-align:center;font-size:14px}.z-exam-start-table th[scope=row]{color:#665f54;text-align:start;width:110px;font-size:12.5px;font-weight:650}.z-exam-start-table thead{background:var(--z-desk-paper-2)}@supports (color:color-mix(in lab, red, red)){.z-exam-start-table thead{background:color-mix(in srgb, var(--z-desk-paper-2) 70%, transparent)}}.z-exam-start-table thead th[scope=col],.z-exam-start-table td.total{font-weight:650}.z-exam-start-table tr.score td,.z-exam-start-table tr.score th{height:52px}@media (max-width:560px){.z-exam-start-table th[scope=row]{width:72px;font-size:11.5px}.z-exam-start-table th,.z-exam-start-table td{padding:0 2px;font-size:12.5px}}.z-exam-paywall{justify-items:start;gap:10px;margin-top:6px;display:grid}.z-exam-paywall p{margin:0;font-weight:600}.z-exam-booklet-header{border-bottom:1px solid var(--z-desk-border);gap:10px;width:100%;padding:10px 2px 12px;display:grid}.z-pdf-sticky-card .z-exam-booklet-header{grid-area:1/1/auto/-1}.z-exam-submit,.z-exam-flag{white-space:nowrap}.z-exam-sitting .z-pdf-sticky-card header .z-exam-booklet-header button{border-radius:8px;width:auto;min-width:0;height:auto}.z-exam-sitting .z-pdf-sticky-card header .z-exam-booklet-header button.z-exam-submit{border:1px solid var(--z-desk-border-strong);min-height:32px;color:var(--z-desk-text);background:0 0;padding:0 12px}.z-exam-sitting .z-pdf-sticky-card header .z-exam-booklet-header button.z-exam-flag{color:var(--z-desk-muted);background:0 0;border:0;padding:0}.z-exam-sitting .z-pdf-sticky-card header .z-exam-booklet-header button.z-exam-flag.on{color:var(--z-desk-gold-soft)}.z-exam-sitting .z-pdf-sticky-card header .z-exam-strip button{border:1.5px solid var(--z-desk-border-strong);width:28px;min-width:28px;height:28px;color:var(--z-desk-muted);background:0 0;border-radius:50%;padding:0}.z-exam-sitting .z-pdf-sticky-card header .z-exam-strip button.written{border-color:var(--z-desk-paper);background:var(--z-desk-paper);color:var(--z-desk-ink-text)}.z-exam-sitting .z-pdf-sticky-card header .z-exam-strip button.flagged{border-color:var(--z-desk-gold);box-shadow:0 0 0 1px var(--z-desk-gold)}.z-exam-booklet-top,.z-exam-booklet-row{flex-wrap:wrap;align-items:center;gap:10px 16px;display:flex}.z-exam-booklet-title{min-width:0;color:var(--z-desk-text);font-family:var(--z-font-display), Georgia, serif;font-variant:small-caps;letter-spacing:.05em;flex:1;font-size:15px}[dir=rtl] .z-exam-booklet-title{font-variant:normal;letter-spacing:0;font-family:inherit;font-weight:650}.z-exam-clock{color:var(--z-desk-muted);font-variant-numeric:tabular-nums;letter-spacing:.02em;font-size:15px;font-weight:600}.z-exam-clock.late{color:var(--z-desk-gold-soft)}.z-exam-submit{-webkit-appearance:none;appearance:none;border:1px solid var(--z-desk-border-strong);min-height:32px;color:var(--z-desk-text);font:inherit;cursor:pointer;background:0 0;border-radius:8px;padding:0 12px;font-size:13px;font-weight:600}:is(.z-exam-submit:hover,.z-exam-submit:focus-visible){background:#eee4ce0f}.z-exam-booklet-problem{color:var(--z-desk-text);font-size:13.5px;font-weight:650}.z-exam-strip{flex-wrap:wrap;gap:6px;display:flex}.z-exam-strip button{border:1.5px solid var(--z-desk-border-strong);width:28px;height:28px;color:var(--z-desk-muted);font:inherit;font-variant-numeric:tabular-nums;cursor:pointer;background:0 0;border-radius:50%;place-items:center;font-size:12px;font-weight:650;display:grid}.z-exam-strip button.written{border-color:var(--z-desk-paper);background:var(--z-desk-paper);color:var(--z-desk-ink-text)}.z-exam-strip button.flagged{border-color:var(--z-desk-gold);box-shadow:0 0 0 1px var(--z-desk-gold)}.z-exam-strip button.current{outline:2px solid var(--z-desk-gold-soft);outline-offset:2px}.z-exam-flag{-webkit-appearance:none;appearance:none;color:var(--z-desk-muted);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;margin-inline-start:auto;font-size:12.5px;text-decoration:underline}.z-exam-flag.on{color:var(--z-desk-gold-soft)}.z-exam-nav{justify-content:space-between;gap:10px;padding:12px 0 24px;display:flex}.z-exam-nav .z-exams-quiet-button{border-color:var(--z-desk-border-strong);color:var(--z-desk-text)}.z-exam-nav .z-exam-nav-next{min-width:132px;min-height:40px;font-size:14.5px}.z-exam-loading{padding:12px 0}.z-exam-confirm p{margin:0 0 6px;font-size:15px;line-height:1.5}.z-exam-results{gap:14px;width:min(860px,100%)}.z-exam-score{font-size:clamp(2.3rem,5vw,3.2rem)!important}.z-exam-marks{font-family:var(--z-font-display), Georgia, serif;margin:-6px 0 0;font-size:1.3rem}[dir=rtl] .z-exam-marks{font-family:inherit}.z-exam-timeup{border-inline-start:3px solid var(--z-desk-gold);background:#c69a381a;margin:0;padding:8px 12px;font-weight:600}.z-exam-rings{flex-wrap:wrap;gap:10px;margin:4px 0;display:flex}.z-exam-ring{width:30px;height:30px;color:var(--z-desk-ink-text);border:1.5px solid #17150f47;border-radius:50%;place-items:center;font-size:14px;font-weight:700;display:grid;position:relative}.z-exam-ring small{color:#8a8174;font-size:10.5px;font-weight:500;position:absolute;bottom:-16px}.z-exam-ring.pending{border-style:dashed;animation:2.4s linear infinite z-exam-ring-wait}.z-exam-ring:not(.pending){animation:.42s cubic-bezier(.3,1.4,.5,1) both z-exam-ring-in;animation-delay:var(--z-ring-delay,0s)}@keyframes z-exam-ring-wait{to{transform:rotate(360deg)}}.z-exam-ring.pending small{animation:2.4s linear infinite reverse z-exam-ring-wait}@keyframes z-exam-ring-in{0%{opacity:0;transform:scale(.6)}to{opacity:1;transform:scale(1)}}.z-exam-marking{justify-items:start;gap:10px;display:grid}.z-exam-marking h1{font-family:var(--z-font-display), Georgia, serif;margin:0;font-size:clamp(1.9rem,3.4vw,2.4rem);font-weight:500}[dir=rtl] .z-exam-marking h1{font-family:inherit;font-weight:650}.z-exam-marking-progress{font-variant-numeric:tabular-nums;align-items:center;gap:10px;margin:0;font-size:15px;font-weight:650;display:inline-flex}.z-exam-marking-pen{background:var(--z-desk-gold);transform-origin:0;border-radius:2px;width:22px;height:2px;animation:1.1s ease-in-out infinite alternate z-exam-pen}[dir=rtl] .z-exam-marking-pen{transform-origin:100%}@keyframes z-exam-pen{0%{transform:scaleX(.2)}to{transform:scaleX(1)}}.z-exam-marking-steps{color:#a39a8b;flex-wrap:wrap;gap:6px 18px;margin:0;padding:0;font-size:13.5px;list-style:none;display:flex}.z-exam-marking-steps li{transition:color .4s}.z-exam-marking-steps li.current{color:var(--z-desk-ink-text)}.z-exam-marking-steps li+li:before{content:"→";color:#c9bfae;margin-inline-end:18px}[dir=rtl] .z-exam-marking-steps li+li:before{content:"←"}.z-exam-outcome{justify-items:start;gap:8px;display:grid}.z-exam-verdict{letter-spacing:.02em;border-radius:999px;padding:4px 12px;font-size:13px;font-weight:700;animation:.5s ease-out .75s both z-exam-verdict-in}.z-exam-verdict.pass{background:var(--z-desk-verified-wash);color:var(--z-desk-sage-ink);box-shadow:inset 0 0 0 1px var(--z-desk-sage-ink)}@supports (color:color-mix(in lab, red, red)){.z-exam-verdict.pass{box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--z-desk-sage-ink) 35%, transparent)}}.z-exam-verdict.not-yet{color:var(--z-desk-rust-ink);background:#b768481a;box-shadow:inset 0 0 0 1px #9a4a2e4d}.z-exam-summary{max-width:60ch;margin:0;font-size:15.5px;line-height:1.5;animation:.5s ease-out .95s both z-exam-verdict-in}.z-exam-outcome-meta{margin:0;font-size:12.5px}@keyframes z-exam-verdict-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){.z-exam-ring,.z-exam-ring small,.z-exam-marking-pen,.z-exam-verdict,.z-exam-summary{animation:none!important}}.z-exam-ring.correct{border-color:var(--z-desk-sage-ink);background:var(--z-desk-verified-wash);color:var(--z-desk-sage-ink)}.z-exam-ring.not_yet{border-color:var(--z-desk-rust-ink);color:var(--z-desk-rust-ink)}.z-exam-ring.check{border-color:var(--z-desk-gold);color:var(--z-desk-gold-deep)}.z-exam-result-list{width:100%;box-shadow:none;border-color:#17150f1a;margin-top:18px;padding:4px 18px}.z-exam-result-row{border-bottom:1px solid #17150f14;grid-template-columns:30px minmax(0,1fr);gap:14px;padding:16px 0;display:grid}.z-exam-result-row:last-child{border-bottom:0}.z-exam-result-row>.z-exam-ring{margin-top:2px}.z-exam-result-body{justify-items:start;gap:8px;min-width:0;display:grid}.z-exam-result-head{flex-wrap:wrap;align-items:baseline;gap:6px 12px;display:flex}.z-exam-result-head strong{font-family:var(--z-font-display), Georgia, serif;font-size:15.5px;font-weight:500}[dir=rtl] .z-exam-result-head strong{font-family:inherit;font-weight:650}.z-exam-result-head small{color:#665f54;font-size:12px}.z-exam-result-label{color:#665f54;font-size:12.5px;font-style:normal;font-weight:650}.z-exam-result-label.correct{color:var(--z-desk-sage-ink)}.z-exam-result-label.not_yet{color:var(--z-desk-rust-ink)}.z-exam-result-label.check{color:var(--z-desk-gold-deep)}.z-exam-result-body .z-practice-row-math{color:#5f584d;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:13.5px;line-height:1.55;display:-webkit-box;overflow:hidden}.z-exam-reading{background:#ffffff73;border:1px solid #17150f14;border-radius:8px;gap:6px;width:100%;padding:10px 12px;display:grid}.z-exam-reading>small{color:#665f54;font-size:12px}.z-exam-reading ol{gap:6px;margin:0;padding-inline-start:22px;display:grid}.z-exam-reading li{flex-wrap:wrap;align-items:center;gap:8px 12px;display:flex}.z-exam-fix{align-items:center;gap:6px;display:inline-flex}.z-exam-fix input{min-width:220px;font-family:var(--z-font-mono), ui-monospace, monospace;background:#fff;border:1px solid #17150f40;border-radius:6px;padding:5px 8px;font-size:13px}.z-exam-fix-cancel{color:#665f54;cursor:pointer;background:0 0;border:0;font-size:18px}.z-exam-earliest{border-inline-start:2px solid var(--z-desk-rust);background:#b768480f;gap:4px;width:100%;padding:8px 12px;display:grid}.z-exam-earliest>small{color:var(--z-desk-rust-ink);font-size:12px;font-weight:650}.z-exam-feedback{color:#4f493f;font-size:13.5px;line-height:1.55}.z-exam-line-marks{gap:4px;width:100%;margin:0;padding:0;font-size:13px;list-style:none;display:grid}.z-exam-line-marks li{border-bottom:1px dotted #17150f1f;justify-content:space-between;gap:12px;padding:3px 0;display:flex}.z-exam-line-marks li span{font-variant-numeric:tabular-nums;flex:none;font-weight:650}.z-exam-revisit{width:100%;margin-top:10px}.z-exam-revisit h2{font-family:var(--z-font-display), Georgia, serif;margin:0 0 8px;font-size:1.1rem;font-weight:500}[dir=rtl] .z-exam-revisit h2{font-family:inherit;font-weight:650}.z-exam-revisit div{flex-wrap:wrap;gap:8px;display:flex}.z-exam-revisit a{color:var(--z-desk-ink-text);border:1px solid #17150f29;border-radius:999px;padding:5px 11px;font-size:13px;font-weight:600;text-decoration:none}.z-exam-revisit a:hover{background:#17150f0d}@media (max-width:760px){.z-practice-problem-titlebar.z-exams-paper-head{flex-flow:wrap;align-items:center}.z-exams-paper-head .z-practice-titlebar-side{flex-basis:100%}.z-exams-sittings a{grid-template-columns:72px minmax(0,1fr) auto}.z-exams-blueprint{flex-wrap:wrap}.z-exams-blueprint-segment{flex-basis:calc(50% - 3px)!important}.z-exam-flag{margin-inline-start:0}}.z-exam-dispute{color:#665f54;font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:0;font-size:12px;text-decoration:underline}.z-exam-disputed{color:#665f54;font-size:12px}.z-exam-dispute-line{color:#665f54;cursor:pointer;background:0 0;border:1px solid #17150f33;border-radius:50%;flex:none;width:20px;height:20px;margin-inline-start:6px;font-size:11px}button{font:inherit;cursor:pointer}svg{flex:none}@media (max-width:980px){.z-site-header{flex-direction:column;align-items:flex-start;padding-block:16px}.z-site-header nav{width:100%;overflow-x:auto}.z-auth-shell{grid-template-columns:1fr;min-height:auto}.z-pricing-grid,.z-contact-sales-grid{grid-template-columns:1fr}.z-contact-sales-head{display:grid}.z-pricing-card{min-height:0}.z-chat-app{padding:0}.z-chat-frame{grid-template-columns:58px minmax(0,1fr);height:100%;min-height:0}}@media (max-width:680px){.z-chat-frame{border-radius:0;grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr;min-height:0}.z-chat-thread{padding:24px 16px}.z-chat-composer-wrap{padding:12px 16px}}:is(html:has(.z-chat-app),body:has(.z-chat-app)){overscroll-behavior:none;height:100%;overflow:hidden}.z-chat-app,.z-chat-frame,.z-chat-main,.z-chat-v2-page,.z-chat-v2,.z-chat-thread,.z-chat-composer-wrap{color:var(--z-console-text);background:var(--z-console-bg)!important}.z-chat-frame,.z-console-sidebar{background:var(--z-console-black)!important}.z-console-sidebar{border-inline-end-color:var(--z-console-border)}.z-console-muted,.z-chat-kicker{color:var(--z-console-muted)}.z-chat-icon-button,.z-chat-composer-upload,.z-chat-v2-cancel{border-color:var(--z-console-border);color:var(--z-console-muted);background:0 0}.z-chat-icon-button:hover{border-color:var(--z-console-border-strong);color:var(--z-console-text);background:var(--z-console-hover)!important;box-shadow:none!important}.z-chat-composer,.z-chat-composer.z-chat-v2-composer,.z-account-menu,.z-response-widget,.z-chat-message.user .z-chat-bubble,.z-chat-v2-body-status,.z-response-widget>header,.z-response-widget-grid>div,.z-markdown-response code,.z-markdown-response pre,.z-markdown-table-wrap{border-color:var(--z-console-border);color:var(--z-console-text);box-shadow:none;background:var(--z-console-panel)!important}.z-account-menu button,.z-account-menu a{text-align:start;background:0 0;border:0;border-radius:14px;align-items:center;gap:10px;min-height:42px;padding:0 10px;font-size:14px;font-weight:760;text-decoration:none;display:flex;color:var(--z-console-text)!important}.z-account-menu button:hover,.z-account-menu a:hover{background:var(--z-console-hover)!important;color:var(--z-console-text)!important}.z-account-menu button.danger{color:var(--z-console-muted)!important}.z-account-menu button svg,.z-account-menu a svg{color:currentColor;flex:none;width:18px;height:18px}.z-chat-composer,.z-chat-composer.z-chat-v2-composer{background:var(--z-console-input)!important}.z-chat-v2-body-status{color:var(--z-console-muted);box-shadow:none!important;background:0 0!important;border-color:#0000!important}.z-chat-v2.dragging{outline-offset:-10px;outline:1px solid #f2f0ec47}.z-chat-composer:focus-within,.z-chat-composer.z-chat-v2-composer:focus-within,.z-chat-composer.z-chat-v2-composer.dragging{border-color:#f2f0ec9e!important;box-shadow:0 0 0 4px #f2f0ec1a!important}.z-chat-v2-input,.z-chat-composer textarea,.z-chat-composer input,.z-chat-composer [contenteditable=true]{background:var(--z-console-input)!important;color:var(--z-console-text)!important}.z-chat-v2-input::placeholder,.z-chat-composer textarea::placeholder,.z-chat-composer input::placeholder{color:var(--z-console-faint)!important}.z-chat-frame .z-button-primary,.z-chat-v2-send:not(:disabled){border-color:var(--z-console-accent-border)!important;background:var(--z-console-accent)!important;color:var(--z-console-accent-on)!important;box-shadow:none!important}.z-chat-frame .z-button-primary:hover,.z-chat-v2-send:not(:disabled):hover{border-color:var(--z-console-accent-hover-border)!important;background:var(--z-console-accent-hover)!important;color:var(--z-console-accent-on)!important}.z-chat-v2-send:disabled{background:var(--z-console-panel-raised)!important;color:var(--z-console-faint)!important}.z-chat-frame .z-settings-toggle{color:#665f54!important}.z-chat-frame .z-settings-toggle:not(:has(input:disabled)){color:var(--z-desk-ink-text)!important}.z-chat-frame .z-settings-toggle:not(:has(input:disabled)) span{color:var(--z-desk-ink-text)!important}.z-chat-frame .z-settings-toggle input{border-color:var(--z-console-muted);accent-color:var(--z-console-accent)}.z-chat-frame .z-settings-toggle input:disabled{opacity:.58}.z-markdown-response a{color:var(--z-console-accent)!important}.z-chat-frame .z-chat-message.assistant .z-chat-bubble,.z-chat-frame .z-chat-message.assistant .z-chat-bubble p,.z-chat-frame .z-chat-message.assistant .z-chat-bubble li,.z-chat-frame .z-chat-message.assistant .z-chat-bubble h1,.z-chat-frame .z-chat-message.assistant .z-chat-bubble h2,.z-chat-frame .z-chat-message.assistant .z-chat-bubble h3,.z-chat-frame .z-chat-message.assistant .z-chat-bubble h4,.z-chat-frame .z-chat-message.assistant .z-chat-bubble strong,.z-chat-frame .z-chat-message.assistant .z-chat-bubble em,.z-chat-frame .z-markdown-response,.z-chat-frame .z-markdown-response p,.z-chat-frame .z-markdown-response li,.z-chat-frame .z-markdown-response h1,.z-chat-frame .z-markdown-response h2,.z-chat-frame .z-markdown-response h3,.z-chat-frame .z-markdown-response h4,.z-chat-frame .z-markdown-response strong,.z-chat-frame .z-markdown-response em,.z-chat-frame .z-markdown-response span{color:var(--z-console-text)!important}.z-chat-frame .z-markdown-response blockquote,.z-chat-frame .z-markdown-response small,.z-chat-frame .z-markdown-response figcaption{color:var(--z-console-muted)!important}.z-chat-frame .z-markdown-response code,.z-chat-frame .z-markdown-response pre,.z-chat-frame .z-markdown-table-wrap{border-color:var(--z-console-border);background:var(--z-console-panel-raised)!important;color:var(--z-console-text)!important}.z-chat-frame .z-chat-message.user .z-markdown-response,.z-chat-frame .z-chat-message.user .z-markdown-response p,.z-chat-frame .z-chat-message.user .z-markdown-response li,.z-chat-frame .z-chat-message.user .z-markdown-response h1,.z-chat-frame .z-chat-message.user .z-markdown-response h2,.z-chat-frame .z-chat-message.user .z-markdown-response h3,.z-chat-frame .z-chat-message.user .z-markdown-response h4,.z-chat-frame .z-chat-message.user .z-markdown-response strong,.z-chat-frame .z-chat-message.user .z-markdown-response em,.z-chat-frame .z-chat-message.user .z-markdown-response span{color:#ffffffe6!important}.z-chat-frame .z-chat-message.user .z-markdown-response blockquote,.z-chat-frame .z-chat-message.user .z-markdown-response small,.z-chat-frame .z-chat-message.user .z-markdown-response figcaption{color:#ffffffb8!important}.z-chat-frame .z-chat-message.user .z-markdown-response a{color:#fffffff5!important}.z-chat-frame .z-chat-message.user .z-markdown-response code,.z-chat-frame .z-chat-message.user .z-markdown-response pre,.z-chat-frame .z-chat-message.user .z-markdown-table-wrap{color:#ffffffeb!important;background:#ffffff14!important;border-color:#ffffff2e!important}.z-chat-frame .z-chat-message.assistant .z-chat-bubble,.z-chat-frame .z-chat-message.assistant.pending .z-chat-bubble{box-shadow:none!important;background:0 0!important;border:0!important;border-radius:0!important;padding:0 5px!important}.z-chat-frame .z-chat-message.assistant.pending .z-chat-v2-status{margin-bottom:10px}.z-chat-main.document-reader-active,.z-chat-main.document-reader-active .z-document-reader-main{background:var(--z-console-bg)!important}.z-chat-frame .z-pdf-toolbar{border-bottom-color:var(--z-console-border);background:var(--z-console-bg);gap:14px;min-height:54px;padding:0 16px}.z-chat-frame .z-zoom-group,.z-document-reader .z-zoom-group,.z-chat-main.document-reader-active .z-zoom-group{background:0 0;border:0;align-items:center;gap:2px;padding:0;display:inline-flex}.z-chat-frame .z-zoom-group button,.z-document-reader .z-zoom-group button,.z-chat-main.document-reader-active .z-zoom-group button{width:28px;height:28px;color:var(--z-desk-ink-text);background:0 0;border:0;border-radius:7px;justify-content:center;align-items:center;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.z-chat-frame .z-zoom-group button,.z-document-reader .z-zoom-group button,.z-chat-main.document-reader-active .z-zoom-group button{color:color-mix(in srgb, var(--z-desk-ink-text) 62%, transparent)}}.z-chat-frame .z-zoom-group button,.z-document-reader .z-zoom-group button,.z-chat-main.document-reader-active .z-zoom-group button{padding:0;font-size:14px;font-weight:500;line-height:1}.z-chat-frame .z-zoom-group button:hover,.z-document-reader .z-zoom-group button:hover,.z-chat-main.document-reader-active .z-zoom-group button:hover{color:var(--z-desk-ink-text);background:#17150f0f}.z-chat-frame .z-zoom-val,.z-document-reader .z-zoom-val,.z-chat-main.document-reader-active .z-zoom-val{min-width:42px;color:var(--z-desk-ink-text)}@supports (color:color-mix(in lab, red, red)){.z-chat-frame .z-zoom-val,.z-document-reader .z-zoom-val,.z-chat-main.document-reader-active .z-zoom-val{color:color-mix(in srgb, var(--z-desk-ink-text) 62%, transparent)}}.z-chat-frame .z-zoom-val,.z-document-reader .z-zoom-val,.z-chat-main.document-reader-active .z-zoom-val{font:600 11px/1 var(--z-font-mono), ui-monospace, monospace;text-align:center}.z-chat-frame .z-pdf-stage{border-color:var(--z-console-border);background:var(--z-console-bg);border-radius:0}.z-console-sidebar{background:var(--z-desk-ink)!important}@supports (color:color-mix(in lab, red, red)){.z-console-sidebar{background:color-mix(in srgb, var(--z-desk-ink) 86%, black)!important}}.z-console-sidebar{border-inline-end-color:var(--z-console-border);padding:18px 14px 14px}.z-console-sidebar svg{stroke-width:1.7px;flex:0 0 20px;width:20px;height:20px}.z-console-muted{color:var(--z-console-faint);letter-spacing:0;font-size:11px;font-weight:450}.z-console-sidebar.collapsed,.z-chat-frame.resizing-console .z-console-sidebar.collapsed{padding-inline:9px}.z-console-see-more{border:1px solid var(--z-console-border);background:var(--z-console-panel-raised);width:fit-content;min-height:32px;color:var(--z-console-text);border-radius:999px;margin:8px 0 0;padding:0 12px;font-size:13px;font-weight:500}.z-study-companion-tabs{border:1px solid var(--z-console-focus-border,var(--z-console-border));background:var(--z-console-focus-panel-raised,var(--z-console-panel-raised));border-radius:10px;align-items:center;gap:4px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.z-study-companion-tabs{background:color-mix(in srgb, var(--z-console-focus-panel-raised,var(--z-console-panel-raised)) 82%, transparent)}}.z-study-companion-tabs{padding:3px}.z-study-companion-tabs button{cursor:pointer;min-height:28px;font:720 10px/1 var(--z-font-mono), ui-monospace, monospace;padding:0 9px;color:var(--z-console-focus-muted,var(--z-console-muted))!important;background:0 0!important;border:0!important;border-radius:7px!important}.z-study-companion-tabs button.active{background:var(--z-console-accent-soft)!important;color:var(--z-console-focus-text,var(--z-console-text))!important}.z-document-companion-tabs{flex:none;align-self:flex-start;margin:10px 12px 0}.z-visualization-companion{min-height:0;color:var(--z-console-focus-text,var(--z-console-text));flex-direction:column;flex:auto;gap:12px;padding:12px;display:flex;overflow:auto}.z-visualization-disclaimer{border-inline-start:2px solid var(--z-console-accent);color:var(--z-console-focus-muted,var(--z-console-muted));margin:0;padding-inline-start:9px;font-size:11px;line-height:1.45}.z-visualization-loading,.z-visualization-empty{min-height:150px;color:var(--z-console-focus-muted,var(--z-console-muted));text-align:center;align-content:center;place-items:center;gap:12px;display:grid}.z-visualization-loading>span{border:2px solid var(--z-console-focus-border,var(--z-console-border));border-block-start-color:var(--z-console-accent);border-radius:50%;width:22px;height:22px;animation:.8s linear infinite z-visualization-spin}.z-visualization-loading p,.z-visualization-empty p{margin:0;font-size:12px}.z-visualization-confirmation{border:1px solid var(--z-console-focus-border,var(--z-console-border));background:var(--z-console-focus-panel-raised,var(--z-console-panel-raised));border-radius:14px;gap:12px;padding:14px;display:grid}.z-visualization-confirmation>p,.z-visualization-confirmation>small{color:var(--z-console-focus-muted,var(--z-console-muted));margin:0;font-size:11px}.z-visualization-equation{background:var(--z-console-focus-paper,#f8f4e9);color:var(--z-console-focus-ink,#272521);text-align:center;border-radius:9px;padding:15px 12px;overflow-x:auto}.z-visualization-actions{flex-wrap:wrap;gap:8px;display:flex}.z-visualization-actions button,.z-visualization-empty button{border:1px solid var(--z-console-focus-border,var(--z-console-border));min-height:34px;color:var(--z-console-focus-text,var(--z-console-text));cursor:pointer;background:0 0;border-radius:9px;padding:0 11px;font-size:11px;font-weight:720}.z-visualization-actions button.primary{border-color:var(--z-console-accent-border);background:var(--z-console-accent);color:var(--z-console-accent-on)}.z-visualization-figure{gap:8px;min-height:0;margin:0;display:grid}.z-visualization-figure figcaption{color:var(--z-console-focus-muted,var(--z-console-muted));font-size:10px;line-height:1.45}.z-practice-tutor.z-study-companion{width:min(420px,100% - 28px)}.z-practice-tutor.z-study-companion>header>span,.z-practice-tutor.z-study-companion>header>span>.z-study-companion-tabs{min-width:0}.z-practice-tutor.z-study-companion>header .z-study-companion-tabs button{width:auto;height:28px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay){--z-companion-width:420px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded{width:var(--z-companion-width)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay):has(.z-document-assistant-dock.expanded) .z-pdf-sticky-card.composer.focus{width:calc(100% - var(--z-companion-width) - 28px);margin-inline-start:0;margin-inline-end:calc(var(--z-companion-width) + 28px)}[dir=rtl] .z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay):has(.z-document-assistant-dock.expanded) .z-pdf-sticky-card.composer.focus{width:calc(100% - var(--z-companion-width) - 28px);margin-inline-start:0;margin-inline-end:calc(var(--z-companion-width) + 28px)}@keyframes z-visualization-spin{to{transform:rotate(360deg)}}@media (max-width:1099px){.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay){--z-companion-width:360px}.z-practice-tutor.z-study-companion{width:min(360px,100% - 28px)}}@media (max-width:980px){.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay):has(.z-document-assistant-dock.expanded) .z-pdf-sticky-card.composer.focus{width:100%;margin-inline:0}[dir=rtl] .z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay):has(.z-document-assistant-dock.expanded) .z-pdf-sticky-card.composer.focus{width:100%;margin-inline:0}}@media (max-width:760px){.z-document-assistant-dock.expanded,.z-practice-tutor.z-study-companion{width:auto;max-height:55dvh;inset-block:auto 8px;inset-inline:8px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded{width:auto;max-height:55dvh;inset-block:auto 8px;inset-inline:8px}}@media (prefers-reduced-motion:reduce){.z-visualization-loading>span{animation:none}}.z-visualization-shell{flex-direction:column;flex:1;min-height:0;display:flex;overflow:hidden}.z-svg-animation iframe{aspect-ratio:16/11;border:1px solid var(--z-console-focus-border);border-radius:var(--z-console-radius-sm,6px);background:var(--z-console-focus-panel-raised);flex-shrink:0;width:100%;display:block}.z-svg-animation .z-visualization-actions{flex-wrap:wrap;margin-block:10px}.z-svg-animation figcaption p{margin:6px 0}.z-pdf-sticky-tick.double{color:var(--z-console-sage)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick.double,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick.single{color:var(--z-desk-sage-ink)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick.single{color:color-mix(in srgb, var(--z-desk-sage-ink) 72%, var(--z-console-focus-muted))}}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick.warning{color:var(--z-desk-gold-deep)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick.invalid{color:var(--z-desk-rust-ink)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick.double,.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick.single{background:var(--z-desk-verified-wash)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-tick.invalid{background:var(--z-desk-rust-wash)}.z-pdf-sticky-review-squiggle{color:var(--z-desk-rust)}.z-pdf-sticky-review-marker.verified,.z-pdf-sticky-review-passive-marker.verified,.z-pdf-sticky-review-marker.tutor-correct,.z-pdf-sticky-review-passive-marker.tutor-correct,.z-pdf-sticky-review-marker.accepted,.z-pdf-sticky-review-passive-marker.accepted{color:var(--z-desk-sage-ink)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-review-marker.tutor-correct,.z-pdf-sticky-review-passive-marker.tutor-correct,.z-pdf-sticky-review-marker.accepted,.z-pdf-sticky-review-passive-marker.accepted{color:color-mix(in srgb, var(--z-desk-sage-ink) 72%, var(--z-console-focus-muted))}}.z-pdf-sticky-review-marker.invalid{color:var(--z-desk-rust-ink)}.z-pdf-sticky-review-marker.unclear{color:var(--z-desk-gold-deep)}.z-pdf-sticky-review-error{border-color:var(--z-desk-rust)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-review-error{border-color:color-mix(in srgb, var(--z-desk-rust) 36%, var(--z-console-focus-border))}}.z-pdf-sticky-review-error{background:var(--z-console-focus-panel-raised)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-review-error{background:color-mix(in srgb, var(--z-console-focus-panel-raised) 94%, var(--z-desk-rust) 6%)}}.z-pdf-sticky-review-error{color:var(--z-desk-rust-ink)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad:before{background:linear-gradient(90deg, transparent 55px, var(--z-desk-rust) 55px, var(--z-desk-rust) 56px, transparent 56px), linear-gradient(var(--z-desk-grid) 1px, transparent 1px), linear-gradient(90deg, var(--z-desk-grid) 1px, transparent 1px)}@supports (color:color-mix(in lab, red, red)){:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad:before{background:linear-gradient(90deg, transparent 55px, color-mix(in srgb, var(--z-desk-rust) 22%, transparent) 55px, color-mix(in srgb, var(--z-desk-rust) 22%, transparent) 56px, transparent 56px), linear-gradient(var(--z-desk-grid) 1px, transparent 1px), linear-gradient(90deg, var(--z-desk-grid) 1px, transparent 1px)}}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad:before{background-size:100% 100%,32px 32px,32px 32px}[dir=rtl] :is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad:before{background:linear-gradient(270deg, transparent 55px, var(--z-desk-rust) 55px, var(--z-desk-rust) 56px, transparent 56px), linear-gradient(var(--z-desk-grid) 1px, transparent 1px), linear-gradient(90deg, var(--z-desk-grid) 1px, transparent 1px)}@supports (color:color-mix(in lab, red, red)){[dir=rtl] :is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad:before{background:linear-gradient(270deg, transparent 55px, color-mix(in srgb, var(--z-desk-rust) 22%, transparent) 55px, color-mix(in srgb, var(--z-desk-rust) 22%, transparent) 56px, transparent 56px), linear-gradient(var(--z-desk-grid) 1px, transparent 1px), linear-gradient(90deg, var(--z-desk-grid) 1px, transparent 1px)}}[dir=rtl] :is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad:before{background-size:100% 100%,32px 32px,32px 32px}.z-practice-problem-context{font:600 12px/1.2 var(--z-font-sans);letter-spacing:0;text-transform:none}.z-practice-tutor{--z-console-focus-panel:var(--z-desk-panel);--z-console-focus-panel-raised:var(--z-desk-charcoal);--z-console-focus-border:var(--z-desk-border);--z-console-focus-border-strong:var(--z-desk-border-strong);--z-console-focus-text:var(--z-desk-text);--z-console-focus-muted:var(--z-desk-muted);--z-console-focus-faint:var(--z-desk-faint);border-color:var(--z-desk-border);background:var(--z-desk-charcoal);color:var(--z-desk-text);box-shadow:var(--z-desk-shadow);border-radius:12px}.z-practice-tutor>header{border-bottom:0;padding:12px 10px 0 18px}[dir=rtl] .z-practice-tutor>header{padding:12px 18px 0 10px}.z-practice-tutor>header>button{width:34px;height:34px;color:var(--z-desk-muted);background:0 0;border:0;font-size:18px}.z-practice-tutor>header>button:hover{color:var(--z-desk-text)}.z-practice-tutor .z-study-companion-tabs,.z-document-assistant-dock .z-study-companion-tabs{background:0 0;border:0;gap:2px;padding:0}.z-practice-tutor .z-study-companion-tabs button,.z-document-assistant-dock .z-study-companion-tabs button{font:600 12px/1 var(--z-font-sans);padding:0 8px;border-radius:0!important}.z-practice-tutor .z-study-companion-tabs button.active,.z-document-assistant-dock .z-study-companion-tabs button.active{box-shadow:inset 0 -1.5px 0 var(--z-desk-gold);background:0 0!important}.z-practice-tutor .z-study-companion-tabs{gap:10px}.z-practice-tutor .z-study-companion-tabs :is(button,span){color:var(--z-desk-faint);font:600 12px/1 var(--z-font-sans);letter-spacing:.12em;text-transform:uppercase;background:0 0;border:0;padding:9px 4px;display:inline-block}.z-practice-tutor .z-study-companion-tabs span.active{box-shadow:inset 0 -1.5px 0 var(--z-desk-gold)}.z-practice-tutor .z-study-companion-tabs .active{color:var(--z-desk-gold)}[dir=rtl] .z-practice-tutor .z-study-companion-tabs :is(button,span){letter-spacing:0;font-size:13px}.z-document-assistant-dock .z-study-companion-tabs span.active{color:var(--z-desk-gold);box-shadow:inset 0 -1.5px 0 var(--z-desk-gold);font:600 12px/1 var(--z-font-sans);letter-spacing:.12em;text-transform:uppercase;padding:8px 4px;display:inline-block}[dir=rtl] .z-document-assistant-dock .z-study-companion-tabs span.active{letter-spacing:0;font-size:13px}.z-practice-tutor-body{border-inline-start:2px solid var(--z-desk-border-strong);font-family:var(--z-font-display), Georgia, serif;margin:12px 22px 18px;padding:0 0 0 16px;font-size:17px;font-weight:400;line-height:1.65}.z-chat-frame .z-practice-tutor-body .z-markdown-response,.z-chat-frame .z-practice-tutor-body .z-markdown-response :is(p,li){font-family:inherit;font-size:inherit;font-weight:380;line-height:inherit}[dir=rtl] .z-chat-frame .z-practice-tutor-body .z-markdown-response :is(p,li){font-weight:400}.z-practice-tutor-body.neutral{border-inline-start-color:var(--z-desk-border-strong)}.z-practice-tutor-body.issue{border-inline-start-color:var(--z-desk-rust)}.z-practice-tutor-body.verified{border-inline-start-color:var(--z-desk-verified)}[dir=rtl] .z-practice-tutor-body{padding:0 16px 0 0;font-family:inherit;font-size:16.5px;line-height:1.8}.z-practice-tutor-progress{font-family:var(--z-font-sans);font-size:13px;font-style:italic}.z-practice-verified{color:var(--z-desk-verified);background:0 0;border:0;border-radius:0;padding:0 0 10px;font-weight:600}.z-practice-tutor-body:has(>.z-practice-verified){border-inline-start-color:var(--z-desk-verified)}.z-practice-actions{align-items:center;gap:10px;padding:0 22px 20px}.z-practice-tutor .z-practice-actions{border-top:0}.z-practice-tutor .z-practice-actions button{border:1px solid var(--z-desk-border-strong);min-height:44px;color:var(--z-desk-text);background:0 0;border-radius:8px;padding-inline:16px;font-size:15px;font-weight:500}.z-practice-tutor .z-practice-actions button.hint{flex:auto}.z-practice-tutor .z-practice-actions button.hint:not(:disabled){border-color:var(--z-desk-border-strong);color:var(--z-desk-text);background:0 0}.z-practice-tutor .z-practice-actions button:not(:disabled):hover{background:var(--z-desk-hover)}.z-practice-tutor .z-practice-actions button.quiet{color:var(--z-console-focus-muted);border-color:#0000;padding-inline:6px}.z-practice-tutor .z-practice-actions button.quiet:not(:disabled):hover{color:var(--z-console-focus-text);text-underline-offset:3px;text-decoration:underline}.z-practice-more{position:relative}.z-practice-tutor .z-practice-actions button.more{border-color:var(--z-desk-border-strong);min-width:52px;color:var(--z-desk-text);padding-inline:8px;font-size:16px;line-height:1}.z-practice-more-menu{z-index:8;border:1px solid var(--z-desk-border-strong);background:var(--z-desk-panel);min-width:190px;box-shadow:var(--z-desk-shadow);border-radius:10px;padding:4px;display:grid;position:absolute;inset-block-end:calc(100% + 6px);inset-inline-start:0}.z-practice-tutor .z-practice-more-menu button{color:var(--z-desk-text);text-align:start;background:0 0;border:0;justify-content:flex-start;font-weight:500}.z-practice-tutor .z-practice-more-menu button:not(:disabled):hover{background:#eee8dc14}.z-practice-tutor .z-practice-more-menu button:disabled{color:var(--z-desk-faint)}.z-practice-tutor .z-practice-actions button.primary{border-color:var(--z-desk-gold);background:var(--z-desk-gold);color:var(--z-desk-gold-on);margin-inline-start:auto}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad,:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-shell.is-terminal .z-pdf-sticky-ink-pad{background:var(--z-desk-paper)}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad :is(canvas.z-pdf-sticky-ink-base,canvas.z-pdf-sticky-ink-immutable-base){mix-blend-mode:multiply}:is(.z-practice-scratch,.z-pdf-sticky-focus-overlay) .z-pdf-sticky-card.composer.focus .z-pdf-sticky-ink-pad canvas.z-pdf-sticky-ink-base{background:0 0}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-review-overlay.invalid{background:var(--z-desk-rust-wash);box-shadow:0 0 0 4px var(--z-desk-rust-wash);mix-blend-mode:multiply;border-radius:4px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-review-overlay.invalid.selected{border-color:var(--z-desk-rust)}@supports (color:color-mix(in lab, red, red)){.z-pdf-sticky-card.composer.focus .z-pdf-sticky-review-overlay.invalid.selected{border-color:color-mix(in srgb, var(--z-desk-rust) 45%, transparent)}}.z-pdf-sticky-card.composer.focus :is(.z-pdf-sticky-review-marker,.z-pdf-sticky-review-passive-marker){box-shadow:none;font-size:11px}.z-pdf-sticky-card.composer.focus :is(.z-pdf-sticky-review-marker,.z-pdf-sticky-review-passive-marker):is(.verified,.tutor-correct,.accepted){background:var(--z-desk-verified-wash);padding:2px 7px;font-size:15px}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-review-marker.invalid{background:var(--z-desk-rust-wash)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-review-marker.unclear{background:var(--z-desk-gold-wash)}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-review-marker.muted{background:0 0}.z-pdf-sticky-card.composer.focus .z-pdf-sticky-review-marker.selected{box-shadow:0 0 0 1px}.z-study-audio{background:var(--z-desk-paper,#f4eddf);align-items:center}@supports (color:color-mix(in lab, red, red)){.z-study-audio{background:color-mix(in srgb, var(--z-desk-paper,#f4eddf) 88%, transparent)}}.z-study-audio{border:1px solid var(--z-desk-border,#c9bda8);color:var(--z-desk-ink,#2a2620);border-radius:999px;flex:none;gap:2px;height:34px;padding:2px 4px;display:inline-flex;position:relative}.z-study-audio button,.z-study-audio summary{color:inherit;cursor:pointer;background:0 0;border:0;justify-content:center;align-items:center;display:flex}.z-study-audio>button{border-radius:50%;width:27px;height:27px;padding:5px}:is(.z-study-audio>button:hover,.z-study-audio>button:focus-visible,.z-study-audio summary:hover){background:var(--z-desk-gold,#a77b25)}@supports (color:color-mix(in lab, red, red)){:is(.z-study-audio>button:hover,.z-study-audio>button:focus-visible,.z-study-audio summary:hover){background:color-mix(in srgb, var(--z-desk-gold,#a77b25) 14%, transparent)}}.z-study-audio svg{width:16px;height:16px}.z-study-audio-main{background:var(--z-desk-gold,#a77b25)!important;color:var(--z-desk-paper,#fffaf0)!important}.z-study-audio-menu{position:relative}.z-study-audio-menu>summary{border-radius:16px;gap:6px;min-width:100px;max-width:154px;padding:3px 7px;list-style:none}.z-study-audio-menu>summary::-webkit-details-marker{display:none}.z-study-audio-eq{color:var(--z-desk-gold,#a77b25);font-size:13px}.z-study-audio-title{text-align:start;min-width:0;line-height:1.05;display:grid}.z-study-audio-title strong,.z-study-audio-title small{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.z-study-audio-title strong{font-size:10px;font-weight:650}.z-study-audio-title small{color:var(--z-desk-ink-muted,#746b5e);margin-top:2px;font-size:8px}.z-study-audio-popover{background:var(--z-desk-paper,#f8f1e5);border:1px solid var(--z-desk-border,#c9bda8);z-index:80;inset-inline-end:0;border-radius:14px;gap:10px;min-width:260px;padding:12px;display:grid;position:absolute;top:calc(100% + 9px);box-shadow:0 14px 34px #2a26202e}.z-study-audio-popover>strong{font-family:var(--z-font-display,serif);font-size:14px}.z-study-audio-tracks{gap:3px;display:grid}.z-study-audio .z-study-audio-menu .z-study-audio-popover .z-study-audio-tracks>button{color:inherit;text-align:start;white-space:normal;background:0 0;border:0;border-radius:8px;place-content:center stretch;place-items:start;gap:2px;width:100%;min-width:0;height:auto;min-height:42px;padding:7px 8px;line-height:1.2;display:grid}:is(.z-study-audio .z-study-audio-menu .z-study-audio-popover .z-study-audio-tracks>button:hover,.z-study-audio .z-study-audio-menu .z-study-audio-popover .z-study-audio-tracks>button:focus-visible){background:var(--z-desk-gold,#a77b25)}@supports (color:color-mix(in lab, red, red)){:is(.z-study-audio .z-study-audio-menu .z-study-audio-popover .z-study-audio-tracks>button:hover,.z-study-audio .z-study-audio-menu .z-study-audio-popover .z-study-audio-tracks>button:focus-visible){background:color-mix(in srgb, var(--z-desk-gold,#a77b25) 9%, transparent)}}.z-study-audio .z-study-audio-menu .z-study-audio-popover .z-study-audio-tracks>button.active{background:var(--z-desk-gold,#a77b25)}@supports (color:color-mix(in lab, red, red)){.z-study-audio .z-study-audio-menu .z-study-audio-popover .z-study-audio-tracks>button.active{background:color-mix(in srgb, var(--z-desk-gold,#a77b25) 16%, transparent)}}.z-study-audio-tracks span{font-size:12px;font-weight:600}.z-study-audio-tracks small{color:var(--z-desk-ink-muted,#746b5e);font-size:10px}.z-study-audio-popover label{grid-template-columns:auto 1fr;align-items:center;gap:5px;font-size:10px;display:grid}.z-study-audio .z-study-audio-menu .z-study-audio-popover label>input[type=range]{accent-color:var(--z-desk-gold,#a77b25);background:0 0;border:0;width:100%;min-width:0;height:16px;padding:0}.z-study-audio-popover a{color:var(--z-desk-ink-muted,#746b5e);text-underline-offset:2px;font-size:10px;text-decoration:underline}@media (max-width:760px){.z-study-audio-menu>summary{min-width:0;padding-inline:6px}.z-study-audio-title{display:none}.z-study-audio-popover{min-width:min(270px,100vw - 24px);inset-inline-end:-62px}}.z-reference-reader{background:var(--z-desk-ink,#17150f);color:var(--z-desk-paper,#f2ecdf);grid-template-rows:auto minmax(0,1fr) auto;height:100dvh;min-height:0;display:grid}.z-reference-reader-header{border-bottom:1px solid var(--z-desk-paper,#f2ecdf);align-items:center}@supports (color:color-mix(in lab, red, red)){.z-reference-reader-header{border-bottom:1px solid color-mix(in srgb, var(--z-desk-paper,#f2ecdf) 15%, transparent)}}.z-reference-reader-header{grid-template-columns:minmax(130px,auto) minmax(0,1fr) auto;gap:20px;padding:12px 18px;display:grid}.z-reference-reader-practice{background:var(--z-desk-gold);border-radius:var(--z-radius-control,8px);color:var(--z-desk-gold-on);white-space:nowrap;align-items:baseline;gap:10px;margin-inline-start:14px;padding:4px 10px;font-size:12px;font-weight:600;text-decoration:none;display:inline-flex}.z-reference-reader-practice:hover{background:var(--z-desk-gold-hover)}.z-reference-reader-practice span{opacity:.8;font-weight:400;display:none}@media (min-width:1100px){.z-reference-reader-practice span{display:inline}}.z-reference-reader-header h1{font-family:var(--z-font-display,serif);margin:2px 0;font-size:clamp(18px,2vw,26px)}.z-reference-reader-header small,.z-reference-reader-header p{color:var(--z-desk-muted,#a69f91);margin:0;font-size:11px}.z-reference-reader-back,.z-reference-reader-page-controls button{border:1px solid var(--z-desk-paper,#f2ecdf);background:0 0}@supports (color:color-mix(in lab, red, red)){.z-reference-reader-back,.z-reference-reader-page-controls button{border:1px solid color-mix(in srgb, var(--z-desk-paper,#f2ecdf) 18%, transparent)}}.z-reference-reader-back,.z-reference-reader-page-controls button{color:inherit;border-radius:8px;min-height:34px;padding:0 10px}.z-reference-reader-back:hover,.z-reference-reader-page-controls button:hover:not(:disabled){border-color:var(--z-desk-gold,#c69a38);color:var(--z-desk-soft-gold,#dec27b)}.z-reference-reader-page-controls{align-items:center;gap:8px;display:flex}.z-reference-reader-page-controls span{color:var(--z-desk-muted,#a69f91);text-align:center;min-width:96px;font-size:11px}.z-reference-reader-page-controls button{min-width:34px;padding:0;font-size:20px}.z-reference-reader-page-controls button:disabled{cursor:default;opacity:.35}.z-reference-reader-desk{background:var(--z-desk-surface,#211e17);text-align:center;min-height:0;padding:22px;overflow:auto}.z-reference-reader-page{text-align:initial;background:#fff;display:inline-block;position:relative;box-shadow:0 18px 48px #00000047}.z-reference-reader-page canvas{display:block}.z-reference-reader-highlights{pointer-events:none;z-index:2;position:absolute;inset:0}.z-reference-reader-highlights span{background:var(--z-desk-highlight-yellow);mix-blend-mode:multiply;border-radius:2px;position:absolute}.z-reference-reader-state{color:var(--z-desk-muted,#a69f91);margin:20vh auto 0}.z-reference-reader-footer{border-top:1px solid var(--z-desk-paper,#f2ecdf);align-items:center}@supports (color:color-mix(in lab, red, red)){.z-reference-reader-footer{border-top:1px solid color-mix(in srgb, var(--z-desk-paper,#f2ecdf) 12%, transparent)}}.z-reference-reader-footer{justify-content:space-between;gap:20px;padding:9px 18px;display:flex}.z-reference-reader-footer p{color:var(--z-desk-muted,#a69f91);margin:0;font-size:10px}.z-reference-reader-footer a{color:var(--z-desk-soft-gold,#dec27b);text-underline-offset:3px;font-size:11px}@media (max-width:720px){.z-reference-reader-header{grid-template-columns:auto minmax(0,1fr);gap:10px;padding:10px}.z-reference-reader-back span{display:none}.z-reference-reader-practice{margin:6px 0 0}.z-reference-reader-practice span{display:none}.z-reference-reader-page-controls{grid-column:1/-1;justify-content:center}.z-reference-reader-controls{grid-column:1/-1}.z-reference-reader-desk{padding:12px}.z-reference-reader-footer{flex-direction:column;align-items:flex-start;gap:4px}}.z-textbook-workspace{min-width:0}.z-textbook-backdrop{z-index:199;background:var(--z-desk-night);position:fixed;inset:0}@supports (color:color-mix(in lab, red, red)){.z-textbook-backdrop{background:color-mix(in srgb, var(--z-desk-night) 8%, transparent)}}.z-textbook-panel{z-index:200;background:var(--z-desk-charcoal);width:calc(54vw - 16px);max-height:calc(100dvh - 80px);color:var(--z-desk-text);border:1px solid var(--z-desk-border-strong);border-radius:var(--z-radius-panel);box-shadow:var(--z-desk-shadow);flex-direction:column;display:flex;position:fixed;inset-block:64px auto;inset-inline:auto 16px}.z-textbook-panel[hidden]{display:none}.z-textbook-toolbar{border-bottom:1px solid var(--z-desk-border);flex-shrink:0;align-items:center;gap:8px;padding:6px 12px;display:flex}.z-textbook-label{text-overflow:ellipsis;white-space:nowrap;min-width:0;font-family:var(--z-font-display);margin-inline-end:auto;font-size:18px;overflow:hidden}.z-textbook-toolbar button{flex-shrink:0}.z-textbook-toolbar button,.z-textbook-status button{color:inherit;border-radius:var(--z-radius-control);font:inherit;cursor:pointer;background:0 0;border:1px solid #0000;min-height:40px;padding:8px 10px;font-size:13px}.z-textbook-toolbar button:hover,.z-textbook-status button:hover{background:var(--z-desk-gold-wash)}.z-textbook-toolbar .z-textbook-close{width:40px;padding:0}.z-textbook-close span{vertical-align:-1px;margin-inline-start:0;font-size:20px}.z-textbook-panel :focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:3px}.z-textbook-status{padding:32px}.z-textbook-panel .z-reference-reader{border-radius:0 0 var(--z-radius-panel) var(--z-radius-panel);background:var(--z-desk-charcoal);height:calc(100dvh - 130px);color:var(--z-desk-text);--z-desk-soft-gold:var(--z-desk-gold-soft);flex:auto;overflow:hidden}.z-reference-reader.is-embedded .z-reference-reader-header{grid-template-columns:minmax(0,1fr);gap:12px}.z-reference-reader-controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.z-reference-reader.is-embedded .z-reference-reader-page-controls{justify-content:center}.z-reference-reader-return{color:var(--z-desk-gold-soft);font:inherit;text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:4px 0;font-size:12px;text-decoration:underline}.z-textbook-panel .z-reference-reader-header{border-color:var(--z-desk-border);padding:6px 12px}.z-textbook-panel .z-reference-reader-page-controls button{border-color:var(--z-desk-border)}.z-textbook-panel .z-reference-reader-desk{background:var(--z-desk-charcoal);overscroll-behavior:contain;padding:8px}.z-textbook-panel .z-reference-reader-page{box-shadow:none}.z-textbook-panel .z-reference-reader-footer{border-color:var(--z-desk-border);padding:5px 12px}.z-textbook-resize{display:none}@media (min-width:1280px){.z-textbook-workspace.has-textbook{margin-inline-end:var(--z-textbook-width)}.z-textbook-backdrop.is-docked{display:none}.z-textbook-panel.is-docked{height:100dvh;max-height:none;width:var(--z-textbook-width);border-radius:0;margin:0;inset:0;inset-inline-start:auto}.z-textbook-panel.is-docked .z-reference-reader{border-radius:0;flex:auto}.z-textbook-resize{cursor:col-resize;touch-action:none;width:10px;display:block;position:absolute;inset-block:0;inset-inline-start:-5px}:is(.z-textbook-resize:hover,.z-textbook-resize:focus-visible){background:var(--z-desk-gold-wash)}}@media (max-width:1279px){.z-textbook-dock{display:none}}@media (max-width:800px){.z-textbook-panel{width:calc(100% - 40px);inset-block:64px auto;inset-inline:auto 20px}}@media (max-width:600px){.z-textbook-panel{width:calc(100% - 24px);max-height:calc(100dvh - 76px);inset-block:64px auto;inset-inline:auto 12px}.z-textbook-toolbar{padding:4px 10px}.z-textbook-panel .z-reference-reader-header{padding:5px 8px}.z-textbook-panel .z-reference-reader-footer{padding-inline:16px;padding-bottom:max(9px, env(safe-area-inset-bottom))}.z-reference-reader-controls{justify-content:space-between;gap:4px}.z-textbook-panel .z-reference-reader-page-controls{gap:3px}.z-textbook-panel .z-reference-reader-page-controls span{min-width:76px}.z-textbook-panel .z-reference-reader-zoom{gap:3px}}.z-reference-reader-zoom{grid-column:1/-1;justify-content:center;gap:8px;display:flex}.z-reference-reader-zoom button{border:1px solid var(--z-desk-border-strong);color:var(--z-desk-text);cursor:pointer;background:0 0;border-radius:6px;min-width:34px;min-height:32px;padding:4px 10px}.z-reference-reader-zoom button:disabled{opacity:.35;cursor:default}.z-reference-reader-page{margin-inline:auto;display:block}.z-textbook-panel .z-reference-reader-return.is-compact{border-radius:var(--z-radius-control);flex-shrink:0;place-items:center;width:32px;min-height:34px;padding:0;display:grid}.z-textbook-panel .z-reference-reader-return.is-compact:hover{background:var(--z-desk-gold-wash)}.z-textbook-panel .z-reference-reader-controls{gap:6px}.z-textbook-panel .z-reference-reader-page-controls{gap:4px}.z-textbook-panel .z-reference-reader-page-controls span{min-width:80px}.z-textbook-panel .z-reference-reader-zoom{gap:4px}.z-reference-reader.is-compact{background:var(--z-desk-charcoal)}.z-reference-reader.is-compact .z-reference-reader-header{padding:6px 12px}.z-reference-reader.is-compact .z-reference-reader-controls{gap:6px}.z-reference-reader.is-compact .z-reference-reader-desk{background:var(--z-desk-charcoal);padding:8px}.z-reference-reader.is-compact .z-reference-reader-page{box-shadow:none}.z-reference-reader.is-compact .z-reference-reader-footer{padding:5px 12px}.z-reference-reader.is-compact .z-reference-reader-return.is-compact{flex-shrink:0;place-items:center;width:32px;min-height:34px;padding:0;display:grid}.z-reference-reader-pages{margin-inline:auto;position:relative}.z-reference-reader-desk{overflow-anchor:none}.z-study-header{z-index:30;border-bottom:1px solid var(--z-desk-border);background:var(--z-desk-ink);flex:none;align-items:center;gap:8px;width:100%;min-width:0;min-height:52px;padding:8px 16px;display:flex;position:relative}@supports (color:color-mix(in lab, red, red)){.z-study-header{background:color-mix(in srgb, var(--z-desk-ink) 92%, black)}}.z-study-header{color:var(--z-desk-text)}.z-study-mark{background:#13120e;border:1px solid #dec27b47;border-radius:50%;flex:none;place-items:center;width:36px;height:36px;display:grid}.z-study-mark img{-webkit-user-drag:none;width:28px;height:28px}.z-study-tabs{--z-tab-pad:4px;padding:var(--z-tab-pad);background:linear-gradient(180deg, #00000047, #0000001f), var(--z-desk-charcoal);border:1px solid #dec27b2e;border-radius:12px;grid-template-columns:repeat(3,minmax(0,1fr));align-items:center;margin-inline-start:8px;display:grid;position:relative;box-shadow:inset 0 1px 2px #00000073,0 1px #eee4ce0a}@media (min-width:761px){.z-study-tabs{margin:0;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}}.z-study-tab-paper{top:var(--z-tab-pad);bottom:var(--z-tab-pad);width:calc((100% - 2 * var(--z-tab-pad)) / 3);background:linear-gradient(180deg, var(--z-desk-gold), var(--z-desk-gold));border-radius:8px;position:absolute;inset-inline-start:calc(var(--z-tab-pad) + var(--z-tab-index,0) * (100% - 2 * var(--z-tab-pad)) / 3)}@supports (color:color-mix(in lab, red, red)){.z-study-tab-paper{background:linear-gradient(180deg, color-mix(in srgb, var(--z-desk-gold) 82%, white), var(--z-desk-gold))}}.z-study-tab-paper{transition:inset-inline-start .32s cubic-bezier(.3,.7,.2,1);box-shadow:0 2px 8px #c69a3859,inset 0 1px #ffffff59}.z-study-tab{z-index:1;min-height:32px;color:var(--z-desk-muted);white-space:nowrap;border-radius:8px;justify-content:center;align-items:center;gap:7px;padding:0 16px;font-size:13.5px;font-weight:600;text-decoration:none;transition:color .2s;display:inline-flex;position:relative}.z-study-tab svg{flex:none;width:15px;height:15px;transition:color .2s}.z-study-tab:hover{color:var(--z-desk-text)}.z-study-tab:hover svg{color:var(--z-desk-gold-soft)}.z-study-tab:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:1px}.z-study-tab.active,.z-study-tab.active svg,.z-study-tab.active:hover svg{color:var(--z-desk-gold-on)}@media (prefers-reduced-motion:reduce){.z-study-tab-paper{transition:none}}.z-study-header-tools{align-items:center;gap:8px;min-width:0;margin-inline-start:auto;display:flex}.z-study-header-end{flex:none;align-items:center;gap:8px;display:flex}.z-study-menu-wrap{position:relative}.z-study-avatar{-webkit-appearance:none;appearance:none;border:1px solid var(--z-desk-border);background:var(--z-desk-panel,#eee4ce14);width:34px;height:34px;color:var(--z-desk-text);cursor:pointer;border-radius:50%;place-items:center;font-size:12px;font-weight:650;display:grid}.z-study-avatar:hover,.z-study-menu-wrap.open>.z-study-avatar{color:var(--z-desk-gold-soft);border-color:#dec27b8c}.z-study-avatar:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:2px}.z-study-avatar.static{width:38px;height:38px;color:var(--z-desk-gold-soft);cursor:default;background:#c69a381f;border-color:#dec27b52;flex:none;font-size:13px}.z-study-menu{z-index:40;border:1px solid var(--z-desk-border);background:var(--z-desk-ink);top:calc(100% + 8px);border-radius:12px;grid-template-columns:minmax(0,1fr);width:260px;min-width:0;max-width:calc(100vw - 72px);max-height:min(70vh,420px);padding:8px;display:grid;position:absolute;inset-inline-end:0;overflow:auto}@supports (color:color-mix(in lab, red, red)){.z-study-menu{background:color-mix(in srgb, var(--z-desk-ink) 94%, black)}}.z-study-menu{box-shadow:0 18px 40px #00000059}.z-study-menu a,.z-study-menu button{-webkit-appearance:none;appearance:none;width:100%;min-height:36px;color:var(--z-desk-text);font:500 13.5px/1.3 var(--z-font-console), var(--z-font-sans), sans-serif;text-align:start;cursor:pointer;background:0 0;border:0;border-radius:8px;align-items:center;gap:10px;padding:6px 10px;text-decoration:none;display:flex}.z-study-menu svg{flex:0 0 16px;width:16px;height:16px}.z-study-menu a>span,.z-study-menu button>span,.z-study-menu-head>div{overflow-wrap:anywhere;min-width:0}.z-study-menu a:hover,.z-study-menu button:hover,.z-study-menu a.active,.z-study-menu button.active{background:#c69a381f}:is(.z-study-menu a:focus-visible,.z-study-menu button:focus-visible){outline:2px solid var(--z-desk-gold);outline-offset:-2px}.z-study-menu.account{width:248px;padding:6px}.z-study-menu.account svg{color:var(--z-desk-muted)}.z-study-menu.account a:hover svg,.z-study-menu.account button:not(.danger):hover svg{color:var(--z-desk-gold-soft)}.z-study-menu button.danger,.z-study-menu.account button.danger svg{color:#e7b0a3}.z-study-menu button.danger:hover{background:#b05c4229}.z-study-menu p,.z-study-menu-label{color:var(--z-desk-faint);margin:4px 10px;font-size:12px}.z-study-menu-label{letter-spacing:.04em;text-transform:uppercase;margin-top:8px;font-weight:650}.z-study-menu-rule{background:var(--z-desk-border);height:1px;margin:6px 4px}.z-study-menu-head{align-items:center;gap:12px;padding:10px 10px 8px;display:flex}.z-study-menu-head strong{color:var(--z-desk-text);font:600 15px/1.25 var(--z-font-display,Fraunces), serif;display:block}.z-study-menu-head small{color:var(--z-desk-muted);overflow-wrap:anywhere;margin-top:2px;font-size:12px;display:block}.z-practice-shell.z-chat-frame{--z-console-sidebar-width:0px;flex-direction:column!important;grid-template-rows:none!important;grid-template-columns:none!important;display:flex!important}.z-chat-frame:has(.z-study-header){--z-console-sidebar-width:0px;flex-direction:column!important;grid-template-rows:none!important;grid-template-columns:none!important;display:flex!important}.z-chat-frame:has(.z-study-chrome){--z-console-sidebar-width:0px;flex-direction:column!important;grid-template-rows:none!important;grid-template-columns:none!important;display:flex!important}.z-study-header,.z-study-chrome{flex-direction:column;flex:none;width:100%;min-width:0;display:flex}.z-study-header{flex-direction:row}:is(.z-practice-shell .z-practice-main,.z-chat-frame:has(.z-study-header) .z-chat-main,.z-chat-frame:has(.z-study-chrome) .z-chat-main){flex:auto;width:100%;min-width:0;min-height:0;grid-area:auto!important}.z-practice-shell.exercise-active .z-practice-main{flex:auto}@media (max-width:760px){.z-study-tabs{margin-inline-start:4px}.z-study-tab{gap:5px;min-height:30px;padding:0 10px;font-size:13px}.z-study-tab svg{width:14px;height:14px}.z-study-header{padding-inline:10px}}.z-study-get-app{border:1px solid var(--z-desk-line,#eee4ce2e);min-height:34px;color:inherit;white-space:nowrap;border-radius:8px;align-items:center;gap:7px;padding:0 12px;font-size:13.5px;font-weight:600;text-decoration:none;display:inline-flex}:is(.z-study-get-app:hover,.z-study-get-app:focus-visible){background:#eee4ce0f}@media (max-width:760px){.z-study-get-app span{display:none}.z-study-get-app{padding:0 9px}}@media (max-width:480px){.z-study-tab{min-width:46px;padding:0 12px}.z-study-tab-label{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}}@media (max-width:640px){.z-practice-main.problem-active{padding:0}.z-practice-problem:not(.z-practice-exercise-loading){background:var(--z-console-focus-panel);grid-template:"context context""source source""companion companion""work work"minmax(0,1fr)"pen tools"/minmax(0,1fr) auto}.z-practice-problem>*,.z-practice-problem .z-practice-scratch>*{grid-column:span 2}.z-practice-problem .z-guest-turnstile:empty,.z-practice-problem .z-pdf-sticky-source-title{display:none}.z-practice-exercise-loading .z-practice-problem-head{background:var(--z-desk-ink,#1f1d18);min-height:44px;padding:4px 14px}.z-practice-exercise-loading .z-practice-loading-scratch{border-radius:0}.z-practice-problem .z-practice-scratch,.z-practice-problem .z-pdf-sticky-card.composer.focus,.z-practice-problem .z-pdf-sticky-card.composer.focus:hover,.z-practice-problem .z-pdf-sticky-card.composer.focus:focus-within,.z-practice-problem .z-pdf-sticky-card.composer.focus>header.z-pdf-sticky-focus-header{display:contents}.z-practice-problem .z-pdf-sticky-focus-context{background:var(--z-desk-ink,#1f1d18);grid-area:context;align-items:center;gap:10px;min-width:0;min-height:44px;margin:0;padding:4px 14px 4px 6px;display:flex}[dir=rtl] .z-practice-problem .z-pdf-sticky-focus-context{padding:4px 6px 4px 14px}.z-practice-problem .z-pdf-sticky-focus-back{justify-content:center;min-width:40px;min-height:40px}.z-practice-problem .z-pdf-sticky-focus-back span{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.z-practice-problem .z-pdf-sticky-focus-meta{white-space:nowrap;flex:auto;min-width:0;overflow:hidden}.z-practice-problem .z-pdf-sticky-focus-meta strong{text-overflow:ellipsis;overflow:hidden}.z-practice-problem .z-pdf-sticky-card.composer.focus .z-pdf-sticky-source{border-bottom:1px solid var(--z-console-focus-border);background:var(--z-console-focus-panel);grid-area:source;min-height:0;max-height:26dvh;padding:12px 16px;overflow:auto}.z-practice-problem .z-pdf-sticky-card.composer.focus .z-pdf-sticky-source-content{line-height:1.55;font-size:16.5px!important}.z-practice-problem .z-pdf-sticky-card.composer.focus .z-pdf-sticky-work-area{box-shadow:none;border:0;border-radius:0;grid-area:work;margin:0}.z-practice-problem .z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-prompt{font-size:17px;inset-block-start:18px;inset-inline-start:30px}[dir=rtl] .z-practice-problem .z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-prompt{inset-inline:auto 30px}.z-practice-problem .z-pdf-sticky-focus-toolbar,.z-practice-problem .z-pdf-sticky-focus-controls{border-top:1px solid var(--z-console-focus-border);background:var(--z-desk-ink,#1f1d18);min-width:0;padding-block:8px calc(8px + env(safe-area-inset-bottom));align-items:center;display:flex}.z-practice-problem .z-pdf-sticky-focus-toolbar{grid-area:pen;padding-inline:10px 6px}.z-practice-problem .z-pdf-sticky-focus-controls{grid-area:tools;gap:6px;padding-inline:0 10px;overflow:visible}.z-practice-problem:not(:has(.z-pdf-sticky-focus-toolbar)) .z-pdf-sticky-focus-controls{grid-column:1/-1;padding-inline-start:10px}.z-practice-problem .z-pdf-sticky-focus-meta span:first-of-type{display:none}.z-practice-problem .z-pdf-sticky-focus-ink-tools{scrollbar-width:none;flex:auto;min-width:0;overflow-x:auto;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 28px),#0000);mask-image:linear-gradient(90deg,#000 calc(100% - 28px),#0000)}[dir=rtl] .z-practice-problem .z-pdf-sticky-focus-ink-tools{-webkit-mask-image:linear-gradient(270deg,#000 calc(100% - 28px),#0000);mask-image:linear-gradient(270deg,#000 calc(100% - 28px),#0000)}.z-practice-problem .z-pdf-sticky-focus-ink-tools::-webkit-scrollbar{display:none}.z-practice-problem .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools button,.z-practice-problem .z-pdf-sticky-card.composer.focus header .z-pdf-sticky-focus-ink-tools summary{flex:0 0 40px;width:40px;min-width:40px;height:40px}.z-practice-problem .z-study-audio{display:none}.z-practice-problem .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-header-command{flex:none;min-height:44px;padding-inline:14px;font-size:14px}.z-practice-problem .z-pdf-sticky-card.composer.focus:has(.z-pdf-sticky-tutor-tile)>.z-pdf-sticky-source{padding-inline-end:16px}.z-practice-problem:has(>.z-practice-tutor) .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile{margin:0}.z-practice-problem .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile{touch-action:manipulation;width:8.75rem;min-height:48px;box-shadow:none;border-radius:14px;flex:none;grid-template-columns:auto minmax(0,1fr);place-items:center start;gap:0 12px;padding-block:3px;padding-inline:10px 12px;position:static;translate:none}.z-practice-problem .z-pdf-sticky-tutor-tile>span:first-child{grid-row:1/3;margin:0}.z-practice-problem .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-tutor-tile>span>svg[data-state]{width:42px;height:42px}.z-practice-problem .z-pdf-sticky-card.composer.focus header button.z-pdf-sticky-visualization-command{justify-content:center;width:44px;padding-inline:0}.z-practice-problem .z-pdf-sticky-visualization-command span{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.z-practice-problem .z-practice-tutor{border-width:0 0 1px;border-radius:0 0 16px 16px;grid-area:companion;width:auto;max-height:min(36dvh,340px);position:static;inset:auto;box-shadow:0 10px 22px #17150f1a}.z-practice-problem .z-practice-tutor>header{padding:4px 8px 4px 12px}.z-practice-problem .z-practice-tutor-body{margin:10px 14px;font-size:14px;line-height:1.45}.z-practice-problem.companion-open .z-pdf-sticky-review-error,.z-practice-problem .z-pdf-sticky-attempt-ended{display:none}.z-practice-problem .z-pdf-sticky-card.composer.focus .z-pdf-sticky-canvas-shell.is-terminal canvas{opacity:.6}.z-practice-problem .z-practice-tutor .z-practice-actions button{min-height:40px}}html[data-zohal-capture] .z-study-audio,html[data-zohal-capture] .z-pdf-sticky-share-command,html[data-zohal-capture] .z-pdf-sticky-visualization-command,html[data-zohal-capture] .z-pdf-sticky-focus-meta>span,html[data-zohal-capture] .z-practice-tutor .z-study-companion-tabs button:not(.active),html[data-zohal-capture] .z-practice-tutor .z-practice-actions,html[data-zohal-capture] .z-practice-tutor>header img,html[data-zohal-capture] .z-toast.info,html[data-zohal-capture] nextjs-portal{display:none!important}html[data-zohal-capture] *,html[data-zohal-capture] :before,html[data-zohal-capture] :after{scrollbar-width:none}.z-document-library-page{background:var(--z-console-bg)}.z-page-panel,.z-document-library,.z-document-empty-card,.z-document-reader-main,.z-pdf-stage,.z-pdf-thumbs,.z-pdf-context{border-color:var(--z-console-border);background:var(--z-console-panel);color:var(--z-console-text);box-shadow:none}.z-document-list article{border-color:var(--z-console-border);background:var(--z-console-panel)}.z-document-list article.active{border-color:var(--z-console-accent-border);background:var(--z-console-accent-soft)}.z-chat-main>.z-document-reader{height:100%;min-height:0;grid-row:1/-1;block-size:calc(100vh - 58px);min-block-size:calc(100vh - 58px)}.z-document-reader{background:var(--z-console-bg);align-items:stretch}.z-document-reader-main{background:var(--z-console-bg);height:100%;min-height:0;block-size:100%;min-block-size:0;box-shadow:none;border:0;border-radius:0;align-self:stretch;margin:0;padding:14px}.z-document-empty-reader{background:radial-gradient(850px 420px at 72% -8%, #c69a3812, transparent 62%), var(--z-desk-ink);place-items:center;height:100%;min-height:100%;padding:clamp(18px,5vw,48px);display:grid;position:relative;overflow:hidden}.z-document-empty-card{background:var(--z-desk-paper);width:min(520px,100%);color:var(--z-desk-ink-text);text-align:center;box-shadow:var(--z-desk-shadow);border:1px solid #ffffff24;border-radius:12px;justify-items:center;gap:16px;padding:clamp(28px,5vw,44px);display:grid}.z-document-empty-card>svg{width:34px;height:34px;color:var(--z-desk-gold)}.z-document-empty-card h2{color:var(--z-desk-ink-text);font-family:var(--z-font-display), Georgia, serif;letter-spacing:-.04em;margin:0 0 8px;font-size:clamp(28px,4vw,44px);font-weight:500;line-height:.98}.z-document-empty-card p{color:#665f54;margin:0;font-size:14px;line-height:1.6}.z-document-empty-status{border:1px solid var(--z-console-border);background:var(--z-console-input);border-radius:8px;justify-items:center;gap:4px;padding:10px 12px;display:grid}.z-document-empty-status span{color:var(--z-console-faint);font-family:var(--z-font-mono,ui-monospace, monospace);letter-spacing:.08em;text-transform:uppercase;font-size:10px;font-weight:780}.z-document-empty-actions{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.z-document-empty-actions button{align-items:center;gap:8px;display:inline-flex}.z-document-empty-actions button svg{width:15px;height:15px}[dir=ltr] .z-document-reader-main{margin:0}.z-document-reader .z-pdf-workbench{border:1px solid var(--z-console-border);background:var(--z-desk-paper-2);height:100%;block-size:100%;min-block-size:100%;min-height:0;box-shadow:var(--z-desk-shadow);border-radius:12px;align-self:stretch;gap:0;overflow:hidden}:is(.z-document-reader .z-pdf-workbench:has(.z-pdf-sticky-notes-layer),.z-document-reader .z-pdf-stage:has(.z-pdf-sticky-notes-layer)){overflow:visible}.z-document-reader .z-pdf-thumbs{border:0;border-inline-end:1px solid var(--z-console-border);background:var(--z-desk-charcoal);border-radius:0;height:100%;min-height:0;padding:12px}.z-document-reader .z-pdf-thumbs button{border-color:var(--z-console-border);background:var(--z-desk-paper);color:var(--z-ink)}.z-document-reader .z-pdf-stage{background:var(--z-desk-paper-2);height:100%;min-height:0;block-size:100%;box-shadow:none;border:0;border-radius:0;align-self:stretch}.z-document-reader .z-pdf-toolbar{border-bottom-color:var(--z-console-border);background:var(--z-console-panel);color:var(--z-console-text)}.z-document-reader .z-pdf-page-scroll{background:var(--z-desk-paper-2);height:100%;min-height:0;padding:26px}.z-document-reader .z-pdf-page-stack{flex:none;min-width:max-content}.z-document-reader .z-pdf-page-controls:not(.z-zoom-group) button{border-color:var(--z-console-border-strong);background:var(--z-console-panel);color:var(--z-console-text)}@keyframes z-document-action-sheet-spin{to{transform:rotate(360deg)}}.z-chat-frame.document-reader-active{grid-template-rows:auto minmax(0,1fr)}.z-chat-frame.document-reader-active:not(:has(.z-document-reader-topbar-cinema)){grid-template-rows:minmax(0,1fr)}.z-chat-frame.document-reader-active:not(:has(.z-document-reader-topbar-cinema)) .z-chat-main.document-reader-active{grid-row:1}.z-chat-main.document-reader-active{min-width:0;min-height:0;display:block;position:relative;overflow:hidden}.z-chat-main.document-reader-active>.z-document-reader{grid-template-columns:minmax(320px, min(var(--z-document-chat-pane-width,420px), 32vw)) 14px minmax(0, 1fr);grid-template-rows:minmax(0,1fr);width:100%;min-width:0;height:100%;min-height:0;display:grid;position:absolute;inset:0;overflow:hidden}.z-chat-main.document-reader-active>.z-document-reader.pane-closed{grid-template-columns:minmax(0,1fr)}.z-chat-main.document-reader-active .z-document-reader-main{grid-area:1/3}.z-chat-main.document-reader-active .z-document-reader.pane-closed .z-document-reader-main{grid-column:1}[dir=rtl] .z-chat-main.document-reader-active>.z-document-reader{grid-template-columns:minmax(0, 1fr) 14px minmax(320px, min(var(--z-document-chat-pane-width,420px), 32vw))}[dir=rtl] .z-chat-main.document-reader-active>.z-document-reader.pane-closed{grid-template-columns:minmax(0,1fr)}[dir=rtl] .z-chat-main.document-reader-active .z-document-reader-main{grid-column:1}.z-chat-main.document-reader-active .z-document-reader-main,.z-chat-main.document-reader-active .z-pdf-workbench,.z-chat-main.document-reader-active .z-pdf-thumbs,.z-chat-main.document-reader-active .z-pdf-stage,.z-chat-main.document-reader-active .z-pdf-page-scroll{min-width:0;max-width:100%;min-height:0}.z-chat-main.document-reader-active .z-document-reader-main,.z-chat-main.document-reader-active .z-pdf-workbench,.z-chat-main.document-reader-active .z-pdf-stage{align-self:stretch;height:100%}.z-chat-main.document-reader-active .z-document-reader-main{grid-template-rows:minmax(0,1fr);display:grid}.z-chat-main.document-reader-active .z-pdf-workbench{grid-template-rows:minmax(0,1fr);grid-template-columns:minmax(0,1fr) 148px}.z-chat-main.document-reader-active .z-pdf-stage{grid-area:1/1;grid-template-rows:auto minmax(0,1fr)}.z-chat-main.document-reader-active .z-pdf-thumbs{border-inline-start:1px solid var(--z-desk-border);border-inline-end:0;flex-direction:column;grid-area:1/2;align-items:stretch;gap:18px;width:148px;min-width:148px;padding:14px 14px 20px;display:flex;overflow:hidden auto}.z-chat-main.document-reader-active .z-pdf-thumbs .z-pdf-document-rail{border-block-end:1px solid var(--z-desk-border);padding:0 0 12px;display:block}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tabs{gap:2px;display:grid}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab,.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-add{width:100%;color:var(--z-desk-muted);text-align:start;cursor:pointer;background:0 0;justify-content:flex-start;align-items:center;gap:8px;transition:background .16s,border-color .16s,color .16s;display:flex}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab{border:0;border-inline-start:2px solid #0000;border-radius:0;min-height:34px;padding:4px 8px 4px 10px;position:relative;overflow:hidden}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab:hover{background:var(--z-desk-hover);color:var(--z-desk-text)}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab.active{border-inline-start-color:var(--z-desk-gold);color:var(--z-desk-text)}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab>span{color:var(--z-desk-faint);font:680 10px/1 var(--z-font-mono), ui-monospace, monospace;flex:none}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab.active>span{color:var(--z-desk-gold-soft)}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab strong{text-overflow:ellipsis;white-space:nowrap;min-width:0;color:inherit;font:600 12.5px/1.25 var(--z-font-sans), sans-serif;display:block;overflow:hidden}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab small{display:none}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-add{border:1px dashed var(--z-desk-border-strong);border-radius:8px;justify-content:center;min-height:30px;padding:0}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-add:hover:not(:disabled){border-color:var(--z-desk-gold-border);color:var(--z-desk-gold-soft)}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-add:disabled{cursor:not-allowed;opacity:.45}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-add svg{color:currentColor;width:17px;height:17px}.z-chat-main.document-reader-active .z-pdf-thumbs>button{width:100%;min-width:0;color:inherit;text-align:center;box-shadow:none;background:0 0;border:0;border-radius:0;flex:none;align-content:start;justify-items:center;gap:8px;padding:5px 5px 0;overflow:visible}.z-chat-main.document-reader-active .z-pdf-thumbs canvas{background:#fff;border:0;border-radius:0;max-width:100%;margin-inline:auto;display:block;width:100%!important;height:auto!important}.z-chat-main.document-reader-active .z-pdf-thumb-preview{outline-offset:3px;background:#fff;border:0;border-radius:2px;outline:2px solid #0000;width:100%;transition:outline-color .14s,transform .14s;display:block;overflow:hidden;box-shadow:0 8px 18px #00000061}.z-chat-main.document-reader-active .z-pdf-thumbs>button:hover .z-pdf-thumb-preview{transform:translateY(-2px)}.z-chat-main.document-reader-active .z-pdf-thumbs>button.active .z-pdf-thumb-preview{outline-color:var(--z-desk-gold)}.z-chat-main.document-reader-active .z-pdf-thumb-info strong{color:var(--z-desk-faint);font:680 10px/1 var(--z-font-mono), ui-monospace, monospace;letter-spacing:.06em;text-transform:uppercase}.z-chat-main.document-reader-active .z-pdf-thumbs>button.active .z-pdf-thumb-info strong{color:var(--z-desk-gold-soft)}.z-chat-main.document-reader-active .z-pdf-page-scroll{overflow:auto}.z-chat-main.document-reader-active .z-chat-thread{color:var(--z-console-text);background:var(--z-console-bg)!important}.z-chat-main.document-reader-active .z-pdf-workbench,.z-chat-main.document-reader-active .z-pdf-stage,.z-chat-main.document-reader-active .z-pdf-thumbs,.z-chat-main.document-reader-active .z-pdf-page-scroll{color:var(--z-desk-text);background:var(--z-desk-ink)!important}.z-chat-main.document-reader-active .z-pdf-toolbar{border-bottom:1px solid var(--z-desk-paper-edge);background:var(--z-desk-paper);min-height:48px;color:var(--z-desk-ink-text);-webkit-backdrop-filter:none;backdrop-filter:none}.z-chat-main.document-reader-active .z-pdf-toolbar-action{font:600 12px/1 var(--z-font-sans), sans-serif}.z-chat-main.document-reader-active .z-pdf-page-frame canvas{box-shadow:var(--z-desk-shadow)}.z-chat-main.document-reader-active .z-chat-composer-wrap{border-color:var(--z-console-border);color:var(--z-console-text);background:var(--z-console-panel)!important}.z-inspector{border-color:var(--z-console-border);color:var(--z-console-text);box-shadow:none;background:var(--z-console-bg)!important}.z-inspector:before{background:var(--z-console-border)}.z-inspector-row{border-color:var(--z-console-border);color:var(--z-console-text);box-shadow:none;background:var(--z-console-panel)!important}.z-inspector p,.z-inspector .z-chat-kicker{color:var(--z-console-muted)}.z-chat-main.document-reader-active .z-pdf-toolbar-left,.z-chat-main.document-reader-active .z-pdf-toolbar-center,.z-chat-main.document-reader-active .z-pdf-toolbar-right{align-items:center;gap:8px;display:flex}.z-chat-main.document-reader-active .z-pdf-toolbar{grid-template-columns:minmax(0,1fr) max-content;position:relative}.z-chat-main.document-reader-active .z-pdf-toolbar-center{z-index:1;justify-content:center;gap:10px;width:min(760px,48vw);position:absolute;inset-block-start:50%;inset-inline-start:50%;transform:translate(-50%,-50%)}.z-chat-main.document-reader-active .z-pdf-toolbar-right{z-index:2;grid-column:2;justify-content:flex-end;gap:8px}.z-chat-main.document-reader-active .z-pdf-toolbar-identity,.z-chat-main.document-reader-active .z-pdf-toolbar-trailing{flex:none;align-items:center;min-width:0;display:inline-flex}.z-chat-main.document-reader-active .z-pdf-toolbar-protection{align-items:center;gap:8px;min-width:0;display:inline-flex}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-tool-hub{flex:none;width:auto;position:relative}.z-chat-main.document-reader-active .z-pdf-thumbs h3{color:var(--z-console-muted)}.z-chat-main.document-reader-active .z-pdf-tool-hub-trigger{border-color:var(--z-console-accent-border)}@supports (color:color-mix(in lab, red, red)){.z-chat-main.document-reader-active .z-pdf-tool-hub-trigger{border-color:color-mix(in srgb, var(--z-console-accent-border) 72%, var(--z-console-border))}}.z-chat-main.document-reader-active .z-pdf-tool-hub-trigger{background:var(--z-console-panel-raised)}@supports (color:color-mix(in lab, red, red)){.z-chat-main.document-reader-active .z-pdf-tool-hub-trigger{background:color-mix(in srgb, var(--z-console-panel-raised) 92%, transparent)}}@media (max-width:760px){.z-chat-frame.document-reader-active{grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr}.z-chat-frame.document-reader-active:not(:has(.z-document-reader-topbar-cinema)){grid-template-rows:auto minmax(0,1fr)}.z-chat-frame.document-reader-active:not(:has(.z-document-reader-topbar-cinema)) .z-chat-main.document-reader-active{grid-row:2}.z-chat-main.document-reader-active>.z-document-reader,[dir=rtl] .z-chat-main.document-reader-active>.z-document-reader{grid-template-rows:minmax(0,1fr);grid-template-columns:minmax(0,1fr);position:absolute;inset:0}.z-chat-main.document-reader-active .z-document-reader-main,[dir=rtl] .z-chat-main.document-reader-active .z-document-reader-main{grid-area:1/1;padding:8px}.z-chat-main.document-reader-active .z-pdf-workbench{grid-template-rows:minmax(0,1fr) auto;grid-template-columns:minmax(0,1fr)}.z-chat-main.document-reader-active .z-pdf-stage{grid-area:1/1;min-height:0}.z-chat-main.document-reader-active .z-pdf-toolbar{grid-template-columns:minmax(0,1fr);align-items:stretch;gap:8px;padding:8px}.z-chat-main.document-reader-active .z-pdf-toolbar-left,.z-chat-main.document-reader-active .z-pdf-toolbar-center,.z-chat-main.document-reader-active .z-pdf-toolbar-right{width:100%;min-width:0}.z-chat-main.document-reader-active .z-pdf-toolbar-left{justify-content:flex-start}.z-chat-main.document-reader-active .z-pdf-toolbar-right{justify-content:stretch}.z-chat-main.document-reader-active .z-pdf-toolbar-actions{justify-content:stretch;width:100%}.z-chat-main.document-reader-active .z-pdf-toolbar-action{flex:1 1 0;min-width:0}.z-chat-main.document-reader-active .z-pdf-page-controls{flex:none}.z-chat-main.document-reader-active .z-pdf-page-scroll{justify-content:flex-start;padding:12px}.z-chat-main.document-reader-active .z-pdf-page-frame{max-width:none}.z-chat-main.document-reader-active .z-pdf-thumbs{border-block-start:1px solid var(--z-console-border);scrollbar-width:thin;border-inline-start:0;flex-direction:row;grid-area:2/1;align-items:stretch;gap:8px;width:100%;min-width:0;height:116px;min-height:116px;padding:8px;display:flex;overflow:auto hidden}.z-chat-main.document-reader-active .z-pdf-thumbs .z-pdf-document-rail{border-block-end:0;border-inline-end:1px solid var(--z-console-border);min-width:max-content}@supports (color:color-mix(in lab, red, red)){.z-chat-main.document-reader-active .z-pdf-thumbs .z-pdf-document-rail{border-inline-end:1px solid color-mix(in srgb, var(--z-console-border) 72%, transparent)}}.z-chat-main.document-reader-active .z-pdf-thumbs .z-pdf-document-rail{padding-block-end:0;padding-inline-end:8px}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tabs{grid-template-columns:none;align-items:stretch;gap:8px;height:100%;display:flex}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab,.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-add{aspect-ratio:auto;width:72px;min-width:72px;min-height:0}.z-chat-main.document-reader-active .z-pdf-thumbs h3{border:1px solid var(--z-console-border);background:var(--z-console-panel-raised);text-align:center;border-radius:10px;place-items:center;width:58px;min-width:58px;margin:0;display:grid}.z-chat-main.document-reader-active .z-pdf-thumbs button{width:86px;min-width:86px;max-width:86px;padding:6px}.z-chat-main.document-reader-active .z-pdf-thumb-preview{height:58px}.z-chat-main.document-reader-active .z-pdf-thumbs canvas{width:100%!important;height:auto!important}.z-chat-main.document-reader-active .z-pdf-thumb-info{gap:1px}.z-chat-main.document-reader-active .z-pdf-thumb-info strong,.z-chat-main.document-reader-active .z-pdf-thumb-info span{text-overflow:ellipsis;white-space:nowrap;font-size:10px;overflow:hidden}}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-workbench{grid-template-columns:minmax(0,1fr);background:var(--z-desk-ink)!important}:is(.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-stage,.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-page-scroll){background:var(--z-desk-ink)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-pdf-thumbs{display:none!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock{--z-console-focus-assistant-bg:var(--z-desk-charcoal);--z-console-focus-assistant-surface:var(--z-desk-panel);--z-console-focus-assistant-status:var(--z-desk-panel);--z-console-focus-assistant-border:var(--z-desk-border);--z-console-focus-panel:var(--z-desk-panel);--z-console-focus-panel-raised:var(--z-desk-charcoal);--z-console-focus-border:var(--z-desk-border);--z-console-focus-border-strong:var(--z-desk-border-strong);--z-console-focus-text:var(--z-desk-text);--z-console-focus-muted:var(--z-desk-muted);--z-console-focus-faint:var(--z-desk-faint)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded{border-color:var(--z-console-focus-assistant-border);background:var(--z-console-focus-assistant-bg);color:var(--z-console-focus-text);box-shadow:var(--z-desk-shadow);-webkit-backdrop-filter:none;backdrop-filter:none}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded>header{border-block-end-color:var(--z-console-focus-assistant-border);background:var(--z-console-focus-assistant-surface);padding:13px 14px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded>header strong{color:var(--z-console-focus-text);font-family:var(--z-font-sans), sans-serif;letter-spacing:-.012em;font-size:14px;font-weight:790}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded>header div button:not(:first-child){display:none}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-icon-button{border-color:var(--z-console-focus-border);background:var(--z-desk-hover);color:var(--z-console-focus-muted)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded>header button{border-color:var(--z-console-focus-border);background:var(--z-desk-hover);color:var(--z-console-focus-muted)}:is(.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-status,.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-chat-v2-body-status){color:var(--z-console-focus-text)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-status{border-block-end-color:var(--z-console-focus-assistant-border);background:var(--z-console-focus-assistant-status);font-family:var(--z-font-sans), sans-serif;padding:9px 12px;font-size:12px;font-weight:650}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-status>span:not(.z-document-assistant-status-tick){color:var(--z-console-focus-muted);font-family:var(--z-font-mono), monospace;letter-spacing:.09em;font-size:9px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant .z-chat-bubble{border:1px solid var(--z-console-focus-assistant-border)!important;background:var(--z-console-focus-assistant-surface)!important;border-radius:14px!important;padding:16px 17px!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant.pending .z-chat-bubble{border:1px solid var(--z-console-focus-assistant-border)!important;background:var(--z-console-focus-assistant-surface)!important;border-radius:14px!important;padding:16px 17px!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.user .z-chat-bubble{border-color:var(--z-console-focus-border-strong);background:var(--z-desk-panel-raised)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-bubble p{font-family:var(--z-font-sans), sans-serif;color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response{font-family:var(--z-font-sans), sans-serif;color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response p{font-family:var(--z-font-sans), sans-serif;color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response li{font-family:var(--z-font-sans), sans-serif;color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response strong{font-family:var(--z-font-sans), sans-serif;color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response em{font-family:var(--z-font-sans), sans-serif;color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response{font-size:13px;font-weight:470;line-height:1.76}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response p{font-size:13px;font-weight:470;line-height:1.76}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response li{font-size:13px;font-weight:470;line-height:1.76}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response>*{margin-block:0}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response>*+*{margin-block-start:13px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response strong{letter-spacing:-.008em;font-weight:760}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response .katex{margin:.16em .08em;line-height:1.35;display:inline-block}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response .katex-display{margin-block:14px;padding:15px 13px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response a{color:var(--z-desk-gold-soft)!important}:is(.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response blockquote,.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response small,.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response figcaption){color:var(--z-console-focus-muted)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-composer.z-chat-v2-composer{border-color:var(--z-console-focus-assistant-border);box-shadow:0 8px 22px #1e302712;background:var(--z-console-focus-assistant-surface)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-input{min-height:32px;max-height:92px;font-family:var(--z-font-sans), sans-serif;border:0;font-size:14px;font-weight:520;line-height:1.45;color:var(--z-console-focus-text)!important;background:0 0!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-input::placeholder{opacity:.74;color:var(--z-console-focus-muted)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-send{border-color:var(--z-console-accent-border);background:var(--z-console-accent);color:var(--z-console-accent-on)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-send:hover{border-color:var(--z-console-accent-hover-border);background:var(--z-console-accent-hover)}@media (min-width:761px){.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.expanded{width:360px;max-height:none;inset-block:14px;inset-inline:auto 14px}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.minimized{border:1px solid var(--z-desk-border-strong);background:var(--z-desk-charcoal);width:48px;min-width:48px;height:112px;min-height:0;color:var(--z-desk-text);box-shadow:var(--z-console-focus-shadow);border-inline-end:0;border-radius:14px 0 0 14px;flex-direction:column;justify-content:center;gap:6px;padding:12px 8px;font-size:11.5px;inset-block-start:50%;inset-inline:auto 0;transform:translateY(-50%)}[dir=rtl] .z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.minimized{border-radius:0 14px 14px 0}}@media (max-width:430px){.z-chat-main.document-reader-active .z-document-reader-main{padding:6px}.z-chat-main.document-reader-active .z-pdf-toolbar{padding:7px}.z-chat-main.document-reader-active .z-pdf-page-controls{gap:5px}.z-chat-main.document-reader-active .z-pdf-page-controls button{width:28px;height:28px}.z-chat-main.document-reader-active .z-pdf-tool-hub-trigger{border-color:var(--z-console-accent-border)}@supports (color:color-mix(in lab, red, red)){.z-chat-main.document-reader-active .z-pdf-tool-hub-trigger{border-color:color-mix(in srgb, var(--z-console-accent-border) 72%, var(--z-console-border))}}.z-chat-main.document-reader-active .z-pdf-tool-hub-trigger{background:var(--z-console-panel-raised)}@supports (color:color-mix(in lab, red, red)){.z-chat-main.document-reader-active .z-pdf-tool-hub-trigger{background:color-mix(in srgb, var(--z-console-panel-raised) 92%, transparent)}}.z-chat-main.document-reader-active .z-pdf-page-scroll{padding:10px}.z-chat-main.document-reader-active .z-pdf-thumbs{height:104px;min-height:104px;padding:7px}.z-chat-main.document-reader-active .z-pdf-thumbs h3{width:50px;min-width:50px}.z-chat-main.document-reader-active .z-pdf-thumbs button{width:78px;min-width:78px;max-width:78px}.z-chat-main.document-reader-active .z-pdf-thumb-preview{height:52px}}@media (max-width:1024px){.z-document-assistant-dock.minimized,.z-document-assistant-dock.compact{display:none!important}.z-document-empty-reader{height:100%;min-height:0;padding:12px 16px calc(16px + env(safe-area-inset-bottom,0px));flex-direction:column;justify-content:flex-start;align-items:stretch;display:flex}.z-document-empty-card{flex-direction:column;flex:auto;justify-content:center;align-items:center;width:100%;max-width:none;margin-top:8px;padding:clamp(24px,8vw,36px);display:flex}.z-chat-frame.document-reader-active{grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr}.z-chat-frame.document-reader-active>.z-chat-main{grid-column:1/-1}.z-chat-frame.document-reader-active .z-console-sidebar.open.collapsed{align-items:stretch;width:min(320px,86vw);min-width:0;max-width:calc(100vw - 28px);padding:14px 12px!important}.z-document-mobile-sheet-tools-body{gap:8px;padding:12px 16px 18px;display:grid}.z-document-mobile-tool-item{border:1px solid var(--z-console-border);background:var(--z-console-panel);width:100%;min-height:46px;color:var(--z-console-text);text-align:start;cursor:pointer;border-radius:14px;align-items:center;padding:0 14px;font-size:14px;font-weight:760;display:flex}.z-document-mobile-tool-item.active{border-color:var(--z-console-accent-border);background:var(--z-console-accent-soft)}.z-document-mobile-tool-item:disabled{opacity:.55;cursor:not-allowed}.z-chat-main.document-cinema-active>.z-document-reader,[dir=rtl] .z-chat-main.document-cinema-active>.z-document-reader{grid-template-rows:minmax(0,1fr);grid-template-columns:minmax(0,1fr);position:absolute;inset:0}.z-chat-main.document-cinema-active .z-document-reader-main,[dir=rtl] .z-chat-main.document-cinema-active .z-document-reader-main{grid-area:1/1;padding:0}.z-chat-main.document-cinema-active .z-pdf-workbench.cinema{background:var(--z-console-bg);border:0;border-radius:0;grid-template-rows:minmax(0,1fr);grid-template-columns:minmax(0,1fr)}.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-stage{background:var(--z-console-bg);border:0;border-radius:0;grid-template-rows:minmax(0,1fr);position:relative}.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-toolbar,.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-thumbs,.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-context{display:none}.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-page-scroll{background:var(--z-console-bg);text-align:center;place-items:start center;padding:0;display:grid;overflow:auto}.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-page-stack{gap:clamp(22px,4vh,42px);padding-block:clamp(20px,5vh,56px)}.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-page-frame{max-width:none;box-shadow:0 10px 34px #00000047}.z-chat-main.document-cinema-active .z-pdf-workbench.cinema .z-pdf-page-scroll canvas{max-width:none}.z-chat-main.document-cinema-active .z-pdf-tool-hub-cinema{z-index:6;position:absolute;inset-block-end:calc(16px + env(safe-area-inset-bottom,0px));inset-inline-end:16px}.z-document-mobile-sheet-overlay{z-index:70;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:12px 12px calc(12px + env(safe-area-inset-bottom,0px));background:#0507058f;align-items:end;display:grid;position:fixed;inset:0}.z-document-mobile-sheet{border:1px solid var(--z-console-border);background:var(--z-console-panel-raised);max-height:min(78vh,720px);color:var(--z-console-text);border-radius:22px;grid-template-rows:auto minmax(0,1fr);display:grid;overflow:hidden;box-shadow:0 18px 48px #00000057}.z-document-mobile-sheet-assistant{height:min(92vh,860px);max-height:min(92vh,860px)}.z-document-mobile-sheet-head{border-bottom:1px solid var(--z-console-border);justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;display:flex}.z-document-mobile-sheet-head strong{font-size:15px;font-weight:820}.z-document-mobile-sheet-head button{border:1px solid var(--z-console-border);background:var(--z-console-panel);width:36px;height:36px;color:var(--z-console-muted);border-radius:12px;justify-content:center;align-items:center;font-size:22px;line-height:1;display:inline-flex}.z-document-mobile-sheet-body{min-height:0;padding:14px 16px 16px;overflow:auto}.z-document-mobile-sheet-assistant .z-document-mobile-sheet-body{flex-direction:column;min-height:0;padding:0;display:flex}.z-document-mobile-sheet-assistant .z-document-mobile-sheet-body .z-chat-v2-page{height:100%;min-height:0}.z-chat-app .z-toast-stack{width:auto;inset-block-start:auto;inset-block-end:calc(16px + env(safe-area-inset-bottom,0px));inset-inline:16px}}.z-chat-main.document-reader-active>.z-document-reader,[dir=rtl] .z-chat-main.document-reader-active>.z-document-reader{min-width:0;display:grid;grid-template-columns:minmax(0,1fr)!important}.z-chat-main.document-reader-active .z-document-reader-main,[dir=rtl] .z-chat-main.document-reader-active .z-document-reader-main{min-width:0;padding:12px;grid-column:1!important}.z-chat-main.document-reader-active .z-document-reader .z-pdf-workbench{box-shadow:none;border:0;border-radius:0}.z-chat-main.document-reader-active .z-document-reader .z-pdf-page-scroll{padding-block-end:92px}.z-document-assistant-dock{z-index:130;position:fixed;inset-block-end:16px;inset-inline-start:16px}.z-chat-main.document-reader-active{--z-document-assistant-toolbar-expanded-offset:clamp(368px, 30vw, 432px);--z-document-assistant-toolbar-inset:14px;--z-document-assistant-mini-toolbar-inset:17px;--z-document-assistant-reopen-toolbar-inset:22px}.z-chat-main.document-reader-active .z-document-assistant-dock{position:absolute;inset-block-start:var(--z-document-assistant-toolbar-inset);inset-block-end:auto;inset-inline-start:26px}.z-chat-main.document-reader-active .z-document-assistant-dock.minimized{inset-block-start:var(--z-document-assistant-mini-toolbar-inset)}:is(.z-document-assistant-dock.minimized:hover,.z-document-assistant-dock.minimized:focus-visible){border-color:var(--z-desk-gold);box-shadow:0 0 0 3px var(--z-desk-gold-wash), 0 4px 12px #17150f38}.z-document-assistant-logo{object-fit:contain;mix-blend-mode:screen;flex:none;width:22px;height:22px}.z-document-assistant-dock.minimized .z-document-assistant-logo{width:24px;height:24px}.z-document-assistant-dock{border:1px solid var(--z-console-border-strong)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-dock{border:1px solid color-mix(in srgb, var(--z-console-border-strong) 55%, var(--z-notebook-paper) 6%)}}.z-document-assistant-dock{background:var(--z-desk-charcoal);color:var(--z-console-text);box-shadow:var(--z-desk-shadow)}.z-markdown-response .katex{direction:ltr;unicode-bidi:isolate;display:inline-block}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.focus-light{--z-console-text:var(--z-console-focus-text);--z-console-muted:var(--z-console-focus-muted);--z-console-faint:var(--z-console-focus-muted);--z-ink:var(--z-console-focus-text);--z-body:var(--z-console-focus-text);color:var(--z-console-focus-text)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.focus-light .z-chat-message.assistant .z-chat-bubble{color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.focus-light .z-markdown-response{color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.focus-light .z-markdown-response p{color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.focus-light .z-markdown-response li{color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.focus-light .z-markdown-response strong{color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.focus-light .z-markdown-response em{color:var(--z-console-focus-text)!important}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-document-assistant-dock.focus-light .z-markdown-response span{color:var(--z-console-focus-text)!important}.z-document-assistant-dock.compact,.z-document-assistant-dock.minimized{border-radius:18px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:7px;width:min(388px,100vw - 24px);padding:8px;display:grid}.z-document-assistant-dock.minimized{background:var(--z-desk-ink);width:auto;min-height:34px;color:var(--z-desk-text);font:650 12.5px/1 var(--z-font-sans), sans-serif;cursor:pointer;border-color:#0000;border-radius:999px;justify-content:center;gap:7px;padding:0 14px 0 6px;transition:border-color .14s,box-shadow .14s;display:inline-flex;box-shadow:inset 0 1px #ffffff0f,0 4px 12px #17150f38}.z-document-assistant-dock button{font:inherit}.z-document-assistant-add,.z-document-assistant-send,.z-document-assistant-dock.minimized>button:last-child{border:1px solid var(--z-console-border);place-items:center;width:34px;height:34px;display:grid}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-add,.z-document-assistant-send,.z-document-assistant-dock.minimized>button:last-child{border:1px solid color-mix(in srgb, var(--z-console-border) 74%, transparent)}}.z-document-assistant-add,.z-document-assistant-send,.z-document-assistant-dock.minimized>button:last-child{background:var(--z-console-panel-raised);border-radius:10px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-add,.z-document-assistant-send,.z-document-assistant-dock.minimized>button:last-child{background:color-mix(in srgb, var(--z-console-panel-raised) 68%, transparent)}}.z-document-assistant-add,.z-document-assistant-send,.z-document-assistant-dock.minimized>button:last-child{color:var(--z-console-text);cursor:pointer}.z-document-assistant-send{border-color:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-send{border-color:color-mix(in srgb, var(--z-console-accent) 45%, var(--z-console-border))}}.z-document-assistant-send{background:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-send{background:color-mix(in srgb, var(--z-console-accent) 18%, var(--z-console-panel-raised))}}.z-document-assistant-send{color:var(--z-console-accent)}.z-document-assistant-compact-input{min-width:0;color:var(--z-console-muted);text-align:start;cursor:pointer;background:0 0;border:0;padding:0 3px;font-size:14px;font-weight:620;overflow:hidden}.z-document-assistant-compact-input span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.z-document-assistant-dock.expanded{border-radius:20px;flex-direction:column;width:min(392px,100vw - 24px);max-height:calc(100dvh - 32px);display:flex;overflow:hidden}.z-chat-main.document-reader-active .z-document-assistant-dock.expanded{max-height:calc(100dvh - var(--z-document-assistant-toolbar-inset) - 16px)}.z-document-assistant-dock.expanded>header{border-block-end:1px solid var(--z-console-border);flex-shrink:0;justify-content:space-between;align-items:center;gap:10px;display:flex}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-dock.expanded>header{border-block-end:1px solid color-mix(in srgb, var(--z-console-border) 68%, transparent)}}.z-document-assistant-dock.expanded>header{background:var(--z-console-black)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-dock.expanded>header{background:color-mix(in srgb, var(--z-console-black) 18%, transparent)}}.z-document-assistant-dock.expanded>header{padding:10px}.z-document-assistant-dock.expanded>header span,.z-document-assistant-dock.expanded>header div{align-items:center;gap:8px;display:inline-flex}.z-document-assistant-dock.expanded>header strong{font-size:13px;font-weight:830}.z-document-assistant-icon-button,.z-document-assistant-dock.expanded>header button{border:1px solid var(--z-console-border);place-items:center;width:30px;height:30px;display:grid}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-icon-button,.z-document-assistant-dock.expanded>header button{border:1px solid color-mix(in srgb, var(--z-console-border) 72%, transparent)}}.z-document-assistant-icon-button,.z-document-assistant-dock.expanded>header button{background:var(--z-console-panel-raised);border-radius:10px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-icon-button,.z-document-assistant-dock.expanded>header button{background:color-mix(in srgb, var(--z-console-panel-raised) 58%, transparent)}}.z-document-assistant-icon-button,.z-document-assistant-dock.expanded>header button{color:var(--z-console-muted);cursor:pointer;font-size:18px;font-weight:760;line-height:1}.z-document-assistant-icon-button svg{width:15px;height:15px}.z-document-assistant-mark-actions{border-block-end:1px solid var(--z-console-border);flex-shrink:0;display:block}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-mark-actions{border-block-end:1px solid color-mix(in srgb, var(--z-console-border) 68%, transparent)}}.z-document-assistant-mark-actions{background:var(--z-desk-charcoal);padding:7px 8px;animation:.16s ease-out z-pdf-action-menu-in}.z-document-guard-mark-actions{flex:none;align-items:center;min-width:0;animation:.16s ease-out z-pdf-action-menu-in;display:inline-flex}.z-document-assistant-action-row{scrollbar-width:thin;white-space:nowrap;align-items:center;gap:6px;min-width:0;display:flex;overflow:auto hidden}.z-document-assistant-action-context{border:1px solid var(--z-console-border);flex:none;align-items:center;min-height:28px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-context{border:1px solid color-mix(in srgb, var(--z-console-border) 64%, transparent)}}.z-document-assistant-action-context{background:var(--z-console-black);border-radius:999px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-context{background:color-mix(in srgb, var(--z-console-black) 18%, transparent)}}.z-document-assistant-action-context{color:var(--z-console-muted);padding:0 9px;font-size:10px;font-weight:820}.z-document-assistant-action-row button{border:1px solid var(--z-console-border);flex:none;align-items:center;gap:6px;min-height:28px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-row button{border:1px solid color-mix(in srgb, var(--z-console-border) 72%, transparent)}}.z-document-assistant-action-row button{background:var(--z-console-panel-raised);border-radius:999px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-row button{background:color-mix(in srgb, var(--z-console-panel-raised) 58%, transparent)}}.z-document-assistant-action-row button{color:var(--z-console-text);cursor:pointer;padding:0 9px;font-size:11px;font-weight:790}.z-document-assistant-action-row button svg{flex:none;width:13px;height:13px}.z-document-assistant-action-row button.system{border-color:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-row button.system{border-color:color-mix(in srgb, var(--z-console-accent) 36%, var(--z-console-border))}}.z-document-assistant-action-row button.system{background:linear-gradient(180deg, var(--z-console-accent), var(--z-console-panel))}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-row button.system{background:linear-gradient(180deg, color-mix(in srgb, var(--z-console-accent) 12%, var(--z-console-panel-raised)), color-mix(in srgb, var(--z-console-panel) 80%, transparent))}}.z-document-assistant-action-row button.primary:not(.system){border-color:var(--z-console-border-strong)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-row button.primary:not(.system){border-color:color-mix(in srgb, var(--z-console-border-strong) 82%, transparent)}}.z-document-assistant-action-row button.primary:not(.system){background:var(--z-console-hover)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-row button.primary:not(.system){background:color-mix(in srgb, var(--z-console-hover) 72%, transparent)}}.z-document-assistant-action-row button.primary.scratch-note-action{border-color:var(--z-console-accent-border);background:var(--z-console-accent);min-height:32px;color:var(--z-console-accent-on);box-shadow:0 5px 16px var(--z-console-accent);padding:0 13px;font-size:12px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-row button.primary.scratch-note-action{box-shadow:0 5px 16px color-mix(in srgb, var(--z-console-accent) 18%, transparent)}}.z-document-assistant-action-row button.primary.scratch-note-action:hover{border-color:var(--z-console-accent-hover-border);background:var(--z-console-accent-hover);color:var(--z-console-accent-on)}.z-document-assistant-action-row button.secondary{color:var(--z-console-muted)}.z-document-assistant-action-row button:hover{border-color:var(--z-console-border-strong);background:var(--z-console-hover)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-action-row button:hover{background:color-mix(in srgb, var(--z-console-hover) 88%, transparent)}}.z-document-assistant-action-row button:hover{color:var(--z-console-text)}.z-document-assistant-citations{border-block-end:1px solid var(--z-console-border);flex-shrink:0;gap:7px;display:flex;overflow-x:auto}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-citations{border-block-end:1px solid color-mix(in srgb, var(--z-console-border) 68%, transparent)}}.z-document-assistant-citations{scrollbar-width:thin;padding:8px 10px}.z-document-assistant-citation{align-items:center;gap:6px;min-width:max-content;display:flex}.z-document-assistant-citation>span{color:var(--z-console-muted);white-space:nowrap;font-size:10px;font-weight:760}.z-document-assistant-citation>div{flex-wrap:nowrap;gap:5px;display:flex}.z-document-assistant-citation button{border:1px solid var(--z-console-border);min-height:24px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-citation button{border:1px solid color-mix(in srgb, var(--z-console-border) 72%, transparent)}}.z-document-assistant-citation button{background:var(--z-console-panel-raised);border-radius:999px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-citation button{background:color-mix(in srgb, var(--z-console-panel-raised) 62%, transparent)}}.z-document-assistant-citation button{color:var(--z-console-text);cursor:pointer;padding:0 8px;font-size:10px;font-weight:760}.z-document-assistant-status{border-block-end:1px solid var(--z-console-border);flex-shrink:0;align-items:center;gap:8px;margin:0;display:flex}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-status{border-block-end:1px solid color-mix(in srgb, var(--z-console-border) 68%, transparent)}}.z-document-assistant-status{background:var(--z-console-panel-raised)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-status{background:color-mix(in srgb, var(--z-console-panel-raised) 60%, var(--z-console-panel))}}.z-document-assistant-status{color:var(--z-console-text);padding:8px 10px;font-size:11px;font-weight:760;line-height:1.3}.z-document-assistant-status span{color:var(--z-console-muted);text-transform:uppercase;flex:none;font-size:10px;font-weight:840}.z-document-assistant-status span.z-document-assistant-status-tick{text-transform:none;border-radius:50%;justify-content:center;align-items:center;width:20px;height:20px;display:inline-flex}.z-document-assistant-status-tick svg{width:13px;height:13px}.z-document-assistant-status-tick.single,.z-document-assistant-status-tick.double{background:var(--z-console-sage-wash);color:var(--z-console-sage)}.z-document-assistant-status-tick.double{background:var(--z-console-accent)}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-status-tick.double{background:color-mix(in srgb, var(--z-console-accent) 16%, transparent)}}.z-document-assistant-status-tick.double{color:var(--z-console-accent)}.z-document-assistant-status-tick.warning{background:var(--z-console-gold-wash);color:var(--z-console-gold)}.z-document-assistant-status-tick.invalid{background:var(--z-console-danger-soft);color:var(--z-console-danger)}.z-document-assistant-status-tick.pending,.z-document-assistant-status-tick.captured{background:var(--z-console-neutral-wash);color:var(--z-console-muted)}.z-document-assistant-status-tick.pending svg{animation:1.6s linear infinite z-pdf-sticky-tick-spin}.z-document-assistant-chat-wrap{flex-direction:column;flex:auto;min-height:0;display:flex;overflow:hidden}.z-document-assistant-chat-wrap .z-chat-v2-page.dock,.z-document-assistant-chat-wrap .z-chat-v2.dock{flex:auto;height:auto;min-height:0;max-height:none;background:0 0!important}.z-document-assistant-chat-wrap .z-chat-v2-page.dock{flex-direction:column;display:flex;overflow:hidden}.z-document-assistant-chat-wrap .z-chat-v2.dock{flex-direction:column;display:flex;background:0 0!important}.z-document-assistant-chat-wrap .z-chat-v2-page.dock>.z-chat-v2-body-status{max-width:calc(100% - 20px);color:var(--z-console-muted);margin:7px 10px 0;font-size:11px}.z-document-assistant-chat-wrap .z-chat-v2.dock>.z-chat-thread{overscroll-behavior:contain;flex:auto;gap:10px;min-height:0;padding:10px;padding-block-start:8px;overflow-y:auto;background:0 0!important}.z-document-assistant-chat-wrap .z-chat-v2.dock>.z-chat-thread:not(:has(.z-chat-message)){display:none}.z-document-assistant-chat-wrap .z-chat-v2.dock>.z-chat-composer-wrap{flex-shrink:0}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message{width:100%}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant .z-chat-bubble,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant.pending .z-chat-bubble{border:1px solid var(--z-console-border);max-width:100%}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant .z-chat-bubble,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant.pending .z-chat-bubble{border:1px solid color-mix(in srgb, var(--z-console-border) 68%, transparent)}}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant .z-chat-bubble,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant.pending .z-chat-bubble{background:var(--z-console-panel-raised);border-radius:14px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant .z-chat-bubble,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant.pending .z-chat-bubble{background:color-mix(in srgb, var(--z-console-panel-raised) 62%, transparent)}}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant .z-chat-bubble,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.assistant.pending .z-chat-bubble{box-shadow:none;padding:10px 12px}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.user .z-chat-bubble{border:1px solid var(--z-console-accent);max-width:72%}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.user .z-chat-bubble{border:1px solid color-mix(in srgb, var(--z-console-accent) 44%, var(--z-console-border))}}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.user .z-chat-bubble{background:var(--z-console-accent);border-radius:14px}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.user .z-chat-bubble{background:color-mix(in srgb, var(--z-console-accent) 18%, var(--z-console-panel-raised))}}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-message.user .z-chat-bubble{box-shadow:none;padding:8px 11px}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-bubble p,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response p,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response li,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response strong,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response em,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-markdown-response span{color:var(--z-console-text);font-size:13px;line-height:1.48}.z-document-assistant-chat-wrap .z-chat-v2.dock>.z-chat-composer-wrap{width:100%;margin:0;padding:8px 10px 10px;background:0 0!important}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-composer.z-chat-v2-composer{border:1px solid var(--z-console-border);grid-template-rows:auto;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;min-height:52px;display:grid}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-composer.z-chat-v2-composer{border:1px solid color-mix(in srgb, var(--z-console-border) 70%, transparent)}}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-composer.z-chat-v2-composer{border-radius:16px;background:var(--z-console-input)!important}@supports (color:color-mix(in lab, red, red)){.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-composer.z-chat-v2-composer{background:color-mix(in srgb, var(--z-console-input) 78%, transparent)!important}}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-composer.z-chat-v2-composer{box-shadow:none;padding:8px}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-input{resize:none;grid-column:1;min-height:28px;max-height:82px;font-size:14px;line-height:1.45;color:var(--z-console-text)!important}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-footer{grid-column:2;justify-content:flex-end;min-height:0}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-footer-start,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-composer-head{display:none}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-actions{gap:6px}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-send,.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-cancel{border-radius:12px;width:34px;min-width:34px;height:34px;min-height:34px}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-cancel{place-items:center;padding:0;display:inline-grid}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-cancel span{clip:rect(0, 0, 0, 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.z-document-assistant-chat-wrap .z-chat-v2.dock .z-chat-v2-cancel svg{width:14px;height:14px}@media (max-width:760px){.z-chat-main.document-reader-active:has(.z-document-assistant-dock.expanded) .z-pdf-toolbar-left{padding-inline-start:0}.z-document-assistant-dock.minimized,.z-document-assistant-dock.compact,.z-chat-main.document-reader-active .z-document-assistant-dock.minimized,.z-chat-main.document-reader-active .z-document-assistant-dock.compact{pointer-events:none!important;display:none!important}.z-document-assistant-dock.expanded,.z-chat-main.document-reader-active .z-document-assistant-dock.expanded{width:auto;max-height:calc(100dvh - 24px);position:fixed;inset-block:auto 12px;inset-inline:12px;display:flex!important}}:root{--z-console-warn:#d4a854;--z-console-warn-soft:#d4a85424;--z-console-warn-border:#d4a85457;--z-console-danger:#c99090;--z-console-danger-soft:#c9909024;--z-console-danger-border:#c9909057}.z-billing-checkout-overlay,.z-contact-sales-overlay{background:#080604bd}.z-billing-note,.z-billing-form{border-color:var(--z-console-border);background:var(--z-desk-paper);color:var(--z-desk-ink-text)}.z-console-sidebar{--z-console-sidebar-font:var(--z-font-console), "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;--z-console-text:#ecebea;--z-console-muted:#9f9d9a;--z-console-faint:#777572}.z-console-sidebar,.z-console-sidebar *,.z-console-sidebar button,.z-console-sidebar a,.z-console-sidebar input{font-family:var(--z-console-sidebar-font)!important}.z-console-muted{color:#777572;font-size:12px;font-weight:400}.z-console-see-more{color:#ecebea;min-height:31px;font-size:14px;font-weight:500}.z-public{background:radial-gradient(circle, #eee8dc0b 1px, transparent 1.4px) 0 0 / 26px 26px, var(--z-desk-night);color:var(--z-desk-text)}.z-public .z-public-header{border:0;border-bottom:1px solid var(--z-desk-border);background:var(--z-desk-night);border-radius:0;width:100%;min-height:64px;margin:0;top:0}@supports (color:color-mix(in lab, red, red)){.z-public .z-public-header{background:color-mix(in srgb, var(--z-desk-night) 94%, transparent)}}.z-public .z-public-header{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;padding:0 clamp(18px,5vw,72px)}.z-public .z-public-brand{color:var(--z-desk-text);font-family:var(--z-font-display);letter-spacing:-.01em;font-size:19px;font-weight:500}.z-public .z-public-brand:before{display:none}.z-public .z-public-header nav>a,.z-public .z-public-header .z-language-switch,.z-public .z-public-session-actions>a{min-height:36px;color:var(--z-desk-muted);font-family:var(--z-font-sans);letter-spacing:0;text-transform:none;border-radius:8px;padding:0 12px;font-size:14px;font-weight:500}.z-public .z-public-header nav>a:hover,.z-public .z-public-header .z-language-switch:hover,.z-public .z-public-session-actions>a:hover{background:var(--z-desk-hover);color:var(--z-desk-text)}.z-public .z-public-session-actions>a:last-child{box-shadow:none;font-weight:600;border:1px solid var(--z-desk-gold)!important;background:var(--z-desk-gold)!important;color:var(--z-desk-gold-on)!important}.z-public .z-public-session-actions>a:last-child:hover{background:var(--z-desk-gold-hover)!important}.z-public .z-public-session-actions>a:last-child:after{content:none}.z-public .z-eyebrow,.z-public .z-public-eyebrow{color:var(--z-desk-gold-soft);font-family:var(--z-font-sans);letter-spacing:0;text-transform:none;font-size:13px;font-weight:500}.z-public .z-public-eyebrow:before{background:var(--z-desk-gold)}.z-public .z-pricing-hero h1{max-width:16ch;color:var(--z-desk-text);font-family:var(--z-font-display);letter-spacing:-.02em;font-size:clamp(40px,5.4vw,68px);font-weight:420;line-height:1.02}[dir=rtl] .z-public .z-pricing-hero h1,.z-public[dir=rtl] .z-pricing-hero h1{letter-spacing:0;line-height:1.25}.z-public .z-pricing-hero>p:last-child{max-width:62ch;color:var(--z-desk-muted);font-size:16px;line-height:1.7}.z-public .z-pricing-currency-switch{width:auto;max-width:1400px;color:var(--z-desk-muted);margin:0 clamp(20px,7vw,104px) 16px;font-weight:500}.z-public .z-pricing-currency-switch>div{border-color:var(--z-desk-border-strong);background:0 0}.z-public .z-pricing-currency-switch button{color:var(--z-desk-muted);font-weight:600}.z-public .z-pricing-currency-switch button[aria-pressed=true]{background:var(--z-desk-text);color:var(--z-desk-ink)}.z-public .z-pricing-term-switch{border:1px solid var(--z-desk-border-strong);border-radius:999px;gap:3px;margin:0 0 14px;padding:3px;display:inline-flex}.z-public .z-pricing-term-switch button{min-height:30px;color:var(--z-desk-muted);cursor:pointer;font:inherit;background:0 0;border:0;border-radius:999px;padding:0 14px;font-size:13px;font-weight:600}.z-public .z-pricing-term-switch button[aria-pressed=true]{background:var(--z-desk-text);color:var(--z-desk-ink)}.z-public .z-pricing-grid{border:1px solid var(--z-desk-border-strong);border-radius:14px;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;max-width:1400px;margin:0 clamp(20px,7vw,104px) clamp(56px,8vw,96px);padding:0;overflow:hidden}.z-public .z-pricing-card,.z-public .z-pricing-card:hover{border:0;border-inline-start:1px solid var(--z-desk-border);min-height:0;box-shadow:none;background:0 0;border-radius:0;gap:16px;padding:28px 22px 24px;transform:none}.z-public .z-pricing-card:first-child{border-inline-start:0}.z-public .z-pricing-card-active,.z-public .z-pricing-card-active:hover{background:var(--z-desk-charcoal)}@supports (color:color-mix(in lab, red, red)){.z-public .z-pricing-card-active,.z-public .z-pricing-card-active:hover{background:color-mix(in srgb, var(--z-desk-charcoal) 70%, transparent)}}.z-public .z-pricing-card-active,.z-public .z-pricing-card-active:hover{box-shadow:inset 0 2px 0 var(--z-desk-gold)}.z-public .z-pricing-card h2{color:var(--z-desk-text);font-family:var(--z-font-display);font-size:22px;font-weight:480}.z-public .z-pricing-price{color:var(--z-desk-text);font-family:var(--z-font-display);letter-spacing:-.01em;margin-top:12px;font-size:30px;font-weight:420}.z-public .z-pricing-price-note{color:var(--z-desk-faint);margin:-6px 0 12px;font-size:12.5px;font-weight:500}.z-public .z-pricing-copy{color:var(--z-desk-muted);font-size:14px;line-height:1.65}.z-public .z-pricing-card li{border-top-color:var(--z-desk-border);color:var(--z-desk-muted);font-size:13.5px}.z-public .z-pricing-card .z-button-secondary{border:1px solid var(--z-desk-border-strong);color:var(--z-desk-text);background:0 0;border-radius:8px;font-weight:600}.z-public .z-pricing-card .z-button-secondary:hover{border-color:var(--z-desk-gold-border);background:var(--z-desk-gold-wash)}.z-public .z-pricing-card .z-button-primary{box-shadow:none;border-radius:8px;font-weight:600;border-color:var(--z-desk-gold)!important;background:var(--z-desk-gold)!important;color:var(--z-desk-gold-on)!important}.z-public .z-pricing-card .z-button-primary:after{content:none}.z-public .z-pricing-card .z-contact-sales>.z-button-primary{border-color:var(--z-desk-border-strong)!important;color:var(--z-desk-text)!important;background:0 0!important}.z-public .z-pricing-card .z-contact-sales>.z-button-primary:hover{border-color:var(--z-desk-gold-border)!important;background:var(--z-desk-gold-wash)!important}@media (max-width:1180px){.z-public .z-pricing-grid{grid-template-columns:minmax(0,1fr)}.z-public .z-pricing-card{border-top:1px solid var(--z-desk-border);border-inline-start:0}}@media (max-width:680px){.z-public .z-pricing-grid{grid-template-columns:minmax(0,1fr)}.z-public .z-pricing-card{border-inline-start:0}}.z-public .z-legal h1{color:var(--z-desk-text);font-family:var(--z-font-display);letter-spacing:-.02em;font-weight:420}[dir=rtl] .z-public .z-legal h1,.z-public[dir=rtl] .z-legal h1{letter-spacing:0;line-height:1.25}.z-public .z-legal header p{color:var(--z-desk-muted)}.z-public .z-legal header span{border-color:var(--z-desk-border-strong);color:var(--z-desk-muted);background:0 0;font-weight:600}.z-public .z-legal section{border-color:var(--z-desk-paper-edge);background:var(--z-desk-paper);box-shadow:none}.z-public .z-legal h2{color:var(--z-desk-ink-text);font-family:var(--z-font-display);font-weight:480}.z-public .z-legal section p{color:var(--z-desk-ink-text)}.z-public .z-not-found{color:var(--z-desk-text);background:0 0}.z-public .z-not-found h1{color:var(--z-desk-text);font-family:var(--z-font-display);font-weight:420}[dir=rtl] .z-public .z-not-found h1,.z-public[dir=rtl] .z-not-found h1{letter-spacing:0;line-height:1.25}.z-public .z-not-found>p:not(.z-public-eyebrow){color:var(--z-desk-muted)}.z-auth-page .z-site-header{border:0;border-bottom:1px solid var(--z-desk-border);background:var(--z-desk-night);border-radius:0;width:100%;min-height:64px;margin:0;top:0}@supports (color:color-mix(in lab, red, red)){.z-auth-page .z-site-header{background:color-mix(in srgb, var(--z-desk-night) 94%, transparent)}}.z-auth-page .z-site-header{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;padding:0 clamp(18px,5vw,72px)}.z-auth-page .z-site-brand{color:var(--z-desk-text);font-family:var(--z-font-display);letter-spacing:-.01em;font-size:19px;font-weight:500}.z-auth-page .z-site-brand:before{display:none}.z-auth-page .z-site-header nav>a,.z-auth-page .z-site-header .z-language-switch{color:var(--z-desk-muted);font-family:var(--z-font-sans);letter-spacing:0;text-transform:none;border-color:#0000;border-radius:8px;font-size:14px;font-weight:500}.z-auth-page .z-site-header nav>a:hover,.z-auth-page .z-site-header .z-language-switch:hover{background:var(--z-desk-hover);color:var(--z-desk-text)}main.z-auth-page{background:linear-gradient(90deg, #13100cd1, #13100c59 55%, #13100cb3), radial-gradient(ellipse at 30% 55%, #13100cbf, transparent 60%), url(/practice/pro-chalkboard.jpg) center / cover no-repeat fixed, var(--z-desk-night)}.z-chat-main.document-reader-active .z-pdf-toolbar{border-bottom:1px solid var(--z-desk-border);background:var(--z-desk-charcoal);min-height:52px;color:var(--z-desk-text);grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:12px;padding:0 16px;display:grid}.z-chat-main.document-reader-active .z-pdf-toolbar-left{grid-column:1;justify-content:flex-start;min-width:0}.z-chat-main.document-reader-active .z-pdf-toolbar-center{grid-column:2;align-self:stretch;width:auto;max-width:min(640px,44vw);position:static;transform:none}.z-chat-main.document-reader-active .z-pdf-toolbar-right{grid-column:3;justify-content:flex-end;min-width:0}.z-chat-main.document-reader-active:not(.document-cinema-active){--z-document-assistant-toolbar-inset:64px}.z-chat-main.document-reader-active:has(.z-document-assistant-dock.expanded) .z-pdf-toolbar-left{min-width:0}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-note-tabs{align-self:stretch}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-note-tabs>button,.z-pdf-note-tabs-bar .z-pdf-note-tabs>button{min-height:51px;color:var(--z-desk-muted);font:600 12.5px/1 var(--z-font-sans), sans-serif}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-note-tabs>button small,.z-pdf-note-tabs-bar .z-pdf-note-tabs>button small{color:var(--z-desk-faint);font:600 10.5px/1 var(--z-font-sans), sans-serif;letter-spacing:0;text-transform:none}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-note-tabs>button:hover,.z-pdf-note-tabs-bar .z-pdf-note-tabs>button:hover{color:var(--z-desk-text)}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-note-tabs>button.active,.z-pdf-note-tabs-bar .z-pdf-note-tabs>button.active{color:var(--z-desk-text);box-shadow:inset 0 -2px 0 var(--z-desk-gold)}.z-pdf-note-tabs-bar{border-bottom-color:var(--z-desk-border);background:var(--z-desk-charcoal);color:var(--z-desk-text)}.z-pdf-note-tabs-bar .z-pdf-note-tabs>button{min-height:42px}.z-chat-main.document-reader-active .z-pdf-toolbar .z-zoom-group{color:var(--z-desk-muted);background:0 0;border:0;gap:2px}.z-chat-main.document-reader-active .z-pdf-toolbar .z-zoom-group button{width:28px;height:28px;color:var(--z-desk-muted);background:0 0;border:0;border-radius:8px}.z-chat-main.document-reader-active .z-pdf-toolbar .z-zoom-group button:hover{background:var(--z-desk-hover);color:var(--z-desk-text)}.z-chat-main.document-reader-active .z-pdf-toolbar .z-zoom-val{min-width:42px;color:var(--z-desk-muted);font:600 12px/1 var(--z-font-sans), sans-serif;font-variant-numeric:tabular-nums;text-align:center}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-toolbar-action{min-height:30px;color:var(--z-desk-muted);background:0 0;border:0;border-radius:8px;padding:0 8px}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-toolbar-action:hover:not(:disabled){background:var(--z-desk-hover);color:var(--z-desk-text)}.z-chat-main.document-reader-active .z-pdf-toolbar .z-pdf-toolbar-action.active{color:var(--z-desk-muted)}.z-chat-main.document-reader-active .z-pdf-toolbar-right>*+*{border-inline-start:1px solid var(--z-desk-border);padding-inline-start:8px}.z-pdf-ink-tools{align-items:center;gap:10px;min-width:0;display:flex}.z-pdf-ink-tool-group{align-items:center;gap:2px;display:inline-flex}.z-pdf-ink-tool-group button{width:32px;height:32px;color:var(--z-desk-muted);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:9px;place-items:center;padding:0;transition:background .12s,color .12s,border-color .12s;display:inline-grid}.z-pdf-ink-tool-group button svg{width:18px;height:18px}.z-pdf-ink-tool-group button:hover:not(:disabled){background:var(--z-desk-hover);color:var(--z-desk-text)}.z-pdf-ink-tool-group button.active{border-color:var(--z-desk-gold-border);background:var(--z-desk-gold-wash);color:var(--z-desk-gold-soft)}.z-pdf-ink-tool-group button:disabled{cursor:default;opacity:.35}:is(.z-pdf-ink-tool-group button:focus-visible,.z-pdf-ink-palette button:focus-visible){outline:2px solid var(--z-desk-gold);outline-offset:2px}[dir=rtl] .z-pdf-ink-undo-icon{transform:scaleX(-1)}.z-pdf-ink-palette{border:1px solid var(--z-desk-paper-edge);background:var(--z-desk-paper);border-radius:999px;align-items:center;gap:8px;min-height:32px;padding:0 10px;display:inline-flex}.z-pdf-ink-swatches,.z-pdf-ink-widths{align-items:center;gap:4px;display:inline-flex}.z-pdf-ink-palette-rule{background:var(--z-desk-paper-edge);width:1px;height:16px}.z-pdf-ink-swatch,.z-pdf-ink-width{cursor:pointer;background:0 0;border:0;border-radius:999px;place-items:center;width:22px;height:22px;padding:0;display:inline-grid}.z-pdf-ink-swatch span{background:currentColor;border-radius:999px;width:14px;height:14px;transition:transform .12s,box-shadow .12s}.z-pdf-ink-swatch:hover span{transform:scale(1.12)}.z-pdf-ink-swatch.active span{box-shadow:0 0 0 2px var(--z-desk-paper), 0 0 0 3.5px var(--z-desk-gold-deep)}.z-pdf-ink-width span{opacity:.55;background:currentColor;border-radius:999px;width:14px;min-height:2px}.z-pdf-ink-width:hover span,.z-pdf-ink-width.active span{opacity:1}.z-pdf-ink-width.active{background:var(--z-desk-gold-wash)}.z-chat-main.document-reader-active .z-pdf-page-stack{gap:28px;padding-block:28px 8px}.z-chat-main.document-reader-active .z-pdf-page-frame canvas,.z-chat-main.document-reader-active .z-pdf-page-scroll canvas{box-shadow:0 0 0 1px var(--z-desk-paper-edge), var(--z-desk-shadow);border-radius:2px}.z-pdf-page-frame .z-pdf-highlight-layer,.z-pdf-page-frame .z-pdf-draw-layer{border-radius:2px}.z-pdf-ink-layer{z-index:3;pointer-events:none;position:absolute;inset:0;overflow:visible}.z-pdf-ink-layer path{fill:none;stroke-linecap:round;stroke-linejoin:round}.z-pdf-draw-layer.mode-mark.tool-eraser{cursor:cell}.z-pdf-draw-layer>svg polyline.active{stroke-linecap:round;stroke-linejoin:round}.z-pdf-draw-layer>svg .z-pdf-eraser-cursor{fill:var(--z-desk-gold-wash);stroke:var(--z-desk-gold-deep);stroke-dasharray:3 3;stroke-width:1.2px}.z-pdf-draw-layer>svg rect.mark-stroke,.z-pdf-draw-layer>svg polygon.mark-stroke,.z-pdf-draw-layer>svg polyline.mark-stroke,.z-pdf-draw-layer>svg polyline.mark-stroke:not(.circle):not(.text-backed),.z-pdf-draw-layer>svg polyline.mark-stroke.saved_note{stroke:var(--z-mark-ink,var(--z-desk-gold));stroke-linecap:round;stroke-width:2.6px}.z-pdf-draw-layer>svg rect.mark-stroke.active-mark,.z-pdf-draw-layer>svg polygon.mark-stroke.active-mark,.z-pdf-draw-layer>svg polyline.mark-stroke.active-mark{stroke:var(--z-mark-ink,var(--z-desk-gold));stroke-width:3.6px;filter:drop-shadow(0 0 3px var(--z-desk-gold-border))}.z-pdf-mark-remove{border:1px solid var(--z-desk-paper-edge);background:var(--z-desk-ink);width:24px;height:24px;color:var(--z-desk-text);box-shadow:var(--z-desk-shadow);opacity:0;visibility:hidden;z-index:5;transition:opacity .14s .38s,transform .14s .38s,visibility 0s linear .52s;transform:translate(-50%,-50%)scale(.86)}:is(.z-pdf-mark-remove.active,.z-pdf-mark-remove:focus-visible){opacity:1;visibility:visible;transition-delay:0s;transform:translate(-50%,-50%)}@media (hover:hover) and (pointer:fine){.z-pdf-mark-target:hover+.z-pdf-mark-remove,.z-pdf-mark-remove:hover{opacity:1;visibility:visible;transition-delay:0s;transform:translate(-50%,-50%)}}:is(.z-pdf-mark-remove:hover,.z-pdf-mark-remove:focus-visible){border-color:var(--z-desk-gold);background:var(--z-desk-ink);color:var(--z-desk-gold-soft)}.z-pdf-mark-remove:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:2px}.z-pdf-clear-drawing{border:1px solid var(--z-desk-paper-edge);background:var(--z-desk-paper);width:30px;height:30px;color:var(--z-desk-ink-text);box-shadow:none;opacity:0;border-radius:999px;transition:opacity .14s}.z-pdf-page-frame:hover .z-pdf-clear-drawing{opacity:.85}.z-pdf-clear-drawing:focus-visible{opacity:.85}.z-pdf-clear-drawing:hover{border-color:var(--z-desk-gold-deep);background:var(--z-desk-paper);opacity:1}.z-chat-main.document-reader-active .z-pdf-workbench{grid-template-columns:minmax(0,1fr) 156px}.z-chat-main.document-reader-active .z-pdf-workbench .z-pdf-thumbs{gap:16px;width:156px;min-width:156px;padding:16px 18px 24px;background:var(--z-desk-charcoal)!important}.z-chat-main.document-reader-active .z-pdf-thumbs .z-document-rail-tab strong{font-family:var(--z-font-display), Georgia, serif;font-size:13.5px;font-weight:500}.z-chat-main.document-reader-active .z-pdf-thumb-preview{box-shadow:0 0 0 1px var(--z-desk-paper-edge), 0 8px 18px var(--z-desk-night);border-radius:1px}.z-chat-main.document-reader-active .z-pdf-thumb-info strong{font:600 11px/1 var(--z-font-sans), sans-serif;letter-spacing:0;text-transform:none}.z-tutor-tile{z-index:130;pointer-events:none;flex-direction:column-reverse;align-items:flex-start;gap:10px;display:flex;position:absolute;inset-block-start:70px;inset-inline-start:22px}.z-tutor-tile>*{pointer-events:auto}.z-tutor-tile-card{border:1px solid var(--z-desk-border-strong);background:var(--z-desk-ink);width:128px;color:var(--z-desk-text);text-align:center;box-shadow:var(--z-desk-shadow);cursor:pointer;border-radius:20px;justify-items:center;gap:6px;padding:12px 10px 14px;transition:border-color .16s,transform .16s,box-shadow .16s;display:grid}.z-tutor-tile-card:hover{border-color:var(--z-desk-gold-border);transform:translateY(-1px)}.z-tutor-tile.open .z-tutor-tile-card{border-color:var(--z-desk-gold);box-shadow:0 0 0 3px var(--z-desk-gold-wash), var(--z-desk-shadow)}.z-tutor-tile-card:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:3px}.z-tutor-tile-avatar{place-items:center;line-height:0;display:grid}.z-tutor-tile .z-document-assistant-logo{mix-blend-mode:normal;width:auto;height:auto}.z-tutor-tile-copy{gap:4px;display:grid}.z-tutor-tile-copy strong{font-family:var(--z-font-display), Georgia, serif;letter-spacing:-.01em;font-size:17px;font-weight:500;line-height:1}.z-tutor-tile-copy small{color:var(--z-desk-muted);font:500 11px/1.35 var(--z-font-sans), sans-serif}[dir=rtl] .z-tutor-tile-copy strong{font-family:var(--z-font-sans), sans-serif;font-weight:650}.z-tutor-menu{border:1px solid var(--z-desk-border-strong);background:var(--z-desk-charcoal);width:min(312px,100vw - 32px);color:var(--z-desk-text);box-shadow:var(--z-desk-shadow);border-radius:18px;gap:12px;padding:14px;animation:.16s ease-out z-tutor-menu-in;display:grid}@keyframes z-tutor-menu-in{0%{opacity:0;transform:translateY(-4px)}}.z-tutor-menu header{justify-content:space-between;align-items:center;display:flex}.z-tutor-menu header strong{font-family:var(--z-font-display), Georgia, serif;font-size:16px;font-weight:500}[dir=rtl] .z-tutor-menu header strong{font-family:var(--z-font-sans), sans-serif;font-weight:650}.z-tutor-menu-close{width:26px;height:26px;color:var(--z-desk-muted);cursor:pointer;background:0 0;border:0;border-radius:8px;place-items:center;font-size:18px;display:inline-grid}.z-tutor-menu-close:hover{background:var(--z-desk-hover);color:var(--z-desk-text)}.z-tutor-menu-intro{color:var(--z-desk-muted);margin:0;font-size:13px;line-height:1.5}.z-tutor-menu-mark{border-block-end:1px solid var(--z-desk-border);gap:8px;padding-block-end:12px;display:grid}.z-tutor-menu-mark p{color:var(--z-desk-text);justify-content:space-between;align-items:baseline;gap:8px;margin:0 0 2px;font-size:13px;font-weight:600;display:flex}.z-tutor-menu-mark small{color:var(--z-desk-faint);font-size:11px;font-weight:600}.z-tutor-menu-mark button{border:1px solid var(--z-desk-border-strong);min-height:40px;color:var(--z-desk-text);font:650 13.5px/1 var(--z-font-sans), sans-serif;cursor:pointer;background:0 0;border-radius:12px;justify-content:center;align-items:center;gap:8px;transition:background .12s,border-color .12s;display:inline-flex}.z-tutor-menu-mark button svg{width:16px;height:16px}.z-tutor-menu-mark button.primary{border-color:var(--z-desk-gold);background:var(--z-desk-gold);color:var(--z-desk-gold-on)}.z-tutor-menu-mark button.primary:hover{background:var(--z-desk-gold-hover)}.z-tutor-menu-mark button.secondary:hover{border-color:var(--z-desk-gold-border);background:var(--z-desk-hover)}.z-tutor-menu-ask{border:1px solid var(--z-desk-border-strong);background:var(--z-desk-input);border-radius:12px;align-items:center;gap:6px;padding:4px 4px 4px 12px;display:flex}[dir=rtl] .z-tutor-menu-ask{padding:4px 12px 4px 4px}.z-tutor-menu-ask:focus-within{border-color:var(--z-desk-gold-border)}.z-tutor-menu-ask input{min-width:0;color:var(--z-desk-text);font:500 13.5px/1.3 var(--z-font-sans), sans-serif;background:0 0;border:0;outline:none;flex:auto}.z-tutor-menu-ask input::placeholder{color:var(--z-desk-faint)}.z-tutor-menu-ask button{background:var(--z-desk-gold);width:32px;height:32px;color:var(--z-desk-gold-on);cursor:pointer;border:0;border-radius:9px;flex:none;place-items:center;display:inline-grid}.z-tutor-menu-ask button:disabled{background:var(--z-desk-hover);color:var(--z-desk-faint);cursor:default}.z-tutor-menu-ask button svg{width:16px;height:16px}[dir=rtl] .z-tutor-menu-ask button svg{transform:scaleX(-1)}.z-tutor-menu-open{color:var(--z-desk-muted);font:600 12px/1.2 var(--z-font-sans), sans-serif;cursor:pointer;background:0 0;border:0;justify-self:start;padding:0}.z-tutor-menu-open:hover{color:var(--z-desk-gold-soft)}.z-chat-main.document-reader-active:has(.z-pdf-sticky-focus-overlay) .z-tutor-tile{display:none}.z-document-empty-card{border-color:var(--z-desk-paper-edge);border-radius:6px}.z-document-empty-card p{color:var(--z-console-focus-muted)}.z-document-empty-status{border:0;border-block:1px solid var(--z-desk-paper-edge);width:100%;color:var(--z-desk-ink-text);background:0 0;border-radius:0;padding:10px 0}.z-document-empty-status span{color:var(--z-console-focus-muted);font:600 11px/1 var(--z-font-sans), sans-serif;letter-spacing:0;text-transform:none}@media (max-width:1024px){.z-tutor-tile,.z-tutor-tile.compact{flex-direction:column;inset-block-start:auto;inset-block-end:calc(16px + env(safe-area-inset-bottom,0px));inset-inline-start:16px}.z-tutor-tile.compact .z-tutor-tile-card{border-radius:999px;align-items:center;gap:8px;width:auto;padding:6px 16px 6px 6px;display:inline-flex}[dir=rtl] .z-tutor-tile.compact .z-tutor-tile-card{padding:6px 6px 6px 16px}.z-chat-main.document-reader-active .z-pdf-toolbar{grid-template-columns:minmax(0,1fr)}.z-chat-main.document-reader-active .z-pdf-toolbar-center,.z-chat-main.document-reader-active .z-pdf-toolbar-right,.z-chat-main.document-reader-active .z-pdf-toolbar-left{grid-column:1}}.zs-overlay{z-index:60;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#080604b8;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.zs-sheet{--zs-ink:var(--z-desk-ink-text);--zs-quiet:#5f584c;--zs-faint:#8a8172;--zs-rule:#17150f1a;--zs-rule-strong:#17150f33;border:1px solid var(--z-desk-border);background:var(--z-desk-night);width:min(860px,100%);height:min(680px,100vh - 48px);color:var(--z-desk-text);font-family:var(--z-font-sans,inherit);border-radius:14px;grid-template-columns:208px minmax(0,1fr);display:grid;overflow:hidden;box-shadow:0 30px 80px #00000080}.zs-nav{flex-direction:column;gap:2px;min-height:0;padding:22px 12px;display:flex;overflow-y:auto}.zs-nav-title{color:var(--z-desk-faint);margin:0 10px 14px;font-size:12px;font-weight:600}.zs-nav-row{min-height:36px;color:var(--z-desk-muted);font:inherit;text-align:start;cursor:pointer;background:0 0;border:0;border-radius:7px;align-items:center;gap:10px;padding:0 10px;font-size:14px;font-weight:500;transition:background .12s,color .12s;display:flex;position:relative}.zs-nav-row svg{opacity:.7;flex:0 0 16px;width:16px;height:16px}.zs-nav-row:hover{background:var(--z-desk-hover);color:var(--z-desk-text)}.zs-nav-row.active{color:var(--z-desk-text);background:#eee8dc14}.zs-nav-row.active:before{background:var(--z-desk-gold);content:"";border-radius:2px;width:2px;position:absolute;inset-block:9px;inset-inline-start:0}.zs-nav-row.active svg{color:var(--z-desk-gold-soft);opacity:1}:is(.zs-nav-row:focus-visible,.zs-close:focus-visible,.zs-btn:focus-visible){outline:2px solid var(--z-desk-gold);outline-offset:2px}.zs-main{background:var(--z-desk-paper);min-height:0;color:var(--zs-ink);flex-direction:column;display:flex}.zs-head{border-bottom:1px solid var(--zs-rule);justify-content:space-between;align-items:center;gap:16px;padding:22px 32px 18px;display:flex}.zs-head h2{color:var(--zs-ink);font-family:var(--z-font-display);letter-spacing:-.02em;margin:0;font-size:26px;font-weight:500;line-height:1.15}.zs-close{width:32px;height:32px;color:var(--zs-quiet);cursor:pointer;background:0 0;border:0;border-radius:999px;flex:0 0 32px;place-items:center;display:inline-grid}.zs-close svg{width:18px;height:18px}.zs-close:hover{color:var(--zs-ink);background:#17150f12}.zs-body{scrollbar-color:#17150f33 transparent;scrollbar-width:thin;flex:1;min-height:0;padding:4px 32px 28px;overflow-y:auto}.zs-section{border-bottom:1px solid var(--zs-rule);gap:10px;padding:22px 0;display:grid}.zs-section:last-child{border-bottom:0}.zs-section h3{color:var(--zs-ink);align-items:center;gap:8px;margin:0;font-size:15px;font-weight:650;line-height:1.3;display:flex}.zs-section>p,.zs-note{max-width:72ch;color:var(--zs-quiet);margin:0;font-size:13.5px;line-height:1.6}.zs-section-head,.zs-section-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 16px;display:flex}.zs-section-danger h3{color:var(--z-desk-rust-ink)}.zs-badge{border:1px solid var(--zs-rule-strong);color:var(--zs-quiet);border-radius:999px;align-items:center;padding:1px 9px;font-size:11.5px;font-style:normal;font-weight:600;line-height:1.6;display:inline-flex}.zs-account{gap:2px;display:grid}.zs-account strong{font-size:15px;font-weight:600}.zs-account span{color:var(--zs-quiet);overflow-wrap:anywhere;font-size:13.5px}.zs-rows{margin:2px 0 0;display:grid}.zs-rows>div{border-top:1px solid var(--zs-rule);grid-template-columns:minmax(110px,160px) minmax(0,1fr);gap:12px;padding:10px 0;display:grid}.zs-rows dt{color:var(--zs-quiet);font-size:13px}.zs-rows dd{color:var(--zs-ink);margin:0;font-size:14px;font-weight:550;line-height:1.5}.zs-list{border:1px solid var(--zs-rule);background:#fffdf880;border-radius:10px;display:grid;overflow:hidden}.zs-list-row{border-top:1px solid var(--zs-rule);justify-content:space-between;align-items:center;gap:12px;min-height:48px;padding:8px 14px;display:flex}.zs-list-row:first-child{border-top:0}.zs-list-row strong{min-width:0;color:var(--zs-ink);text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:550;overflow:hidden}.zs-current{color:var(--zs-quiet);flex:none;align-items:center;gap:7px;font-size:12.5px;font-weight:600;display:inline-flex}.zs-current:before{background:var(--z-desk-gold);content:"";border-radius:999px;width:6px;height:6px}.zs-empty{border:1px dashed var(--zs-rule-strong);color:var(--zs-faint);text-align:center;border-radius:10px;margin:0;padding:14px;font-size:13px}.zs-meters{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px 24px;display:grid}.zs-meter{grid-template-columns:minmax(0,1fr) auto;align-items:baseline;gap:6px 10px;display:grid}.zs-meter>span:first-child{color:var(--zs-ink);font-size:13.5px;font-weight:550}.zs-meter small{color:var(--zs-quiet);font-variant-numeric:tabular-nums;font-size:12.5px}.zs-meter-bar{background:#17150f17;border-radius:999px;grid-column:1/-1;height:4px;overflow:hidden}.zs-meter-bar i{border-radius:inherit;background:var(--z-desk-gold);height:100%;display:block}.zs-meter em{color:var(--z-desk-rust-ink);grid-column:1/-1;font-size:12px;font-style:normal}.zs-meter.warning .zs-meter-bar i{background:var(--z-desk-rust)}.zs-switch{color:var(--zs-ink);cursor:pointer;justify-content:space-between;align-items:center;gap:16px;font-size:14px;display:flex}.zs-section>.zs-switch{border:1px solid var(--zs-rule);background:#fffdf880;border-radius:10px;max-width:520px;padding:11px 14px}.zs-switch input{cursor:pointer;-webkit-appearance:none;appearance:none;background:#17150f2e;border-radius:999px;flex:0 0 36px;order:2;width:36px;height:20px;margin:0;transition:background .14s;position:relative}.zs-switch input:after{content:"";background:#fffdf8;border-radius:999px;width:16px;height:16px;transition:transform .14s;position:absolute;inset-block-start:2px;inset-inline-start:2px;box-shadow:0 1px 2px #00000040}.zs-switch input:checked{background:var(--z-desk-gold)}.zs-switch input:checked:after{transform:translate(16px)}[dir=rtl] .zs-switch input:checked:after{transform:translate(-16px)}.zs-switch input:focus-visible{outline:2px solid var(--z-desk-gold);outline-offset:2px}.zs-switch:has(input:disabled){cursor:default;opacity:.55}.zs-switch input:disabled{cursor:default}.zs-field{gap:6px;max-width:620px;display:grid}.zs-field>span{color:var(--zs-quiet);font-size:13px;font-weight:550}.zs-input{border:1px solid var(--zs-rule-strong);width:100%;min-height:40px;color:var(--zs-ink);font:inherit;background:#fffdf8;border-radius:8px;padding:9px 12px;font-size:14px;line-height:1.55}textarea.zs-input{resize:vertical;min-height:120px}.zs-input::placeholder{color:var(--zs-faint)}.zs-input:focus{border-color:var(--z-desk-gold);box-shadow:0 0 0 3px var(--z-desk-gold-wash);outline:none}.zs-input:disabled{opacity:.6}.zs-actions{flex-wrap:wrap;align-items:center;gap:8px 10px;margin-top:4px;display:flex}.zs-footer{border-top:1px solid var(--zs-rule);background:var(--z-desk-paper);justify-content:flex-end;margin:0 -32px -28px;padding:14px 32px;display:flex;position:sticky;bottom:-28px}.zs-sheet .zs-btn{border:1px solid var(--zs-rule-strong);min-height:34px;color:var(--zs-ink);font:inherit;white-space:nowrap;cursor:pointer;background:#fffdf8;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:0 14px;font-size:13.5px;font-weight:600;line-height:1;text-decoration:none;transition:background .12s,border-color .12s;display:inline-flex}.zs-sheet .zs-btn:hover:not(:disabled){background:#fff;border-color:#17150f52}.zs-sheet .zs-btn-primary{border-color:var(--z-desk-gold);background:var(--z-desk-gold);color:var(--z-desk-gold-on)}.zs-sheet .zs-btn-primary:hover:not(:disabled){border-color:var(--z-desk-gold-hover);background:var(--z-desk-gold-hover)}.zs-sheet .zs-btn-quiet{color:var(--zs-quiet);background:0 0;border-color:#0000}.zs-sheet .zs-btn-quiet:hover:not(:disabled){color:var(--zs-ink);background:#17150f0f;border-color:#0000}.zs-sheet .zs-btn-danger{color:var(--z-desk-rust-ink);background:0 0;border-color:#9a4a2e66}.zs-sheet .zs-btn-danger:hover:not(:disabled){border-color:var(--z-desk-rust);background:var(--z-desk-rust-wash)}.zs-sheet .zs-btn:disabled{cursor:not-allowed;opacity:.5}.zs-confirm{gap:12px;max-width:420px;display:grid}.zs-error{color:var(--z-desk-rust-ink);margin:0;font-size:13px}@media (max-width:720px){.zs-overlay{place-items:stretch stretch;padding:0}.zs-sheet{border:0;border-radius:0;grid-template-rows:auto minmax(0,1fr);grid-template-columns:1fr;width:100%;height:100dvh}.zs-nav{border-bottom:1px solid var(--z-desk-border);flex-direction:row;gap:4px;padding:10px 12px;overflow-x:auto}.zs-nav-title{display:none}.zs-nav-row{flex:none}.zs-nav-row.active:before{width:auto;height:2px;inset-block:auto 0;inset-inline:10px}.zs-head{padding:16px 18px 14px}.zs-head h2{font-size:22px}.zs-body{padding:0 18px 24px}.zs-footer{margin:0 -18px -24px;padding:12px 18px;bottom:-24px}.zs-rows>div{grid-template-columns:1fr;gap:2px}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}