/*! tailwindcss v4.3.3 | 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,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--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}}}@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, 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;--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,::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,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, 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:where(:not(iframe)){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]){appearance:button}::file-selector-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;@layer utilities{.visible{visibility:visible}.fixed{position:fixed}.static{position:static}.container{width:100%}@media (width>=40rem){.container{max-width:40rem}}@media (width>=48rem){.container{max-width:48rem}}@media (width>=64rem){.container{max-width:64rem}}@media (width>=80rem){.container{max-width:80rem}}@media (width>=96rem){.container{max-width:96rem}}.block{display:block}.hidden{display:none}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.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,)}.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))}}:root{color:#192231;font-synthesis:none;text-rendering:optimizelegibility;--bg:#f4f6f9;--surface:#fff;--surface-soft:#eef3fb;--surface-muted:#e7ebf1;--text:#192231;--muted:#687386;--line:#dce2eb;--accent:#2d64d6;--accent-strong:#194cae;--accent-soft:#e8f0ff;--success:#277a53;--danger:#c34343;--warning:#96621b;--shadow:0 18px 52px #293a541a;--radius:14px;background:#f4f6f9;font-family:Segoe UI Variable,Segoe UI,Arial,sans-serif}:root[data-theme=dark]{color:#ecf1f8;--bg:#111722;--surface:#182131;--surface-soft:#202c40;--surface-muted:#273349;--text:#ecf1f8;--muted:#a8b3c5;--line:#314056;--accent:#75a0f8;--accent-strong:#9ab8fa;--accent-soft:#22385f;--success:#6dc795;--danger:#ff8b8b;--warning:#e5b56b;--shadow:0 18px 52px #0000003d;background:#111722}*{box-sizing:border-box}html{background:var(--bg);min-width:320px}body{background:var(--bg);min-width:320px;min-height:100dvh;color:var(--text);margin:0}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}:focus-visible{outline:3px solid var(--accent)}@supports (color:color-mix(in lab, red, red)){:focus-visible{outline:3px solid color-mix(in srgb, var(--accent) 50%, transparent)}}:focus-visible{outline-offset:3px}.app-shell{min-height:100dvh}.container{width:min(1220px,100% - 40px);margin-inline:auto}.topbar{border-bottom:1px solid var(--line);background:var(--surface);height:70px}@supports (color:color-mix(in lab, red, red)){.topbar{background:color-mix(in srgb, var(--surface) 92%, transparent)}}.topbar{z-index:20;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);align-items:center;display:flex;position:sticky;top:0}.topbar-inner{justify-content:space-between;align-items:center;gap:28px;display:flex}.brand{letter-spacing:-.02em;align-items:center;gap:11px;min-width:44px;min-height:44px;font-weight:760;text-decoration:none;display:inline-flex}.brand-mark{background:var(--accent);color:#fff;border-radius:10px;place-items:center;width:34px;height:34px;font-size:15px;display:grid}.topnav{align-items:center;gap:8px;display:flex}.topnav a,.topnav button{color:var(--muted);background:0 0;border:0;border-radius:9px;padding:9px 12px;text-decoration:none}.topnav a:hover,.topnav button:hover{background:var(--surface-soft);color:var(--text)}.topnav a.active{color:var(--accent-strong);background:var(--accent-soft)}.icon-button{border:1px solid var(--line);background:var(--surface);width:40px;height:40px;color:var(--text);border-radius:10px;place-items:center;display:inline-grid}.primary-button,.secondary-button{white-space:nowrap;border:1px solid #0000;border-radius:10px;justify-content:center;align-items:center;gap:9px;min-height:44px;padding:0 18px;font-weight:650;text-decoration:none;transition:transform .16s,background .16s,border-color .16s;display:inline-flex}.primary-button{background:var(--accent);color:#fff}.primary-button:hover{background:var(--accent-strong)}.secondary-button{background:var(--surface);border-color:var(--line);color:var(--text)}.secondary-button:hover{border-color:var(--accent);color:var(--accent-strong)}.danger-button{border:1px solid var(--danger);background:var(--danger);color:#fff;border-radius:10px;min-height:44px;padding:0 18px;font-weight:650}.primary-button:active,.secondary-button:active,.icon-button:active{transform:translateY(1px)}.text-button{color:var(--accent-strong);background:0 0;border:0;padding:6px 0;font-weight:640}.fullscreen-landing{background:#eeece6;width:100%;height:100dvh;min-height:100dvh;position:relative;overflow:hidden}.fullscreen-scene{isolation:isolate;background:linear-gradient(61deg,#e18c90 50%,#fbf3e5 50%);width:100%;height:100%;margin:0;position:absolute;inset:0;overflow:hidden}.scene-fallback-frame{left:var(--scene-x,0);top:var(--scene-y,0);width:var(--scene-width,100%);height:var(--scene-height,100%);pointer-events:none;-webkit-user-select:none;user-select:none;position:absolute;overflow:hidden}.scene-fallback{width:100%;max-width:none;height:100%;transform:matrix(var(--fallback-a,1), var(--fallback-b,0), 0, var(--fallback-d,1), var(--fallback-e,0), var(--fallback-f,0));transform-origin:0 0;display:block;position:absolute;inset:0}.scene-canvas{pointer-events:none;-webkit-user-select:none;user-select:none;opacity:0;width:100%;height:100%;transition:opacity .16s ease-out;display:block;position:absolute;inset:0}.scene-canvas.is-ready{opacity:1}.scene-load-note{color:#252525;background:#ffffffdf;padding:5px 8px;font-size:12px;position:absolute;bottom:12px;left:12px}.role-question{z-index:3;top:var(--book-top,44%);left:var(--book-x,50%);pointer-events:none;color:#202328;text-align:center;text-shadow:0 1px #ffffffe6,0 4px 20px #fff9;position:absolute;transform:translate(-50%,-130%)}.role-question h1{white-space:nowrap;letter-spacing:-.035em;margin:0;font-family:Segoe Print,Comic Sans MS,cursive;font-size:clamp(27px,2.7vw,46px);font-weight:650;line-height:1.1}.question-arrow{width:clamp(24px,2.4vw,42px);height:clamp(24px,2.4vw,42px);position:absolute}.question-arrow-student{top:58%;right:calc(100% + 10px)}.question-arrow-teacher{bottom:52%;left:calc(100% + 10px)}.landing-choices{z-index:2;position:absolute;inset:0}.role-choice{color:#202328;width:100%;text-decoration:none;transition:background-color .3s cubic-bezier(.16,1,.3,1);position:absolute;inset:0}.role-choice:before{content:"";opacity:0;background:linear-gradient(#ffffff24,#0000 38%,#1e212509);transition:opacity .3s cubic-bezier(.16,1,.3,1);position:absolute;inset:0}.role-choice:hover:before,.role-choice:focus-visible:before{opacity:1}.role-choice:focus-visible{outline-offset:-6px;outline:3px solid #1f2328a6}.student-choice{clip-path:polygon(0 0, var(--diagonal-top,50%) 0, var(--diagonal-bottom,50%) 100%, 0 100%)}.teacher-choice{clip-path:polygon(var(--diagonal-top,50%) 0, 100% 0, 100% 100%, var(--diagonal-bottom,50%) 100%)}.role-choice-label{letter-spacing:-.035em;text-shadow:0 1px #ffffffc7,0 3px 18px #ffffff6b;font-family:Segoe Print,Comic Sans MS,cursive;font-size:clamp(27px,2.55vw,46px);font-weight:600;line-height:1.1;transition:transform .3s cubic-bezier(.16,1,.3,1);display:inline-block;position:absolute}.student-choice .role-choice-label{top:calc(var(--book-top,50%) - 30px);left:calc(var(--book-x,50%) - clamp(220px, 18vw, 320px))}.teacher-choice .role-choice-label{top:calc(var(--book-top,50%) - clamp(165px, 13vw, 215px));left:calc(var(--book-x,50%) + clamp(100px, 9vw, 145px))}.student-choice:hover .role-choice-label,.student-choice:focus-visible .role-choice-label{transform:translate(7px)}.teacher-choice:hover .role-choice-label,.teacher-choice:focus-visible .role-choice-label{transform:translate(-7px)}.book-choice{z-index:4;left:var(--book-x,50%);top:var(--book-label-y,50%);width:max(64px, var(--book-label-width,224px));height:max(13px, var(--book-label-height,22px));color:#312a25;text-align:center;white-space:nowrap;font-family:Segoe Print,Comic Sans MS,cursive;font-size:clamp(7px, calc(17px * var(--scene-scale,1)), 18px);letter-spacing:-.02em;pointer-events:auto;place-items:center;padding:0 5px;font-weight:700;line-height:1;text-decoration:none;transition:background-color .2s,transform .2s;display:grid;position:absolute;overflow:hidden;transform:translate(-50%,-50%)rotate(-2.86deg)}.book-choice:hover,.book-choice:focus-visible{background:#fff9ed3d}.book-choice:active{transform:translate(-50%,-50%)rotate(-2.86deg)scale(.98)}.book-choice:focus-visible{outline-offset:2px;outline:2px solid #312a25}.book-choice-short{display:none}.about-page{--about-accent:#a33b3d;--about-paper:#f6f0e7;--about-paper-deep:#ede2d4;background:var(--about-paper);color:#2c2927;scroll-behavior:smooth;min-height:100dvh;overflow-x:clip}:root[data-theme=dark] .about-page{--about-paper:#211c1a;--about-paper-deep:#2c2522;color:#f1e9e1}.about-page h1,.about-page h2,.about-page h3,.about-page p{text-wrap:pretty}.about-header{z-index:20;border-bottom:1px solid;justify-content:space-between;align-items:center;gap:30px;min-height:70px;padding:12px max(24px,50% - 640px);display:flex;position:sticky;top:0}@supports (color:color-mix(in lab, red, red)){.about-header{border-bottom:1px solid color-mix(in srgb, currentColor 14%, transparent)}}.about-header{background:var(--about-paper)}@supports (color:color-mix(in lab, red, red)){.about-header{background:color-mix(in srgb, var(--about-paper) 88%, transparent)}}.about-header{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.about-header nav{align-items:center;gap:clamp(18px,3vw,38px);display:flex}.about-header nav a{color:inherit;font-size:14px;font-weight:650;text-decoration:none}.about-header nav a:hover{color:var(--about-accent)}.about-back{color:currentColor;align-items:center;gap:9px;width:fit-content;min-height:44px;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.about-back{color:color-mix(in srgb, currentColor 68%, transparent)}}.about-back{font-weight:650;text-decoration:none;transition:color .18s,transform .18s}.about-back:hover{color:inherit;transform:translate(-3px)}.about-back:active{transform:translate(-3px)scale(.98)}.about-hero{grid-template-columns:minmax(360px,.88fr) minmax(0,1.12fr);align-items:center;gap:clamp(38px,6vw,96px);width:min(1280px,100% - 48px);min-height:calc(100dvh - 70px);margin-inline:auto;padding-block:clamp(52px,7vw,96px);display:grid}.about-hero-copy{max-width:650px}.about-kicker,.about-role-heading>p{color:var(--about-accent);letter-spacing:.035em;margin:0 0 18px;font-size:14px;font-weight:800}.about-hero h1{letter-spacing:-.06em;max-width:12ch;margin:0;font-size:clamp(48px,5.9vw,86px);font-weight:735;line-height:.98}.about-hero-copy>p:not(.about-kicker){color:currentColor;max-width:50ch;margin:26px 0 0}@supports (color:color-mix(in lab, red, red)){.about-hero-copy>p:not(.about-kicker){color:color-mix(in srgb, currentColor 68%, transparent)}}.about-hero-copy>p:not(.about-kicker){font-size:clamp(18px,1.55vw,21px);line-height:1.6}.about-hero-actions{align-items:center;gap:22px;margin-top:34px;display:flex}.about-primary-link{border:1px solid var(--about-accent);background:var(--about-accent);color:#fff8f0;border-radius:10px;justify-content:center;align-items:center;gap:10px;width:fit-content;min-height:48px;padding:0 19px;font-weight:720;text-decoration:none;transition:transform .18s,background .18s;display:inline-flex}.about-primary-link:hover{background:#843033;transform:translateY(-2px)}.about-text-link{color:inherit;align-items:center;gap:8px;font-weight:720;text-decoration:none;display:inline-flex}.about-text-link:hover{color:var(--about-accent)}.about-visual{margin:0;position:relative}.about-visual:before{content:"";z-index:-1;background:var(--about-paper-deep);position:absolute;inset:10% -4% -8% 16%;transform:rotate(2.4deg)}.about-visual img{width:100%;height:auto;display:block;box-shadow:0 30px 80px #52302a21}.about-summary{border-top:1px solid;grid-template-columns:minmax(0,1.2fr) minmax(480px,1fr);gap:clamp(48px,8vw,120px);width:min(1160px,100% - 48px);margin-inline:auto;padding:clamp(76px,10vw,144px) 0;display:grid}@supports (color:color-mix(in lab, red, red)){.about-summary{border-top:1px solid color-mix(in srgb, currentColor 15%, transparent)}}.about-summary>p{letter-spacing:-.035em;max-width:28ch;margin:0;font-family:Georgia,Times New Roman,serif;font-size:clamp(28px,3.4vw,48px);line-height:1.16}.about-summary dl{grid-template-columns:repeat(3,1fr);align-self:end;gap:20px;margin:0;display:grid}.about-summary dl div{min-width:0}.about-summary dt{color:var(--about-accent);letter-spacing:-.04em;font-size:clamp(28px,3vw,44px);font-weight:760}.about-summary dd{color:currentColor;margin:8px 0 0}@supports (color:color-mix(in lab, red, red)){.about-summary dd{color:color-mix(in srgb, currentColor 66%, transparent)}}.about-summary dd{font-size:13px;line-height:1.5}.about-role-section{grid-template-columns:minmax(280px,.75fr) minmax(400px,1.25fr);gap:clamp(52px,9vw,140px);padding:clamp(82px,10vw,148px) max(24px,50% - 580px);scroll-margin-top:86px;display:grid}.student-section{background:#e8d8d0}.teacher-section{background:#dfe5d9}:root[data-theme=dark] .student-section{background:#342522}:root[data-theme=dark] .teacher-section{background:#253027}.about-role-heading{align-self:start;position:sticky;top:108px}.about-role-heading>svg,.about-content-heading>svg,.about-account>div>svg,.about-sources>div>svg{color:var(--about-accent);margin-bottom:28px}.about-role-heading h2,.about-subjects h2,.about-content h2,.about-account h2,.about-sources h2{letter-spacing:-.05em;margin:0;font-size:clamp(36px,4.5vw,62px);line-height:1.04}.about-role-heading>span{color:currentColor;max-width:42ch;margin-top:22px;display:block}@supports (color:color-mix(in lab, red, red)){.about-role-heading>span{color:color-mix(in srgb, currentColor 68%, transparent)}}.about-role-heading>span{font-size:17px;line-height:1.6}.about-role-section>.about-primary-link{grid-column:2;margin-top:-14px}.about-journey{margin:0;padding:0;list-style:none}.about-journey li{border-bottom:1px solid;grid-template-columns:46px 1fr;gap:20px;padding:27px 0;display:grid}@supports (color:color-mix(in lab, red, red)){.about-journey li{border-bottom:1px solid color-mix(in srgb, currentColor 18%, transparent)}}.about-journey li:first-child{padding-top:0}.about-journey li>span{border:1px solid;place-items:center;width:34px;height:34px;display:grid}@supports (color:color-mix(in lab, red, red)){.about-journey li>span{border:1px solid color-mix(in srgb, currentColor 34%, transparent)}}.about-journey li>span{border-radius:50%;font-weight:760}.about-journey h3{margin:1px 0 8px;font-size:22px}.about-journey p{color:currentColor;max-width:54ch;margin:0}@supports (color:color-mix(in lab, red, red)){.about-journey p{color:color-mix(in srgb, currentColor 68%, transparent)}}.about-journey p{line-height:1.6}.about-subjects,.about-content,.about-account,.about-sources,.about-footer{width:min(1160px,100% - 48px);margin-inline:auto}.about-subjects{grid-template-columns:minmax(280px,.8fr) minmax(460px,1.2fr);gap:28px clamp(54px,9vw,130px);padding-block:clamp(90px,11vw,160px);display:grid}.about-subjects>div>p:last-child,.about-content-heading>p:last-child{color:currentColor;max-width:55ch;margin:22px 0 0}@supports (color:color-mix(in lab, red, red)){.about-subjects>div>p:last-child,.about-content-heading>p:last-child{color:color-mix(in srgb, currentColor 68%, transparent)}}.about-subjects>div>p:last-child,.about-content-heading>p:last-child{font-size:17px;line-height:1.6}.about-subjects ul{columns:2;column-gap:30px;margin:0;padding:0;list-style:none}.about-subjects li{break-inside:avoid;border-bottom:1px solid;padding:12px 0}@supports (color:color-mix(in lab, red, red)){.about-subjects li{border-bottom:1px solid color-mix(in srgb, currentColor 15%, transparent)}}.about-subjects li{font-weight:660}.about-subjects aside{border-left:4px solid var(--about-accent);background:var(--about-paper-deep);grid-column:2;padding:22px 24px}.about-subjects aside p{color:currentColor;margin:8px 0 0}@supports (color:color-mix(in lab, red, red)){.about-subjects aside p{color:color-mix(in srgb, currentColor 68%, transparent)}}.about-subjects aside p{line-height:1.55}.about-content{border-top:1px solid;padding-block:clamp(88px,10vw,150px);scroll-margin-top:86px}@supports (color:color-mix(in lab, red, red)){.about-content{border-top:1px solid color-mix(in srgb, currentColor 15%, transparent)}}.about-content-heading{max-width:770px}.about-process{grid-template-columns:repeat(4,1fr);gap:26px;margin-top:72px;display:grid}.about-process article{min-width:0}.about-process svg{width:28px;height:28px;color:var(--about-accent)}.about-process h3{margin:24px 0 9px;font-size:21px}.about-process p{color:currentColor;margin:0}@supports (color:color-mix(in lab, red, red)){.about-process p{color:color-mix(in srgb, currentColor 68%, transparent)}}.about-process p{line-height:1.58}.about-material-types{background:var(--about-paper-deep);grid-template-columns:.7fr 1.3fr;gap:40px;margin-top:72px;padding:34px 38px;display:grid}.about-material-types h3{margin:0;font-size:25px}.about-material-types p{color:currentColor;margin:0}@supports (color:color-mix(in lab, red, red)){.about-material-types p{color:color-mix(in srgb, currentColor 70%, transparent)}}.about-material-types p{font-size:17px;line-height:1.65}.about-account{border-top:1px solid;grid-template-columns:minmax(300px,1fr) minmax(380px,1fr);gap:clamp(60px,9vw,130px);padding-block:clamp(84px,10vw,140px);display:grid}@supports (color:color-mix(in lab, red, red)){.about-account{border-top:1px solid color-mix(in srgb, currentColor 15%, transparent)}}.about-account-copy{align-self:end;gap:20px;display:grid}.about-account-copy p{color:currentColor;grid-template-columns:28px 1fr;gap:14px;margin:0;display:grid}@supports (color:color-mix(in lab, red, red)){.about-account-copy p{color:color-mix(in srgb, currentColor 72%, transparent)}}.about-account-copy p{font-size:17px;line-height:1.62}.about-account-copy p:first-child{color:inherit;font-size:20px;display:block}.about-account-copy svg{color:var(--about-accent);margin-top:3px}.about-sources{border-top:1px solid;grid-template-columns:minmax(300px,.9fr) minmax(400px,1.1fr);gap:clamp(60px,9vw,130px);padding-block:clamp(84px,10vw,140px);display:grid}@supports (color:color-mix(in lab, red, red)){.about-sources{border-top:1px solid color-mix(in srgb, currentColor 15%, transparent)}}.about-source-links a{border-bottom:1px solid;justify-content:space-between;align-items:center;gap:20px;min-height:68px;display:flex}@supports (color:color-mix(in lab, red, red)){.about-source-links a{border-bottom:1px solid color-mix(in srgb, currentColor 18%, transparent)}}.about-source-links a{color:inherit;font-weight:680;text-decoration:none}.about-source-links a:hover{color:var(--about-accent)}.about-source-links a:hover svg{transform:translate(4px)}.about-source-links svg{transition:transform .18s}.about-footer{border-top:1px solid;justify-content:space-between;align-items:center;gap:40px;padding-block:48px 64px;display:flex}@supports (color:color-mix(in lab, red, red)){.about-footer{border-top:1px solid color-mix(in srgb, currentColor 15%, transparent)}}.about-footer p{color:currentColor;max-width:58ch;margin:0}@supports (color:color-mix(in lab, red, red)){.about-footer p{color:color-mix(in srgb, currentColor 68%, transparent)}}.about-footer p{line-height:1.6}@media (width<=980px) and (width>=721px){.about-header{padding-inline:24px}.about-hero{grid-template-columns:.9fr 1.1fr;gap:36px;width:calc(100% - 48px)}.about-summary,.about-subjects,.about-content,.about-account,.about-sources,.about-footer{width:calc(100% - 48px)}.about-summary{grid-template-columns:1fr}.about-summary>p{max-width:36ch}.about-role-section{grid-template-columns:minmax(240px,.8fr) minmax(0,1.2fr);gap:46px;padding-inline:24px}.about-subjects,.about-account,.about-sources{grid-template-columns:minmax(240px,.9fr) minmax(0,1.1fr);gap:46px}.about-process{grid-template-columns:1fr 1fr;gap:44px}}@media (width<=720px){.role-question{transform:translate(-50%,-135%)}.role-choice-label{font-size:clamp(23px,7vw,32px)}.student-choice .role-choice-label{top:calc(var(--book-top,50%) - 8px);left:calc(var(--book-x,50%) - clamp(125px, 33vw, 145px))}.teacher-choice .role-choice-label{top:calc(var(--book-top,50%) - clamp(82px, 22vw, 118px));left:calc(var(--book-x,50%) + clamp(70px, 20vw, 100px))}.book-choice{padding:0 3px}.book-choice-full{display:none}.book-choice-short{display:inline}.about-header{padding-inline:16px}.about-header nav{display:none}.about-hero{grid-template-columns:1fr;gap:42px;width:min(100% - 32px,620px);min-height:auto;padding-block:48px 64px}.about-hero h1{max-width:11ch;font-size:clamp(42px,13vw,64px)}.about-hero-actions{flex-direction:column;align-items:stretch}.about-hero-actions .about-primary-link{width:100%}.about-hero-actions .about-text-link{justify-content:center;min-height:46px}.about-visual:before{inset:8% -2% -6% 12%}.about-summary{grid-template-columns:1fr;gap:48px;width:min(100% - 32px,620px)}.about-summary dl{grid-template-columns:1fr;gap:24px}.about-summary dl div{grid-template-columns:90px 1fr;align-items:baseline;gap:14px;display:grid}.about-summary dd{margin-top:0}.about-role-section{grid-template-columns:1fr;gap:44px;padding-inline:16px}.about-role-heading{position:static}.about-role-section>.about-primary-link{grid-column:auto;width:100%;margin-top:0}.about-subjects,.about-content,.about-account,.about-sources,.about-footer{width:min(100% - 32px,620px)}.about-subjects,.about-account,.about-sources{grid-template-columns:1fr}.about-subjects aside{grid-column:auto}.about-subjects ul{columns:1}.about-process{grid-template-columns:1fr 1fr;gap:42px 24px;margin-top:52px}.about-material-types{grid-template-columns:1fr;gap:16px;padding:26px 22px}.about-footer{flex-direction:column;align-items:stretch}.about-footer .about-primary-link{width:100%}}@media (width<=430px){.about-journey li{grid-template-columns:38px 1fr;gap:14px}.about-process{grid-template-columns:1fr}.about-account-copy p{grid-template-columns:24px 1fr;gap:10px}}@media (prefers-reduced-motion:reduce){.scene-canvas,.role-choice,.role-choice:before,.role-choice-label,.book-choice,.about-back,.about-primary-link,.about-source-links svg{transition:none}}.page{padding:34px 0 70px}.page-heading{margin-bottom:28px}.page-heading h1{letter-spacing:-.035em;margin:0 0 8px;font-size:clamp(30px,3.5vw,46px)}.page-heading p{color:var(--muted);margin:0}.empty-state{text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);place-items:center;min-height:340px;padding:32px;display:grid}.dialog-overlay{z-index:50;background:#0f192a7a;position:fixed;inset:0}.dialog-content{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);width:min(460px,100% - 32px);box-shadow:var(--shadow);z-index:51;padding:26px;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%)}.dialog-content h2{letter-spacing:-.03em;margin:0 0 8px;font-size:26px}.dialog-content p{color:var(--muted);margin:0 0 22px;line-height:1.5}.dialog-close{position:absolute;top:16px;right:16px}.form-field{gap:7px;margin-bottom:18px;display:grid}.form-field label{font-size:14px;font-weight:650}.form-field input,.form-field select,.form-field textarea{border:1px solid var(--line);background:var(--bg);min-height:44px;color:var(--text);border-radius:10px;padding:10px 12px}.form-field input:user-invalid{border-color:var(--danger)}.form-field small{color:var(--muted);line-height:1.45}.form-field textarea{resize:vertical;min-height:96px}.auth-page{--bg:#f7f1e9;--surface:#fffaf4;--surface-soft:#f2e6da;--surface-muted:#ead9ca;--text:#2d2928;--muted:#716762;--line:#ddcfc2;--accent:#a7433d;--accent-strong:#7f302d;--accent-soft:#f5dfdb;--success:#3d7659;--danger:#ad3535;--warning:#8a5a22;--shadow:0 24px 68px #5e372b24;background:radial-gradient(circle at 7% 18%, #cb6c5b29, transparent 27%), radial-gradient(circle at 88% 82%, #e0b16d21, transparent 30%), var(--bg);min-height:100dvh;position:relative;overflow:hidden}:root[data-theme=dark] .auth-page{--bg:#211b1a;--surface:#2d2422;--surface-soft:#392c29;--surface-muted:#483531;--text:#f4ece7;--muted:#c3b4aa;--line:#55413c;--accent:#d7796f;--accent-strong:#f0a198;--accent-soft:#4e2e2d;--success:#83ba96;--danger:#ff9893;--warning:#e1ad70;--shadow:0 24px 68px #0000004d;background:radial-gradient(circle at 7% 18%, #973f3833, transparent 28%), radial-gradient(circle at 88% 82%, #7f532e29, transparent 30%), var(--bg)}.auth-page .topbar{background:var(--surface)}@supports (color:color-mix(in lab, red, red)){.auth-page .topbar{background:color-mix(in srgb, var(--surface) 88%, transparent)}}.auth-layout{z-index:1;grid-template-columns:minmax(0,1fr) minmax(420px,580px);align-items:center;gap:clamp(48px,7vw,104px);min-height:calc(100dvh - 72px);padding-block:64px;display:grid;position:relative}.auth-intro{max-width:620px}.auth-intro h1{letter-spacing:-.05em;text-wrap:balance;max-width:10ch;margin:14px 0 18px;font-size:clamp(42px,5vw,66px);line-height:1.03}.auth-intro>p:last-child{color:var(--muted);font-size:18px;line-height:1.6}.auth-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:28px}@supports (color:color-mix(in lab, red, red)){.auth-panel{background:color-mix(in srgb, var(--surface) 96%, transparent)}}.auth-panel{box-shadow:var(--shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.auth-tabs{background:var(--surface-soft);border-radius:11px;grid-template-columns:1fr 1fr;gap:4px;margin-bottom:26px;padding:4px;display:grid}.auth-tabs button{min-height:40px;color:var(--muted);background:0 0;border:0;border-radius:8px;font-weight:650}.auth-tabs button.active{background:var(--surface);color:var(--text);box-shadow:0 2px 10px #2b3d5914}.role-picker{border:0;grid-template-columns:1fr 1fr;gap:8px;margin:0 0 20px;padding:0;display:grid}.role-picker legend{grid-column:1/-1;margin-bottom:7px;padding:0;font-size:14px;font-weight:650}.role-picker button{border:1px solid var(--line);background:var(--surface);min-height:46px;color:var(--muted);border-radius:10px;justify-content:center;align-items:center;gap:8px;display:flex}.role-picker button.active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-strong)}.role-picker button:disabled.active{opacity:1}.consent-field{color:var(--muted);grid-template-columns:20px 1fr;align-items:start;gap:10px;margin:4px 0 20px;font-size:14px;line-height:1.45;display:grid}.consent-field input{width:18px;height:18px;accent-color:var(--accent);margin:1px 0 0}.auth-panel .form-error{margin-top:0!important}.auth-assurances{gap:12px;margin-top:32px;display:grid}.auth-assurances span{color:var(--muted);align-items:center;gap:10px;font-size:14px;display:flex}.auth-assurances svg{color:var(--accent-strong);flex:none}.auth-assurances .invite-assurance{color:var(--success)}.registration-panel{position:relative}.prototype-note{border-bottom:1px solid var(--line);grid-template-columns:auto 1fr;align-items:center;gap:10px;margin:-6px 0 22px;padding-bottom:18px;display:grid}.prototype-note span{border:1px solid var(--warning);padding:4px 8px}@supports (color:color-mix(in lab, red, red)){.prototype-note span{border:1px solid color-mix(in srgb, var(--warning) 48%, var(--line))}}.prototype-note span{color:var(--warning);background:var(--warning);border-radius:6px}@supports (color:color-mix(in lab, red, red)){.prototype-note span{background:color-mix(in srgb, var(--warning) 8%, var(--surface))}}.prototype-note span{letter-spacing:.08em;text-transform:uppercase;font-size:11px;font-weight:800}.prototype-note p{color:var(--muted);margin:0;font-size:13px;line-height:1.4}.registration-steps{grid-template-columns:repeat(4,1fr);gap:0;margin:0 0 28px;padding:0;list-style:none;display:grid}.registration-steps li{color:var(--muted);justify-items:center;gap:6px;display:grid;position:relative}.registration-steps li:not(:last-child):after{content:"";z-index:0;background:var(--line);width:calc(100% - 32px);height:1px;position:absolute;top:13px;left:calc(50% + 16px)}.registration-steps li.complete:not(:last-child):after{background:var(--accent)}@supports (color:color-mix(in lab, red, red)){.registration-steps li.complete:not(:last-child):after{background:color-mix(in srgb, var(--accent) 60%, var(--line))}}.registration-steps li>span{z-index:1;border:1px solid var(--line);background:var(--surface);border-radius:50%;place-items:center;width:27px;height:27px;font-size:12px;font-weight:750;display:grid;position:relative}.registration-steps li small{font-size:11px}.registration-steps li.active{color:var(--accent-strong)}.registration-steps li.active>span{border-color:var(--accent);background:var(--accent);color:#fff}.registration-steps li.complete>span{border-color:var(--accent);color:var(--accent-strong);background:var(--accent-soft)}.method-picker{border:0;grid-template-columns:1fr 1fr;gap:10px;margin:0 0 22px;padding:0;display:grid}.method-picker legend{grid-column:1/-1;margin-bottom:5px;padding:0;font-size:14px;font-weight:650}.method-picker button{border:1px solid var(--line);background:var(--surface);min-height:76px;color:var(--text);text-align:left;border-radius:11px;grid-template-columns:38px 1fr;align-items:center;gap:12px;padding:12px;display:grid;position:relative}.method-picker button:hover:not(:disabled){border-color:var(--accent)}@supports (color:color-mix(in lab, red, red)){.method-picker button:hover:not(:disabled){border-color:color-mix(in srgb, var(--accent) 55%, var(--line))}}.method-picker button.active{border-color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent)}.method-picker button:disabled{opacity:1;background:var(--surface-soft);border-style:dashed}@supports (color:color-mix(in lab, red, red)){.method-picker button:disabled{background:color-mix(in srgb, var(--surface-soft) 56%, var(--surface))}}.method-picker button:disabled{color:var(--muted)}.method-picker button:disabled .method-icon{color:var(--muted);background:var(--surface-muted)}.method-picker button>span:nth-child(2){gap:3px;min-width:0;display:grid}.method-picker strong,.method-picker small{display:block}.method-picker strong{font-size:15px}.method-picker small{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.method-icon{background:var(--surface-soft);width:38px;height:38px;color:var(--accent-strong);border-radius:9px;place-items:center;font-size:14px;font-weight:800;display:grid}.method-icon svg{width:20px;height:20px}.method-check{color:var(--accent);position:absolute;top:7px;right:7px}.registration-live-note{border-left:3px solid var(--success);color:var(--muted);background:var(--success);border-radius:0 10px 10px 0;grid-template-columns:auto 1fr;align-items:start;gap:10px;margin:-6px 0 22px;padding:13px 14px;display:grid}@supports (color:color-mix(in lab, red, red)){.registration-live-note{background:color-mix(in srgb, var(--success) 8%, var(--surface))}}.registration-live-note svg{color:var(--success);margin-top:1px}.registration-live-note p{margin:0;font-size:13px;line-height:1.45}.registration-live-note strong{color:var(--text)}.invite-note{border-left:3px solid var(--success);background:var(--success);margin:-7px 0 18px;padding:10px 12px}@supports (color:color-mix(in lab, red, red)){.invite-note{background:color-mix(in srgb, var(--success) 8%, var(--surface))}}.invite-note{color:var(--muted);font-size:13px;line-height:1.45}.invite-note strong{color:var(--text)}.registration-stage-heading{margin-bottom:22px}.registration-stage-heading h2{letter-spacing:-.03em;margin:0;font-size:25px;line-height:1.15}.provider-placeholder{border:1px dashed var(--accent);grid-template-columns:52px 1fr;align-items:center;gap:16px;min-height:116px;margin-bottom:22px;padding:20px;display:grid}@supports (color:color-mix(in lab, red, red)){.provider-placeholder{border:1px dashed color-mix(in srgb, var(--accent) 45%, var(--line))}}.provider-placeholder{background:var(--surface-soft)}.provider-placeholder-mark{background:var(--accent);color:#fff;border-radius:12px;place-items:center;width:52px;height:52px;font-weight:800;display:grid}.provider-placeholder strong{margin-bottom:5px;display:block}.provider-placeholder p{color:var(--muted);margin:0;font-size:13px;line-height:1.45}.verification-input{letter-spacing:.3em;font-weight:700;font-size:18px!important}.login-choice{border:0;grid-template-columns:1fr 1fr;gap:9px;margin:0 0 18px;padding:0;display:grid}.login-choice legend{grid-column:1/-1;margin-bottom:1px;padding:0;font-size:14px;font-weight:650}.login-choice label{border:1px solid var(--line);cursor:pointer;border-radius:10px;grid-template-columns:18px 1fr;align-items:start;gap:9px;min-width:0;padding:12px;display:grid}.login-choice label:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}.login-choice input{accent-color:var(--accent);margin:2px 0 0}.login-choice label>span{gap:3px;min-width:0;font-size:13px;font-weight:650;display:grid}.login-choice small{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:11px;font-weight:450;overflow:hidden}.password-grid{grid-template-columns:1fr 1fr;gap:10px;display:grid}.field-advice{color:var(--muted);margin:-8px 0 18px;font-size:12px;line-height:1.45}.registration-actions{justify-content:space-between;gap:12px;margin-top:5px;display:flex}.registration-actions .primary-button{flex:1}.optional-contact{border-left:3px solid var(--accent);background:var(--surface-soft);margin-bottom:20px;padding:18px 18px 1px}.optional-contact>div:first-child{gap:4px;margin-bottom:15px;display:grid}.optional-contact>div:first-child span{color:var(--muted);font-size:12px}.optional-contact .form-field label span{color:var(--muted);font-weight:450}.subject-picker{border:0;gap:9px;margin:0 0 20px;padding:0;display:grid}.subject-picker legend,.subject-picker>p{grid-column:1/-1}.subject-picker legend{padding:0;font-size:14px;font-weight:650}.subject-picker>p{color:var(--muted);margin:-4px 0 2px;font-size:12px}.subject-groups{scrollbar-color:var(--line) transparent;gap:14px;max-height:min(42dvh,390px);padding:2px 7px 4px 2px;display:grid;overflow-y:auto}.subject-group{gap:7px;display:grid}.subject-group h3{color:var(--muted);margin:0;font-size:12px;font-weight:700}.subject-group>div{grid-template-columns:1fr 1fr;gap:7px;display:grid}.subject-picker label{border:1px solid var(--line);cursor:pointer;border-radius:10px;align-items:center;gap:9px;min-height:46px;padding:10px 12px;display:flex}.subject-picker label:has(input:checked){border-color:var(--accent);background:var(--accent-soft);color:var(--accent-strong)}.subject-picker input{width:17px;height:17px;accent-color:var(--accent);margin:0}.registration-complete{text-align:center;padding:22px 8px 8px}.registration-complete>svg{color:var(--success)}.registration-complete .section-label{margin:12px 0 7px}.registration-complete h2{letter-spacing:-.035em;margin:0;font-size:28px}.registration-complete>p:not(.section-label){max-width:42ch;color:var(--muted);margin:14px auto 24px;line-height:1.55}.registration-complete-actions{justify-content:center;gap:10px;display:flex}.form-success{font-size:14px;color:var(--success)!important}.verify-email-page{min-height:100dvh}.verify-email-layout{place-items:center;min-height:calc(100dvh - 70px);padding-block:42px;display:grid}.verify-email-card{border:1px solid var(--line);background:var(--surface);width:min(100%,620px);box-shadow:var(--shadow);text-align:center;border-radius:24px;padding:clamp(30px,6vw,54px)}.verify-email-card h1{letter-spacing:-.045em;margin:8px 0 14px;font-size:clamp(32px,6vw,48px)}.verify-email-card>p:not(.section-label){max-width:48ch;color:var(--muted);margin:0 auto 26px;line-height:1.6}.verify-email-icon{color:var(--accent-strong)}.verify-email-icon.success{color:var(--success)}.verify-email-icon.warning{color:var(--warning)}.verify-email-icon.checking{animation:1.6s ease-in-out infinite email-pulse}@keyframes email-pulse{50%{opacity:.45;transform:translateY(-2px)}}.primary-button:disabled{opacity:.6;cursor:not-allowed;transform:none}.form-actions{justify-content:flex-end;gap:10px;display:flex}.dashboard-header{justify-content:space-between;align-items:flex-end;gap:28px;margin-bottom:28px;display:flex}.dashboard-header h1{letter-spacing:-.045em;margin:3px 0 8px;font-size:clamp(34px,4vw,52px)}.dashboard-header p{color:var(--muted);margin:0}.section-label{font-size:13px;font-weight:750;color:var(--accent-strong)!important}.quick-grid{grid-template-columns:1.35fr 1fr 1fr;gap:12px;display:grid}.metric{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);min-height:116px;color:var(--accent-strong);align-items:center;gap:16px;padding:20px;display:flex}.metric.feature-metric{background:var(--accent);color:#fff;border-color:var(--accent)}.metric div{gap:4px;display:grid}.metric span{color:inherit;opacity:.78;font-size:14px}.metric strong{letter-spacing:-.03em;font-size:28px}.dashboard-section{margin-top:34px}.section-heading{margin-bottom:16px}.section-heading h2,.panel-title h2{letter-spacing:-.025em;margin:0 0 5px;font-size:24px}.section-heading p,.panel-title p{color:var(--muted);margin:0;font-size:14px}.subject-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.subject-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);flex-direction:column;justify-content:space-between;gap:24px;min-height:235px;padding:23px;text-decoration:none;display:flex}.subject-card:first-child{background:linear-gradient(145deg, var(--surface), var(--accent-soft))}.subject-card:hover{border-color:var(--accent)}.subject-card.pending{min-height:218px}.subject-card.pending .subject-score{color:var(--accent-strong);font-weight:650}.subject-card-top,.subject-score{justify-content:space-between;align-items:center;gap:16px;display:flex}.subject-icon,.large-subject-icon{background:var(--accent-soft);width:48px;height:48px;color:var(--accent-strong);border-radius:12px;place-items:center;display:grid}.subject-card h3{margin:0 0 7px;font-size:26px}.subject-card p{color:var(--muted);max-width:480px;margin:0;line-height:1.5}.subject-score{border-top:1px solid var(--line);color:var(--muted);padding-top:18px;font-size:14px}.subject-score strong{color:var(--text);font-size:21px}.dashboard-columns{grid-template-columns:1fr 1fr;gap:14px;margin-top:34px;display:grid}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.panel-title{justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:18px;display:flex}.panel-title>svg{color:var(--accent-strong)}.stack-list{gap:4px;display:grid}.list-row{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;min-height:66px;padding:10px 0;text-decoration:none;display:flex}.list-row:last-child{border-bottom:0}.list-row>div:first-child{gap:5px;display:grid}.list-row span{color:var(--muted);font-size:13px}.row-meta{color:var(--muted);text-align:right;align-items:center;gap:7px;font-size:13px;display:flex}.score-good{color:var(--success)}.score-warn{color:var(--warning)}.compact-empty{color:var(--muted);text-align:center;padding:28px 0}.narrow-container{max-width:960px}.back-link{color:var(--muted);align-items:center;gap:7px;margin-bottom:24px;text-decoration:none;display:inline-flex}.subject-hero{grid-template-columns:auto 1fr auto;align-items:center;gap:20px;margin-bottom:24px;display:grid}.large-subject-icon{border-radius:var(--radius);width:66px;height:66px}.subject-hero h1{letter-spacing:-.04em;margin:2px 0 5px;font-size:42px}.subject-hero p{color:var(--muted);margin:0}.subject-result{text-align:right;color:var(--muted);gap:3px;font-size:13px;display:grid}.subject-result strong{color:var(--text);font-size:32px}.subject-ticket{justify-content:space-between;align-items:center;gap:28px;display:flex}.subject-ticket h2{margin:0 0 7px}.subject-ticket p{color:var(--muted);margin:0}.subject-ticket-pending{background:linear-gradient(145deg, var(--surface), var(--accent-soft));align-items:flex-end}.subject-ticket-pending>div{grid-template-columns:auto 1fr;align-items:center;column-gap:12px;display:grid}.subject-ticket-pending h2{margin:0}.subject-ticket-pending p{grid-column:1/-1;max-width:620px;margin-top:10px}.subject-pending-icon{background:var(--surface);width:40px;height:40px;color:var(--accent-strong);border-radius:10px;grid-row:1/3;place-items:center;display:grid}.topic-list{grid-template-columns:1fr 1fr;gap:10px;display:grid}.topic-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;grid-template-columns:auto 1fr auto;align-items:center;gap:13px;padding:17px;display:grid}.topic-item>span:first-child{color:var(--accent-strong)}.topic-item p{color:var(--muted);margin:4px 0 0;font-size:13px}.topic-index{color:var(--muted);font-size:13px}.exam-page{padding-top:22px}.exam-container{width:min(1380px,100% - 40px)}.exam-toolbar{justify-content:space-between;align-items:flex-start;gap:18px;height:46px;display:flex}.timer{font-variant-numeric:tabular-nums;align-items:center;gap:8px;font-weight:680;display:flex}.exam-layout{grid-template-columns:minmax(0,1fr) 300px;gap:14px;display:grid}.question-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);flex-direction:column;min-height:680px;display:flex;overflow:hidden}.question-header{border-bottom:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;gap:20px;padding:20px 24px;font-size:14px;display:flex}.question-header>div{align-items:center;gap:12px;display:flex}.question-header strong{color:var(--text)}.question-body{flex:1;padding:36px 42px}.question-topic{color:var(--accent-strong);margin:0 0 11px;font-size:14px;font-weight:700}.question-body h1{letter-spacing:-.035em;max-width:760px;margin:0;font-size:clamp(24px,3vw,36px);line-height:1.28}.answer-list{border:0;gap:10px;max-width:780px;margin:34px 0 0;padding:0;display:grid}.answer-list legend{color:var(--muted);margin-bottom:11px;font-size:14px}.answer-option{border:1px solid var(--line);cursor:pointer;border-radius:11px;grid-template-columns:auto auto 1fr auto;align-items:center;gap:13px;min-height:64px;padding:12px 16px;display:grid}.answer-option:hover{border-color:var(--accent)}.answer-option.selected{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-strong)}.answer-option input{opacity:0;pointer-events:none;position:absolute}.answer-letter{background:var(--surface-soft);width:32px;height:32px;color:var(--text);border-radius:9px;place-items:center;font-weight:700;display:grid}.question-footer{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;min-height:84px;padding:18px 24px;display:flex}.exam-sidebar{align-content:start;gap:14px;display:grid}.question-map{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.question-map button{border:1px solid var(--line);background:var(--bg);height:46px;color:var(--text);border-radius:9px}.question-map button.answered{background:var(--accent-soft);color:var(--accent-strong);border-color:var(--accent)}@supports (color:color-mix(in lab, red, red)){.question-map button.answered{border-color:color-mix(in srgb, var(--accent) 40%, var(--line))}}.question-map button.current{background:var(--accent);color:#fff;border-color:var(--accent)}.source-note{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:var(--warning);align-items:flex-start;gap:12px;padding:19px;display:flex}.source-note div{color:var(--text)}.source-note p{color:var(--muted);margin:7px 0 10px;font-size:13px;line-height:1.45}.source-note a{color:var(--accent-strong);font-size:13px;font-weight:650}.result-summary{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);grid-template-columns:auto 1fr auto;align-items:center;gap:24px;padding:26px;display:grid}.result-summary h1{letter-spacing:-.035em;margin:3px 0 7px;font-size:34px}.result-summary p{color:var(--muted);margin:0}.result-mark{background:var(--accent-soft);width:112px;height:112px;color:var(--accent-strong);text-align:center;border-radius:50%;place-content:center;display:grid}.result-mark strong{letter-spacing:-.04em;font-size:30px}.result-mark span{color:var(--muted);font-size:13px}.review-list{gap:12px;display:grid}.review-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.review-item.correct{border-left:4px solid var(--success)}.review-item.wrong{border-left:4px solid var(--danger)}.review-item header{grid-template-columns:auto 1fr;align-items:flex-start;gap:12px;display:grid}.review-status{color:var(--success)}.review-item.wrong .review-status{color:var(--danger)}.review-item header span{color:var(--muted);font-size:13px}.review-item h3{margin:6px 0 0;font-size:18px;line-height:1.45}.review-answer{gap:4px;margin:18px 0 0 34px;display:grid}.review-answer span{color:var(--muted);font-size:13px}.explanation{background:var(--surface-soft);border-radius:11px;margin:17px 0 0 34px;padding:16px}.explanation span{color:var(--accent-strong);font-weight:680}.explanation p{color:var(--muted);margin:7px 0 0;line-height:1.55}.result-footer{justify-content:flex-end;gap:10px;margin-top:22px;display:flex}.group-grid{grid-template-columns:1.1fr .9fr;gap:14px;display:grid}.group-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);flex-direction:column;justify-content:space-between;gap:20px;min-height:210px;padding:22px;text-decoration:none;display:flex}.group-card:first-child{background:linear-gradient(140deg, var(--surface), var(--accent-soft))}.group-card:hover{border-color:var(--accent)}.group-card-top,.group-stats{justify-content:space-between;align-items:center;display:flex}.group-card h3{margin:0 0 5px;font-size:24px}.group-card p{color:var(--muted);margin:0}.group-stats{border-top:1px solid var(--line);color:var(--muted);padding-top:16px;font-size:14px}.group-stats strong{color:var(--text);font-size:23px}.teacher-columns{grid-template-columns:1.3fr .7fr}.action-panel{background:var(--accent-soft);flex-direction:column;justify-content:space-between;gap:24px;display:flex}.action-panel h2{margin:16px 0 7px}.action-panel p{color:var(--muted);margin:0;line-height:1.5}.action-icon{background:var(--surface);width:45px;height:45px;color:var(--accent-strong);border-radius:12px;place-items:center;display:grid}.group-header{align-items:center}.invite-strip{background:var(--accent-soft);border:1px solid var(--accent)}@supports (color:color-mix(in lab, red, red)){.invite-strip{border:1px solid color-mix(in srgb, var(--accent) 35%, var(--line))}}.invite-strip{border-radius:var(--radius);grid-template-columns:auto 1fr auto;align-items:center;gap:16px;padding:18px;display:grid}.invite-strip>div{gap:5px;min-width:0;display:grid}.invite-strip code{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.student-table-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow-x:auto}.student-table{border-collapse:collapse;width:100%;min-width:700px}.student-table th,.student-table td{text-align:left;border-bottom:1px solid var(--line);padding:17px 19px}.student-table th{color:var(--muted);font-size:13px;font-weight:650}.student-table tbody tr:last-child td{border-bottom:0}.student-name,.trend{align-items:center;gap:8px;display:inline-flex}.trend{color:var(--muted);font-size:13px}.header-actions{flex-wrap:wrap;gap:10px;display:flex}.copy-field{grid-template-columns:1fr auto;align-items:center;gap:8px;margin-bottom:20px;display:grid}.copy-field code{text-overflow:ellipsis;white-space:nowrap;background:var(--surface-soft);color:var(--muted);border-radius:10px;padding:12px;overflow:hidden}.editor-layout{grid-template-columns:.8fr 1.2fr;align-items:start;gap:14px;display:grid}.form-panel{position:sticky;top:92px}.full-button{width:100%}.join-page{place-items:center;min-height:calc(100dvh - 70px);display:grid}.join-container{max-width:580px}.join-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:clamp(26px,6vw,48px)}.join-card h1{letter-spacing:-.045em;margin:10px 0;font-size:clamp(34px,6vw,52px)}.join-card>p{color:var(--muted);line-height:1.55}.join-confirm{color:var(--success);align-items:center;gap:8px;padding:14px 0 22px;display:flex}.form-error{font-size:14px;color:var(--danger)!important;margin:-8px 0 16px!important}.schedule-list{gap:10px;display:grid}.schedule-card{border:1px solid var(--line);border-radius:12px;grid-template-columns:auto 1fr auto;align-items:center;gap:15px;min-height:88px;padding:14px;display:grid}.schedule-date{background:var(--accent-soft);width:52px;height:56px;color:var(--accent-strong);text-align:center;border-radius:10px;place-content:center;display:grid}.schedule-date strong{font-size:21px;line-height:1}.schedule-date span{text-transform:uppercase;margin-top:4px;font-size:12px}.schedule-card h3{margin:0 0 5px;font-size:16px}.schedule-card p{color:var(--muted);margin:0;font-size:13px;line-height:1.4}.schedule-edit{border:1px solid var(--accent);background:var(--accent-soft);border-radius:12px;padding:16px}.form-row{grid-template-columns:1fr 112px;gap:10px;display:grid}.sources-heading{justify-content:space-between;align-items:flex-end;gap:28px;display:flex}.sources-heading>div:first-child{max-width:690px}.checked-badge{color:var(--success);background:var(--surface);border:1px solid var(--line);border-radius:12px;flex:none;align-items:center;gap:9px;padding:12px 15px;font-size:12px;display:flex}.checked-badge span{color:var(--muted)}.checked-badge strong{color:var(--text);font-size:14px}.source-alert{background:var(--warning);align-items:flex-start;gap:13px;display:flex}@supports (color:color-mix(in lab, red, red)){.source-alert{background:color-mix(in srgb, var(--warning) 9%, var(--surface))}}.source-alert{border:1px solid var(--warning)}@supports (color:color-mix(in lab, red, red)){.source-alert{border:1px solid color-mix(in srgb, var(--warning) 32%, var(--line))}}.source-alert{color:var(--warning);border-radius:var(--radius);padding:18px}.source-alert div{color:var(--text)}.source-alert p{color:var(--muted);margin:6px 0 0;line-height:1.5}.source-list{gap:10px;display:grid}.source-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);grid-template-columns:auto 1fr auto;align-items:start;gap:16px;padding:20px;display:grid}.source-card-icon{background:var(--accent-soft);width:43px;height:43px;color:var(--accent-strong);border-radius:11px;place-items:center;display:grid}.source-card-title{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.source-card h3{margin:0;font-size:18px}.source-card p{color:var(--muted);margin:8px 0 12px;line-height:1.5}.source-meta{color:var(--muted);flex-wrap:wrap;gap:7px 14px;font-size:12px;display:flex}.status-pill{background:var(--accent-soft);color:var(--accent-strong);border-radius:999px;padding:4px 8px;font-size:11px;font-weight:700;display:inline-flex}.status-pill.project{background:var(--warning)}@supports (color:color-mix(in lab, red, red)){.status-pill.project{background:color-mix(in srgb, var(--warning) 12%, var(--surface))}}.status-pill.project{color:var(--warning)}.status-pill.official{background:var(--success)}@supports (color:color-mix(in lab, red, red)){.status-pill.official{background:color-mix(in srgb, var(--success) 12%, var(--surface))}}.status-pill.official{color:var(--success)}.source-policy{margin-top:14px}.policy-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.policy-grid>div{border-top:1px solid var(--line);padding-top:15px}.policy-grid p{color:var(--muted);margin:7px 0 0;font-size:14px;line-height:1.5}@media (width<=920px){.topnav .hide-mobile{display:none}.auth-layout{grid-template-columns:1fr;gap:34px;padding-block:40px}.auth-intro{max-width:680px}.quick-grid{grid-template-columns:1fr 1fr}.feature-metric{grid-column:1/-1}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-columns,.exam-layout,.group-grid,.teacher-columns,.editor-layout{grid-template-columns:1fr}.exam-sidebar{grid-template-columns:1fr 1fr}.form-panel{position:static}}@media (width<=640px){.container,.exam-container{width:min(100% - 24px,1220px)}.topbar{height:62px}.brand-text{display:none}.topnav{gap:2px}.topnav a,.topnav button{padding:8px}.auth-layout{padding-block:28px}.auth-intro h1{font-size:43px}.quick-grid,.subject-grid{grid-template-columns:1fr}.feature-metric{grid-column:auto}.dashboard-header{flex-direction:column;align-items:flex-start}.dashboard-header .primary-button{width:100%}.subject-hero{grid-template-columns:auto 1fr}.subject-result{text-align:left;border-top:1px solid var(--line);grid-column:1/-1;padding-top:14px}.subject-ticket{flex-direction:column;align-items:stretch}.topic-list,.exam-sidebar{grid-template-columns:1fr}.question-body{padding:26px 18px}.question-header{align-items:flex-start;padding:16px 18px}.question-header>div{flex-direction:column;align-items:flex-start;gap:3px}.question-footer{padding:14px}.question-footer .secondary-button{padding-inline:12px}.result-summary{grid-template-columns:1fr;align-items:flex-start}.result-mark{width:96px;height:96px}.result-summary .primary-button{width:100%}.review-answer,.explanation{margin-left:0}.result-footer{flex-direction:column}.invite-strip{grid-template-columns:auto 1fr}.invite-strip .secondary-button{grid-column:1/-1;width:100%}.auth-intro{display:none}.auth-layout{padding-block:20px 32px;display:block}.auth-panel{padding:18px}.prototype-note{align-items:start}.registration-steps li small{font-size:9px}.method-picker,.password-grid{grid-template-columns:1fr}.method-picker button{min-height:66px}.login-choice,.subject-group>div{grid-template-columns:1fr}.subject-groups{max-height:none;overflow:visible}.registration-actions{flex-direction:column-reverse;align-items:stretch}.registration-actions .primary-button,.registration-actions .secondary-button{width:100%}.registration-complete-actions{flex-direction:column-reverse;align-items:stretch}}@media (width<=720px){.sources-heading{flex-direction:column;align-items:flex-start}.checked-badge{width:100%}.source-card{grid-template-columns:auto 1fr}.source-card>.icon-button{grid-column:1/-1;width:100%}.policy-grid{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@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-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}