:root{color-scheme:light;--bg:#f5f7f4;--surface:#fff;--surface-2:#edf2ef;--surface-3:#e5ece8;--text:#14221f;--muted:#61706c;--faint:#83908c;--line:#dce5e0;--line-strong:#cbd8d2;--accent:#17745e;--accent-2:#2aa17f;--accent-soft:#dff1e9;--navy:#101a1c;--dark:#0d1213;--dark-2:#141b1c;--dark-3:#1b2424;--on-dark:#edf5f2;--on-dark-muted:#9aaba6;--danger:#a53844;--shadow:0 18px 60px rgba(26,55,46,.09),0 2px 8px rgba(26,55,46,.04);--radius:18px;--max:1180px;--focus:#259f7e;--selection:#cae9de}
:root[data-theme=dark]{color-scheme:dark;--bg:#0d1112;--surface:#14191a;--surface-2:#192021;--surface-3:#202829;--text:#edf3f1;--muted:#9ca9a5;--faint:#74817d;--line:#273032;--line-strong:#364143;--accent:#61d0ad;--accent-2:#7ce0bf;--accent-soft:#15372d;--navy:#0c1112;--dark:#090d0e;--dark-2:#111718;--dark-3:#182021;--on-dark:#edf5f2;--on-dark-muted:#9aaba6;--danger:#ff9ba6;--shadow:0 24px 80px rgba(0,0,0,.32),0 2px 10px rgba(0,0,0,.18);--focus:#65d7b5;--selection:#244b3e}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.6 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased;letter-spacing:-.006em}body.search-open,body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}img,svg{display:block}.icon{width:18px;height:18px;fill:none;flex:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}::selection{background:var(--selection)}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip-link{position:fixed;z-index:200;top:-70px;left:16px;background:var(--surface);border:1px solid var(--line);padding:10px 14px;border-radius:10px}.skip-link:focus{top:14px}.section-shell,.nav-shell,.footer-shell,.footer-bottom{width:min(var(--max),calc(100% - 42px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:90;background:color-mix(in srgb,var(--bg),transparent 8%);border-bottom:1px solid color-mix(in srgb,var(--line),transparent 20%);backdrop-filter:blur(18px)}.nav-shell{height:68px;display:flex;align-items:center;gap:32px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:780;letter-spacing:-.03em}.brand img{border-radius:10px}.brand span{line-height:1.1}.brand small{display:block;margin-top:4px;color:var(--faint);font-size:9px;text-transform:uppercase;letter-spacing:.12em;font-weight:650}.desktop-nav{display:flex;align-items:center;gap:25px;margin-left:18px}.desktop-nav a{font-size:12.5px;color:var(--muted);font-weight:620}.desktop-nav a:hover{color:var(--text)}.nav-actions{margin-left:auto;display:flex;align-items:center;gap:6px}.icon-button{width:38px;height:38px;display:grid;place-items:center;border:0;border-radius:10px;background:transparent;color:var(--muted)}.icon-button:hover{background:var(--surface-2);color:var(--text)}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:9px 14px;border-radius:11px;border:1px solid transparent;font-weight:680;font-size:12.5px;transition:transform .16s ease,background .16s ease,border-color .16s ease}.button:hover{transform:translateY(-1px)}.button-primary{background:var(--accent);color:#07120f;border-color:var(--accent)}:root:not([data-theme=dark]) .button-primary{color:#fff}.button-primary:hover{background:var(--accent-2)}.button-secondary{background:var(--surface);border-color:var(--line);color:var(--text)}.button-secondary:hover{border-color:var(--line-strong);background:var(--surface-2)}.button-large{min-height:47px;padding:12px 17px;font-size:13.5px;border-radius:13px}.button-on-dark{background:#e7f4ef;color:#10231e;border-color:#e7f4ef}.button-dark-secondary{background:#1c2525;color:#dbe6e2;border-color:#2d3838}.full{width:100%}.menu-toggle{display:none}.mobile-nav{border-top:1px solid var(--line);background:var(--surface);padding:12px 20px 20px}.mobile-nav a{display:flex;align-items:center;justify-content:space-between;padding:12px;border-radius:10px;font-weight:650}.mobile-nav a:hover{background:var(--surface-2)}.mobile-chat{margin-top:7px;background:var(--accent-soft);color:var(--accent)}
.hero{overflow:hidden;border-bottom:1px solid var(--line);background:radial-gradient(circle at 77% 22%,color-mix(in srgb,var(--accent),transparent 88%),transparent 28%),var(--bg)}.hero-shell{width:min(1280px,calc(100% - 42px));margin:auto;min-height:690px;display:grid;grid-template-columns:minmax(0,.94fr) minmax(500px,1.06fr);gap:56px;align-items:center;padding:86px 0 80px}.eyebrow,.micro-label{margin:0 0 13px;color:var(--accent);font-size:10px;font-weight:800;letter-spacing:.15em;text-transform:uppercase}.hero h1,.page-hero h1,.subject-hero h1{margin:0;max-width:850px;font-size:clamp(3rem,5.5vw,5.9rem);line-height:.98;letter-spacing:-.067em;font-weight:760}.hero h1 span{color:var(--muted);font-weight:620}.hero-lead{max-width:670px;margin:24px 0 0;color:var(--muted);font-size:clamp(16px,1.5vw,19px);line-height:1.65}.hero-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:29px}.hero-trust{display:flex;flex-wrap:wrap;gap:18px;margin-top:27px;color:var(--faint);font-size:11.5px}.hero-trust span{display:flex;align-items:center;gap:6px}.hero-trust .icon{width:14px;height:14px;color:var(--accent)}.hero-stage{perspective:1200px}.stage-window{background:var(--surface);border:1px solid var(--line);border-radius:22px;box-shadow:0 40px 110px rgba(19,45,38,.15);overflow:hidden;transform:rotateY(-2.4deg) rotateX(1.2deg)}:root[data-theme=dark] .stage-window{box-shadow:0 40px 120px rgba(0,0,0,.44)}.stage-bar{height:45px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:6px;padding:0 15px;color:var(--faint);font-size:10.5px}.stage-bar>span:last-child{margin-left:7px}.stage-dot{width:7px;height:7px;border-radius:50%;background:var(--line-strong)}.stage-body{display:grid;grid-template-columns:1fr 185px;min-height:430px}.stage-main{padding:31px}.stage-main h2{font-size:1.75rem;letter-spacing:-.04em;margin:0 0 24px}.stage-action{display:grid;grid-template-columns:31px 1fr 18px;gap:11px;align-items:center;border-top:1px solid var(--line);padding:17px 2px}.stage-action>.icon:first-child{width:20px;height:20px;color:var(--accent)}.stage-action strong{display:block;font-size:13px}.stage-action small{display:block;color:var(--muted);font-size:11px;margin-top:2px}.stage-action:hover strong{color:var(--accent)}.stage-side{background:var(--surface-2);border-left:1px solid var(--line);padding:28px 20px}.stage-side>strong{display:block;font-size:2.5rem;letter-spacing:-.06em;line-height:1}.stage-side>span{display:block;color:var(--muted);font-size:11px;margin:10px 0 18px}.stage-side>a{color:var(--accent);font-size:11px;font-weight:700}.stage-side hr{border:0;border-top:1px solid var(--line);margin:26px 0}.home-task-preview{display:flex;align-items:flex-start;gap:8px;color:var(--muted);font-size:11px;margin:0 0 16px}.task-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);margin-top:5px;flex:none}.quick-search-section{width:min(900px,calc(100% - 42px));margin:-28px auto 0;position:relative;z-index:3}.quick-search{width:100%;display:grid;grid-template-columns:22px 1fr auto;gap:13px;align-items:center;text-align:left;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:var(--shadow);padding:14px 16px;color:var(--muted)}.quick-search strong{display:block;color:var(--text);font-size:12.5px}.quick-search small{font-size:10.5px}.quick-search kbd{border:1px solid var(--line);background:var(--surface-2);padding:2px 6px;border-radius:6px;font:10px ui-monospace,monospace}.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}.reveal.revealed{opacity:1;transform:none}
.section{padding:92px 0}.section-soft{background:var(--surface-2);border-block:1px solid var(--line)}.section-dark{background:var(--dark);color:var(--on-dark)}.section-heading{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:34px}.section-heading h2,.tool-intro h2,.resource-callout h2,.final-cta h2,.subject-cta h2,.two-column-copy h2{margin:0;font-size:clamp(2rem,3.5vw,3.5rem);line-height:1.05;letter-spacing:-.055em}.section-heading p:not(.eyebrow),.tool-intro p:not(.eyebrow){max-width:690px;color:var(--muted);margin:12px 0 0}.section-heading.light p:not(.eyebrow){color:var(--on-dark-muted)}.text-link{display:inline-flex;align-items:center;gap:5px;color:var(--accent);font-weight:700;font-size:12px;white-space:nowrap}.subject-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.subject-card{position:relative;min-height:250px;border:1px solid var(--line);border-radius:17px;background:var(--surface);padding:20px;overflow:hidden;display:flex;flex-direction:column;transition:transform .17s ease,border-color .17s ease,box-shadow .17s ease}.subject-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow)}.subject-icon{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;margin-bottom:38px;background:var(--accent-soft);color:var(--accent)}.subject-card small{display:block;color:var(--faint);font-size:9.5px;text-transform:uppercase;letter-spacing:.08em;margin-bottom:5px}.subject-card strong{font-size:18px;letter-spacing:-.03em}.subject-card p{font-size:11.5px;color:var(--muted);line-height:1.55;margin:7px 0 0}.subject-arrow{position:absolute;right:16px;top:17px;color:var(--faint)}.subject-card:hover .subject-arrow{color:var(--accent)}.subject-card.blue .subject-icon{background:#e6eef7;color:#386c9c}.subject-card.sand .subject-icon{background:#f3ead9;color:#866226}.subject-card.lavender .subject-icon{background:#eee9f7;color:#705994}:root[data-theme=dark] .subject-card.blue .subject-icon,:root[data-theme=dark] .subject-card.sand .subject-icon,:root[data-theme=dark] .subject-card.lavender .subject-icon{background:var(--surface-2);color:var(--accent)}
.chatctm-feature{background:var(--dark);color:var(--on-dark);padding:105px 0;overflow:hidden}.chatctm-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:80px;align-items:center}.chatctm-lockup{display:inline-flex;align-items:center;gap:10px;margin-bottom:58px}.chatctm-lockup img{border-radius:11px}.chatctm-lockup strong{display:block;font-size:14px}.chatctm-lockup small{display:block;color:var(--on-dark-muted);font-size:9.5px;text-transform:uppercase;letter-spacing:.1em}.chatctm-copy h2{margin:0;font-size:clamp(2.6rem,4.5vw,4.8rem);line-height:1;letter-spacing:-.065em}.chatctm-copy>p:not(.eyebrow){color:var(--on-dark-muted);max-width:590px;font-size:16px;margin:21px 0}.feature-list{display:grid;gap:10px;margin:27px 0 34px}.feature-list span{display:flex;align-items:center;gap:9px;color:#cbd8d4;font-size:12px}.feature-list .icon{color:#68d4b2}.chat-demo{background:#111718;border:1px solid #283234;border-radius:22px;padding:28px;box-shadow:0 50px 140px #0006;transform:rotate(1.5deg)}.demo-question{margin-left:auto;max-width:78%;background:#212a2a;border:1px solid #2c3737;border-radius:18px 18px 4px 18px;padding:12px 15px;font-size:12px}.demo-answer{margin-top:28px}.demo-brand{display:flex;align-items:center;gap:8px;font-size:11px}.demo-mark{width:24px;height:24px;border-radius:8px;background:#dff2eb;color:#153f33;display:grid;place-items:center;font-weight:850}.demo-answer p{color:#c2ceca;line-height:1.65;font-size:13px}.demo-math{padding:21px;text-align:center;font:600 22px Georgia,serif;border-block:1px solid #263031;margin:18px 0}.demo-badges{display:flex;gap:7px}.demo-badges span{border:1px solid #2c3937;border-radius:999px;padding:4px 8px;color:#8fd4bd;font-size:9.5px}
.tool-preview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.tool-preview{border-top:1px solid var(--line);padding:22px 2px 8px}.tool-glyph{width:38px;height:38px;border:1px solid var(--line);border-radius:11px;display:grid;place-items:center;color:var(--accent);font-weight:800;margin-bottom:34px}.tool-preview strong{font-size:15px}.tool-preview p{margin:5px 0 0;color:var(--muted);font-size:11.5px}.tool-preview:hover strong{color:var(--accent)}.split-feature{display:grid;grid-template-columns:1.1fr .9fr;gap:80px;align-items:center}.split-feature>div>p:not(.eyebrow){color:var(--muted);max-width:680px}.workflow{margin-top:34px;display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.workflow>div{padding:18px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.workflow span{font-size:9px;color:var(--accent);font-weight:800}.workflow strong{display:block;margin-top:12px}.workflow p{font-size:11px;color:var(--muted);margin:4px 0}.planner-preview{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:25px;box-shadow:var(--shadow)}.planner-preview h3{font-size:1.5rem;letter-spacing:-.04em}.preview-task{display:flex;gap:10px;align-items:center;padding:13px 0;border-top:1px solid var(--line)}.preview-task strong{font-size:12px}.preview-task small{display:block;color:var(--muted);font-size:10px}.check-circle{width:19px;height:19px;border-radius:50%;border:1px solid var(--line-strong);display:grid;place-items:center;color:var(--accent);font-size:10px}.preview-task.done{opacity:.55}.resource-callout{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.resource-callout>div:first-child>p:not(.eyebrow){color:var(--muted)}.resource-actions{border-top:1px solid var(--line)}.resource-action{display:grid;grid-template-columns:22px 1fr 18px;gap:14px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}.resource-action>.icon:first-child{color:var(--accent)}.resource-action strong{font-size:13px}.resource-action small{display:block;color:var(--muted);font-size:10.5px}.resource-action:hover strong{color:var(--accent)}.final-cta{padding:70px 0;border-top:1px solid var(--line)}.final-cta .section-shell{display:grid;grid-template-columns:60px 1fr auto;gap:24px;align-items:center}.final-mark{width:52px;height:52px;border-radius:14px;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:24px;font-weight:900}.final-cta h2{font-size:clamp(1.8rem,3vw,3rem)}.final-cta .eyebrow{margin-bottom:7px}
.floating-chat{position:fixed;z-index:60;right:22px;bottom:22px;display:flex;align-items:center;gap:8px;background:var(--text);color:var(--bg);border-radius:999px;padding:11px 14px;font-size:11.5px;font-weight:760;box-shadow:0 16px 60px #0003}.floating-chat:hover{transform:translateY(-2px)}:root[data-theme=dark] .floating-chat{background:#e8f2ef;color:#111817}.search-backdrop{position:fixed;z-index:180;inset:0;background:rgba(6,11,10,.55);backdrop-filter:blur(8px);padding:11vh 18px 30px}.search-palette{width:min(680px,100%);max-height:75vh;overflow:auto;margin:auto;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:0 50px 140px #0006}.search-field{display:grid;grid-template-columns:22px 1fr auto;align-items:center;gap:10px;padding:15px;border-bottom:1px solid var(--line)}.search-field input{border:0;background:transparent;outline:0;font-size:15px;min-width:0}.search-field kbd{font:10px ui-monospace,monospace;color:var(--faint)}.search-palette-head{display:flex;justify-content:space-between;padding:12px 16px 7px;color:var(--faint);font-size:10px;text-transform:uppercase;letter-spacing:.08em}.search-palette-results{padding:5px 8px 10px}.search-palette-results a{display:flex;align-items:center;justify-content:space-between;padding:10px;border-radius:9px}.search-palette-results a:hover{background:var(--surface-2)}.search-palette-results strong{display:block;font-size:12.5px}.search-palette-results small{display:block;color:var(--muted);font-size:10.5px}.search-empty{padding:18px;color:var(--muted)}
.page-hero,.subject-hero{border-bottom:1px solid var(--line);background:var(--bg)}.page-hero.compact{padding:95px 0 72px}.page-hero h1{font-size:clamp(3rem,5vw,5.4rem);max-width:1000px}.page-hero .section-shell>p:last-child{max-width:720px;color:var(--muted);font-size:16px}.anchor-chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:28px}.anchor-chips a{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:7px 10px;font-size:11px}.subject-hero{padding:32px 0 78px}.breadcrumb{font-size:11px;color:var(--muted)}.subject-hero .section-shell>span{margin:0 5px;color:var(--faint);font-size:11px}.subject-hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:70px;align-items:end;margin-top:62px}.subject-big-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:14px;background:var(--accent-soft);color:var(--accent);margin-bottom:26px}.subject-hero h1{font-size:clamp(3.3rem,6vw,6rem)}.subject-hero-grid>div>p:not(.eyebrow){max-width:700px;color:var(--muted);font-size:16px}.subject-quick{border-left:1px solid var(--line);padding-left:28px}.subject-quick ol{margin:0;padding-left:18px;color:var(--muted);font-size:12px}.subject-quick li{margin:9px 0}.topic-list{border-top:1px solid var(--line)}.topic-card{display:grid;grid-template-columns:70px 1fr;gap:20px;padding:30px 0;border-bottom:1px solid var(--line)}.topic-number{font:700 10px ui-monospace,monospace;color:var(--accent);padding-top:6px}.topic-card h3{margin:0;font-size:1.35rem;letter-spacing:-.035em}.topic-card p{color:var(--muted);max-width:780px}.topic-card ul{padding-left:18px;columns:2;column-gap:50px;color:var(--muted);font-size:12px}.topic-card li{break-inside:avoid;margin:6px 0}.topic-actions{margin-top:14px}.subject-cta{border-top:1px solid var(--line);padding:65px 0}.subject-cta .section-shell{display:flex;align-items:center;justify-content:space-between;gap:40px}.subject-cta p:not(.eyebrow){color:var(--muted);max-width:650px}
.tool-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:80px;align-items:center}.tool-layout.reverse{grid-template-columns:1.2fr .8fr}.functional-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:23px;box-shadow:0 1px 0 rgba(255,255,255,.03)}.functional-card h3{margin:0 0 5px;font-size:1.3rem;letter-spacing:-.035em}.functional-card>p{color:var(--muted);font-size:12px}.functional-card label{display:grid;gap:5px;margin-top:11px;color:var(--muted);font-size:10.5px;font-weight:650}.functional-card input,.functional-card select,.functional-card textarea{width:100%;border:1px solid var(--line);border-radius:10px;background:var(--bg);padding:10px 11px;outline:none;color:var(--text)}.functional-card input:focus,.functional-card select:focus,.functional-card textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent),transparent 87%)}.timer-card{text-align:center;padding:38px}.timer-mode{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--faint)}.big-timer{display:block;font-size:clamp(4.5rem,9vw,7.2rem);line-height:1;letter-spacing:-.075em;font-weight:780;margin:24px 0}.timer-progress{height:4px;border-radius:999px;background:var(--surface-2);overflow:hidden}.timer-progress span{display:block;width:0;height:100%;background:var(--accent)}.button-row{display:flex;gap:8px;margin-top:18px}.button-row>*{flex:1}.timer-presets{display:flex;justify-content:center;gap:6px;margin-top:14px}.timer-presets button{border:0;background:transparent;color:var(--muted);font-size:10px;padding:6px;border-radius:7px}.timer-presets button:hover{background:var(--surface-2);color:var(--text)}.tool-card-grid{display:grid;gap:12px}.tool-card-grid.three{grid-template-columns:repeat(3,1fr)}.tool-card-grid.two{grid-template-columns:repeat(2,1fr)}.result-box{display:block;min-height:60px;margin-top:12px;border:1px solid var(--line);background:var(--surface-2);border-radius:11px;padding:12px;color:var(--muted);font-size:12px}.gpa-rows{display:grid;gap:6px}.gpa-row{display:grid;grid-template-columns:1fr .75fr 28px;gap:6px;align-items:end}.gpa-row label{margin:0}.gpa-row button{width:28px;height:38px;border:0;background:transparent;color:var(--faint);font-size:18px}.converter-grid,.two-inputs{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.converter-grid label{margin:0}.swap-button{border:0;background:transparent;color:var(--accent);font-size:11px;margin:14px auto 0;display:block}.converter-result{display:block;text-align:center;font-size:1.4rem;font-weight:720;letter-spacing:-.03em;padding:22px 0 4px}.dark-card{background:var(--dark-2);border-color:#293333;color:var(--on-dark)}.dark-card>p,.dark-card .local-meta{color:var(--on-dark-muted)}.dark-card input,.dark-card textarea{background:#0e1415;border-color:#2a3435;color:var(--on-dark)}.study-card{width:100%;min-height:180px;border:1px solid #344140;border-radius:15px;background:#e5f1ed;color:#12241f;margin-top:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:22px}.study-card span{font-size:1.35rem;font-weight:750}.study-card small{margin-top:12px;color:#577068}.local-meta{font-size:10px;margin-top:10px}.citation-output{display:block;min-height:90px;border:1px solid var(--line);background:var(--surface-2);border-radius:11px;padding:13px;margin:12px 0;font-size:12px;overflow-wrap:anywhere}.planner-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:12px}.card-heading{display:flex;justify-content:space-between;align-items:start}.card-heading p{margin:2px 0 0;color:var(--muted);font-size:10px}.text-button{border:0;background:transparent;color:var(--accent);font-size:10.5px}.task-list{display:grid;gap:7px;margin-top:14px}.task-row{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;border-top:1px solid var(--line);padding:11px 0}.task-row strong{font-size:12px}.task-row small{display:block;color:var(--muted);font-size:10px}.task-row.done strong{text-decoration:line-through;color:var(--muted)}.task-delete{border:0;background:transparent;color:var(--faint);font-size:18px}.empty-state{color:var(--muted);font-size:12px;text-align:center;padding:35px}
.reference-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.reference-sheet{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px}.sheet-kicker{font-size:9px;font-weight:800;color:var(--accent);letter-spacing:.12em}.reference-sheet h3{font-size:1.25rem;margin:10px 0 20px}.reference-sheet dl{margin:0}.reference-sheet dl div{padding:10px 0;border-top:1px solid var(--line)}.reference-sheet dt{font-size:9.5px;color:var(--faint)}.reference-sheet dd{margin:3px 0 0;font-size:11px;font-weight:650}.reference-sheet ul{padding-left:16px;color:var(--muted);font-size:11px}.reference-sheet>a{display:inline-block;margin-top:18px;color:var(--accent);font-size:10.5px;font-weight:700}.trusted-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.trusted-card{display:grid;grid-template-columns:38px 1fr;gap:12px;background:var(--surface);border:1px solid var(--line);border-radius:13px;padding:14px}.trusted-card:hover{border-color:var(--line-strong)}.trusted-mark{width:38px;height:38px;border-radius:10px;background:var(--surface-2);display:grid;place-items:center;color:var(--accent);font-weight:800}.trusted-card strong{font-size:12px}.trusted-card p{font-size:10.5px;color:var(--muted);margin:3px 0}.trusted-card small{font-size:9.5px;color:var(--faint)}.research-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px}.research-grid>div>p:not(.eyebrow){color:var(--muted)}.research-steps{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}.research-steps li{display:grid;grid-template-columns:32px 1fr;gap:12px;padding:17px 0;border-bottom:1px solid var(--line)}.research-steps>li>span{color:var(--accent);font:700 10px ui-monospace,monospace}.research-steps strong{font-size:12px}.research-steps p{color:var(--muted);font-size:10.5px;margin:3px 0}
.strategy-grid{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.strategy-grid article{padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.strategy-grid article>span{font:700 10px ui-monospace,monospace;color:var(--accent)}.strategy-grid h2{font-size:2rem;letter-spacing:-.045em;margin:28px 0 10px}.strategy-grid p{color:var(--muted)}.strategy-do{margin-top:20px;border-left:2px solid var(--accent);padding-left:13px;font-size:11.5px;color:var(--muted)}.study-plan{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.study-plan h2{font-size:clamp(2.2rem,4vw,4rem);letter-spacing:-.055em;line-height:1.05;margin:0}.study-plan>div>p:not(.eyebrow){color:var(--on-dark-muted)}.plan-example{border:1px solid #2b3636;border-radius:17px;padding:25px;background:#111718}.plan-example span{display:block;color:#7e918b;font-size:9px;text-transform:uppercase;letter-spacing:.1em;margin:10px 0}.plan-example del{display:block;color:#8b9a96}.plan-example strong{display:block;font-size:1.25rem;line-height:1.45}.two-column-copy{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.two-column-copy>div:last-child>p{color:var(--muted)}.check-list{padding:0;list-style:none;margin:20px 0}.check-list li{border-top:1px solid var(--line);padding:10px 0;font-size:12px}.check-list li:before{content:'✓';color:var(--accent);margin-right:9px;font-weight:800}
.site-footer{background:var(--dark);color:var(--on-dark);padding:58px 0 0}.footer-shell{display:grid;grid-template-columns:2fr 1fr 1fr;gap:60px;padding-bottom:40px}.footer-main p{max-width:460px;color:var(--on-dark-muted);font-size:11.5px}.footer-shell>div:not(.footer-main){display:grid;align-content:start;gap:8px}.footer-shell>div>strong{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:#dce8e4;margin-bottom:6px}.footer-shell>div>a:not(.brand){color:var(--on-dark-muted);font-size:11px}.footer-shell>div>a:hover{color:var(--on-dark)}.footer-bottom{border-top:1px solid #222b2c;display:flex;justify-content:space-between;gap:20px;padding-block:17px 26px;color:#70817c;font-size:9.5px}.noscript{position:fixed;bottom:0;left:0;right:0;z-index:300;background:#fff2c7;color:#3a2d0b;padding:10px;text-align:center}.toast{position:fixed;z-index:300;left:50%;bottom:24px;transform:translateX(-50%);background:var(--text);color:var(--bg);border-radius:999px;padding:9px 13px;font-size:11px;box-shadow:var(--shadow)}
@media(max-width:1050px){.desktop-nav{display:none}.menu-toggle{display:grid}.hero-shell{grid-template-columns:1fr;padding-top:70px}.hero-copy{max-width:800px}.hero-stage{max-width:760px}.subject-grid{grid-template-columns:repeat(3,1fr)}.chatctm-grid,.split-feature,.resource-callout,.tool-layout,.tool-layout.reverse,.research-grid,.study-plan,.two-column-copy{grid-template-columns:1fr;gap:45px}.tool-card-grid.three{grid-template-columns:1fr 1fr}.reference-grid{grid-template-columns:1fr 1fr}.subject-hero-grid{grid-template-columns:1fr}.subject-quick{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.chat-demo{transform:none;max-width:700px}.nav-chat{display:none}}
@media(max-width:760px){.section-shell,.nav-shell,.footer-shell,.footer-bottom,.hero-shell{width:calc(100% - 28px)}.nav-shell{height:60px}.brand small{display:none}.nav-actions{gap:2px}.hero-shell{min-height:auto;padding:62px 0 66px;gap:45px}.hero h1,.page-hero h1,.subject-hero h1{font-size:clamp(2.7rem,13vw,4.8rem)}.hero-lead{font-size:15px}.hero-trust{display:grid;gap:8px}.stage-window{transform:none;border-radius:16px}.stage-body{grid-template-columns:1fr}.stage-side{border-left:0;border-top:1px solid var(--line)}.quick-search-section{width:calc(100% - 28px)}.quick-search kbd{display:none}.section{padding:66px 0}.section-heading{display:block}.section-heading>.text-link{margin-top:14px}.subject-grid,.tool-preview-grid,.tool-card-grid.three,.tool-card-grid.two,.reference-grid,.trusted-grid{grid-template-columns:1fr}.subject-card{min-height:180px}.subject-icon{margin-bottom:25px}.chatctm-feature{padding:72px 0}.chatctm-lockup{margin-bottom:36px}.workflow,.strategy-grid{grid-template-columns:1fr}.resource-callout{gap:35px}.final-cta .section-shell{grid-template-columns:44px 1fr}.final-cta .button{grid-column:1/-1}.floating-chat{right:12px;bottom:12px;padding:10px}.floating-chat span{display:none}.page-hero.compact{padding:66px 0 50px}.subject-hero{padding-bottom:55px}.subject-hero-grid{margin-top:40px}.topic-card{grid-template-columns:38px 1fr}.topic-card ul{columns:1}.subject-cta .section-shell{align-items:flex-start;flex-direction:column}.planner-grid,.converter-grid,.two-inputs{grid-template-columns:1fr}.timer-card{padding:28px 18px}.gpa-row{grid-template-columns:1fr 1fr 26px}.footer-shell{grid-template-columns:1fr 1fr;gap:32px}.footer-main{grid-column:1/-1}.footer-bottom{display:grid}.search-backdrop{padding-top:8vh}.search-palette{border-radius:14px}.reveal{opacity:1;transform:none}}
@media(max-width:430px){.hero-actions,.button-row{display:grid}.hero-actions>.button,.button-row>.button{width:100%}.stage-main{padding:24px 19px}.stage-side{padding:22px 19px}.chat-demo{padding:18px}.demo-question{max-width:90%}.tool-preview-grid{gap:18px}.footer-shell{grid-template-columns:1fr}.footer-main{grid-column:auto}.anchor-chips{gap:5px}.topic-card{grid-template-columns:1fr}.topic-number{padding:0}.big-timer{font-size:4.3rem}.timer-presets{flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.button,.subject-card{transition:none}}