:root{
  --yellow:#f4c542;
  --gold:#d3a20f;
  --yellow-soft:#fff3bd;
  --bg:#fffdf7;
  --surface:#ffffff;
  --surface-2:#fff8df;
  --surface-3:#f7f3e8;
  --text:#171717;
  --muted:#666157;
  --border:#e8dfc3;
  --shadow:0 20px 65px rgba(44,35,0,.09);
  --radius:24px;
  --max:1180px;
  color-scheme:light;
}
html[data-theme="dark"]{
  --yellow:#f4c542;
  --gold:#f0c13f;
  --yellow-soft:#3b331b;
  --bg:#0f0f10;
  --surface:#171719;
  --surface-2:#201f1c;
  --surface-3:#1d1d1f;
  --text:#f6f3ea;
  --muted:#bcb5a4;
  --border:#353538;
  --shadow:0 24px 70px rgba(0,0,0,.34);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}
a{color:inherit;text-decoration:none}
button,a{font:inherit}
.skip-link{position:absolute;left:-9999px;top:0}
.skip-link:focus{left:16px;top:16px;z-index:100;background:var(--surface);padding:10px 14px;border:1px solid var(--border);border-radius:10px}
.shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px max(20px,calc((100vw - var(--max))/2));background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(20px);border-bottom:1px solid color-mix(in srgb,var(--border) 72%,transparent)}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:850;letter-spacing:-.03em;font-size:1.25rem}
.brand img{border-radius:12px}
.nav{display:flex;gap:25px;color:var(--muted);font-size:.93rem}
.nav a:hover{color:var(--text)}
.header-actions{display:flex;align-items:center;gap:10px}
.icon-button{width:40px;height:40px;border:1px solid var(--border);border-radius:12px;background:var(--surface);color:var(--text);cursor:pointer}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:14px;background:var(--yellow);color:#171717;font-weight:850;border:1px solid #dfb01c;box-shadow:0 10px 25px rgba(244,197,66,.16);transition:transform .16s ease,box-shadow .16s ease}
.button:hover{transform:translateY(-1px);box-shadow:0 14px 30px rgba(244,197,66,.23)}
.button-small{min-height:40px;padding:0 15px}
.button-ghost{background:var(--surface);color:var(--text);border-color:var(--border);box-shadow:none}
.text-link{display:inline-flex;align-items:center;gap:8px;font-weight:800;color:var(--text);margin-top:14px}.text-link span{color:var(--gold)}
.hero{display:grid;grid-template-columns:1.02fr .98fr;gap:68px;align-items:center;min-height:720px;padding-block:92px}
.eyebrow{text-transform:uppercase;font-size:.73rem;letter-spacing:.17em;color:var(--gold);font-weight:900;margin-bottom:14px}
.hero h1,.section h2,.cta h2{font-size:clamp(2.6rem,6vw,5.35rem);line-height:.98;letter-spacing:-.055em;margin:0}
.hero h1 span{color:var(--yellow)}
.hero-copy>p{font-size:1.12rem;color:var(--muted);max-width:640px}
.hero-actions{display:flex;gap:12px;margin:28px 0 18px}.microcopy{font-size:.87rem!important}
.study-preview{position:relative}
.study-preview:before{content:"";position:absolute;inset:15% -8% -10% 20%;background:radial-gradient(circle,var(--yellow),transparent 67%);filter:blur(72px);opacity:.2}
.workspace-window{position:relative;border:1px solid var(--border);border-radius:28px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow);transform:rotate(.75deg)}
.workspace-topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 18px;border-bottom:1px solid var(--border)}
.workspace-title{display:flex;align-items:center;gap:10px}.bell-dot{width:10px;height:10px;border-radius:50%;background:var(--yellow);box-shadow:0 0 0 5px color-mix(in srgb,var(--yellow) 16%,transparent)}
.status-pill{font-size:.76rem;color:var(--muted);border:1px solid var(--border);background:var(--surface-2);padding:5px 9px;border-radius:999px}
.workspace-body{display:grid;grid-template-columns:74px 1fr;min-height:410px}.subject-rail{padding:20px 14px;border-right:1px solid var(--border);display:flex;flex-direction:column;gap:13px;align-items:center}
.subject-icon{width:43px;height:43px;border-radius:13px;display:grid;place-items:center;background:var(--surface-2);font-weight:850;border:1px solid var(--border);font-size:.86rem}.subject-icon.active{background:var(--yellow);color:#171717;border-color:#dfb01c}
.workspace-main{padding:24px;display:flex;flex-direction:column;gap:13px}.workspace-heading{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:4px}.workspace-heading small,.card-kicker{font-size:.68rem;letter-spacing:.14em;color:var(--gold);font-weight:900}.workspace-heading h2{margin:3px 0 0;font-size:1.35rem;letter-spacing:-.03em}.member-count{font-size:.8rem;color:var(--muted)}
.study-card{border:1px solid var(--border);border-radius:16px;padding:15px 16px;background:var(--surface-2);display:grid;gap:3px}.study-card strong{font-size:.96rem}.study-card span:last-child{color:var(--muted);font-size:.83rem}.highlight-card{border-color:color-mix(in srgb,var(--yellow) 50%,var(--border));background:linear-gradient(135deg,color-mix(in srgb,var(--yellow) 14%,var(--surface)),var(--surface-2))}
.study-activity{display:flex;gap:11px;align-items:flex-start;padding:10px 2px}.activity-avatar{width:34px;height:34px;flex:0 0 34px;border-radius:50%;background:var(--surface-3);border:1px solid var(--border);display:grid;place-items:center;font-size:.8rem;font-weight:850}.study-activity div:last-child{display:grid;gap:2px}.study-activity strong{font-size:.83rem}.study-activity span{font-size:.84rem;color:var(--muted)}
.study-composer{margin-top:auto;border:1px solid var(--border);border-radius:14px;padding:12px 14px;color:var(--muted);display:flex;justify-content:space-between;font-size:.87rem}.study-composer span{color:var(--text)}
.purpose-strip{border-block:1px solid var(--border);background:var(--surface)}.purpose-grid{display:grid;grid-template-columns:repeat(4,1fr)}.purpose-grid>div{display:grid;grid-template-columns:auto 1fr;column-gap:10px;row-gap:1px;padding:19px 18px;border-right:1px solid var(--border)}.purpose-grid>div:last-child{border-right:0}.purpose-mark{grid-row:1/3;font-size:.7rem;color:var(--gold);font-weight:900;padding-top:2px}.purpose-grid strong{font-size:.88rem}.purpose-grid small{color:var(--muted)}
.section{padding-block:105px}.section-heading{max-width:800px;margin-bottom:42px}.section h2,.cta h2{font-size:clamp(2.2rem,4vw,4rem);line-height:1.02}.section-heading p,.class-copy p,.safety-copy p{color:var(--muted);font-size:1.05rem}.alternate{background:var(--surface);border-block:1px solid var(--border)}
.card-grid{display:grid;gap:16px}.card-grid.four{grid-template-columns:repeat(4,1fr)}.card-grid.three{grid-template-columns:repeat(3,1fr)}.feature-card,.mini-card{padding:26px;border:1px solid var(--border);border-radius:20px;background:var(--surface);box-shadow:0 8px 30px rgba(0,0,0,.02)}.alternate .mini-card{background:var(--bg)}.feature-icon{width:44px;height:44px;border-radius:13px;background:var(--surface-2);display:grid;place-items:center;color:var(--gold);font-weight:900;margin-bottom:24px}.feature-card h3,.mini-card h3{margin:0 0 8px;font-size:1.05rem}.feature-card p,.mini-card p{margin:0;color:var(--muted)}
.class-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:72px;align-items:center}.class-copy h2{font-size:clamp(2.2rem,4vw,4rem);line-height:1.02;letter-spacing:-.05em;margin:0}.subject-board{display:grid;grid-template-columns:1fr 1fr;gap:14px}.subject-card{min-height:168px;padding:22px;border:1px solid var(--border);border-radius:20px;background:var(--bg);display:flex;flex-direction:column;justify-content:flex-end;position:relative;overflow:hidden}.subject-card:before{content:"";position:absolute;width:100px;height:100px;border-radius:50%;right:-24px;top:-26px;background:var(--accent-card);opacity:.34}.subject-card span{font-size:.67rem;letter-spacing:.14em;color:var(--muted);font-weight:900}.subject-card strong{font-size:1.2rem;margin:5px 0 2px}.subject-card small{color:var(--muted)}.math-card{--accent-card:#f4c542}.science-card{--accent-card:#91d8b8}.english-card{--accent-card:#b8b2f3}.history-card{--accent-card:#dca887}
.safety-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;padding:44px;border-radius:28px;background:var(--surface);border:1px solid var(--border)}.safety-copy h2{font-size:clamp(2.2rem,4vw,3.7rem);line-height:1.02;letter-spacing:-.05em;margin:0}.safety-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.safety-list>div{display:flex;gap:12px;padding:18px;background:var(--surface-2);border:1px solid var(--border);border-radius:16px}.check{width:28px;height:28px;border-radius:50%;flex:0 0 28px;background:var(--yellow);color:#171717;display:grid;place-items:center;font-weight:900}.safety-list p{display:grid;gap:3px;margin:0}.safety-list small{color:var(--muted);line-height:1.45}
.feature-list-grid .mini-card{position:relative;min-height:170px}.mini-number{display:block;color:var(--gold);font-weight:900;font-size:.72rem;margin-bottom:26px}.feature-list-grid h3{font-size:1.1rem}
.roadmap-section{padding-top:80px}.roadmap-card{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;padding:44px;border-radius:28px;background:linear-gradient(135deg,var(--surface),color-mix(in srgb,var(--yellow) 8%,var(--surface)));border:1px solid color-mix(in srgb,var(--yellow) 36%,var(--border))}.roadmap-card h2{font-size:clamp(2rem,3vw,3.2rem);line-height:1.05;letter-spacing:-.045em;margin:0}.roadmap-card p{color:var(--muted)}.roadmap-items{display:grid;gap:10px}.roadmap-items>span{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:14px 16px;border:1px solid var(--border);border-radius:14px;background:var(--bg);font-weight:750}.roadmap-items small{text-transform:uppercase;font-size:.62rem;letter-spacing:.11em;color:var(--gold)}
.faq-shell{max-width:860px}.faq-shell details{border-top:1px solid var(--border);padding:22px 0}.faq-shell details:last-child{border-bottom:1px solid var(--border)}summary{font-weight:800;cursor:pointer}.faq-shell p{color:var(--muted);max-width:760px}
.cta{margin-block:90px;padding:46px;border-radius:28px;border:1px solid var(--border);background:var(--surface);display:flex;justify-content:space-between;align-items:center;gap:30px}.cta h2{max-width:790px}.footer{border-top:1px solid var(--border);padding:34px 0 40px}.footer-inner{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:28px}.footer-links{display:flex;justify-content:center;gap:20px;color:var(--muted)}.footer small{color:var(--muted)}
@media(max-width:980px){.nav{display:none}.hero{grid-template-columns:1fr;min-height:auto;padding-block:70px}.study-preview{max-width:720px}.purpose-grid{grid-template-columns:1fr 1fr}.purpose-grid>div:nth-child(2){border-right:0}.purpose-grid>div:nth-child(-n+2){border-bottom:1px solid var(--border)}.card-grid.four{grid-template-columns:repeat(2,1fr)}.class-layout,.safety-panel,.roadmap-card{grid-template-columns:1fr}.safety-list{grid-template-columns:1fr 1fr}.card-grid.three{grid-template-columns:repeat(2,1fr)}.cta{align-items:flex-start;flex-direction:column}.footer-inner{grid-template-columns:1fr;text-align:center}.footer-inner .brand,.footer-links{justify-content:center}}
@media(max-width:620px){.shell{width:min(calc(100% - 24px),var(--max))}.site-header{padding-inline:12px}.header-actions .button{display:none}.hero{padding-block:52px;gap:42px}.hero-actions{flex-direction:column;align-items:stretch}.workspace-body{grid-template-columns:58px 1fr}.subject-rail{padding-inline:8px}.workspace-main{padding:18px 14px}.workspace-heading{align-items:start;flex-direction:column}.purpose-grid,.card-grid.four,.card-grid.three,.subject-board,.safety-list{grid-template-columns:1fr}.purpose-grid>div{border-right:0!important;border-bottom:1px solid var(--border)}.purpose-grid>div:last-child{border-bottom:0}.section{padding-block:72px}.safety-panel,.roadmap-card{padding:28px}.cta{margin-block:60px;padding:28px}.section h2,.cta h2{font-size:2.35rem}.subject-card{min-height:140px}}
.policy-page{min-height:100vh}.policy-heading{margin-top:60px}.policy-copy{max-width:800px;color:var(--muted);font-size:1.02rem}