:root{--bg:#020617;--card:#0b1324;--line:#1e293b;--txt:#e2e8f0;--mut:#94a3b8;--acc:#22d3ee;--acc2:#0ea5e9}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(1200px 600px at 80% -10%,#0c4a6e55,transparent),var(--bg);color:var(--txt);font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.55}
a{color:inherit;text-decoration:none}.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
header{border-bottom:1px solid var(--line);position:sticky;top:0;background:#020617cc;backdrop-filter:blur(10px);z-index:5}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}.logo small{color:var(--acc);font-weight:600;letter-spacing:.12em;font-size:12px}
nav a{color:var(--mut);margin-left:24px;font-size:14px}nav a:hover{color:#fff}
.hero{padding:72px 0 40px}.kicker{color:var(--acc);font-weight:600;letter-spacing:.14em;font-size:12px;text-transform:uppercase}
h1{font-size:48px;line-height:1.1;margin:12px 0 16px;letter-spacing:-.02em}h2{font-size:26px;margin:48px 0 18px}
.lead{color:var(--mut);font-size:18px;max-width:640px}
.btn{display:inline-block;background:var(--acc);color:#012;font-weight:600;padding:12px 20px;border-radius:10px;margin-top:20px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-3px);border-color:#22d3ee66}.card .body{padding:16px 18px}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}.tag{font-size:12px;color:var(--acc);font-weight:600}
.card h3{margin:6px 0;font-size:17px}.card p{margin:0;color:var(--mut);font-size:14px}
.soon{opacity:.55}.soon .ph{aspect-ratio:16/9;background:linear-gradient(135deg,#0f172a,#082f49);display:grid;place-items:center;color:var(--mut);font-size:13px}
.track{margin-bottom:8px}.teachers{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px}
.teacher{display:flex;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}
.teacher img{width:96px;height:96px;border-radius:50%;border:3px solid var(--acc);object-fit:cover;flex:none}
.teacher h3{margin:0}.teacher .role{color:var(--acc);font-size:13px;font-weight:600}.teacher p{color:var(--mut);font-size:14px;margin:8px 0 0}
footer{border-top:1px solid var(--line);margin-top:72px;padding:28px 0;color:var(--mut);font-size:13px}
.lesson{display:grid;grid-template-columns:1fr 340px;gap:24px;padding:32px 0}@media(max-width:900px){.lesson{grid-template-columns:1fr}h1{font-size:34px}}
video{width:100%;border-radius:14px;border:1px solid var(--line);background:#000;display:block}
.side{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;max-height:640px;overflow:auto}
.side h4{margin:4px 0 12px;font-size:13px;letter-spacing:.12em;color:var(--mut);text-transform:uppercase}
.tr p{margin:0 0 6px;padding:8px 10px;border-radius:8px;cursor:pointer;font-size:14px;color:var(--mut)}.tr p:hover{background:#0f1b33}
.tr p.on{background:#082f49;color:#fff}.tr span{color:var(--acc);font-size:12px;font-variant-numeric:tabular-nums;margin-right:8px}
.meta{display:flex;align-items:center;gap:12px;margin:16px 0}.meta img{width:44px;height:44px;border-radius:50%;border:2px solid var(--acc)}
.pill{display:inline-block;border:1px solid var(--line);border-radius:99px;padding:4px 10px;font-size:12px;color:var(--mut);margin-right:6px}
.next{margin-top:18px;display:flex;justify-content:space-between;gap:12px}