:root{--bg:#0b1220;--text:#e6edf5;--muted:#a3aab7;--surface:#0f172a;--line:rgba(255,255,255,.08);
--accent:#22d3ee;--accent2:#7c3aed;--ok:#22c55e;--warn:#f59e0b}
*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Arial,Helvetica,sans-serif;line-height:1.6}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.header{position:sticky;top:0;background:rgba(11,18,32,.7);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:50}
.header .row{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.nav a{color:var(--text);text-decoration:none;margin-left:18px;opacity:.9}.nav a:hover{color:var(--accent)}
.card{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.03));border:1px solid var(--line);border-radius:18px;padding:18px}
h1{font-size:32px;margin:.2em 0}h2{font-size:24px;margin:1em 0 .6em}
footer{background:#0b1020;color:var(--muted);border-top:1px solid var(--line);margin-top:40px}footer .row{padding:20px 0}
.grid{display:grid;gap:18px}
@media (max-width:900px){.grid-2{grid-template-columns:1fr}.grid-3{grid-template-columns:1fr 1fr}}@media (max-width:640px){.grid-3{grid-template-columns:1fr}}