:root{--bg:#0f172a;--card:#111827;--line:#243042;--text:#e5eefc;--muted:#a7b4cc;--accent:#38bdf8;--accent2:#0ea5e9}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:linear-gradient(180deg,#0b1220,#0f172a);color:var(--text);line-height:1.55}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
.topbar{position:sticky;top:0;background:rgba(11,18,32,.9);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.row{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{font-weight:700;color:#fff}.hero{padding:36px 0 10px}.lead{color:var(--muted);font-size:18px;max-width:800px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:16px 0 28px}
.card{background:rgba(17,24,39,.95);border:1px solid var(--line);border-radius:14px;padding:18px}
h1{font-size:clamp(30px,4.5vw,46px);line-height:1.1;margin:0 0 10px}h2{margin:24px 0 8px}h3{margin:0 0 8px}
.muted{color:var(--muted)}.small{font-size:13px}ul{margin:8px 0 0 18px;color:var(--muted)}
.btn{display:inline-block;padding:10px 14px;border-radius:10px;border:1px solid var(--line);background:#1e293b;color:#fff;font-weight:600;margin-right:8px}
.btn.primary{background:var(--accent2);color:#041018;border-color:transparent}
.footer{border-top:1px solid var(--line);margin-top:30px;padding:24px 0 40px}
section{margin:8px 0}