:root{--bg:#f5f6f8;--surface:#fff;--line:#e5e7eb;--ink:#0f172a;--muted:#4b5563;--blue:#2563eb;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--bg:#0b0f17;--surface:#121826;--line:#243049;--ink:#e6ebf5;--muted:#a9b4c6;--blue:#60a5fa;color-scheme:dark}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:500 16px/1.65 Inter,ui-sans-serif,system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--blue)}
.wrap{max-width:920px;margin:0 auto;padding:0 16px}
header{border-bottom:1px solid var(--line);background:var(--surface)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);text-decoration:none}
.logo img{width:32px;height:32px}.logo span{color:var(--blue)}
.btn{display:inline-block;background:#2563eb;color:#fff;text-decoration:none;font-weight:700;padding:10px 18px;border-radius:10px}
.btn.secondary{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.hero{padding:72px 0 40px}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.15;margin:0 0 16px;font-weight:800;letter-spacing:-.02em}
.hero p{font-size:18px;color:var(--muted);max-width:640px;margin:0 0 28px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin:24px 0 56px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px}
.card h3{margin:0 0 6px;font-size:17px;font-weight:700}.card p{margin:0;color:var(--muted);font-size:15px}
.doc{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:32px clamp(18px,4vw,40px);margin:32px 0}
.doc h1{font-size:30px;margin:0 0 4px;font-weight:800}.doc h2{font-size:20px;margin:32px 0 8px;font-weight:700}
.doc .meta{color:var(--muted);font-size:14px;margin-bottom:24px}
.doc li{margin:4px 0}
.lang{border-top:2px dashed var(--line);margin-top:40px;padding-top:8px}
footer{border-top:1px solid var(--line);padding:24px 0 40px;color:var(--muted);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between}