:root{--bg:#f5f5fa;--card:#fff;--text:#1c1c1e;--sub:#6e6e73;--tint:#5e5ce6}
@media (prefers-color-scheme:dark){:root{--bg:#000;--card:#1c1c1e;--text:#f2f2f7;--sub:#98989f;--tint:#7d7aff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:17px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:24px 16px 64px}header{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-bottom:24px}
.brand{font-weight:700;font-size:20px;color:var(--text);text-decoration:none}nav a,.langs a{color:var(--tint);text-decoration:none;margin-right:14px}
.langs a.on{color:var(--text);font-weight:600}h1{font-size:32px;margin:8px 0}.sub{color:var(--sub)}
section{background:var(--card);border-radius:16px;padding:16px 20px;margin:12px 0}h2{font-size:19px;margin:0 0 6px}p{margin:0}a{color:var(--tint)}