:root{--bg:#fbfaf7;--fg:#1d1d1f;--muted:#6b6b70;--line:#e5e2dc;--accent:#2f6fde;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#111214;--fg:#ececee;--muted:#9a9aa1;--line:#2a2b30;--accent:#7aa7ff;--card:#18191c}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 16px 64px}
h1{font-size:2rem;line-height:1.2;margin:0 0 4px}
h2{font-size:1.2rem;margin:2rem 0 .5rem}
h3{font-size:1rem;margin:1.4rem 0 .3rem}
p,li{color:var(--fg)}
.muted{color:var(--muted);font-size:.92rem}
a{color:var(--accent)}
nav{display:flex;gap:16px;flex-wrap:wrap;font-size:.95rem;margin-bottom:32px}
.lang{display:flex;gap:8px;margin:16px 0 8px}
.lang a{padding:4px 10px;border:1px solid var(--line);border-radius:999px;text-decoration:none;font-size:.85rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin:12px 0}
hr{border:0;border-top:1px solid var(--line);margin:48px 0}
footer{margin-top:48px;color:var(--muted);font-size:.85rem}
.card p{margin:0}
h2.first{margin-top:0}