:root{--bg:#0b1020;--fg:#e8ecf6;--muted:#9aa6c4;--accent:#8ab4ff;--card:#121a33}
@media (prefers-color-scheme: light){:root{--bg:#f6f8fc;--fg:#141a2b;--muted:#4a5577;--accent:#2a5bd7;--card:#ffffff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:48px 16px}h1{font-size:2.2rem;margin:0 0 .25rem}h2{margin-top:2rem;font-size:1.25rem}
p,li{color:var(--fg)}.muted{color:var(--muted)}a{color:var(--accent)}.card{background:var(--card);border-radius:14px;padding:20px 22px;margin:24px 0}
footer{margin-top:48px;font-size:.9rem;color:var(--muted)}nav a{margin-right:16px}