:root{--bg:#0e0f12;--fg:#e8e8ea;--muted:#9a9ca3;--accent:#ffd400;--card:#17181d}
@media (prefers-color-scheme: light){:root{--bg:#fafafa;--fg:#16171a;--muted:#5d6068;--card:#fff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
main{max-width:760px;margin:0 auto;padding:48px 16px 64px}h1{font-size:2rem;margin:.2em 0}h2{margin-top:2em;font-size:1.2rem}
a{color:var(--accent)}nav{display:flex;gap:18px;margin-bottom:32px;font-weight:600}nav a{color:var(--fg);text-decoration:none}
.muted{color:var(--muted)}.card{background:var(--card);border-radius:14px;padding:20px 22px;margin:18px 0}
footer{margin-top:48px;color:var(--muted);font-size:.9rem}