:root{color-scheme:light dark;--bg:#0b1020;--fg:#f7f8ff;--muted:#9ca8c7;--accent:#8b7cff}
@media (prefers-color-scheme:light){:root{--bg:#f7f8ff;--fg:#0b1020;--muted:#4a5578;--accent:#5b4de0}}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 20px 80px}
h1{font-size:2rem;margin:0 0 4px}h2{margin-top:2em;font-size:1.2rem}
a{color:var(--accent)}p,li{color:var(--fg)}.muted{color:var(--muted)}
nav{margin:16px 0 28px;display:flex;gap:16px;flex-wrap:wrap}