:root{--bg:#fff;--fg:#111114;--muted:#5b5f6b;--brand:#1F5FD1;--line:#e6e8ee}
@media (prefers-color-scheme:dark){:root{--bg:#0b0d12;--fg:#f5f5f7;--muted:#a3a8b5;--brand:#8DB4FF;--line:#262a33}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 16px 64px}h1{font-size:28px;line-height:1.25;margin:0 0 4px}h2{font-size:19px;margin:32px 0 8px}
p,li{color:var(--fg)}.muted{color:var(--muted);font-size:14px}a{color:var(--brand)}nav{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:32px;font-weight:600}
nav a{text-decoration:none}ul{padding-left:20px}footer{margin-top:48px;border-top:1px solid var(--line);padding-top:16px}