:root{--bg:#ffffff;--ink:#1f2328;--muted:#59636e;--line:#d1d9e0;--accent:#0b3d91}
@media (prefers-color-scheme:dark){:root{--bg:#0d1117;--ink:#e6edf3;--muted:#9198a1;--line:#30363d;--accent:#7aa7ff}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
main{max-width:760px;margin:0 auto;padding:32px 16px 64px}
h1{font-size:28px;line-height:1.25;margin:0 0 4px}
h2{font-size:20px;margin:32px 0 8px}
p,li{color:var(--ink)}
.muted{color:var(--muted);font-size:14px}
a{color:var(--accent)}
nav{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:24px;font-size:15px}
hr{border:0;border-top:1px solid var(--line);margin:40px 0}
ul{padding-left:22px}