:root{--bg:#fafaf8;--fg:#1f2328;--muted:#5b616b;--link:#b45309;--card:#ffffff;--border:#e6e3dd}
@media (prefers-color-scheme:dark){:root{--bg:#14161a;--fg:#e6e8eb;--muted:#a0a6b0;--link:#f0a060;--card:#1b1e23;--border:#2a2e35}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 16px 64px}
h1{font-size:28px;margin:0 0 8px}h2{font-size:19px;margin:32px 0 8px}
p,li{color:var(--fg)}.muted{color:var(--muted);font-size:14px}
a{color:var(--link)}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px 24px;margin-top:24px}
nav{margin-top:32px;font-size:14px}