:root{--bg:#fafaf9;--fg:#1c1917;--muted:#57534e;--link:#1d4ed8}
@media (prefers-color-scheme:dark){:root{--bg:#1c1917;--fg:#f5f5f4;--muted:#a8a29e;--link:#93c5fd}}
body{background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,sans-serif;margin:0;padding:32px 16px}
main{max-width:720px;margin:0 auto}h1{font-size:28px;margin:0 0 4px}h2{font-size:19px;margin-top:28px}
.muted{color:var(--muted)}a{color:var(--link)}nav a{margin-right:16px}