:root{--bg:#fff;--fg:#1a1a1a;--muted:#666;--max-width:64rem}@media (prefers-color-scheme:dark){:root{--bg:#121212;--fg:#f0f0f0;--muted:#a0a0a0}}*,:after,:before{box-sizing:border-box}body{background:var(--bg);color:var(--fg);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.6}.layout{flex-direction:column;min-height:100vh;display:flex}.site-footer,.site-header,main{width:100%;max-width:var(--max-width);margin:0 auto;padding:1rem}main{flex:1}.brand{color:inherit;font-weight:700;text-decoration:none}.site-footer{color:var(--muted)}