:root{--bg:#ffffff;--fg:#000000;--muted:#374151;--card:#f9fafb;--border:rgba(0,0,0,0.1);--btn:#000000;--btnText:#ffffff}@media (prefers-color-scheme:dark){:root{--bg:#000000;--fg:#ffffff;--muted:#d1d5db;--card:rgba(255,255,255,0.06);--border:rgba(255,255,255,0.12);--btn:#ffffff;--btnText:#000000}}body,html{height:100%}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,Apple Color Emoji,Segoe UI Emoji;background:var(--bg);color:var(--fg)}a{text-decoration:none;color:inherit}