:root{color:#1f2328;background:#fff;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}@media (prefers-color-scheme:dark){:root{color:#e6edf3;background:#0d1117}}body{margin:0}.container{max-width:720px;margin:0 auto;padding:2rem 1rem}.error{color:#cf222e}