body { font-family: -apple-system, system-ui, sans-serif; max-width: 40rem; margin: 3rem auto; padding: 0 1rem; line-height: 1.6; color: #1f2328; background: #fff; }
h1 { font-size: 1.6rem; }
a { color: #0969da; }
@media (prefers-color-scheme: dark) { body { color: #e6edf3; background: #0d1117; } a { color: #4493f8; } }