:root { --bg: #ffffff; --fg: #1f2328; --muted: #59636e; --link: #0969da; }
@media (prefers-color-scheme: dark) { :root { --bg: #0d1117; --fg: #e6edf3; --muted: #9198a1; --link: #4493f8; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 42rem; margin: 3rem auto; padding: 0 16px; }
h1 { font-size: 1.6rem; margin-bottom: .25rem; }
p.sub { color: var(--muted); margin-top: 0; }
a { color: var(--link); }
li { margin-bottom: .5rem; }