:root { --fg: #1f2328; --muted: #57606a; --bg: #ffffff; --link: #0969da; }
@media (prefers-color-scheme: dark) { :root { --fg: #e6edf3; --muted: #8d96a0; --bg: #0d1117; --link: #4493f8; } }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif; line-height: 1.75; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.5rem; } h2 { font-size: 1.1rem; margin-top: 2em; }
a { color: var(--link); } code { font-size: 0.9em; overflow-wrap: anywhere; }
.meta { color: var(--muted); font-size: 0.9rem; }