:root { color-scheme: light dark; --text: #1d1d1f; --muted: #6e6e73; --bg: #ffffff; --link: #0066cc; }
@media (prefers-color-scheme: dark) { :root { --text: #f5f5f7; --muted: #a1a1a6; --bg: #000000; --link: #2997ff; } }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.6rem; line-height: 1.3; }
h2 { font-size: 1.15rem; margin-top: 2em; }
a { color: var(--link); }
.meta { color: var(--muted); font-size: 0.9rem; }