:root { color-scheme: light dark; --fg: #1c2030; --muted: #5b6272; --bg: #fdfdfd; --rule: #e5e7eb; --link: #2563eb; }
@media (prefers-color-scheme: dark) { :root { --fg: #e5e7eb; --muted: #a3a3a3; --bg: #171a21; --rule: #333a47; --link: #7dd3fc; } }
body { font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Segoe UI", sans-serif; line-height: 1.75; max-width: 760px; margin: 2rem auto; padding: 0 1.25rem; color: var(--fg); background: var(--bg); }
h1 { font-size: 1.6rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; border-bottom: 1px solid var(--rule); padding-bottom: 0.3rem; }
.meta { color: var(--muted); font-size: 0.9rem; }
a { color: var(--link); }
ul { padding-left: 1.4rem; } li { margin-bottom: 0.35rem; }
nav { font-size: 0.9rem; margin-bottom: 1.5rem; }
footer { margin-top: 3rem; color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--rule); padding-top: 1rem; }