:root { color-scheme: light dark; --fg: #1d1d1f; --bg: #ffffff; --muted: #6e6e73; --link: #0a66c2; }
@media (prefers-color-scheme: dark) { :root { --fg: #f5f5f7; --bg: #111113; --muted: #a1a1a6; --link: #6cb4ff; } }
body { font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif; line-height: 1.75; color: var(--fg); background: var(--bg); max-width: 760px; margin: 0 auto; padding: 24px 16px 64px; }
a { color: var(--link); }
h1 { font-size: 1.5rem; } h2 { font-size: 1.15rem; margin-top: 2em; }
hr { margin: 3em 0; border: none; border-top: 1px solid var(--muted); opacity: .3; }
.muted { color: var(--muted); font-size: .9em; }
.nav { font-size: .9em; margin: 0 0 2em; } .nav a { color: var(--muted); text-decoration: none; }
footer { margin-top: 4em; color: var(--muted); font-size: .85em; }