:root { --bg: #f5f5f7; --fg: #1d1d1f; --muted: #6e6e73; --accent: #e8692f; --card: #ffffff; }
@media (prefers-color-scheme: dark) { :root { --bg: #0b0b0d; --fg: #f5f5f7; --muted: #a1a1a6; --card: #1c1c1e; } }
body { font-family: -apple-system, system-ui, sans-serif; max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; line-height: 1.6; background: var(--bg); color: var(--fg); }
h1 { font-size: 1.8rem; margin-bottom: 0.2rem; }
h2 { font-size: 1.15rem; margin-top: 1.8rem; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.lang { background: var(--card); border-radius: 16px; padding: 4px 20px 16px; margin: 20px 0; }
nav a { margin-right: 16px; }