:root{color-scheme:light dark;--fg:#1d1d1f;--bg:#fff;--muted:#6e6e73;--accent:#0a66c2}
@media (prefers-color-scheme:dark){:root{--fg:#f5f5f7;--bg:#111;--muted:#a1a1a6;--accent:#4ea1ff}}
body{font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg);max-width:42rem;margin:0 auto;padding:2rem 1.25rem 4rem}
h1{font-size:1.9rem;line-height:1.2}h2{font-size:1.2rem;margin-top:2rem}a{color:var(--accent)}
.meta,footer{color:var(--muted);font-size:.9rem}nav a{margin-right:1rem}footer{margin-top:3rem;border-top:1px solid #8884;padding-top:1rem}