body{font:17px/1.55 -apple-system,system-ui,sans-serif;max-width:40rem;margin:2rem auto;padding:0 1rem;color:#1c1c1e;background:#fff}
@media(prefers-color-scheme:dark){body{color:#f2f2f7;background:#1c1c1e}a{color:#64b5ff}}
nav a{margin-right:1rem}h1{font-size:1.8rem}h2{font-size:1.2rem;margin-top:2rem}