:root{color-scheme:light dark}
body{font:16px/1.6 system-ui,sans-serif;max-width:42rem;margin:3rem auto;padding:0 1rem;color:#1a1a1a;background:#fff}
@media(prefers-color-scheme:dark){body{color:#e6e6e6;background:#141414}a{color:#8ab4f8}}
h1{font-size:1.8rem}h2{font-size:1.2rem;margin-top:2rem}
nav a{margin-right:1rem}footer{margin-top:3rem;font-size:.85rem;opacity:.7}