body{font:16px/1.6 -apple-system,system-ui,sans-serif;max-width:42rem;margin:0 auto;padding:1rem 16px 3rem;color:#1c1c1e;background:#fff}
@media(prefers-color-scheme:dark){body{background:#111;color:#f2f2f7}a{color:#8ab4ff}}
h1{font-size:1.8rem;line-height:1.2}h2{font-size:1.2rem;margin-top:2rem}nav,footer{font-size:.9rem;opacity:.8}nav a{margin-right:1rem}
.btn{display:inline-block;padding:.7rem 1.2rem;border-radius:.6rem;background:#0a84ff;color:#fff;text-decoration:none}