:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color-scheme:light dark}
body{margin:0;min-height:100vh;display:grid;place-items:center;background:#f4f5f7;color:#202124}
main{width:min(92%,640px);padding:3rem;border:1px solid #ddd;border-radius:16px;background:#fff;box-shadow:0 8px 30px #0000000d}
h1{margin-top:0}a{color:inherit}.muted{opacity:.55;font-size:.9rem}
@media(prefers-color-scheme:dark){body{background:#17181a;color:#eee}main{background:#202225;border-color:#34363a}}