body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;max-width:720px;margin:40px auto;padding:0 20px;line-height:1.6;color:#1d1d1f}
h1{font-size:2em;margin-bottom:.2em}h2{margin-top:1.6em}a{color:#0066cc}.muted{color:#6e6e73}
nav a{margin-right:16px}
@media (prefers-color-scheme:dark){body{background:#000;color:#f5f5f7}a{color:#2997ff}.muted{color:#a1a1a6}}