body{font-family:-apple-system,system-ui,Segoe UI,Roboto,sans-serif;max-width:720px;margin:40px auto;padding:0 20px;line-height:1.6;color:#1d1d1f}
h1{font-size:1.8rem}h2{margin-top:2rem;font-size:1.2rem}a{color:#0a66c2}small{color:#6e6e73}
@media(prefers-color-scheme:dark){body{background:#111;color:#f5f5f7}a{color:#6cb6ff}}