body{font-family:system-ui,-apple-system,"Segoe UI",Arial,sans-serif;max-width:720px;margin:0 auto;padding:32px 16px;line-height:1.6;color:#1f2937;background:#fff}
h1{font-size:1.8rem}h2{font-size:1.2rem;margin-top:2rem}
a{color:#2563eb}footer{margin-top:3rem;font-size:.9rem;color:#6b7280}
@media(prefers-color-scheme:dark){body{background:#111827;color:#e5e7eb}a{color:#93c5fd}footer{color:#9ca3af}}