body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;max-width:680px;margin:40px auto;padding:0 16px;line-height:1.6;color:#1d1d1f;background:#fff}
h1{font-size:1.6em;margin-bottom:.2em}h2{font-size:1.15em;margin-top:1.6em}
p.sub{color:#666;margin-top:0}a{color:#0b57d0}footer{margin-top:3em;font-size:.85em;color:#777}
@media (prefers-color-scheme:dark){body{background:#111;color:#e8e8e8}p.sub,footer{color:#aaa}a{color:#8ab4f8}}