body{font:17px/1.6 -apple-system,system-ui,sans-serif;max-width:42rem;margin:3rem auto;padding:0 1.25rem;color:#1d1d1f}
@media(prefers-color-scheme:dark){body{background:#111;color:#f2f2f2}a{color:#7ab7ff}}
h1,h2{line-height:1.2}nav a{margin-right:1rem}small{color:#888}