:root{color-scheme:light dark}body{max-width:720px;margin:0 auto;padding:32px 16px 64px;font:16px/1.6 -apple-system,"Segoe UI",Roboto,sans-serif}h1{font-size:28px;margin-bottom:4px}h2{font-size:19px;margin-top:32px}.muted{opacity:.7}li{margin:4px 0}