:root{color-scheme:light dark;font-family:system-ui,sans-serif;line-height:1.6}html{overflow-y:scroll}body{margin:0 auto;max-width:48rem;padding:1rem}header,footer{border-block-color:currentColor;border-block-style:solid;border-block-width:0 .0625rem;padding-block:1rem}footer{border-block-width:.0625rem 0 0;margin-block-start:3rem}a{text-underline-offset:.15em}img,pre,table{max-width:100%;overflow-x:auto}