--- # front-matter --- :root { color-scheme: dark light; font-family: "Liberation Serif", "Tinos", "Times New Roman", serif; margin: auto; line-height: 1.2; //letter-spacing: 0.5px; // A4 paper max-width: 210mm; } * { box-sizing: border-box; } a { text-decoration: underline; } pre, code { font-family: "Liberation Mono", "Cousine", "Courier New", monospace; // rem, root element, em, current element font-size: 0.8em; }