body{margin:0;font:17px/1.6 Georgia,serif;background:#fffdf8;color:#222}
header,main,footer{max-width:760px;margin:0 auto;padding:16px}
nav a{margin-right:14px;color:#8a3b12}
h1{font-size:34px}
body.dark{background:#0d1117;color:#e6edf3}
body.dark nav a,body.dark a{color:#ffa657}