:root { color-scheme: light dark; font: 17px/1.6 system-ui, sans-serif; }
body { max-width: 760px; margin: 3rem auto; padding: 0 1.25rem; }
nav { display: flex; gap: 1.25rem; margin-bottom: 2rem; }
h1, h2 { line-height: 1.2; } h2 { margin-top: 2rem; }
a { color: light-dark(#0969da, #79b8ff); }
.notice { border: 1px solid; padding: 1rem; }