:root { color-scheme: dark; font-family: system-ui, -apple-system, sans-serif; background: #0d1117; color: #f0f6fc; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.65; }
main { width: min(100% - 2rem, 48rem); margin: 2rem auto 4rem; }
header { border-bottom: 1px solid #30363d; padding-bottom: 1rem; }
h1 { line-height: 1.2; font-size: clamp(1.7rem, 5vw, 2.5rem); }
h2 { font-size: 1.25rem; margin-top: 2rem; }
a { color: #a9df6d; overflow-wrap: anywhere; text-underline-offset: 0.2em; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }
nav { display: flex; flex-wrap: wrap; gap: 1rem; }
li { margin-block: 0.5rem; }
footer { border-top: 1px solid #30363d; margin-top: 2rem; padding-top: 1rem; }
.brand { font-weight: 700; color: #a9df6d; }