:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
body { margin: 0; padding: 2rem 1rem; }
main { max-width: 46rem; margin: auto; line-height: 1.6; }
code { overflow-wrap: anywhere; }
a:focus-visible, summary:focus-visible { outline: 3px solid currentColor; outline-offset: 4px; }