:root { color-scheme: light dark; }
body { margin: 0; font: 1.0625rem/1.6 system-ui, sans-serif; }
main { max-width: 40rem; margin: 0 auto; padding: 4rem 1.25rem; }
h1 { font-size: clamp(2rem, 6vw, 3rem); line-height: 1.1; margin: 0 0 1.5rem; }
a { color: inherit; text-underline-offset: 0.2em; }
a:focus-visible { outline: 3px solid currentColor; outline-offset: 3px; }