:root { color-scheme: light dark; font: 1.1rem/1.65 system-ui, sans-serif; }
body { max-width: 48rem; margin: 0 auto; padding: 1.5rem; }
header, footer { padding: 1rem 0; border-bottom: 1px solid #8887; }
footer { border-top: 1px solid #8887; border-bottom: 0; }
main { min-height: 55vh; }
article { margin: 2rem 0; }
pre { overflow-x: auto; padding: 1rem; background: #8882; }
img { max-width: 100%; height: auto; }
a { color: inherit; text-underline-offset: .15em; }