:root { color-scheme: light dark; font: 17px system-ui, sans-serif; }
body { margin: 0; padding: 24px; } main { max-width: 760px; margin: auto; }
p { line-height: 1.5; } button,select { font: inherit; min-height: 44px; padding: 8px 12px; margin: 4px 0; }
pre { white-space: pre-wrap; overflow-wrap: anywhere; padding: 16px; border: 1px solid GrayText; border-radius: 8px; }
.ad-shaped { border: 1px dashed GrayText; padding: 16px; margin: 12px 0; }