body { margin: 0; font: 15px/1.5 system-ui, sans-serif; background: #f8fafc; color: #0f172a; }
main { max-width: 760px; margin: 0 auto; padding: 24px; }
code, pre { background: #e2e8f0; border-radius: 4px; padding: 1px 4px; font-size: 13px; }
pre { padding: 8px; white-space: pre-wrap; }
button { padding: 6px 12px; margin-right: 6px; }