:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
    body { max-width: 34rem; margin: 2rem auto; padding: 0 1.25rem; line-height: 1.5; }
    h1 { font-size: 1.4rem; } button { padding: .75rem 1rem; margin: .25rem; font: inherit; }
    pre { overflow-wrap: anywhere; white-space: pre-wrap; padding: 1rem; background: Canvas; border: 1px solid GrayText; border-radius: .5rem; }
    .warning { font-weight: 600; } [hidden] { display: none !important; }