:root { color-scheme: light dark; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: Canvas; color: CanvasText; }
main { max-width: 32rem; margin: 12vh auto; padding: 0 1.25rem; }
h1 { font-size: 1.375rem; margin: 0 0 0.5rem; }
p { margin: 0 0 1rem; }
textarea { width: 100%; box-sizing: border-box; font: 14px/1.4 ui-monospace, Consolas, monospace; padding: 0.5rem; border-radius: 0.5rem; }
button { font: inherit; padding: 0.5rem 1rem; border-radius: 999px; border: 1px solid currentColor; background: transparent; color: inherit; cursor: pointer; }
[hidden] { display: none; }