:root { color-scheme: light dark; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: system-ui, sans-serif;
  background: Canvas;
  color: CanvasText;
}
main { max-width: 36rem; padding: 2rem 1rem; }
h1 { margin-top: 0; }
.notice {
  padding: .75rem 1rem;
  border-left: 4px solid #d97706;
  background: color-mix(in srgb, #d97706 12%, transparent);
}