:root { color-scheme: light dark; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font: 18px/1.5 system-ui, -apple-system, sans-serif;
  background: Canvas;
  color: CanvasText;
}
main { padding: 0 16px; text-align: center; }
h1 { font-size: 2.5rem; letter-spacing: 0.04em; margin: 0 0 0.25rem; }
p { margin: 0; opacity: 0.7; }