:root {
  color-scheme: light dark;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  background: #fff;
  color: #111;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
}

main {
  padding: 2rem;
  text-align: center;
}

h1 {
  margin: 0;
  font-size: clamp(1.5rem, 5vw, 3rem);
  font-weight: 400;
  line-height: 1.3;
}

@media (prefers-color-scheme: dark) {
  :root { background: #111; color: #fff; }
}