:root {
  color-scheme: light dark;
  --fg: #111;
  --bg: #fafafa;
  --muted: #666;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #f0f0f0;
    --bg: #111;
    --muted: #aaa;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  display: grid;
  place-items: center;
  padding: 2rem;
}

main {
  max-width: 36rem;
  text-align: center;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin: 0 0 0.5rem;
}

p {
  color: var(--muted);
  margin: 0;
}