:root { color-scheme: light dark; }

body {
  font: 16px/1.5 system-ui, sans-serif;
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: .35em;
  margin: 0;
}