:root {
  color-scheme: light;
  font-family: ui-sans-serif, system-ui, sans-serif;
}

body {
  margin: 0;
  background: #f7f7f8;
  color: #111;
}

main {
  max-width: 640px;
  margin: 4rem auto;
  padding: 1.5rem;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
}

h1 {
  margin-top: 0;
}

a {
  color: #0055cc;
}