body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background-color: #f5f5f5;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

main h1 {
  font-size: 2.5rem;
  text-align: center;
  color: #444;
}