body {
  margin: 0;
  padding: 0;
  background-color: #000;
  display: flex;
  height: 100vh;
  width: 100vw;
  align-items: center;
  justify-content: center;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 3rem;
}

h1 {
  color: #fff;
  text-align: center;
}