body {
  background-color: #fff;
}
#fourOhFour {
  font-family: Helvetica, Arial, sans-serif;
  color: #333;
  text-align: center;
}
#fourOhFour h1 {
  font-size: 10rem;
  display: block;
}
#fourOhFour h2 {
  font-size: 3rem;
  display: block;
}