body {
  margin: 0;
  font-family: sans-serif;
}

div.hero {
  width: 100vw;
  height: 100vh;

  display:flex;
  justify-content: center;
  align-items: center;

  text-align: center;
}

.hero h1 {
  font-size: 5em;
  margin-top: 0;
  margin-bottom: 0.5em;
}