#typewriter {
  position: relative;
  padding-top: 25%;
  -ms-transform: translateY(-25%);
  transform: translateY(-25%);
  vertical-align: middle;
}

h1, h2, h3 {
  font-weight: 200;
  text-align: center;
}

h1 { 
  font-size: 3.5em; 
  }

h2 {
  font-size: 2em;
}

h3 {
  font-size: 1em;
  margin-top: 2em;
}