.hidden {
  display: none;
}

main > h1:after {
  overflow: hidden;
  display: inline-block;
  vertical-align: bottom;
  animation: ellipsis steps(5, end) 1300ms infinite;
  content: "\2026";
  width: 0px;
}

@keyframes ellipsis {
  to {
    width: 40px;
  }
}