@keyframes mockup {
  from {
    transform: translateX(100px);
    opacity: 0;
  }
}
@keyframes buttonStarted {
  from {
    transform: translateY(30px);
    opacity: 0.5;
  }
}
@keyframes h1TextStarted {
  from {
    transform: translateX(-100px);
    opacity: 0.5;
  }
}