.timer {
  font-size: 10rem;
  text-align: center;
}

.row-buttons {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
}

.header {
  margin-top: 3rem;
}

@keyframes slideInUp {
  from {
    transform: translate3d(0, 100%, 0);
    visibility: visible;
  }

  to {
    transform: translate3d(0, 0, 0);
  }
}

.secondary-instruction {
  animation-name: slideInUp;
  animation-duration: 1s;
  animation-delay: 600ms;
}