#input-section {
  animation: slide-out 1s ease-in-out forwards;
}

#game-section {
  animation: slide-in 1s ease-in-out forwards;
}

@keyframes slide-out {
  0% {
    transform: translateX(0);
    opacity: 1;
  }

  100% {
    transform: translateX(-100%);
    opacity: 0;
  }
}

@keyframes slide-in {
  0% {
    transform: translateX(100%);
    opacity: 0;
  }

  100% {
    transform: translateX(0);
    opacity: 1;
  }
}