.stage-wrapper {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

#container-a, #container-b {
  position: absolute;
  text-align: center;
}

#container-a {
  opacity: 1;
  transform: translateY(0);
}

#container-b {
  opacity: 0;
  pointer-events: none;
} 

#container-a.fade-out {
  pointer-events: none;
  animation: fadeOutUp 1s ease-in-out forwards;
}

#container-b.fade-in {
  pointer-events: auto;
  animation: fadeInUp 1.2s ease-in-out 0.5s forwards;
}

@keyframes fadeOutUp {
  0% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateY(-30px);
  }
}

@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}