.fade-in {
  animation: fadeIn 0.5s;
  animation-fill-mode: both;
}
@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
.fade-out {
  animation: fadeOut 0.5s;
  animation-fill-mode: both;
}
@keyframes fadeOut {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}