.show {
  animation: show 1s forwards;
}
.hide {
  animation: hide 1s forwards;
}
@keyframes show {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes hide {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}