@keyframes fadeIn_simple {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fadeOut_simple {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@keyframes fadeIn_visible {
  0% {
    opacity: 0;
    visibility: visible;
  }
  1% {
    opacity: 0;
  }
  100% {
    opacity: 1;
    visibility: visible;
  }
}
@keyframes fadeOut_hidden {
  0% {
    opacity: 1;
  }
  99% {
    opacity: 0;
  }
  100% {
    opacity: 0;
    visibility: hidden;
  }
}