.animated-element {
  visibility: visible;
  animation-duration: 2s;
  -webkit-animation-duration: 2s;
  -moz-animation-duration: 2s;
  animation-fill-mode: both;
  -webkit-animation-fill-mode: both;
  animation-timing-function: ease-in-out;
  -webkit-animation-timing-function: ease-in-out;
  -moz-animation-timing-function: ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.animated-element.fade-in {
  animation-name: fadeIn;
  -webkit-animation-name: fadeIn;
  -moz-animation-name: fadeIn;
}