@-webkit-keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@-moz-keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
.fade-in {
  opacity: 0;
  -webkit-animation: fadeIn ease-in 1;
  /* make things invisible upon start */
  -moz-animation: fadeIn ease-in 1;
  /* call our keyframe named fadeIn, use animattion ease-in and repeat it only 1 time */
  animation: fadeIn ease-in 1;
  -webkit-animation-fill-mode: forwards;
  -moz-animation-fill-mode: forwards;
  /* this makes sure that after animation is done we remain at the last keyframe value (opacity: 1)*/
  animation-fill-mode: forwards;
  -webkit-animation-duration: 1s;
  -moz-animation-duration: 1s;
  animation-duration: 1s;
}