.fade-in {
  animation: fadeIn ease 5s;
  -webkit-animation: fadeIn ease 5s;
  -moz-animation: fadeIn ease 5s;
  -o-animation: fadeIn ease 5s;
  -ms-animation: fadeIn ease 5s;
}


@keyframes fadeIn{
  0% {
    opacity:0;
  }
  100% {
    opacity:1;
  }
}

@-moz-keyframes fadeIn {
  0% {
    opacity:0;
  }
  100% {
    opacity:1;
  }
}

@-webkit-keyframes fadeIn {
  0% {
    opacity:0;
  }
  100% {
    opacity:1;
  }
}

@-o-keyframes fadeIn {
  0% {
    opacity:0;
  }
  100% {
    opacity:1;
  }
}

@-ms-keyframes fadeIn {
  0% {
    opacity:0;
  }
  100% {
    opacity:1;
  }
}

/* The style below is just for the appearance of the example div */

.style {
  width:90vw; height:90vh;
  text-align:center;
  padding-top:calc(50vh - 50px);
  margin-left:5vw;
  border:4px double #F00;
  background-color:#000;
}
.style p {
  color:#fff;
  font-size:50px;
}