.fi-short {
  -webkit-animation: fadein 0.5s ease-in; /* Safari, Chrome and Opera > 12.1 */
     -moz-animation: fadein 0.5s ease-in; /* Firefox < 16 */
      -ms-animation: fadein 0.5s ease-in; /* Internet Explorer */
       -o-animation: fadein 0.5s ease-in; /* Opera < 12.1 */
          animation: fadein 0.5s ease-in;
}

.fi {
  -webkit-animation: fadein 3s ease-in; /* Safari, Chrome and Opera > 12.1 */
     -moz-animation: fadein 3s ease-in; /* Firefox < 16 */
      -ms-animation: fadein 3s ease-in; /* Internet Explorer */
       -o-animation: fadein 3s ease-in; /* Opera < 12.1 */
          animation: fadein 3s ease-in;
}

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

/* Firefox < 16 */
@-moz-keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Safari, Chrome and Opera > 12.1 */
@-webkit-keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Internet Explorer */
@-ms-keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Opera < 12.1 */
@-o-keyframes fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}