.fade {
  animation-name: fade;
  animation-duration: 1s;
}

@-webkit-keyframes fade {
  from {opacity: .5}
  to {opacity: 1}
}

@-o-keyframes fade {
  from {opacity: .5}
  to {opacity: 1}
}

@-moz-keyframes fade {
  from {opacity: .5}
  to {opacity: 1}
}

@keyframes fade {
  from {opacity: .5}
  to {opacity: 1}
}