gistfile1.css

.mad-libs-content {
  position: relative;
}

.animate-questions, .animate-results {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}

.animate-questions.ng-hide-add, .animate-results.ng-hide-add{
  animation:0.1s fade_out;
}

.animate-results.ng-hide-remove, .animate-questions.ng-hide-remove{
  animation:1s fade_in;
  animation-delay:1s;
}

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

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