@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 0.75;
  }
}

.contentIcon {
  width: 120px;
  height: auto;
  float: left;
  padding: 0.25rem 1rem 0.5rem 0;
  fill: #fff;
  animation: fadeIn 3s ease-in-out;
  opacity: 0.75;
}

.contentIcon.hidden {
  opacity: 0;
}