.media-overlay {
  position: relative;
  display: block;
}

.media-overlay .image {
  display: block;
  width: 100%;
  height: auto;
}

.media-overlay .overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #3D484CB3;
  overflow: hidden;
  width: 100%;
  height: 0;
  transition: .5s ease;
}

.media-overlay:hover .overlay {
  height: 100%;
}

.media-overlay .text {
  white-space: nowrap; 
  color: white;
  font-size: 20px;
  position: absolute;
  overflow: hidden;
  top: 50%;
  left: 50%;
  text-align: center;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  width: 90%;
}