body {
  margin: 0;
  background-color: #e3e4ec;
}

img {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translateX(-50%) translateY(-50%);
          transform: translateX(-50%) translateY(-50%);
  max-width: 89%;
  max-height: 89%;
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

img:hover {
  max-width: 94%;
  max-height: 94%;
  -webkit-transition: 0.4s;
  transition: 0.4s;
}