.zoom-image {
  text-align: center;
  margin-bottom: 2em;
}
.zoom-image img {
  background: #eee;
  border: 1px solid #ccc;
  display: block;
  cursor: zoom-in;
  margin: 0 auto;
}
.zoom-image:hover img {
  opacity: 0.8;
  filter: alpha(opacity=80);
}