a[data-gal] {
  display: block;
  position: relative;
}
a[data-gal] .first {
  width: 100%;
}
a[data-gal] .overlay-gallery {
  display: block;
  background: rgba(39, 39, 39, 0);
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  -webkit-transition: all 0.3s ease;
  transition: all 0.3s ease;
}
a[data-gal] .hover {
  display: block;
  visibility: hidden;
  height: 31px;
  width: 30px;
  text-align: center;
  position: absolute !important;
  left: 50%;
  margin-left: -15px;
  top: 50%;
  margin-top: -15px !important;
  -webkit-transition: all 0.1s ease;
  transition: all 0.1s ease;
}
a[data-gal]:hover .overlay-gallery {
  background: rgba(39, 39, 39, 0.73);
}
a[data-gal]:hover .hover {
  visibility: visible;
}