.single-portfolio a {
  display: block;
  line-height: 0;
  position: relative;
}
.single-portfolio a::before {
  background: #000 none repeat scroll 0 0;
  content: "";
  height: 100%;
  opacity: 0;
  position: absolute;
  top: 0;
  transform: scale(0.5);
  transition: all 0.3s ease 0s;
  width: 100%;
}
.single-portfolio:hover a::before {
	opacity: .5;
	transform: scale(1);
}
.single-portfolio a::after {
  color: #fff;
  font-family: FontAwesome;
  content: "\f08e";
  font-size: 60px;
  left: 0;
  position: absolute;
  right: 0;
  text-align: center;
  top: 50%;
  transform: scale(0);
  transition: all 0.6s ease 0s;
}
.single-portfolio:hover a::after {
	transform: scale(1);
}