CSSDesk - MGyKp

body {
  font-family: 'Lucida Grande', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  padding: 100px;
  font-size: 13px;
}

.hover,
.hover > span {
  background: #fff;
  position: relative;
  z-index: 1;
}

.hover {
  display: block;
 
  margin: 0 auto;
  width: 200px;
  padding: 100px;
  text-align: center;
}

.hover:before { content: ''; }

.hover:before,
.hover > div {
  background-image: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #f0f1f1), color-stop(100%, #444));
  background-image: -webkit-linear-gradient(#f0f1f1, #444);
  background-image: -moz-linear-gradient(#f0f1f1, #444);
  background-image: -o-linear-gradient(#f0f1f1, #444);
  background-image: -ms-linear-gradient(#f0f1f1, #444);
  background-image: linear-gradient(#f0f1f1, #444);

position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  
  -moz-transition: opacity 0.5s ease-out;
  -webkit-transition: opacity 0.5s ease-out;
  -o-transition: opacity 0.5s ease-out;
  transition: opacity 0.5s ease-out;
  
  z-index: -1;
  
  opacity: 0;
}

.hover:hover:before, 
.hover:focus:before,
.hover:hover > div,
.hover:focus > div {
  opacity: 1;
}

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