.thumbnail {
  -moz-backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  overflow: hidden;
  position: relative;
  
}
.thumbnail .overlay {
  border-bottom: 0px solid #005034;
  border-left: 0px solid transparent;
  bottom: 0;
  height: 0;
  position: absolute;
  right: 0;
  text-indent: -9999px;
  -moz-transition: all 0.6s ease-out;
  -o-transition: all 0.6s ease-out;
  -webkit-transition: all 0.6s ease-out;
  transition: all 0.6s ease-out;
  width: 0;
}
.thumbnail:hover .overlay {
  opacity: .80;
  border-bottom: 2300px solid #000;
  border-left: 2300px solid transparent;
  -moz-transition: all 0.6s ease-out;
  -o-transition: all 0.6s ease-out;
  -webkit-transition: all 0.6s ease-out;
  transition: all 0.6s ease-out;
}

.thumbnail .overlay-content {
  text-align: center;
  bottom: 0;
  color: #fff;
  left: 0;
  opacity: 0;
  padding: 10px;
  position: absolute;
  right: 0;
  top: 0;
  -moz-transition: all 0.5s ease-out;
  -o-transition: all 0.5s ease-out;
  -webkit-transition: all 0.5s ease-out;
  transition: all 0.5s ease-out;
}
.thumbnail .overlay-content h2 {
  border-bottom: 1px solid #fff;
  padding: 0 0 10px;
}


.thumbnail:hover .overlay-content {
  opacity: 1;
  -moz-transition: all 0.5s ease-out;
  -o-transition: all 0.5s ease-out;
  -webkit-transition: all 0.5s ease-out;
  transition: all 0.5s ease-out;
  -moz-transition-delay: 0.5s;
  -o-transition-delay: 0.5s;
  -webkit-transition-delay: 0.5s;
  transition-delay: 0.5s;
}