.impression .col-md-4 { margin: 15px 0px;}
.lightbox
{
  position: fixed;
  width: 100%;
  height: 100%;
  text-align: center;
  top: 0;
  left: 0;
  background-color: rgba(0,0,0,0.75);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
}
.lightbox img
{
  max-width: 90%;
  max-height: 80%;
  position: relative;
  top: -100%;
  /* Transition */
  transition: all 1s ease;
  -moz-transition: all 1s ease;
  -ms-transition: all 1s ease;
  -o-transition: all 1s ease;
  -webkit-transition: all 1s ease;
}
.lightbox:target
{
  outline: none;
  top: 0;
  opacity: 1;
  pointer-events: auto;
  transition: all 1.2s ease;
  -moz-transition: all 1.2s ease;
  -ms-transition: all 1.2s ease;
  -o-transition: all 1.2s ease;
  -webkit-transition: all 1.2s ease;
}
.lightbox:target img
{
  top: 0;
  top: 50%;
  transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  -o-transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
}