#gallery{
  -webkit-column-count:4;
  -moz-column-count:4;
  column-count:4;
  
  -webkit-column-gap:20px;
  -moz-column-gap:20px;
  column-gap:20px;
}
@media (max-width:1200px){
  #gallery{
  -webkit-column-count:3;
  -moz-column-count:3;
  column-count:3;
    
  -webkit-column-gap:20px;
  -moz-column-gap:20px;
  column-gap:20px;
}
}
@media (max-width:800px){
  #gallery{
  -webkit-column-count:2;
  -moz-column-count:2;
  column-count:2;
    
  -webkit-column-gap:20px;
  -moz-column-gap:20px;
  column-gap:20px;
}
}
@media (max-width:600px){
  #gallery{
  -webkit-column-count:1;
  -moz-column-count:1;
  column-count:1;
}  
}

#gallery img, #gallery video {
  width:100%;
  height:auto;
  margin: 4% auto;
  box-shadow:-3px 5px 15px #000;
  cursor: pointer;
  -webkit-transition: all 0.2s;
  transition: all 0.2s;
}

.o-video {
  width: 100%;
  height: 0;
  position: relative;
  padding-top: 56.25%; /* 9 / 16 * 100 */
  margin-top: 1.5em;
  margin-bottom: 3.5em;
}
.o-video > iframe {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  border: 0;
}


.modal-img, .model-vid{
  width:100%;
  height:auto;
}
.modal-body{
  padding:0px;
}