body {
  font-family: "Raleway", Arial, sans-serif
}
#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;
}  
}

.w3-row img {
  margin-bottom: -8px
}