.logo_collage 
  line-height: 0
  -webkit-column-count: 5
  -webkit-column-gap:   0px
  -moz-column-count:    5
  -moz-column-gap:      0px
  column-count:         5
  column-gap:           0px
  img 
    width: 100% !important
    height: auto !important
    margin: 1px

@media (max-width: 1200px) 
  .logo_collage
    -moz-column-count:    4
    -webkit-column-count: 4
    column-count:         4
  
@media (max-width: 1000px) 
  .logo_collage 
    -moz-column-count:    3
    -webkit-column-count: 3
    column-count:         3
  
@media (max-width: 800px) 
  .logo_collage 
    -moz-column-count:    2
    -webkit-column-count: 2
    column-count:         2
  
@media (max-width: 400px) 
  .logo_collage 
    -moz-column-count:    1
    -webkit-column-count: 1
    column-count:         1