div.gallerylogo {
  background: url(./latelier-logo.png) top center no-repeat;
  margin-top: -12px; 
  filter: opacity(45%);
  height: 82px;
}

@media screen and (max-height: 830px) {
  div.gallerylogo {
      background: url(./latelier-logo-small.png) center top no-repeat;
      margin-top: 0px; 
  }
}