:root {
  --num-of-images: 32;
}

.thumbnails li {
  width: 90px;
  height: 90px;
}

#middle_container {
  min-height: 510px;
}

#scroller_container {
  margin-top: 20px;
  margin-bottom: 10px;
  width: 812px;	
}

#image_scroller {
  margin: 0 10px 0 20px;
  width: 742px;
}

#thumbnails_container {
  width: calc(120px * var(--num-of-images));
}

#scroller_container,
#image_scroller,
#thumbnails_container {
  height: 106px;
}		

.folders {
  width: 0px;
}

.folders li {
  width: 106px;
  height: 106px;
}

.caption,
.description {
  width: 742px;
}