.poto_map_dropzone { 
  position: absolute;
  top:0px; left: 0px; width: 100%; height: 100%
}

.poto_map_overlay { 
  position: absolute; 
}
  

.bgtile { 
  position: absolute;
  z-index: 0;
}

/* Class used for elements which exist solely to be manipulated
 * by Javascript; not to be displayed to the user.
 */

.hidden { 
  display: none
}

.svg_overlay_object { position: absolute; }