@media(min-width:469px) and (max-width:550px){

   #pdfSplitTool .image-container {
    max-width: calc(33% - 12px) !important;
   }

}

@media(max-width:468px){
   #pdfSplitTool .image-container {
      max-width: calc(50% - 10px) !important;
   }
}