@media print {
  body{background:#fff}
  #wpadminbar{display:none!important}
  .site-header,.site-footer,.header,footer,nav,.sidebar{display:none!important}
  /* Hide everything by default */
  body * { visibility: hidden !important; }
  /* Show only the preview */
  #rb-preview, #rb-preview * { visibility: visible !important; }
  #rb-preview {
    position: absolute; left: 0; top: 0; right: 0;
    margin: 0 auto; width: 100% !important; max-width: 794px !important;
    padding: 0 !important; border: none !important; box-shadow: none !important;
  }
  @page { size: A4; margin: 12mm; }
}