@media print {
  @page { size: letter portrait; margin: 12mm; }
  body:has(app-engraved-keys) { background: #fff !important; }
  body:has(app-engraved-keys) app-root > :not(app-engraved-keys):not(router-outlet) { display: none !important; }
  body:has(app-engraved-keys) app-engraved-keys { display: block !important; }
}