@media print {
  @page { size: A4 portrait; margin: 18mm; }
  .print-sheet { text-align: center; color: #000; }
  .print-sheet h1 { color: #000; font-size: 40px; }
  .print-sheet .qr-box { max-width: 130mm; padding: 0; }
  .print-sheet .url { font-family: monospace; font-size: 12px; color: #444; word-break: break-all; }
  .print-sheet .red { color: #D7202A; }
}