@media print {
  @page {
    size: 210mm 297mm;
    margin: 0;
  }

  /*  __ _  _  _       ___ _____ */
  /* /  |_||_)| \   |   | (_  |  */
  /* \__| || \|_/   |___|___) |  */
  /* force colors */
  /* and margins */
  /* (210 - (70 * 2) - .2) / 2 */
  body.card-print {
    margin: 0 34.9mm;
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  /* hide helper */
  .card-print h2 {
    display: none;
  }

  /* reverse horizontal order for card backs */
  .card-print > div:nth-child(2n+1) {
    flex-direction: row-reverse;
  }
  
  .card-print .card {
    break-inside: avoid;
    margin: 0;
  }

  /* Margin for first line of each page */
  /* (297 - (100 * 2) - .2) / 2 */
  .card-print .card:nth-child(4n+1),
  .card-print .card:nth-child(4n+2) {
  /* .card-print .card:nth-child(9n+3) { */
    margin-top: 48.4mm;
  }
  /* Margin for last line of each page */
  .card-print .card:nth-child(4n+3),
  .card-print .card:nth-child(4n+4) {
    margin-bottom: 48.4mm;
  }
}