@media print {
    .printDetails {
        margin-top: 20px; /* Adjust top margin */
        margin-bottom: 20px; /* Adjust bottom margin */
    }

        /* Optional: Add page break after every 3 details */
        .printDetails:nth-child(3n) {
            page-break-after: always; /* Force a page break after every 3 details */
        }
}