@media print {
    body {
        background: white;
        color: black;
        font-family: Arial, sans-serif;
    }

    button {
        display: none;
    }

    #resumen table {
        width: 100%;
        border-collapse: collapse;
    }

    #resumen th {
        background: #333 !important;
        color: white !important;
        padding: 10px;
        text-align: center;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    #resumen td {
        border: 1px solid #aaa;
        padding: 8px 12px;
        color: black;
    }

    #resumen .fila-total td {
        background: #ddd !important;
        font-weight: bold;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}