.loader {
    border: 16px solid #f3f3f3; /* Light grey */
    border-top: 16px solid #3498db; /* Blue */
    border-radius: 50%;
    width: 120px;
    height: 120px;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media print
{    
    .no-print, .no-print *
    {
        display: none !important;
    }

    .sectionprintboleta, .sectionprintboleta *
    {
        zoom: 0.95;
    }    

    .pagebreak { page-break-before: always; }
}

@media screen
{    
    .only-print, .only-print *
    {
        display: none !important;
    }
}