.loader {
    border: 8px solid #f3f3f3;
    border-radius: 50%;
    border-top: 8px solid #3498db;
    width: 60px;
    height: 60px;
    -webkit-animation: spin 2s linear infinite; /* Safari */
    animation: spin 2s linear infinite;
    
    position: absolute;
    left: 45%;
    top: 45%;
    /* transform: translate(-50%, -50%); */

    z-index: 1000;
}
  
/* Safari */
@-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
}
  
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}


.item_error {
    width: 100%;
    margin-top: 0.25rem;
    font-size: .875em;
    color: #dc3545;
}