.loader-css {
    margin: 5px;
    border: 4px solid #cfcfcf;
    border-radius: 50%;
    border-top: 4px solid #444;
    width: 20px;
    height: 20px;
    display: none;
    -webkit-animation: spin 2s linear infinite; /* Safari */
    animation: spin 2s linear infinite;
}

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