#wjcallback-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1060;
}

#wjcallback-loader::after {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #0088cc;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 2s linear infinite;
    position: fixed;
    margin: 0 auto;
    top: 50%;
    left: 0;
    right: 0;
    margin-top: -40px;
    content: "";
}

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