#ajax-loader {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 9999;
}

#ajax-loader:before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;

    width: 40px;
    height: 40px;

    margin: -20px 0 0 -20px;

    border: 4px solid #dbeafe;
    border-top-color: #0d6efd;

    border-radius: 50%;

    animation: spin 0.8s linear infinite;

    box-shadow: 0 0 10px rgba(13, 110, 253, 0.35);
}