.loading {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    text-align: center;
    padding-top: 20%;
    font-size: 20px;
    z-index: 9999;
}