.loading{
    overflow: hidden;
    height: 100vh;
}
.loading-box{
    position: fixed;
    top:0;
    left:0;
    z-index: -1;
    opacity: 0;
    background: rgba(255, 255, 255, 0);
    transition:  0.3s linear;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.loading .loading-box{
    opacity: 1;
    z-index: 1000;
    background: #F2F4F8;
    transition-delay: 1s;
}