html,
body {
    background-color: transparent !important;
    margin: 0px;
}
#loading-box {
    position: fixed;
    display: flex;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
    background-image: url('./images/logo-bg.jpg');
    background-size: cover;
    z-index: 999;
    top: 0;
    left: 0;
}
.loading-box-hidden {
    opacity: 0;
    transition: opacity 1s;
}
.loading-box-show {
    opacity: 1;
    transition: opacity 1s;
}