#loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #781717;
    /* Old browsers */
    z-index: 1000;
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;
}

#loader-wrapper .loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    z-index: 1001;
    color: white;
}