#cover-spin {
    position: fixed;
    width: 100%;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 9999;
    display: none;
    text-align: center;
}

#cover-spin span {
    font-weight: bold;
    color: white;
    font-size: 18px;
    margin: auto;
    text-align: center;
    display: block;
}