#stats_popups {    
    position: fixed;
    top: 0;
    left: 0;
    background: rgba(0,0,0,0.4);
    z-index: 999;
    width: 100%;
    height: 100%;
    display: none;
}

#stats_popups .stats_popups--inner {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 800px;
    height: 550px;
    margin: -225px auto auto -400px;
    background: #fff;
    padding: 30px;
}

#stats_popups .stats_popups--inner--close {
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 40px;
    background: #fff;
    text-align: center;
    line-height: 40px;
    color: #000;
}
#stats_popups .stats_popups--inner--close:before {
    content: 'x';
    font-weight: bold;
    font-size: 24px;
}