.mi_popup_wrapper{
    background: rgba(0,0,0,0.2);
    position: fixed;
    top: 0;
    bottom: 0;
    width: 100%;
    z-index: 1000;
}
.mi_popup_wrapper .mi_popup{
    background: #FFF;
    position: absolute;
    margin-left: -300px;
    left: 50%;
    top: 60px;
    width: 600px;
}
.mi_popup_wrapper .mi_popup .mi_popup_content{
    display: inline-block;
}