#modal{
    display:block;
    position: fixed;
    top:0;
    left:0;
    right:0;
    bottom:0;
    width:100%;
    height:100%;
    overflow: hidden;
    z-index: 9999;
    background:rgba(0,0,0,.5);
    visibility: hidden;
}
#modal div.m_wrap{
    position: relative;
    width:100%;
    height:0;
    overflow: hidden;
    transition: all .2s ease;
}
#modal div.m_flex{
    display:flex;
    justify-content: center;
    align-items: center;
    position: relative;
    height:100%;
    padding:0 4px;
}
#modal_img{
    max-width: 100%;
    display:block;

}
#modal.active{
    visibility: visible;
}
#modal.active div.m_wrap{
    height:100%;
    transition: all .7s ease;
}