.modal_box{
    position: absolute!IMPORTANT;
    top:0 !IMPORTANT;
    left:50% !IMPORTANT;
    transform: translateX(-50%);
    -webkit-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    max-width:172mm !IMPORTANT;
    min-height: auto;
    max-height: 100%;
}