.ivg_gallery_section .ivg_gallery_itm {
    float: left;
    margin: 1%;
    width: 23%;
}

div.ivg_popbox {
    position: fixed;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background: rgba(0,0,0,0.7);
    z-index: 99;
}

div.ivg_popbox_wrap {
    margin: 0 auto;
    width: 100%;
    text-align: center;
    position: relative;
    top: 12.5%;
    display: block;
}

span.ivg_prev {
    position: fixed;
    top: 50%;
    left: 10%;
    color: #ff0;
    display: block;
    cursor: pointer;
}

span.ivg_next {
    position: fixed;
    display: block;
    top: 50%;
    right: 10%;
    color: #ff0;
    cursor: pointer;
}