._banner-box:first-child {
    margin: 0;
}

._banner-box {
    width: 24%;
    border: 1px solid transparent;
    display: inline-block;
    text-align: center;
    margin: 0 0 0 1.18%;
    position: relative;
	float:left; 
}

iframe._banner-box {
    overflow:hidden;
    border: none;
}

._banner-popup-container {
    width: 100%;
    height: 100%;
    visibility: hidden;
    display: none;
    background-color: rgba(0,0,0,0.5); /*dim the background*/
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9998;
}
._banner-popup-visible {
    visibility: visible;
}
._banner-popup {
    margin: 0 auto;
    position:relative;
    z-index:1;
    top: 25%;
}
._popup-close {
    z-index: 1001;
    position: absolute;
    top: 0;
    right: 0;
    cursor: pointer;
}