.iw-popup-overlay {
    position: fixed;
    background: rgba(0,0,0,0.6);
    display: none;
    z-index: 9999;
}

.iw-popup-box {
    background: #fff;
    padding: 25px;
    width: 400px;
    border-radius: 10px;
    position: relative;
}

.iw-popup-close {
    position: absolute;
    right: 12px;
    top: 10px;
    cursor: pointer;
    font-size: 20px;
}

.iw-pos-center { top:50%; left:50%; transform:translate(-50%,-50%); }
.iw-pos-right { top:50%; right:20px; transform:translateY(-50%); }
.iw-pos-left { top:50%; left:20px; transform:translateY(-50%); }
.iw-pos-top { top:0; left:0; width:100%; }
.iw-pos-bottom { bottom:0; left:0; width:100%; }