seafood/public/css/model-shade....

.shade {
    position:fixed;
    Z-index:1040;
    top:0;
    left:0;
    right:0;
    bottom:0;
    background-color:#999;
    opacity:0.5;
}
.wpq-model {
    Z-index:1050;
}
.hide {
    display:none;
}