#modal-content{
    z-index:9999;
    display:none;
    position:fixed;
    top:30%;
    left:33.3%;
    width:50%;
    height:auto;
    margin:auto;
    padding:10px 20px;
    border:2px solid #aaa;
    background:#fff;
}
#modal-overlay{
    z-index:9998;
    display:none;
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background-color:rgba(51,51,51,0.6);
    margin-top:0px;
}