#cem-modal-overlay{
    position: fixed;
    top:0;left:0;width:100%;height:100%;
    background: rgba(0,0,0,0.6);
    z-index:1000;
}
#cem-modal{
    position: fixed;
    top:50%;left:50%;
    transform: translate(-50%,-50%);
    background:#fff;
    padding:20px;
    width:90%;
    max-width:400px;
    z-index:1001;
    box-shadow:0 0 10px rgba(0,0,0,0.3);
}
#cem-modal h2{margin-top:0;}
#cem-modal label{display:block;margin-bottom:8px;}
#cem-modal input[type="text"],
#cem-modal input[type="email"]{width:100%;padding:6px;}
#cem-modal button{margin-top:10px;}