body{
    background-color:#0b0f1a;
    color:white;
    font-family:Arial, Helvetica, sans-serif;
    text-align:center;
}

.form-container{
    background:#1a1f2e;
    padding:20px;
    margin:20px auto;
    width:350px;
    border-radius:10px;
}

.banner{
    width:100%;
    max-width:600px;
}
.popup {
    display: none;
    position: fixed;
    z-index: 999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
}

.popup-content {
    background: #1e1e1e;
    color: white;
    padding: 20px;
    width: 300px;
    margin: 15% auto;
    border-radius: 8px;
    text-align: center;
}

#popup-close {
    float: right;
    cursor: pointer;
    font-size: 20px;
}