#popup-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

#popup-box {
    background: #fff;
    padding: 20px 30px;
    border-radius: 12px;
    max-width: 420px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.3);
    text-align: center;
    font-family: Arial, sans-serif;
}

#popup-box h2 {
    margin-top: 0;
    font-size: 24px;
    font-weight: bold;
    color: #001e3c;
}

#popup-box p {
    font-size: 15px;
    line-height: 1.4em;
}

#popup-close {
    margin-top: 15px;
    padding: 8px 18px;
    background: #001e3c;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}
#popup-close:hover {
    background: #005fa3;
}