.popup {
    display: none;
    position: fixed;
    z-index: 9999;
    inset: 0;
    background: rgba(0,0,0,0.55);
}

.popup-content {
    background: #fff;
    width: 480px;
    max-width: 90%;
    margin: 8% auto;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    font-size: 16px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,.25);
}

.popup-logo {
    width: 370;
    max-width: 100%;
    height: auto;
    margin-bottom: 20px;
}

.close {
    position: absolute;
    top: 12px;
    right: 18px;
    font-size: 28px;
    cursor: pointer;
    color: #666;
}

.close:hover {
    color: #000;
}

#okButton {
    margin-top: 25px;
    padding: 12px 28px;
    background: #444;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color .25s ease;
}

#okButton:hover {
    background-color: #1873a5;
}