.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.popup-content {
    background: white;
    padding: 20px;
    border-radius: 8px;
    max-width: 420px;
    text-align: center;
    font-family: sans-serif;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.popup-btn {
    margin-top: 15px;
    padding: 8px 16px;
    border: none;
    background: #0078ff;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    font-size: 15px;
}

.popup-btn:hover {
    background: #005fcc;
}


.popup-overlay.active {
    visibility: visible;
    opacity: 1;
}