body.popup-active {
    overflow: hidden;
}

.popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    padding: 20px;
    background-color: #fff;
    border: 1px solid #000;
    z-index: 1000;
}

.popup-content {
    text-align: center;
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 999;
}