.popup-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.popup-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    max-width: 400px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    position: relative;
}

.dark-mode .popup-content {
    background-color: #2c2c2c;
    color: #f1f1f1;
}

.close-popup {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
}

.popup-button {
    display: inline-block;
    padding: 10px 20px;
    margin: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    text-decoration: none;
    color: #fff;
}

.popup-button.support {
    background-color: #4CAF50;
}

.popup-button.later {
    background-color: #f44336;
}

.popup-button.never {
    background-color: #9E9E9E;
}