def get_styles():
    return """
    .popup-container {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: white;
        border: 2px solid #ccc;
        border-radius: 10px;
        padding: 20px;
        width: 400px;
        z-index: 1000;
    }
    """