COLUMN_BUTTON_CSS = """
    QPushButton {
        background-color: #000000;
        color: #00ffff;
        border: 2px solid #00ffff;
        border-radius: 10px;
        font-size: 15px;
        font-weight: bold;
        padding: 10px;
    }
    QPushButton:hover { background-color: #003333; }
"""