QMainWindow::separator {
width: 4px; /* when vertical */
height: 4px; /* when horizontal */
}

QFrame {
    border: 0px solid green;
    }

QMainWindow::separator:hover  {
    background: #696969;
}
QDockWidget::title  {
    text-align: center;
    background: #D1D1D1;
    padding-left: 0px;
}

