CSS : shadow not visible on ProgressBar, TItledPane,TabPane

    @Override
    public void start(Stage stage) throws Exception {
        BorderPane root = new BorderPane();
        String style ="-fx-effect:dropshadow( one-pass-box , green , 10 , 0.5 , 10 , 15);";
        Button btn = new Button();
        btn.setStyle(style);
        ProgressBar bar = new ProgressBar();
        bar.setStyle(style);
        TitledPane pane = new TitledPane();
        pane.setStyle(style);
        TabPane tab = new TabPane();
        tab.setStyle(style);
        
        
        root.setCenter(VBoxBuilder.create().spacing(20).children(btn, bar, pane, tab).build());
        
        Scene scene = new Scene(root, 400, 400);
        stage.setScene(scene);
        stage.show();
        stage.setTitle(VersionInfo.getRuntimeVersion());
    }