My test application creates three TextArea components with the following styles:

                        .style("-fx-font: italic 30pt 'Segoe Print';")
                        .style("-fx-font: italic 30px 'Segoe Print';")
                        .style("-fx-font: italic 30 'Segoe Print';")

All of them are rendered with the font of the same size which is different from what is rendered in the WebView and system. Moreover, it is not italic.