JavaFX - How to create a thin MenuBar?

Question

I've placed at the top of a BorderPane a MenuBar with a "File" Menu and a "Close" MenuItem inside:

How can I make it look thinner like the MenuBars of most of the software I use, similar to the image below?

I think it must be simple enough but as a beginner I couldn't really google it. I'm not sure how to name the problem (not many useful results for "javafx menubar height", size, styling, etc.)

Answer 1

Adding the following selectors to you stylesheet reduces the height of each menu element:

.menu-item { -fx-padding: 1 5 1 5; }
.menu { -fx-padding: 1 5 1 5; }

To remove the padding of all context menus, you can additionally add:

.menu .context-menu { -fx-padding: 1 1 1 1; }

And you can also decrease the font size:

.menu-item >.label {-fx-font-size:9;}
.menu >.label {-fx-font-size:9;}

Furthermore you can remove the left right padding of the MenuBar and decrease the spacing:

.menu-bar {
  -fx-padding: 0 1 0 1;
  -fx-spacing: 1;
};