TabSheet Css example?

Also… there is an example of how to edit the Css for the TabSheet component? Im trying to do some minnors changes for my app but I can’t even set a proper background color on any of the tabs or the component.

Im checking the css references from the book and, I also oppened the tabsheet section on the demo and checked the css with the developer tools from chrome to check out the css, but I havent been able to do what I want.

https://vaadin.com/book/-/page/layout.tabsheet.html

More specific, how can I separate the tabs? on the current theme, are like:

| tab1 | tab2 | tab3 |

I want :

| tab1 | | tab2 | | tab3 |

I figured out most of the other attibutes, but this.