I can’t remember, but I think I just gave up trying to amend the css and instead I just made sure the text did not exceed 16 characters. Sometimes it is easier and better to accept the default design layout rather than producing your own.
I know your question is pretty old, but as I searched the entire internet for a solution to this problem. I only found your post. I ended up figuring out the following solution by myself, cause there were no documentations. Maybe someone has a better solution, but for now my solution was :