If you want to change the FE rendering when you use css_styled_content, you have to know that all is done in this file:
typo3/sysext/css_styled_content/static/setup.txt
Don't do your changes here, copy what you need in your own setup file (internal in a template object or include it from an external file)
Else your changes will be lost after a core update
And know that you are here in the css_styled_content world, take the time to look around and try to understand what most of the code is doing. It will help you a lot if you ever need to change the FE output
If you want to change the FE rendering when you use css_styled_content, you have to know that all is done in this file: typo3/sysext/css_styled_content/static/setup.txt
here you'll find:
Don't do your changes here, copy what you need in your own setup file (internal in a template object or include it from an external file) Else your changes will be lost after a core update
And know that you are here in the css_styled_content world, take the time to look around and try to understand what most of the code is doing. It will help you a lot if you ever need to change the FE output