Help changing layout for single passage

Hi everyone!

So I'm pretty knew to twine and don't know much about CSS past changing colors or sizes or positions.

I'm working on a sugarcube project and I actually want to use the default layout for MOST of my game. But I want to have a few title cards to divide up chapters.

Can anyone help me to change the layout for SPECIFIC passages, while keeping all other passages at the default layout?

This is essentially what I want my title card passages to lool like: all white, black text. No side bar. Kinda like this:

Thanks in advance!