oof thats difficult lmao. to this day css is something i cannot grasp. i only know like some stuff just to pass by and understand how to use a template and understand some logistics but i couldn't explain anything to you. your best bet is possibly looking through guides provided on janitor. it gets more complicated than just that but that might be a good start.

i think look at this site: https://jai-css-guide-resources.ju.mp/