HCM 9.2 We would like to add Company logo to Careers and Job Search pages in Candidate Gateway.

We are on tools 8.56.05 PUM 23. We would like to add company logo to the careers and job search pages for both internal and external applicants. We currently use classic Candidate Gateway for internal applicants only and are just beginning the project to roll out CG for external applicants. We want to roll out Fluid CG at the same time as external job. Is it easier to add logo to fluid components and pages than classic?

Can we modify a delivered stylesheet? Can we clone stylesheets and then change them?  Do we need to change them at all to get a custom look and feel?