Custom CSS for journals (not high priority)

[Doc-Sun]

Describe the solution you'd like
After talking with mango decided it was best to open this request as a reminder for the future. (no rush)
See images below for examples from other premium products and what the code looks like.
I would like for us to be able to so something similar with our digital journals (obviously that allows us to allow the player to use it as well)

While I am no UI/UX designer I do think these would have wonderful value in making the work look top quality.
I figure this can be done during final cleanups of the projects

Checklist:

• I have searched the existing issues to ensure this feature has not already been requested.