[WebAIM] MS Word Document and PDF Darkmode

Hello everyone,

I was wondering if there are any ressources on how to create documents 
in MS Word or and also export them as PDFs so that when users have dark 
mode enabled, the documents and PDFs are still easily readable.

As far as I understand, MS Word just switches background color and Text, 
so you should use the MS Word formatting tools to make sure MS Word 
/can/ change the colors.
But are there any guidelines on what to do or not to do when creating 
documents or which settings to set?
Or are there any ressources on what is changed into what or by which 
criteria?

What about text on graphical background? A lot of company designs have 
their own backgrounds, headers and footers.
If I have text in front of a more complex background, then that is 
probably not changed but the text will be, so it becomes very likely 
unreadable.
But if I integrate the text into the graphic, to make sure it stays 
readable, then it's not accessible as text anymore.
Or is it a solution to outline text? But I could imagine some customers 
being highly opposed to that look.

Are there any settings to set when exporting to PDF or any guidelines or 
best practices on how to create PDFs for light and dark mode?

If not, do you have any experiences with this topic and found best 
practices for yourself?

Thank you so much for the help!

Kind regards, Miriam