I need to setup a domain example.com with about a thousand pages, which represent about 100 micro-sites of about 10 pages each.

The thing is that I need that there’s no subdomains nor sub-folder separation.

Say that:

• pages A, B and C interlink together, but not to KLM nor XYZ.
• pages K, L and M interlink together, but not to ABC nor XYZ.
• pages X, Y and Z interlink together, but not to ABC nor KLM.

But, intentionally, there’s no signal to the user about the grouping.

Question:

Is it possible to run example.com/page-a, example.com/page-b and example.com/page-c with one theme and color settings (for example Kadence, light), then example.com/page-k, example.com/page-l and example.com/page-m with another theme and color settings (say Understrap) and then maybe example.com/page-x, example.com/page-y and example.com/page-z to use the same theme than ABC but with another color scheme (for example Kadence with dark theme)?

In short I want “separate microsites” from the design point of view but “mixed” from the URLs point of view.