Docs: Some dark mode text styles missing when JavaScript is disabled

[JoshuaKGoldberg]

Docs page(s)

All of them, for the ESLint header
https://eslint.org/docs/latest/rules/* and other pages with syntax-highlighted code blocks

What documentation issue do you want to solve?

Several areas of pages have different -sometimes even unreadable- text when in dark mode & JavaScript is disabled. Copying examples from #16612:

JavaScript Disabled	JavaScript Enabled

What do you think is the correct solution?

Ideally, I'd think the same styles that normally get loaded should be used.

An alternate strategy used in those

Participation

• I am willing to submit a pull request for this change.

Additional comments

Reported by @amareshsm in #16612 -> #18071.

[amareshsm]

The details addressing the issue are included in this comment. I've outlined two methods that I'm aware of to resolve the problem.

Feel free to inform me if there are any elements I might have overlooked or if there's additional information I should consider.