When a middleware page is loaded, the Documentation section expands

[ikbensiep]

In the screenshot below, taken right after loading the page, the Documentation section should be collapsed by default.

When a page from the Documentation section is loaded, the correct <details> are expanded or collapsed.

[evert]

This is probably happening because I messed with the URI prefix for the first section. Would consider this 'nice to have' tho

[evert]

But if this is solvable with CSS, I'd probably do this with a parent selector. (figure out which page is open (marked with red right now), and default the section to open)

[ikbensiep]

I think it's easier to do this with JS than CSS tbh.
But, looking at the template code, I don't understand why the logic doesn't work in the current setup even taking your changes into account. I'll take another look at this.