The timer encourages quick and dirty solutions. It took me a while to think of :is(input, button):not([disabled]) instead of a longer solution that I used at first. Another example was span[data-item] which is enough to mark exactly the required items at that level but I had found a longer, more specific selector for that first.
> It took me a while to think of :is(input, button):not([disabled]) instead of a longer solution that I used at first.
The intended solution is just :enabled. This is where I think this project has failed badly in its stated goal to “improve your CSS knowledge”, because all it offers in that direction is a little hint link; to actually teach, it needs a set of proposed solutions, and at the end show you any where you differed.
Such a thing might also help suggesting just [data-item] instead of the needlessly-more-specific span[data-item]. And also whether :nth-child(2n+3) was the intended solution on one of them.
