I don´t understand CSS modals. The example is not intuitive and I don´t see the code to make it. Info is missing.
Another point:
It will be useful to start writing a list of each subtopic (the ones with *) - best regards.
Hey, I went and found :target explained on Mozilla and it makes a lot more sense now:
You can use the :target pseudo-class to create a lightbox without using any JavaScript. This technique relies on the ability of anchor links to point to elements that are initially hidden on the page. Once targeted, the CSS changes their display so that they are shown.