CSS selectors

It might help to have some reference or discussion of CSS selectors before jumping in here with, say 'ul > li:last-child'. with 'a[href$="zip"]' close on its heels.

To look at the case of a tutorial-user chosen at random, I, for instance, was familiar with the simple selectors: tag, #id, and .class selectors, plus :pseudo-class and ::pseudo-element selectors, and may have seen (but not used) [attribute] selectors, but what I now have found described as "combinator" selectors (">", "-", "~") were (besides space " ") new and unfamiliar (though I'm glad to be acquainted with them now). Anyway, I've educated myself and am moving on, and they're not that hard to learn, but to have a little more info on them or a reference might help some other poor fool(s). 🤷‍♂️🤷‍♀️

Probably wouldn't hurt, in any case.

Revisa el material existente del tutorial relacionado con los selectores CSS, utilizando como punto de partida los ejemplos del issue, como los combinadores, los selectores de atributos y las pseudoclases. Se considera terminado cuando el contenido relevante del tutorial incluye una referencia o discusión útil sobre estos selectores para los estudiantes.