Hi Insha, great article. Short and sweet, also well-structured and well-formatted. The only feedback I would give is the numberings on the "::before" and "::after" header are both 1.
I believe it should be 1. ::before then 2. ::after, so it makes sense (see image below).


Also, may be another small detail. You should use italic and bold mindfully, to emphasize certain points in your article. It can get too over-the-top if it's used in almost every sentence 😊 Overall, well done!