the art of building real-life components
It’s fairly possible to judge a component and say that it’s easy to implement it in HTML&CSS. I agree, it’s easy when you are working for practice purposes only, but for a real-life project, it’s completely different. The perfect responsive component that you just built will fail quickly in case it was used for a real-life project with real content. Why? It’s because judging on how a component can be built without considering the edge cases.