Keep HTML and CSS Markup Flexible with CSS Selectors

With CSS, we can completely transform the look of a website without changing its source code and markup. The key of that process is CSS selectors. But despite this, CSS selectors are one of the more neglected parts of the specification and CSS selectors are still not used to their full potential. You may sometimes spend too much time trying to solve a problem that you could more easily solve by using CSS selectors.
Today, I’m listing the list of CSS Selectors you Must Memorize if your want to keep your code (include HTML markup) and your style sheets flexible.
Note: I am not going to explain the basics of how CSS selectors in general work here.

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