This question leads to one of the most important ideas behind CSS: The selector, so named because it’s the way we “select” the HTML we want to style.

Understanding how browsers parse CSS and render websites is an important first step towards writing more efficient code. In this first piece on efficient CSS, we look at selectors, how the browser ...

Use this handy, simplified guide to quickly learn HTML and CSS -- a foundation of modern web development.

CSS has some great new tools like pseudo classes and pseudo elements for selecting things just by where they are in the DOM. For example, :first-child can select the first descendant of an element or ...