User blog comment:C H U N K Y/Abusing Chat Hacks/@comment-7560561-20130402153309/@comment-4018164-20130402155106

Cascading Style Sheets (CSS) is language that allows selecting certain parts in a webpage, and styling them.

It absically looks like this: selector { property: value; } selector { color: red; }
 * The selector is the part that you select. The webpage is based on a document called HTML. HTML is made from tags that tells your browser how do display a webpage's content. Those tags can be selected using CSS. The most common selectors are elements (like &lt;span&gt;), classes and ids. All of those are found in the HTML document.
 * property is a characteristic of the selector. It can be text color, background, etc.
 * value is the value of the property. For instance: