What is CSS?

Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language such as HTML or XML. CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.

CSS is used to control the look and feel of web pages, including the following:

• The layout of web pages. CSS can be used to control the position of elements on a web page, such as the order in which they appear, how they are aligned, and how much space they take up.
• The appearance of web pages. CSS can be used to change the font, size, color, and other properties of text on a web page. It can also be used to change the background color, border, and other properties of elements on a web page.
• The media-specific styles. CSS can be used to create different styles for different media, such as screens, printers, and mobile devices. This allows web pages to be displayed correctly on a variety of devices.

How does CSS work?

CSS works by defining a set of rules that describe how HTML elements should be displayed. These rules are written in a cascading format, which means that the rules are applied in a specific order. The first rule that matches an element will be applied, and then the next rule, and so on.

CSS rules are typically written in a separate file called a stylesheet. This file can then be linked to an HTML document using the <link> tag.