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What Is CSS?

Simple Explanation of CSS (Cascading Style Sheets)

CSS, which stands for Cascading Style Sheets, is a tool used in web design to make websites look good. It’s like the wardrobe for your website. Just as you choose clothes to make an outfit, CSS is used to choose colours, fonts, and layouts for a website. When a website is created, HTML is used to build the structure (like the walls and floors of a house), and then CSS is used to decorate it (like choosing paint, curtains, and furniture). So, CSS is all about the visual style of a website, helping to make it attractive and easy to use.

Technical Explanation of CSS (Cascading Style Sheets)

CSS, or Cascading Style Sheets, is a stylesheet language used in web design to define the presentation and layout of web pages written in HTML or XML. CSS describes how elements should be rendered on screen, on paper, or in other media. It enables the separation of document content (written in HTML or a similar markup language) from document presentation, including elements like layouts, colours, and fonts.

This separation can improve content accessibility, provide more flexibility and control in the specification of presentation characteristics, enable multiple web pages to share formatting, and reduce complexity and repetition in the structural content. CSS uses a set of rules, where each rule consists of a selector and a declaration block. The selector points to the HTML element to style, and the declaration block contains one or more declarations separated by semicolons, with each declaration including a CSS property name and a value, separated by a colon.

CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript. There are different versions of CSS, with CSS3 being the latest standard. It adds new capabilities like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts. CSS3 is split into several separate documents called “modules”, each focusing on a particular aspect of the language. These modules are developed independently and are at various stages of development and browser adoption.

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