CSS

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation and visual formatting of documents written in HTML or XML, primarily for web pages. Developed by the World Wide Web Consortium (W3C), CSS enables developers to control the layout, colors, fonts, and overall aesthetics of web content, separating design from structure. First proposed by Håkon Wium Lie in 1994, CSS1 was released in 1996, followed by CSS2 (1998) and CSS3 (introduced in 1999, with modular specifications still evolving). CSS operates on a cascading principle, where styles are applied based on specificity, inheritance, and source order, allowing flexible and maintainable design across browsers and devices.