CSS

CSS stands for Cascading Style Sheets and is used to style HTML elements on a web page. It allows developers to control layout, color, font, spacing, and responsiveness across devices. CSS separates content (HTML) from presentation, making it easier to maintain and update designs. Styles can be applied inline, internally within the HTML, or through external CSS files.

A CSS rule consists of selectors and a declaration block specifying properties and values. CSS enables consistent styling across pages and supports features like media queries, animations, and grid systems. It's a fundamental technology alongside HTML and JavaScript in web development.

Developers can write clean, reusable code by efficiently managing CSS rules. Using external stylesheets helps enhance performance through browser caching and centralized styling. CSS is essential for creating visually appealing and responsive websites.