CSS3 (Cascading Style Sheets Level 3)

CSS3, or Cascading Style Sheets Level 3, is a web design language used to control the appearance of websites. It allows designers to add colors, fonts, layouts, and other visual styles to HTML pages, enhancing user experience. CSS3 introduced many new features, such as rounded corners, shadows, and animations, making webpages more visually appealing and dynamic. By separating content from design, CSS3 ensures that changes can be made efficiently, improving the overall versatility and maintainability of web content.