css3
CSS3, the third generation of Cascading Style Sheets, is a fundamental technology used for creating the visual aspects of websites. With CSS3, designers can easily define colors, typography, spacing, and complex layouts such as flexbox and grid. The introduction of CSS3 revolutionized web design by adding features like animations, gradients, shadows, and advanced visual effects. This makes websites more interactive, modern, and responsive. CSS3 also supports mobile-first design, making it an essential tool in the mobile-driven world.