What are Cascading Style Sheets? (CSS)

CSS (Cascading Style Sheets) is a style sheet language used to control the visual presentation and layout of a webpage. It defines how HTML elements should appear on the screen, including their colors, fonts, spacing, and positioning. By separating the content (HTML) from its presentation (CSS), CSS allows for more efficient web design and easier maintenance.

CSS is essential for creating responsive and aesthetically appealing websites. For example, CSS can adjust the layout of a webpage for different screen sizes, ensuring a seamless experience on desktops, tablets, and smartphones. With CSS, web developers can control the design elements globally, making updates across multiple pages with a single change.