02 · CSS
What is CSS?
CSS stands for Cascading Style Sheets. CSS is used to control how a website looks. It can change colors, fonts, spacing, borders, backgrounds, sizes, alignment, layouts, responsive behavior, transitions, and animations.
If HTML is the structure of a website, CSS is what gives that structure its visual design. The same HTML content can look completely different depending on the CSS applied to it. CSS is what helps turn a plain page into a polished, professional interface.
Why is JS CODE OUTPUT good for CSS? You can edit your CSS and use Run or the live preview to see the visual changes immediately. This makes experimenting with layouts, responsive designs, colors, spacing, cards, buttons, and animations much easier because you can compare your code with the result as you build.