Learn CSS
CSS is what makes the web beautiful. It styles and lays out your HTML content, and the best place to learn it in depth is Mozilla's official guide: beginner-friendly, comprehensive, and always up-to-date.
Access Mozilla Learn CSS
The complete CSS guide, straight from the source.
What you'll learn
Selectors
Target the right elements with classes, IDs, and combinators.
Colors & Backgrounds
Apply colors, gradients, and background images with confidence.
Typography
Control fonts, sizing, spacing, and readable text styles.
Layouts & Grids
Arrange content with Flexbox, CSS Grid, and the box model.
Responsive Design
Adapt your pages to every screen size with media queries.
Transitions & Animations
Bring interfaces to life with smooth, tasteful motion.
Mastering CSS lets you turn plain markup into polished, responsive pages. Once you're comfortable styling content, move on to Learn JavaScript to add interactivity.