Free Astro tutorials for complete beginners.

Beginner's Guide to Astro

What is CSS?

The code that says how a page looks: colours, sizes, spacing and fonts.

If HTML is the walls of a page, CSS is the paint. A rule like h1 { color: green; } makes every big heading green. You can read most CSS almost like English.

Related terms

Back to the full glossary

Try "blog", "deploy" or "EmDash".