About

CSS Mastery is built for developers who ship interfaces.

CSS Mastery publishes practical CSS explanations for working frontend developers: people who already know the syntax, but still need reliable ways to reason about layout, cascade, responsive behavior, accessibility, and production bugs.

The site is edited by Andrew J Hughes. Every guide is written from an implementation perspective: what the browser is doing, what breaks under real content, and how to choose the smallest durable CSS rule for the job.

What belongs here

The site favors evergreen field guides, debugging workflows, and interactive demos over news posts. A good CSS Mastery page should help a developer make a better decision in an existing codebase.

What does not belong here

CSS Mastery does not publish scraped reference pages, AI-spun summaries, untested snippets, paid placement, or comments that require user-generated content moderation. Recommendations are included only when they serve the reader's implementation goal.