CSS Website Layout

Last reviewed Jun 1, 2026 Content v20260601

This lesson

This lesson teaches CSS Website Layout—the ideas, syntax, and habits you need before moving on in CSS.

Without a solid grasp of CSS Website Layout, you will repeat mistakes in CSS exercises and on real pages or scripts.

You will apply CSS Website Layout in contexts like: All browser UIs, component libraries, marketing sites, and many native apps that reuse web views.

Read the lesson, edit HTML/CSS in the playground, press Run to preview, then answer the lesson MCQs.

When intermediate lessons feel comfortable and you are ready for production-style trade-offs.

Website layout combines spacing, typography, and responsive grid/flex decisions into a coherent page structure.

Header / Hero

Content area

Sidebar

Q: Flex vs Grid for page layout?
A: Grid suits two-dimensional page regions; flex suits one-dimensional component alignment.
Q: Why start layout mobile-first?
A: Forces essential hierarchy and scales up progressively.
Q: What is your pre-ship CSS layout check?
A: Validate at key widths, zoom levels, and keyboard navigation paths.

Pitfall: Check cascade order—author stylesheet loses to inline styles and !important surprises.

Can you explain this lesson in 30 seconds without reading notes?

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