MDN — CSS reference

Docs & NotebooksSee it livedeveloper.mozilla.org

A technical reference separates section navigation from a readable content column.

MDN — CSS reference — captured interface — Page excerpt · scroll inside to explore

Source capture · 2026-09-04Open full image ↗

Navigation

Why this pattern works

Use a persistent information hierarchy and clear page-level headings for long documentation.

Design notes

Surface: CSS reference
Navigation: A left documentation tree and right contents links support two levels of navigation.
Layout: A central reference document sits between section navigation and an in-page contents area.
Density: Use consistent spacing within repeated information so headings, values, and secondary details remain easy to compare.
Color: Light neutral surfaces, dark text, and softly separated code examples.
Type: Use a clear type hierarchy for the page title, primary content, and supporting labels.
Pattern: Use a persistent information hierarchy and clear page-level headings for long documentation.
States: Public CSS reference article; surrounding site promotions remain part of the source.
Don't: Do not copy brand assets or sample records. Preserve keyboard access and design empty, loading, and error states for the actual task.

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What should the tool respect?

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Prompt text

# My project
[Describe the product, audience, and screen you want to improve]

Stack: Use the existing project stack
Task: Implement the interface and verify the result in the existing project.

## Tool guidance (Any AI tool)
Use available project tools to inspect, implement, and test. State any unavailable capabilities.

# Design reference: MDN — CSS reference
Source: https://developer.mozilla.org/en-US/docs/Web/CSS/Reference
Swipefile reference: https://swipefile.design/ref/mdn-reference/
Captured: 2026-09-04. This is a dated reference, not a claim about the current live product.
Capture scope: a page excerpt. Do not infer unseen sections or interactions.

## Objective
Adapt the interaction and layout patterns below to my project. Use my own content and identity. Do not reproduce logos, proprietary copy, or brand assets.

## Reference notes
- surface: CSS reference
- nav: A left documentation tree and right contents links support two levels of navigation.
- layout: A central reference document sits between section navigation and an in-page contents area.
- density: Use consistent spacing within repeated information so headings, values, and secondary details remain easy to compare.
- color: Light neutral surfaces, dark text, and softly separated code examples.
- typography: Use a clear type hierarchy for the page title, primary content, and supporting labels.
- pattern: Use a persistent information hierarchy and clear page-level headings for long documentation.
- states: Public CSS reference article; surrounding site promotions remain part of the source.
- dont: Do not copy brand assets or sample records. Preserve keyboard access and design empty, loading, and error states for the actual task.

Useful for: Use a persistent information hierarchy and clear page-level headings for long documentation.

## Acceptance criteria
- Existing project conventions, design tokens, working functionality, and unrelated changes are preserved.
- Two or three reference principles clearly support the user's task; conflicts are resolved in favor of usability and the existing product.
- Reusable components and semantic HTML express the interface. Available licensed assets are used; important UI text is never rendered as a bitmap.
- Every visible control has a defined behavior. Loading, empty, error, success, disabled, and long-content states are specified where relevant. Demo data is clearly labeled.
- Navigation and content adapt at 375px, 768px, and 1440px without horizontal page overflow. Keyboard use, visible focus, labeled inputs, at least 44px touch targets, readable contrast, and reduced motion are supported.
- Verification distinguishes rendered behavior from proposals and identifies anything still requiring a backend or external service.

## Quality bar
Clear hierarchy, consistent spacing, restrained surfaces, and purposeful motion. Avoid decorative gradients, excessive cards, placeholder buttons, and invented metrics unless the project calls for them. Do not claim a feature is connected or tested without evidence.

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## Objective
Adapt the interaction and layout patterns below to my project. Use my own content and identity. Do not reproduce logos, proprietary copy, or brand assets.

Useful for: Use a persistent information hierarchy and clear page-level headings for long documentation.

MDN — CSS reference

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