CSS
CSS is a set of web rules that controls how document elements look and fit together. It can set color, spacing, layout, screen-size changes, and visual states.
Another example
One HTML article must work at widths of 320 and 1280 pixels. CSS layout and media rules rearrange the same content for both sizes. Changing page data or business rules is not CSS's job.
Main parts
- 01selector
- 02declaration
- 03cascade and computed value
Use it when
Use this term for selectors, the cascade, final property values, layout, or visual style.
Do not use it when
Do not make CSS responsible for the meaning of content or changes in app data.
Name used in code
selector { property: value; } Before you ship
Check the runtime and version, integration limits, dependencies and licenses, and platform support. Verify security, failure, speed, monitoring, deploy, support owner, upgrade path, and rollback.
Outcome: Use or review CSS as a technical building block that the team can maintain. User context: One HTML article must work at widths of 320 and 1280 pixels. CSS layout and media rules rearrange the same content for both sizes. Changing page data or business rules is not CSS's job. Technology or engineering concept: CSS. Why it fits: Use this term for selectors, the cascade, final property values, layout, or visual style. Do not use it when: Do not make CSS responsible for the meaning of content or changes in app data. Engineering fit: Define where it runs and which version to use. Set its job, interfaces, data flow, dependencies, supported systems, security, and speed limits. Explain how it fits the current stack. Lifecycle safeguards: Check dependency health and licenses. Add monitoring and a fallback. Name the upgrade owner. Do not add a second tool for the same job without a measured benefit. Acceptance criteria: A small integration proves the needed behavior. Test compatibility, security, failure, and performance. Document deploy, upgrade, support, and rollback steps. Evidence and limits (evidence boundary): A formal document may still be a draft, release candidate, or final version. Check its status and browser or platform support. Unknowns to confirm: Current stack, runtime and version rules, target systems, dependency owner, performance budget, support period, and migration limits.
Check this request
Review the current use of CSS. Definition: CSS is a set of web rules that controls how document elements look and fit together. It can set color, spacing, layout, screen-size changes, and visual states. Release checks: Check the runtime and version, integration limits, dependencies and licenses, and platform support. Verify security, failure, speed, monitoring, deploy, support owner, upgrade path, and rollback. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.