Visual hierarchy and layout: production-level grid, rhythm, whitespace, depth. Use when implementing, reviewing or testing visual hierarchy and layout for React, Vite, Next.js or Perfect_AI projects.
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---
name: zt-design-layout
description: Visual hierarchy and layout: production-level grid, rhythm, whitespace, depth. Use when implementing, reviewing or testing visual hierarchy and layout for React, Vite, Next.js or Perfect_AI projects.
---
# Visual hierarchy and layout
## When to activate
Use on tasks involving **grid, rhythm, whitespace, depth**. For unrelated backend tasks do not load this skill.
## Implementation sequence
1. Write a design intent brief describing emotion, audience, trust requirement, content density, language and device.
2. Select structured palette: background/surface/foreground/secondary/accent/semantic/focus/chart.
3. Prefer OKLCH for ramp design, then gamut map to sRGB and compute WCAG contrast using linear sRGB.
4. Reject palette if body/foreground contrast fails, or if hue is sole meaning encoder; check all interaction states.
5. Ship CSS tokens, Figma-equivalent definitions, usage restrictions and screenshots in light/dark.
## Task-specific requirements
- Scope: **grid, rhythm, whitespace, depth**. Design the full execution path, not a screenshot placeholder.
- Identify dependency version and actual supported API signature; avoid inventing APIs.
- Use original code, or install licensed upstream through its maintained tool if the user wants upstream code.
- Choose measurable states, error handling, accessibility and performance budgets.
## Implementation starter
**Implementation notes:** Model grid, rhythm, whitespace, depth as explicit states, define input/output props and independent cleanup. Read master reference(s) below before writing code.
## Evidence / acceptance
- Document chosen semantic role palette and contrast table; fail visibly if accessibility thresholds are unmet.
- Test common, edge, interrupted, accessibility and responsive states; provide concrete artifacts/evidence.
## Deep references
- `../perfect-ai-master/references/03-color-theory.md`
- `../perfect-ai-master/references/18-color-decision-engine.md`
- `../perfect-ai-master/references/19-design-matrix.md`
