# 05. Design Layered Navigation UI System

meta:
  id: podtui-navigation-theming-improvements-05
  feature: podtui-navigation-theming-improvements
  priority: P1
  depends_on: [podtui-navigation-theming-improvements-02, podtui-navigation-theming-improvements-03, podtui-navigation-theming-improvements-04]
  tags: [navigation, ui-design, layer-system]

objective:
- Design a visual layered navigation system that clearly shows depth
- Implement active layer indicators and highlighting
- Create smooth layer transition animations
- Establish visual hierarchy for nested content

deliverables:
- Enhanced Layout component with layer background system
- Layer indicator component
- Layer transition animations
- Visual hierarchy documentation

steps:
- Create layer background color system in constants/themes.ts
- Enhance Layout.tsx to support layer backgrounds
- Create LayerIndicator component
- Implement layer depth visual cues
- Add smooth transitions between layers
- Test layer visibility and transitions

tests:
- Unit: Test LayerIndicator component
- Integration: Test layer navigation visual feedback

acceptance_criteria:
- Layer backgrounds are visible and distinct
- Active layer is clearly highlighted
- Layer depth is visually indicated
- Transitions are smooth and intuitive
- Visual hierarchy is clear

validation:
- Run `bun run start` and test layer navigation
- Verify layer backgrounds appear at different depths
- Check that active layer is clearly visible
- Test smooth transitions between layers

notes:
- Use subtle color variations for layer backgrounds
- Ensure high contrast for readability
- Consider animation duration (200-300ms)
- Layer depth should be limited to 3-4 levels max