# Requirements: HoloHue

**Defined:** 2026-02-25
**Core Value:** A Rust developer can `cargo add holohue` and immediately have a stunning, animated, cyberpunk-aesthetic GUI with zero design effort.

## v1 Requirements

Requirements for initial release (demo application). Each maps to roadmap phases.

### Window System

- [x] **WIN-01**: Cyberpunk window chrome with angled/notched corners and 30/45-degree angles
- [x] **WIN-02**: Glow-line perimeter running 6-8px inside window edge
- [x] **WIN-03**: Semitransparent solid color or gradient background
- [x] **WIN-04**: Optional dot-grid overlay on window backgrounds
- [ ] **WIN-05**: Borderless frameless windows via Tauri
- [ ] **WIN-06**: Overlay subwindows (floating, draggable panels with z-order management)

### Core Components

- [x] **COMP-01**: Buttons (primary, secondary, icon, toggle) with hover/active/disabled/loading states
- [x] **COMP-02**: Text inputs (single-line, password, search) with glow-on-focus
- [x] **COMP-03**: Labels and text display (monospace + display font variants)
- [x] **COMP-04**: Toggles and switches with animated glow transition
- [x] **COMP-05**: Sliders with track glow, styled thumb, value tooltip
- [ ] **COMP-06**: Dropdowns with animated expand and staggered option population
- [x] **COMP-07**: Panels / cards with semitransparent bg and optional border glow
- [ ] **COMP-08**: Tables / data grids with sortable columns, row hover effects, scrolling
- [ ] **COMP-09**: Modal / dialog windows with animated entrance and backdrop dim
- [ ] **COMP-10**: Tooltips with glow border and subtle entrance animation
- [ ] **COMP-11**: Progress bars
- [ ] **COMP-12**: Tabs
- [ ] **COMP-13**: Breadcrumbs
- [ ] **COMP-14**: Notification toasts
- [ ] **COMP-15**: Image / image frames supporting .png, .webm, .gif with alpha

### Layout

- [ ] **LAYO-01**: CSS Grid-based layout system with configurable columns, gaps
- [ ] **LAYO-02**: Split panes (horizontal/vertical) with drag handle
- [ ] **LAYO-03**: Resizable panels with min/max constraints
- [ ] **LAYO-04**: Status bar (bottom-docked, segmented sections)
- [ ] **LAYO-05**: Styled scroll containers with themed scrollbars

### Animation

- [ ] **ANIM-01**: Window spawn animation (expand from point + light wave + content flicker)
- [ ] **ANIM-02**: Window close animation (reverse of spawn)
- [ ] **ANIM-03**: Button click animation (double blink + glow fade)
- [ ] **ANIM-04**: Page/view transitions (fade out + flicker in)
- [ ] **ANIM-05**: Dropdown population animation (staggered option entrance)
- [ ] **ANIM-06**: Ambient breathing glow on window edges
- [ ] **ANIM-07**: Periodic splash/ripple light effects
- [ ] **ANIM-08**: `prefers-reduced-motion` support with static fallbacks
- [ ] **ANIM-09**: Scanline / CRT overlay effect (optional)
- [ ] **ANIM-10**: Holographic shimmer on interactive element hover

### Theming

- [x] **THEM-01**: CSS custom property token system (primitive + semantic tokens)
- [x] **THEM-02**: One polished default cyberpunk theme (dark-only)
- [x] **THEM-03**: Font system with default monospace + display pairing

### Sound

- [ ] **SND-01**: UI interaction sounds (click, hover, transition, error)
- [ ] **SND-02**: Global mute / volume control
- [ ] **SND-03**: Sound system is opt-out (enabled by default, easily disabled)

### Platform & Distribution

- [ ] **PLAT-01**: Windows-only target (no cross-platform compatibility required)
- [ ] **PLAT-02**: Consumable via `cargo add holohue`
- [ ] **PLAT-03**: Anti-aliased rendering for all lines, fonts, and UI elements

### Demo

- [ ] **DEMO-01**: Demo application showcasing all components, animations, window system, and sound

## v2 Requirements

Deferred to future release. Tracked but not in current roadmap.

### Window System

- **WIN-07**: Edge-docked panels (slide in/out from window edges)
- **WIN-08**: Queued row/column panel grid with drag-drop reorder
- **WIN-09**: Layout persistence (save/restore panel arrangement)
- **WIN-10**: Panel constraints system (dev-defined min/max sizes, allowed positions)

### Theming

- **THEM-04**: 3+ additional curated theme presets (Neon Cyan, Blood Red, Toxic Green, etc.)
- **THEM-05**: Custom theme creation via token API
- **THEM-06**: Runtime theme switching with animated transition

### Sound

- **SND-04**: Ambient background audio (looping atmosphere)
- **SND-05**: Sound theme presets (industrial, digital, minimal)
- **SND-06**: Per-component sound override

### Developer Experience

- **DX-01**: Idiomatic Rust API polish (builder patterns, type safety, ergonomic naming)
- **DX-02**: Per-component API documentation with examples
- **DX-03**: Getting-started guide

### Accessibility

- **A11Y-01**: Full keyboard navigation audit
- **A11Y-02**: WCAG AA contrast ratio audit

## Out of Scope

Explicitly excluded. Documented to prevent scope creep.

| Feature | Reason |
|---------|--------|
| Light mode theme | Cyberpunk aesthetic is fundamentally dark. Neon glow looks terrible on light backgrounds. |
| Cross-platform support (macOS/Linux) | Windows-only target audience. Eliminates WebKitGTK/WebKit compatibility issues. |
| Chart / graph components | Massive scope commitment. Provide styled containers for existing charting libs instead. |
| Data fetching / networking layer | HoloHue is presentation-only. No coupling to data sources. |
| Rich text / code editor | Enormously complex. Out of scope per PROJECT.md. |
| Plugin / extension system | Premature abstraction. v2+ per PROJECT.md. |
| Mobile / responsive breakpoints | Desktop-first. Cyberpunk HUD doesn't translate to small touch screens. |
| Form validation system | Application logic, not presentation. Provide styled error/success states only. |
| CSS-in-JS / styled-components | Already using CSS custom properties for theming. Second styling paradigm is unnecessary. |
| Internationalization (i18n) | Framework provides components, not content. Almost no user-facing strings. |

## Traceability

Which phases cover which requirements. Updated during roadmap creation.

| Requirement | Phase | Status |
|-------------|-------|--------|
| WIN-01 | Phase 3: Core Components | Complete |
| WIN-02 | Phase 3: Core Components | Complete |
| WIN-03 | Phase 3: Core Components | Complete |
| WIN-04 | Phase 3: Core Components | Complete |
| WIN-05 | Phase 1: Foundation | Pending |
| WIN-06 | Phase 5: Virtual Window Manager | Pending |
| COMP-01 | Phase 3: Core Components | Complete |
| COMP-02 | Phase 3: Core Components | Complete |
| COMP-03 | Phase 3: Core Components | Complete |
| COMP-04 | Phase 3: Core Components | Complete |
| COMP-05 | Phase 3: Core Components | Complete |
| COMP-06 | Phase 3: Core Components | Pending |
| COMP-07 | Phase 3: Core Components | Complete |
| COMP-08 | Phase 3: Core Components | Pending |
| COMP-09 | Phase 7: Full Library and Demo | Pending |
| COMP-10 | Phase 7: Full Library and Demo | Pending |
| COMP-11 | Phase 7: Full Library and Demo | Pending |
| COMP-12 | Phase 7: Full Library and Demo | Pending |
| COMP-13 | Phase 7: Full Library and Demo | Pending |
| COMP-14 | Phase 7: Full Library and Demo | Pending |
| COMP-15 | Phase 7: Full Library and Demo | Pending |
| LAYO-01 | Phase 7: Full Library and Demo | Pending |
| LAYO-02 | Phase 7: Full Library and Demo | Pending |
| LAYO-03 | Phase 7: Full Library and Demo | Pending |
| LAYO-04 | Phase 7: Full Library and Demo | Pending |
| LAYO-05 | Phase 7: Full Library and Demo | Pending |
| ANIM-01 | Phase 4: Animation Choreography | Pending |
| ANIM-02 | Phase 4: Animation Choreography | Pending |
| ANIM-03 | Phase 4: Animation Choreography | Pending |
| ANIM-04 | Phase 4: Animation Choreography | Pending |
| ANIM-05 | Phase 4: Animation Choreography | Pending |
| ANIM-06 | Phase 4: Animation Choreography | Pending |
| ANIM-07 | Phase 4: Animation Choreography | Pending |
| ANIM-08 | Phase 4: Animation Choreography | Pending |
| ANIM-09 | Phase 4: Animation Choreography | Pending |
| ANIM-10 | Phase 4: Animation Choreography | Pending |
| THEM-01 | Phase 2: Theme System | Complete |
| THEM-02 | Phase 2: Theme System | Complete |
| THEM-03 | Phase 2: Theme System | Complete |
| SND-01 | Phase 6: Soundscape System | Pending |
| SND-02 | Phase 6: Soundscape System | Pending |
| SND-03 | Phase 6: Soundscape System | Pending |
| PLAT-01 | Phase 1: Foundation | Pending |
| PLAT-02 | Phase 1: Foundation | Pending |
| PLAT-03 | Phase 1: Foundation | Pending |
| DEMO-01 | Phase 7: Full Library and Demo | Pending |

**Coverage:**
- v1 requirements: 46 total
- Mapped to phases: 46
- Unmapped: 0

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*Requirements defined: 2026-02-25*
*Last updated: 2026-02-25 after roadmap creation*