---
phase: 27-component-library
plan: 01
subsystem: ui
tags: css, obsidian-plugin, dashboard, visualization, theming

# Dependency graph
requires:
  - phase: 27-component-library
    provides: Component CSS class names, loading skeleton, empty states, Obsidian CSS variable theming
provides:
  - Pure CSS dashboard visualizations for literature pipeline monitoring
  - Loading skeleton component (.paperforge-loading) with shimmer animation
  - Enhanced metric card with opacity transition and optional progress bar
  - 6-step lifecycle stepper with completed/current/pending state classes
  - 2x2 health matrix grid with color-coded status cells and hover tooltips
  - 6-segment maturity gauge with per-level color classes
  - Horizontal bar chart with lifecycle stage color variants
affects: phase 27-02 (JS render methods will consume these CSS classes)

# Tech tracking
tech-stack:
  added: []
  patterns:
    - All colors via Obsidian CSS variables (var(--color-*), var(--text-*), var(--background-*))
    - Section-based CSS organization with header comments
    - CSS-only tooltips via [title]:hover::after with attr(title)
    - CSS pseudo-element connecting lines via ::before
    - @keyframes animations for shimmer and pulse effects

key-files:
  created: []
  modified:
    - paperforge/plugin/styles.css

key-decisions:
  - All component CSS uses pure Obsidian CSS variables -- zero hardcoded colors outside pre-existing exceptions (.paperforge-install-log)
  - Shimmer color adjustment for dark mode via .theme-dark override
  - Maturity gauge uses gradient color progression (cyan -> blue -> purple -> green -> yellow -> red)
  - Bar chart uses same color mapping by lifecycle stage for visual consistency
  - Gauge segment level color classes follow CONTEXT.md D-17 through D-20
  - Tooltip implemented via CSS [title]:hover::after/::before (no JS) per D-16

patterns-established:
  - Section numbering: Sections 7-12 appended after existing Sections 1-6
  - Component class prefix: .paperforge-* throughout
  - Loading state: parent .paperforge-loading class dims children + overlays shimmer
  - Empty state: standalone .paperforge-empty-state for any child component

requirements-completed:
  - COMP-01
  - COMP-02
  - COMP-03

# Metrics
duration: 3 min
completed: 2026-05-04
---

# Phase 27 Component Library: Plan 01 Summary

**Pure CSS dashboard components for the PaperForge plugin -- loading skeleton, metric card, lifecycle stepper, health matrix, maturity gauge, and bar chart -- all themed via Obsidian CSS variables**

## Performance

- **Duration:** 3 min
- **Started:** 2026-05-04T06:33:18Z
- **Completed:** 2026-05-04T06:36:29Z
- **Tasks:** 3
- **Files modified:** 1 (paperforge/plugin/styles.css -- 391 new lines)

## Accomplishments

- Section 7 -- Loading Skeleton & Empty States: `@keyframes paperforge-shimmer` animation, `.paperforge-loading` reusable wrapper that dims children and overlays shimmer gradient, `.theme-dark` override, `.paperforge-empty-state` muted italic style
- Section 2 enhanced -- Metric Card: Added `opacity 0.3s` transition on value/label, optional `.paperforge-metric-progress` / `.paperforge-metric-progress-fill` progress bar sub-component
- Section 9 -- Lifecycle Stepper: 6 vertical steps with border-radius circles, `::before` connecting lines, `.completed` (green), `.current` (pulsing via `@keyframes paperforge-step-pulse`), `.pending` (dimmed) states
- Section 10 -- Health Matrix: 2x2 CSS grid with color-coded `.ok`/`.warn`/`.fail` cells using `var(--color-green/yellow/red)`, hover tooltips via `[title]:hover::after`/`::before`
- Section 11 -- Maturity Gauge: 6-segment horizontal bar with per-level color classes (`.level-1` through `.level-6`), `.gauge-level` number display, `.gauge-blockers` bullet list
- Section 12 -- Bar Chart: Horizontal bars with `.bar-row`/`.bar-track`/`.bar-fill`/`.bar-count`, `transition: width 0.3s`, lifecycle stage color variants (`.stage-imported` through `.stage-ai-ready`)
- All 20 CONTEXT.md decisions D-04 through D-23 implemented and verified

## Task Commits

Each task was committed atomically:

1. **Task 1: Loading skeleton + enhanced metric card CSS** - `8f1286d` (feat)
2. **Task 2: Lifecycle stepper + health matrix CSS** - `2bc1372` (feat)
3. **Task 3: Maturity gauge + bar chart CSS** - `b22db1a` (feat)

**Plan metadata:** Pending (finalization commit)

## Files Created/Modified

- `paperforge/plugin/styles.css` - 391 new lines across 6 new sections (Sections 7-12), enhancing the existing Section 2 metric card with transitions and optional progress bar

## Decisions Made

- **Gauge gradient progression:** Filled gauge segments use a rainbow gradient (cyan -> blue -> purple -> green -> yellow -> red) at the agent's discretion per D-17-D-18, giving visual distinction to each maturity level
- **Bar chart lifecycle colors:** Same color mapping as gauge for consistent visual language across components
- **Dark mode shimmer:** Reduced shimmer opacity in `.theme-dark` from 0.08 to 0.04 for appropriate contrast
- **Tooltip approach:** Pure CSS tooltip via `[title]:hover::after` / `::before` with arrow pointer, using `var(--background-modifier-hover)` for theming
- **Step pulse animation:** `@keyframes paperforge-step-pulse` at 2s with box-shadow glow effect for the current active step

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None -- all 22 verification checks passed on first attempt across 3 tasks.

## User Setup Required

None - no external service configuration required for CSS changes.

## Next Phase Readiness

- All 5 component CSS rule sets are complete and ready for Phase 27-02 JS render method implementation
- CSS class names are locked per CONTEXT.md decisions D-04 through D-23
- 391 lines of new CSS provide the complete visual contract for the component library
- Next plan: 27-02 (render methods to consume these CSS classes and build the dashboard components)

---
*Phase: 27-component-library*
*Completed: 2026-05-04*
