---
id: S03
parent: M005
milestone: M005
provides:
  - Key moment cards with two-row layout: standalone title line + metadata row
requires:
  - slice: S02
    provides: 22rem sidebar width constraint (D019) and technique page 2-column layout
affects:
  []
key_files:
  - frontend/src/pages/TechniquePage.tsx
  - frontend/src/App.css
key_decisions:
  - Changed title element from span to h3 for semantic correctness within the Key Moments h2 section
  - Renamed __header to __meta since it now contains only metadata (source, timestamp, badge)
patterns_established:
  - (none)
observability_surfaces:
  - none
drill_down_paths:
  - .gsd/milestones/M005/slices/S03/tasks/T01-SUMMARY.md
duration: ""
verification_result: passed
completed_at: 2026-03-30T08:57:05.630Z
blocker_discovered: false
---

# S03: Key Moment Card Redesign

**Restructured key moment cards: title promoted to standalone h3 on its own line, metadata (source file, timestamp, content type badge) moved to a clean flex-row below.**

## What Happened

The key moment cards in the technique page sidebar previously used a single `__header` flex row containing title, source filename, timestamp, and content type badge as siblings. At the 22rem sidebar width (established by S02/D019), `flex-wrap: wrap` caused unpredictable line breaks — the title could wrap mid-word next to metadata or land on its own line depending on content length.

T01 restructured the card into two explicit rows: the title as a standalone `<h3>` element (semantic correctness — it's a sub-heading within the Key Moments `<h2>` section), followed by a `__meta` div containing only the metadata elements in a flex row. CSS resets h3 default margins and uses `display: block` for the title to guarantee its own line regardless of content length.

The old `__header` class was fully removed from both JSX and CSS — no dead CSS left behind.

## Verification

All four verification checks from the slice plan pass:
1. `npx tsc --noEmit` — zero TypeScript errors (exit 0)
2. `npm run build` — Vite production build succeeds, 46 modules transformed (exit 0)
3. `grep technique-moment__header` in TSX — no matches, confirming full replacement (exit 0)
4. No hardcoded hex/rgba values in new or modified CSS rules (exit 0)

Additionally confirmed: JSX structure matches the target layout exactly (h3 → meta div → summary paragraph), and dead `__header` CSS class fully removed from App.css.

## Requirements Advanced

- R006 — Key moment cards within technique pages now have clearer visual hierarchy — title prominently on its own line, metadata on a clean secondary row. Improves readability of the technique page display.

## Requirements Validated

None.

## New Requirements Surfaced

None.

## Requirements Invalidated or Re-scoped

None.

## Deviations

Full frontend source tree was synced from ub01 to enable local TypeScript and Vite build verification — the local checkout only had the two target files. This is an infrastructure deviation, not a code deviation.

## Known Limitations

None.

## Follow-ups

None.

## Files Created/Modified

- `frontend/src/pages/TechniquePage.tsx` — Extracted key moment title from __header flex row into standalone h3 element; renamed __header div to __meta
- `frontend/src/App.css` — Added __title block styles with h3 margin reset; added __meta flex styles (migrated from __header); removed dead __header class
