---
id: T01
parent: S02
milestone: M005
provides: []
requires: []
affects: []
key_files: ["frontend/src/App.css", "frontend/src/pages/TechniquePage.tsx"]
key_decisions: ["Sidebar fixed at 22rem width with sticky positioning at 1.5rem from top", "Page max-width widened from 48rem to 64rem"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "TypeScript compilation (tsc --noEmit) passed with zero errors. Production build (npm run build) succeeded. Docker web container rebuilt and restarted. Browser verification confirmed 2-column layout at desktop width and single-column collapse at 375px mobile width. Header spans full width above grid. No hardcoded colors in new CSS."
completed_at: 2026-03-30T08:47:37.603Z
blocker_discovered: false
---

# T01: Added CSS grid layout splitting technique page into prose (left) and sidebar (right) columns, collapsing to single column on mobile

> Added CSS grid layout splitting technique page into prose (left) and sidebar (right) columns, collapsing to single column on mobile

## What Happened
---
id: T01
parent: S02
milestone: M005
key_files:
  - frontend/src/App.css
  - frontend/src/pages/TechniquePage.tsx
key_decisions:
  - Sidebar fixed at 22rem width with sticky positioning at 1.5rem from top
  - Page max-width widened from 48rem to 64rem
duration: ""
verification_result: passed
completed_at: 2026-03-30T08:47:37.604Z
blocker_discovered: false
---

# T01: Added CSS grid layout splitting technique page into prose (left) and sidebar (right) columns, collapsing to single column on mobile

**Added CSS grid layout splitting technique page into prose (left) and sidebar (right) columns, collapsing to single column on mobile**

## What Happened

Widened .technique-page max-width from 48rem to 64rem. Added .technique-columns CSS grid with 1fr 22rem columns, 2rem gap, sticky sidebar at desktop widths, and @media (max-width: 768px) breakpoint that collapses to single column. Wrapped TechniquePage.tsx content sections in grid container with main (Summary + Body Sections) and sidebar (Key Moments + Signal Chains + Plugins + Related Techniques) children. Built and deployed to ub01 Docker container.

## Verification

TypeScript compilation (tsc --noEmit) passed with zero errors. Production build (npm run build) succeeded. Docker web container rebuilt and restarted. Browser verification confirmed 2-column layout at desktop width and single-column collapse at 375px mobile width. Header spans full width above grid. No hardcoded colors in new CSS.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd frontend && npx tsc --noEmit` | 0 | ✅ pass | 3000ms |
| 2 | `cd frontend && npm run build` | 0 | ✅ pass | 2600ms |
| 3 | `docker compose build chrysopedia-web && docker compose up -d chrysopedia-web` | 0 | ✅ pass | 7000ms |


## Deviations

Docker service name is chrysopedia-web not chrysopedia-web-8096 as plan stated. Had to run npm install on ub01 before type checking. TechniquePage.tsx was 505 lines not ~310 as estimated.

## Known Issues

None.

## Files Created/Modified

- `frontend/src/App.css`
- `frontend/src/pages/TechniquePage.tsx`


## Deviations
Docker service name is chrysopedia-web not chrysopedia-web-8096 as plan stated. Had to run npm install on ub01 before type checking. TechniquePage.tsx was 505 lines not ~310 as estimated.

## Known Issues
None.
