---
estimated_steps: 13
estimated_files: 1
skills_used: []
---

# T01: Add mobile viewport CSS fixes for technique page elements and global content

Add CSS rules to `frontend/src/App.css` that prevent horizontal overflow on narrow viewports (~412px Galaxy S25 Ultra). CSS-only task — no TSX changes.

**Context:** The technique page has several elements that overflow on mobile:
1. `.technique-header__tags` — `display: inline-flex` with no `flex-wrap: wrap`, so multiple topic tags blow out horizontally
2. `.technique-header__creator-genres` — rendered in TechniquePage.tsx (line 235) with class `technique-header__creator-genres` but has **zero CSS rules**. Genre pill elements inline without wrapping.
3. `.version-switcher__select` (line ~2521) — can be wide with long version text like "v3 — Mar 30, 2026, 02:15 PM"
4. `.app-main` (line 199) — has `padding: 0 1.5rem` which is generous for mobile; tighten to 1rem
5. `.technique-header__meta` (line ~1408) — `flex-wrap: wrap` already present but gap could be tighter on mobile

**What already works (do NOT touch):**
- `.technique-banner--version` already has `flex-wrap: wrap` ✅
- `.technique-chain__flow` already wraps ✅
- `.technique-prose__json` already has `overflow-x: auto` ✅
- `.technique-moment__source` fixed in S05 ✅
- `html, body` have `overflow-x: hidden` ✅

## Inputs

- ``frontend/src/App.css` — existing stylesheet with technique page rules, 640px and 768px breakpoints`

## Expected Output

- ``frontend/src/App.css` — updated with mobile viewport overflow fixes: flex-wrap on tags, creator-genres rule, version-switcher max-width, tighter mobile padding and gaps`

## Verification

cd frontend && npm run build && echo '--- Build OK ---' && cd .. && grep -q 'flex-wrap: wrap' frontend/src/App.css && grep -q 'technique-header__creator-genres' frontend/src/App.css && echo '--- All checks passed ---'
