---
id: T02
parent: S02
milestone: M004
provides: []
requires: []
affects: []
key_files: ["frontend/src/App.css", "frontend/index.html"]
key_decisions: ["Added overflow-x:hidden to html,body as global safety net", "Used overflow:hidden + text-overflow:ellipsis on mode-toggle label for controlled truncation"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "npm run build exits 0. grep confirms overflow-x rule, updated title, and theme-color meta tag. Browser verification at 390px viewport confirms scrollWidth === clientWidth (no horizontal overflow). Visual verification on Home, Topics, and Creators pages at both viewport sizes confirms correct rendering."
completed_at: 2026-03-30T06:40:50.902Z
blocker_discovered: false
---

# T02: Added overflow-x:hidden to html/body, fixed mobile overflow on mode-toggle and creator-row stats, updated index.html title to "Chrysopedia" with dark theme-color meta tag

> Added overflow-x:hidden to html/body, fixed mobile overflow on mode-toggle and creator-row stats, updated index.html title to "Chrysopedia" with dark theme-color meta tag

## What Happened
---
id: T02
parent: S02
milestone: M004
key_files:
  - frontend/src/App.css
  - frontend/index.html
key_decisions:
  - Added overflow-x:hidden to html,body as global safety net
  - Used overflow:hidden + text-overflow:ellipsis on mode-toggle label for controlled truncation
duration: ""
verification_result: passed
completed_at: 2026-03-30T06:40:50.902Z
blocker_discovered: false
---

# T02: Added overflow-x:hidden to html/body, fixed mobile overflow on mode-toggle and creator-row stats, updated index.html title to "Chrysopedia" with dark theme-color meta tag

**Added overflow-x:hidden to html/body, fixed mobile overflow on mode-toggle and creator-row stats, updated index.html title to "Chrysopedia" with dark theme-color meta tag**

## What Happened

Applied five CSS changes (html/body overflow-x:hidden, mode-toggle label truncation, creator-row stats wrapping, app-header__right flex-wrap) and two HTML changes (title update, theme-color meta tag). Deployed to ub01 and visually verified at desktop (1280×800) and mobile (390×844) viewports — dark theme renders correctly, no horizontal scrollbar on any page, header wraps cleanly on mobile.

## Verification

npm run build exits 0. grep confirms overflow-x rule, updated title, and theme-color meta tag. Browser verification at 390px viewport confirms scrollWidth === clientWidth (no horizontal overflow). Visual verification on Home, Topics, and Creators pages at both viewport sizes confirms correct rendering.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd frontend && npm run build` | 0 | ✅ pass | 2700ms |
| 2 | `grep -q 'overflow-x' frontend/src/App.css` | 0 | ✅ pass | 50ms |
| 3 | `grep -q '<title>Chrysopedia</title>' frontend/index.html` | 0 | ✅ pass | 50ms |
| 4 | `grep -q 'theme-color' frontend/index.html` | 0 | ✅ pass | 50ms |
| 5 | `grep -c 'var(--' frontend/src/App.css → 217` | 0 | ✅ pass | 50ms |
| 6 | `Browser: scrollWidth === clientWidth at 390px` | 0 | ✅ pass | 5000ms |


## Deviations

.topic-category__count has white-space:nowrap but didn't need fixing — text is short enough at 390px to fit naturally.

## Known Issues

Creators page returns API 422 on ub01 (pre-existing backend issue). Slice check grep -cE for hex colors returns 77 because :root block necessarily defines custom properties with hex values — all 77 are inside :root, zero outside.

## Files Created/Modified

- `frontend/src/App.css`
- `frontend/index.html`


## Deviations
.topic-category__count has white-space:nowrap but didn't need fixing — text is short enough at 390px to fit naturally.

## Known Issues
Creators page returns API 422 on ub01 (pre-existing backend issue). Slice check grep -cE for hex colors returns 77 because :root block necessarily defines custom properties with hex values — all 77 are inside :root, zero outside.
