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# Fix #1109 — mobile hamburger dropdown clipped invisible by `.top-nav { overflow:hidden }` Red commit: `5429b0f` (failing E2E, asserts pixel-level visibility). ## Symptom On <768px viewports, tapping `#hamburger` toggles `.nav-links.open` and `body.nav-open` correctly — DOM state is right, `aria-expanded="true"`, computed `display:flex` — but **nothing appears below the navbar**. The dropdown is laid out at `y=52..626` but visually clipped. ## Root cause `.top-nav` is `position:sticky; height:52px; overflow:hidden` (added in #1066 fluid scaffolding at `417b460` to guard against horizontal overflow during the Priority+ measurement pass). At <768px the dropdown becomes `position:absolute; top:52px`, so its containing block is `.top-nav` — and `.top-nav`'s `overflow:hidden` clips everything below `y=52`. Result: the dropdown renders inside a 52px box and the user sees nothing. Full RCA + screenshots: https://github.com/Kpa-clawbot/CoreScope/issues/1109#issuecomment-4398900387 ## Fix In `public/style.css`, inside `@media (max-width: 767px)`, change `.nav-links` from `position:absolute` to `position:fixed`. `position:fixed` escapes any `overflow:hidden` ancestor (its containing block becomes the viewport), so the dropdown is no longer clipped. All other rules (display/flex/background/padding/z-index) keep working. This deliberately does **not** relax `overflow:hidden` on `.top-nav` — that would reopen the #1066 horizontal-overflow regression on desktop. ## Why prior tests missed this Existing nav E2Es asserted `.classList.contains('open')` / `getComputedStyle().display === 'flex'` — pure DOM state. Those passed even while the dropdown was clipped invisibly. The new test in this PR asserts **pixel-level visibility**: `document.elementFromPoint(viewportWidth/2, 100)` must land on something inside `.nav-links` (not `<body>`), and the first `.nav-link`'s bounding rect must satisfy `bottom > 60` and have non-zero area. A state-only fix can never satisfy this. E2E assertion added: `test-issue-1109-hamburger-dropdown-visible-e2e.js:113` (the `hitInsideNavLinks` check). ## Files changed - `public/style.css` — one line in the mobile media query: `position: absolute` → `position: fixed` - `test-issue-1109-hamburger-dropdown-visible-e2e.js` — new E2E - `.github/workflows/deploy.yml` — wire the new E2E into the suite Fixes #1109 --------- Co-authored-by: openclaw-bot <bot@openclaw.local>