# US-11 — Play on a phone

**As a** player with only a phone,
**I want to** join with a code and control a cook with touch,
**so that** the game works on the couch without a keyboard.

## Acceptance criteria
1. The layout works from 360 px wide to 4K: the kitchen scales to fit, the HUD stays
   legible, nothing overlaps, and there is no page scroll during play.
2. Touch controls appear on touch devices: a left thumb-zone drag stick (8-way
   quantized) and a large right *act* button (hold for progressive work).
3. Controls are usable one-handed per thumb, ≥ 44 px hit targets, and do not cover the
   serve window or the order queue.
4. `touch-action: none` on the play surface: no pinch-zoom, no scroll, no double-tap
   zoom; the on-screen keyboard never appears during play.
5. Orientation: portrait plays with a rotated hint (both orientations are playable).
6. Touch input uses Pointer Events; the same code path serves mouse (desktop click-to-act
   is not required — keyboard is the desktop input).
7. Lobby joining on a phone (type code, tap create/join) completes in < 20 s and shows
   the correct focus/type UI (`inputmode="text"`, `autocapitalize="characters"`).
8. Framerate on a mid-range mobile browser stays ≥ 30 fps with 4 cooks.

## E2E suite
`tests/e2e/test_us11_touch_mobile.py` — mobile viewport + `has_touch` context: create,
join by typed code, move via pointer drag, complete an action, assert no scroll and
control hit-target sizes.

## Phases
`07_canvas_client_and_hud`, `08_client_prediction_and_touch`,
`14_accessibility_polish_and_hardening`