Common Mobile Ux Core

---
name: common-mobile-ux-core
description: Enforce universal mobile UX principles for touch-first interfaces including touch targets, safe areas, and mobile-specific interaction patterns. Use when building mobile screens, handling touch interactions, or validating safe area compliance.
metadata:
  triggers:
    files:
      - "**/*_page.dart"
      - "**/*_screen.dart"
      - "**/*_view.dart"
      - "**/*.swift"
      - "**/*Activity.kt"
      - "**/*Screen.tsx"
    keywords:
      - mobile
      - responsive
      - SafeArea
      - touch
      - gesture
      - viewport
---

# Mobile UX Core

## **Priority: P0 (CRITICAL)**

## Guidelines

- **Touch Targets**: Min 44x44pt (iOS) / 48x48dp (Android). Add padding if needed.
- **Safe Areas**: Wrap content in `SafeArea`/`WindowInsets`. Avoid notches.
- **Interactions**: Use active states (no hover). Haptic feedback (short).
- **Typography**: Min 16sp body. Line height 1.5x.
- **Keyboards**: Auto-scroll inputs. Set `InputType` (email/number) & `Action`.

## Code Examples

- **Correct**: `IconButton(icon: Icon(Icons.close), padding: EdgeInsets.all(12))`
- **Avoid**: `Icon(Icons.close, size: 16)` (Touch target too small)

## Review Workflow

1. Test the smallest interactive element against 44pt iOS / 48dp Android.
2. Test content, keyboard, and fixed actions with notch/home-indicator/window insets.
3. Check pressed, loading, error, and disabled states; do not port desktop hover behavior.
4. Verify platform conventions separately before calling the screen complete.

## Anti-Patterns

- **No Hover Effects**: Mobile no cursor; use pressed/active states instead
- **No Tiny Targets**: All clickable elements must ≥44pt
- **No Fixed Bottoms**: Always account for Home Indicator and Keyboard safe areas
- **No OS Mixing**: Respect Material (Android) and Cupertino (iOS) conventions separately

## Related Topics

mobile-accessibility | mobile-performance | flutter-design-system | react-native-dls