---
name: adapt
description: Adapt designs to work across different screen sizes, devices, contexts, or platforms. Implements breakpoints, fluid layouts, and touch targets. Use when the user mentions responsive design, mobile layouts, breakpoints, viewport adaptation, or cross-device compatibility.
---

Adapt existing designs to work effectively across different contexts - different screen sizes, devices, platforms, or use cases.

## MANDATORY PREPARATION

Invoke /frontend-design — it contains design principles, anti-patterns, and the **Context Gathering Protocol**. Follow the protocol before proceeding — if no design context exists yet, you MUST run /teach-impeccable first. Additionally gather: target platforms/devices and usage contexts.

---

## Assess Adaptation Challenge

Understand what needs adaptation and why:

1. **Identify the source context**:
   - What was it designed for originally? (Desktop web? Mobile app?)
   - What assumptions were made? (Large screen? Mouse input? Fast connection?)
   - What works well in current context?

2. **Understand target context**:
   - **Device**: Mobile, tablet, desktop, TV, watch, print?
   - **Input method**: Touch, mouse, keyboard, voice, gamepad?
   - **Screen constraints**: Size, resolution, orientation?
   - **Connection**: Fast wifi, slow 3G, offline?
   - **Usage context**: On-the-go vs desk, quick glance vs focused reading?
   - **User expectations**: What do users expect on this platform?

3. **Identify adaptation challenges**:
   - What won't fit? (Content, navigation, features)
   - What won't work? (Hover states on touch, tiny touch targets)
   - What's inappropriate? (Desktop patterns on mobile, mobile patterns on desktop)

**CRITICAL**: Adaptation is not just scaling - it's rethinking the experience for the new context.

## Plan Adaptation Strategy

Create context-appropriate strategy:

### Mobile Adaptation (Desktop → Mobile)

**Layout Strategy**:
- Single column instead of multi-column
- Vertical stacking instead of side-by-side
- Full-width components instead of fixed widths
- Bottom navigation instead of top/side navigation

**Interaction Strategy**:
- Touch targets 44x44px minimum (not hover-dependent)
- Swipe gestures where appropriate (lists, carousels)
- Bottom sheets instead of dropdowns
- Thumbs-first design (controls within thumb reach)
- Larger tap areas with more spacing

**Content Strategy**:
- Progressive disclosure (don't show everything at once)
- Prioritize primary content (secondary content in tabs/accordions)
- Shorter text (more concise)
- Larger text (16px minimum)

**Navigation Strategy**:
- Hamburger menu or bottom navigation
- Reduce navigation complexity
- Sticky headers for context
- Back button in navigation flow

### Tablet Adaptation (Hybrid Approach)

**Layout Strategy**:
- Two-column layouts (not single or three-column)
- Side panels for secondary content
- Master-detail views (list + detail)
- Adaptive based on orientation (portrait vs landscape)

**Interaction Strategy**:
- Support both touch and pointer
- Touch targets 44x44px but allow denser layouts than phone
- Side navigation drawers
- Multi-column forms where appropriate

### Desktop Adaptation (Mobile → Desktop)

**Layout Strategy**:
- Multi-column layouts (use horizontal space)
- Side navigation always visible
- Multiple information panels simultaneously
- Fixed widths with max-width constraints (don't stretch to 4K)

**Interaction Strategy**:
- Hover states for additional information
- Keyboard shortcuts
- Right-click context menus
- Drag and drop where helpful
- Multi-select with Shift/Cmd

**Content Strategy**:
- Show more information upfront (less progressive disclosure)
- Data tables with many columns
- Richer visualizations
- More detailed descriptions

### Print Adaptation (Screen → Print)

**Layout Strategy**:
- Page breaks at logical points
- Remove navigation, footer, interactive elements
- Black and white (or limited color)
- Proper margins for binding

**Content Strategy**:
- Expand shortened content (show full URLs, hidden sections)
- Add page numbers, headers, footers
- Include metadata (print date, page title)
- Convert charts to print-friendly versions

### Email Adaptation (Web → Email)

**Layout Strategy**:
- Narrow width (600px max)
- Single column only
- Inline CSS (no external stylesheets)
- Table-based layouts (for email client compatibility)

**Interaction Strategy**:
- Large, obvious CTAs (buttons not text links)
- No hover states (not reliable)
- Deep links to web app for complex interactions

## Implement Adaptations

Apply changes systematically:

### Responsive Breakpoints

Choose appropriate breakpoints:
- Mobile: 320px-767px
- Tablet: 768px-1023px
- Desktop: 1024px+
- Or content-driven breakpoints (where design breaks)

### Layout Adaptation Techniques

- **CSS Grid/Flexbox**: Reflow layouts automatically
- **Container Queries**: Adapt based on container, not viewport
- **`clamp()`**: Fluid sizing between min and max
- **Media queries**: Different styles for different contexts
- **Display properties**: Show/hide elements per context

### Touch Adaptation

- Increase touch target sizes (44x44px minimum)
- Add more spacing between interactive elements
- Remove hover-dependent interactions
- Add touch feedback (ripples, highlights)
- Consider thumb zones (easier to reach bottom than top)

### Content Adaptation

- Use `display: none` sparingly (still downloads)
- Progressive enhancement (core content first, enhancements on larger screens)
- Lazy loading for off-screen content
- Responsive images (`srcset`, `picture` element)

### Navigation Adaptation

- Transform complex nav to hamburger/drawer on mobile
- Bottom nav bar for mobile apps
- Persistent side navigation on desktop
- Breadcrumbs on smaller screens for context

**IMPORTANT**: Test on real devices, not just browser DevTools. Device emulation is helpful but not perfect.

**NEVER**:
- Hide core functionality on mobile (if it matters, make it work)
- Assume desktop = powerful device (consider accessibility, older machines)
- Use different information architecture across contexts (confusing)
- Break user expectations for platform (mobile users expect mobile patterns)
- Forget landscape orientation on mobile/tablet
- Use generic breakpoints blindly (use content-driven breakpoints)
- Ignore touch on desktop (many desktop devices have touch)

## Verify Adaptations

Test thoroughly across contexts:

- **Real devices**: Test on actual phones, tablets, desktops
- **Different orientations**: Portrait and landscape
- **Different browsers**: Safari, Chrome, Firefox, Edge
- **Different OS**: iOS, Android, Windows, macOS
- **Different input methods**: Touch, mouse, keyboard
- **Edge cases**: Very small screens (320px), very large screens (4K)
- **Slow connections**: Test on throttled network

Remember: You're a cross-platform design expert. Make experiences that feel native to each context while maintaining brand and functionality consistency. Adapt intentionally, test thoroughly.