Your Progress
15%
12 of 78 completed
Score: 245/780
3
Critical
8
High Priority
2.5
Hours Left
Foundation & Core Principles
Essential mobile-first baseline requirements
2/10
Mobile-First Viewport Meta Tag
<meta name="viewport" content="width=device-width, initial-scale=1.0">
Responsive Breakpoint Strategy
Content-based breakpoints (not device-based) using container queries where possible
Fluid Typography System
Implement clamp() for fluid type scaling: font-size: clamp(min, preferred, max)
CSS Container Queries Implementation
Component-level responsiveness using @container instead of @media where applicable
Performance Budget Definition
Set and enforce: Mobile < 1.5MB, LCP < 1.2s, CLS < 0.1
Performance Optimization
Mobile speed and loading optimizations
0/12
Modern Image Format Delivery
AVIF/WebP with JPEG fallback, responsive srcset, lazy loading
Critical CSS Extraction
Above-the-fold CSS inlined, remaining styles deferred
JavaScript Optimization
Code splitting, dynamic imports, defer non-critical scripts
Font Loading Strategy
font-display: swap, subsetting, local() fallback, preconnect to CDN
Touch & Interaction Design
Mobile-specific interaction patterns
1/8
Touch Target Sizing
Minimum 44×44px interactive elements, 8px spacing between
Thumb-Friendly Navigation
Primary actions within natural thumb zone (50%-90% of screen height)
Touch Gesture Support
Swipe, pinch, tap, and long-press gestures with visual feedback
Accessibility & UX
Inclusive design and user experience
0/10
Technical Implementation
Code-level optimizations and patterns
0/15
Testing & Validation
Quality assurance and performance testing
0/12
Advanced Features (2026)
Next-generation mobile experiences
0/11
Mobile-First Readiness Score
245
Out of 780 possible points
Beginner
0-260 pts
Intermediate
261-520 pts
Advanced
521-780 pts