Web Font Performance Optimization

Optimize web font implementation for this project:

**Current Setup:**
- Fonts in Use: ${{FONTS_IN_USE}}
- Current Loading Method: ${{CURRENT_LOADING}}
- Page Types: ${{PAGE_TYPES}}
- Performance Issues: ${{PERFORMANCE_ISSUES}}

**Requirements:**
- Performance Target: ${{PERFORMANCE_TARGET}}
- Browser Support: ${{BROWSER_SUPPORT}}
- Offline Needs: ${{OFFLINE_NEEDS}}

Please provide:

1. **Font Audit**
   - Weights currently loaded
   - Actually used weights
   - Character sets needed
   - File size analysis
   - Redundancy identification

2. **Subset Strategy**
   - Language-based subsetting
   - Character range optimization
   - Latin extended needs
   - Special character requirements
   - Size savings estimate

3. **Format Optimization**
   - WOFF2 primary recommendation
   - WOFF fallback necessity
   - Format support matrix
   - Compression comparison

4. **Loading Strategy**
   - Font-display recommendations
   - Preload critical fonts
   - Async load secondary
   - Preconnect hints
   - Resource hints implementation

5. **FOUT/FOIT Prevention**
   - Flash of unstyled text handling
   - Flash of invisible text handling
   - Font loading API usage
   - Fallback font matching

6. **Critical CSS Fonts**
   - Above-fold font identification
   - Inline critical font CSS
   - Defer non-critical weights

7. **Variable Font Consideration**
   - Variable font availability
   - Size comparison vs static
   - Browser support status
   - Implementation approach

8. **Fallback Font Stack**
   - System font matching
   - Metric-compatible alternatives
   - Size-adjust CSS property
   - Visual consistency during load

9. **Caching Strategy**
   - Cache-control headers
   - Service worker caching
   - CDN recommendations
   - Version management

10. **Implementation Code**
    - @font-face declarations
    - Preload tags
    - Font loading JavaScript
    - CSS font-display usage
    - Performance monitoring setup

Provide specific code implementations and measurable performance targets.