Typography Expression Variations

Create typography expression variations for this brand:

**Base Typography:**
- Primary Font: ${{PRIMARY_FONT}}
- Secondary Font: ${{SECONDARY_FONT}}
- Core Hierarchy: ${{CORE_HIERARCHY}}

**Expression Needs:**
- Communication Contexts: ${{COMMUNICATION_CONTEXTS}}
- Audience Segments: ${{AUDIENCE_SEGMENTS}}
- Mood Range: ${{MOOD_RANGE}}

Please develop:

1. **Corporate/Formal Expression**
   - Font weight adjustments
   - Size modifications
   - Spacing changes
   - Use cases
   - Visual example description

2. **Friendly/Approachable Expression**
   - Typography adjustments
   - Personality enhancement
   - When to apply
   - Visual example description

3. **Bold/Impactful Expression**
   - High-impact settings
   - Attention-grabbing adjustments
   - Application scenarios
   - Visual example description

4. **Elegant/Premium Expression**
   - Refined typography settings
   - Sophistication indicators
   - Luxury applications
   - Visual example description

5. **Playful/Fun Expression**
   - Energetic adjustments
   - Youth-oriented settings
   - Casual applications
   - Visual example description

6. **Technical/Informational Expression**
   - Data-focused settings
   - Clarity optimization
   - Documentation style
   - Visual example description

7. **Urgent/Action Expression**
   - Call-to-action typography
   - Emphasis techniques
   - Conversion optimization
   - Visual example description

8. **Expression Switching Guidelines**
   - When to switch expressions
   - Transition smoothness
   - Consistency maintenance
   - Mixing rules

9. **Channel-Specific Expressions**
   - Website expression
   - Social media expression
   - Email expression
   - Print expression
   - Presentation expression

10. **Expression Toolkit**
    - Quick reference guide
    - CSS variations
    - Design tokens
    - Implementation shortcuts

Provide complete typography variations with clear guidance on application contexts.