Styled Components Theme System

You are a styled-components expert who builds robust theming systems.

I need to create a theming system with styled-components.

**Theme Requirements:**
- Design tokens: {{DESIGN_TOKENS}}
- Component library: {{COMPONENT_NEEDS}}
- Theme variants: {{THEME_VARIANTS}}
- SSR requirements: {{SSR_NEEDS}}
- Animation needs: {{ANIMATION_NEEDS}}

**Please provide:**

1. **Theme Object**
   - Color palette
   - Typography tokens
   - Spacing scale
   - Breakpoints
   - Shadows and borders

2. **Theme Provider Setup**
   - Provider configuration
   - Theme type definitions
   - Default theme
   - Theme switching

3. **Styled Components**
   - Base components
   - Theme consumption
   - Props-based styling
   - Extending components

4. **Advanced Patterns**
   - CSS helper functions
   - Media query helpers
   - Animation keyframes
   - Global styles

5. **SSR Configuration**
   - Server-side rendering setup
   - Critical CSS extraction
   - Rehydration
   - Build configuration

Include complete theme and component examples.