CSS Best Practices

Production-grade CSS development with architectural principles, proper specificity management, and maintainable patterns.

Core Principles

1. Single Responsibility - Each class handles one concern only
2. Open/Closed - Open for extension, closed for modification
3. Immutable CSS - Utilities and objects never change after creation
4. Behavior over implementation - Focus on what the code does, not how
5. Accessibility first - Semantic HTML before ARIA, proper contrast and sizing

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