# Project Hints

## CssManager Singleton Pattern

**Location:** `ts/classes.cssmanager.ts`

The `CssManager` class uses a singleton pattern:
- **Static method:** `CssManager.getSingleton()` - Returns the singleton instance
- **Exported instance:** `cssManager` (from `ts/index.ts`) - Uses `getSingleton()` internally

Both access patterns are supported for backward compatibility:
- `cssManager.method()` - Legacy pattern (still works)
- `CssManager.getSingleton().method()` - Preferred pattern

The singleton ensures only one instance manages CSS variables and theme changes throughout the application.