# Python bytecode & cache
__pycache__/
*.py[cod]
*$py.class

# Virtual environments
venv/
env/
.venv/

# Environment files
.env

# Data files (track folders via .gitkeep, ignore data dumps)
data/raw/*
!data/raw/.gitkeep
data/processed/*
!data/processed/.gitkeep

# IDE & system artifacts
.vscode/
.idea/
.DS_Store
Thumbs.db