# Core data processing
pandas>=2.0.0
numpy>=1.24.0
scipy>=1.10.0
statsmodels>=0.14.0

# Excel/document parsing
openpyxl>=3.1.0
python-docx>=1.0.0
chardet>=5.0.0

# Visualization
plotly>=5.18.0
matplotlib>=3.7.0
kaleido>=0.2.1

# Platform-specific (install as needed)
# Windows: pip install pywin32>=306
# macOS:   pip install xlwings>=0.30.0
# Legacy:  pip install xlrd>=2.0.0
