diff --git a/.gitignore b/.gitignore
index 2cf0aca..181d0a5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,21 +1,83 @@
+# Data files (except example data)
 *.csv
+### !thechart_data.csv
+
+# Environment files
 .env
+.env.local
+.env.*.local
+
+# Build and distribution
 build/
 dist/
+*.egg-info/
+
+# Python bytecode
 *.pyc
-__pycache__/
-*.spec
-*.log
-logs/
-.venv/
-.poetry/
-.pytest_cache/
-.ruff_cache/
-*.db
-*.sqlite3
 *.pyo
 *.pyd
-*.coverage
+__pycache__/
+
+# PyInstaller
+*.spec
+
+# Logs
+*.log
+logs/
+
+# Virtual environments
+.venv/
+.poetry/
+venv/
+env/
+ENV/
+
+# Testing
+.pytest_cache/
+.coverage
 .coverage.*
-*.mypy_cache/
-*.DS_Store
+coverage.xml
+htmlcov/
+.tox/
+.nox/
+
+# Code quality tools
+.ruff_cache/
+.mypy_cache/
+.pylint.d/
+
+# IDEs and editors
+.vscode/
+!.vscode/tasks.json
+!.vscode/launch.json
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+Thumbs.db
+
+# Databases
+*.db
+*.sqlite3
+*.sqlite
+
+# uv lock files (keep for reproducibility)
+# uv.lock
+
+# Docker
+.dockerignore.bak
+
+# Temporary files
+*.tmp
+*.temp
+.cache/
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db