diff --git a/.gitignore b/.gitignore
index d1b3b07..ca56b1c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,27 +1,29 @@
-# Visual Studio (Windows) solution metadata
-.vs/
-.vscode/
-
-# Python (MkDocs, scripts/build_guide_pdf.py)
-__pycache__/
-*.py[cod]
-*$py.class
-.venv/
-venv/
-env/
-ENV/
-.env
-
-# Cache
-.cache/
-
-# MkDocs build output and local PDF export
-site/
-_site/
-_site_test/
-build/
-
-# Export directory - but track hash files and signatures
-export/thgtoa.pdf.sha256
-export/thgtoa-dark.pdf.sha256
-*.sig
+# Visual Studio (Windows) solution metadata
+.vs/
+.vscode/
+
+# Python (MkDocs, scripts/build_guide_pdf.py)
+__pycache__/
+*.py[cod]
+*$py.class
+.venv/
+venv/
+env/
+ENV/
+.env
+
+# Cache
+.cache/
+
+# MkDocs build output and local PDF export
+site/
+_site/
+_site_test/
+build/
+
+# Export directory - but track hash files and signatures
+export/thgtoa.pdf.sha256
+export/thgtoa-dark.pdf.sha256
+export/thgtoa.pdf.b2
+export/thgtoa-dark.pdf.b2
+*.sig