diff --git a/mkdocs.yml b/mkdocs.yml
index 175065a..9b77f9b 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -12,7 +12,14 @@ plugins:
   - search
   - git-authors
   - git-revision-date-localized
+  - mkdocs-plugin-open-external-links-in-new-tab:
+      external_extensions:
+        - ".pdf"
+        - ".zip"
 
 markdown_extensions:
   - pymdownx.superfences
-  - pymdownx.highlight
\ No newline at end of file
+  - pymdownx.highlight
+
+extra_css:
+  - stylesheets/extra.css
\ No newline at end of file