Better social cards design

docs/requirements.txt

@@ -1,4 +1,5 @@
 mkdocs-material
 mkdocstrings
 mkdocstrings-python
-mkdocs-material[imaging]
+mkdocs-material[imaging]
+black

mkdocs.yml

@@ -109,7 +109,10 @@ markdown_extensions:
 
 plugins:
   - search
-  - social
+  - social:
+      cards_layout_options:
+        background_color: "#1f1f1f"
+        font_family: Roboto
   - mkdocstrings:
       handlers:
         python: