markdown fixes, docs styling

_config.yml

@@ -12,6 +12,7 @@ dark-theme: false
 
 plugins:
   - jekyll-random
+  - jekyll-toc
   - jekyll-tidy
   - jekyll-timeago
   - jekyll-redirect-from
@@ -100,22 +101,20 @@ keep_files:
   - css/ui-kit.css
   - css/dark.css
   - css/rtl.css
-#- js/ui-kit.js
 
 markdown: kramdown
-highlighter: rouge
-
 kramdown:
+  input: GFM
   syntax_highlighter: rouge
-  syntax_highlighter_opts:
-    css_class: ''
-    span:
-      line_numbers: false
 
 jekyll_tidy:
   compress_html: false
   ignore_env: development
 
+toc:
+  min_level: 2
+  max_level: 2
+  list_class: list-unstyled
 
 #collections:
 #  docs: