fix(docs): Add section on customization of the styling

readme/limitless-ui-react.md

@@ -225,6 +225,12 @@ The headless components can be combined with the optional style bundle and to ge
 'out-of-the-box' experience. Simply import `style.css` from the package in your projects preferred
 way.
 
+### Customizing styling
+
+One can of course add styling to specific classes added in the templates of the components like
+`<SearchBox>`. There are also a set of css properties, e.g. `--lui-search-box-min-height`, that can
+be set to a different value than their defaults.
+
 ## Troubleshooting
 
 If you encounter issues: