Update files/en-us/mdn/writing_guidelines/page_structures/page_types/…

…index.md

Co-authored-by: Estelle Weyl <estelle@openwebdocs.org>

files/en-us/mdn/writing_guidelines/page_structures/page_types/index.md

@@ -133,7 +133,7 @@ An **SVG reference page** lists all the attributes that are available on an SVG
 
 Every **[CSS](/en-US/docs/Web/CSS) module** links to a specification that provides support for certain features and implementations in CSS. For example, the specification linked to the [CSS box model](/en-US/docs/Web/CSS/CSS_box_model) module describes the margin and padding properties that let you create spacing in and around a CSS box.
 
-A **CSS module landing page** provides an overview of the features that the module provides and lists all the properties, data types, CSS functions, and so on offered by the module. The CSS module landing page also provides a quick demonstration of what can be achieved using the properties of the module through an interactive example.
+A **CSS module landing page** provides an overview of the features that the module provides and lists all the properties, data types, CSS functions, and so on offered by the module. When possible, the CSS module landing page also provides a quick demonstration of what can be achieved using the properties of the module through an interactive example.
 The module landing page serves primarily as a _navigation_ page, but also functions as an at-a-glance _reference_ page for the module.
 
 Some related properties and features that belong in other modules but are closely related to the functionality offered by the module you are documenting can also be covered in a _Related concepts_ section.