amend explanation of css file imports

Docs described styles imported into a component as being scoped to the component. This is not the current behavior. Imported styles become global without the use of CSS modules or other dependencies.

Author: Fake-User

src/routes/concepts/components/class-style.mdx

@@ -37,9 +37,8 @@ This is because they are not reusable, and they can be difficult to maintain ove
 The `class` attribute allows you to style one or more elements through CSS rules.
 This provides a more structured approach to styling, as it allows you to reuse styles across multiple elements.
 
-Classes are defined in CSS files, which are then imported into the component files that use them.
-You can import these files using the `import` statement at the top of your component file.
-Once imported into a component, the classes are scoped to that component and any of its children.
+Classes are defined in CSS files. You can import these files using the `import` statement at the top of your component file.
+The CSS file's contents will be inserted into a style tag in the document head.
 
 ```jsx
 import "./Card.css";