It would be impractical to put your entire app in a single component. Instead, we can import components from other files and include them as though we were including elements.
Add a `<script>` tag that imports `Nested.svelte`...
Notice that even though `Nested.svelte` has a `<p>` element, the styles from `App.svelte` don't leak in.
Also notice that the component name `Nested` is capitalised. This convention has been adopted to allow us to differentiate between user-defined components and regular HTML tags.