 A basic collapsible section.
  {{< /details >}}

  {{< details summary="Custom Summary Text" >}}
  Showing custom `summary` text.
  {{< /details >}}

  {{< details summary="Open Details" open=true >}}
  Contents displayed initially by using `open`.
  {{< /details >}}

  {{< details summary="Styled Content" class="my-custom-class" >}}
  Content can be styled with CSS by specifying a `class`.

  Target details element:

  ```css
  details.my-custom-class { }
  ```

  Target summary element:

  ```css
  detai