Setting shadow on detail page in MasterDetailPage

I am trying to recreate this UI.

Screenshot

I'm using a MasterDetailPage. In the existing app the background of the master page and the detail page are white. To separate them, the detail page has a shadow around it.

The detail page also needs to be a NavigationPage.

I noticed the Frame has a HasShadow property.

If I make my detail page a ContentPage with a Frame I can get the shadow effect. However, I can't put a NavigationPage as a child of a Frame.

If I make my detail page a NavigationPage, any Frame in it doesn't also surround the titlebar.

Any suggestions?