Problem:

Currently, when viewing all open tabs in the app (triggered by tapping on the tabs icon in the toolbar), the illusion of the article tab layers stack is overly complex, as it is being created by using 3 separate elements (The tab header, the shadow behind the corner radii of the header, and article tab shadow):

This is further compounded when different colors are required for dark vs light mode.

Proposed solution

Simplify the visual representation of the article tab stack to using one layer per open tab, with a standard shadow effect applied to the layer across all color themes.

Note there is only one layer per article 'tab', with the same elevation of 8dp casting a Black@26% shadow.

Per T112980 - entire tab in exploded tabs view should be movable