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Design the collapsed lock-screen state for a grouped notification stack from one app. It should read as a single bundle first, with enough signal to show that several updates are waiting inside.

Then design the expanded view after a tap, where each notification becomes an individual item in the stack. Keep the transition native to mobile system UI, not an app inbox.

The collapsed state needs to carry the app identity, the fact that items are grouped, and a sense of volume without exposing every detail. The expanded state should let the user scan the items quickly and tell them apart.

This is a lock-screen surface, so the design has to work in a constrained, glanceable context. The stack should feel compact when collapsed and orderly when expanded.