When a user checks off a part, the box doesn't simply fill, it bounces and the checkmark strokes itself in Together these two layers create a tactile, drawn sensation that confirms the action physically. The bounce anchors the interaction to the finger; the draw extends the satisfaction just past the tap.

The three signal rows don't appear together, they cascade in at 130ms intervals, each sliding up from 14px below and fading in. Each row's checkmark strokes in 200ms after the row itself settles. The verdict banner holds until all three checks have resolved (520ms), then rises last. The stagger turns a checklist into a narrative, the interface appears to evaluate each condition before delivering its recommendation. The "all clear" feels earned.