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cards-containers

Use when animating cards, panels, tiles, or container elements to create depth and interactivity

skills/07-by-ui-element/cards-containers/SKILL.md

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# Card & Container Animation Principles

Apply Disney's 12 principles to cards and containers for engaging, dimensional interfaces.

## Principles Applied to Cards

### 1. Squash & Stretch
Cards can subtly compress on drag-start and stretch when released. Keep it minimal: 2-3% scale change maximum.

### 2. Anticipation
Before expanding a card to detail view, briefly scale down (0.98) for 50ms, then expand. Prepares user for the transformation.

### 3. Staging
The card being interacted with should lift above others via `z-index` and shadow. Dim or blur background cards to focus attention.