# Letterbox (`.sds-card-letterbox`)

Cinematic black bars part vertically while card content scales 1.04 → 1. Cards animation in SDS Motion Forge v5.0.0. It plays once as soon as the class is applied.

- Page: https://sds-motion-forge.netlify.app/animations/card-letterbox/
- Category: Cards (https://sds-motion-forge.netlify.app/categories/cards/)
- Animated properties: clip-path, transform
- Compositor-only: yes
- Needs child elements: no
- Needs per-character spans: no
- JavaScript: none required

## Use it

```html
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@salkomdesignstudio/sds-motion-forge/dist/categories/cards.min.css" />

<div class="sds-card-letterbox">Card</div>
```

## How it works

Plays once, as soon as the class is applied. It animates a clip-path mask and movement and scale (transform) — compositor-only, so it never causes page reflow. Timing is fixed for this effect, but you can still override animation-duration/timing-function on the element.

## Related

- [Iris Bloom](https://sds-motion-forge.netlify.app/animations/card-iris-bloom/)
- [Layers](https://sds-motion-forge.netlify.app/animations/card-layers/)
- [Lens Bulge](https://sds-motion-forge.netlify.app/animations/card-lens-bulge/)
- [Levitate](https://sds-motion-forge.netlify.app/animations/card-levitate/)
- [Liquid Border](https://sds-motion-forge.netlify.app/animations/card-liquid-border/)
- [Magnetic Hover](https://sds-motion-forge.netlify.app/animations/card-magnetic/)