# Surface

> A HeroUI surface — a themeable container that provides consistent background layering for cards, panels, and overlays. Supports default, secondary, and tertiary background levels plus a transparent variant for custom backgrounds.

- Author: [Hero Ui](https://21st.dev/@hero_ui)
- License: mit
- Tags: Card, Surface, Container
- npm dependencies: @heroui/react, @heroui/styles
- Live preview: https://21st.dev/@hero_ui/components/heroui-surface

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/hero_ui/heroui-surface?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/card.md