# Footer Docs CTA block

> Night Earth CTA banner with WebGL city lights turning on the globe beside light and outline buttons

Theme-independent closer (fixed oklch surface and ink) whose Earth is cropped past the right edge, drops under the copy when narrow and stays a still photo under reduced motion. shadcn Card, Button. Docs callout, footer CTA.

- Type: Pro block
- Category: [CTA](https://web.dev.reui.io/blocks/marketing/cta.md)
- Page: https://web.dev.reui.io/blocks/marketing/cta/cta-8
- MCP: `get_block("cta-8")`
- Built with: Button, Card
- Installs with a ReUI Pro or Ultimate license; setup: https://web.dev.reui.io/docs/license-setup

## Best for

A solid dark banner whose turning WebGL night Earth bleeds off the right edge and drops under the copy when narrow

## Agent notes

- `EARTH` is one Unsplash photo used as both the still `img` and the `Planet` texture; a new photo also needs `DISC` retuned in planet.tsx
- `SURFACE`, `HEADLINE` and `BODY` are fixed oklch colors, so the banner stays dark in light mode; change those constants to retheme

## When not to use

- A translucent glass panel that blurs a star field and a sun behind the copy: use [Space Launch CTA](https://web.dev.reui.io/blocks/marketing/cta/cta-9.md) (`get_block("cta-9")`)
- A split pitch with a picture panel, a feature strip and a Badge eyebrow: use [Feature Strip CTA](https://web.dev.reui.io/blocks/marketing/cta/cta-2.md) (`get_block("cta-2")`)

## Install

```bash
npx shadcn@latest add @reui/cta-8
```

## About CTA blocks

### When to use

- A closing get started band with a headline and 1 or 2 actions, some backed by logos, avatars or a rating
- Email capture for a newsletter, a waitlist or release updates, with an inline email field and submit button
- A sales prompt that books a call or opens a contact route rather than a self-serve signup

### When not to use

- The first screen of a page, with the main headline and a product console above the fold: use the [Hero blocks](https://web.dev.reui.io/blocks/marketing/hero.md)
- A compact promo tile with 1 button, sized to sit beside other cards in an app page: use the [Card blocks](https://web.dev.reui.io/blocks/application/card.md)
- A sign in or sign up page with a password, a magic link or social provider buttons: use the [Auth blocks](https://web.dev.reui.io/blocks/application/auth.md)

### Agent notes

- The headline and every action label are written inline in `Cta` in components/cta.tsx, never in a data file; rewrite them there
- No action is wired: every `href` is a placeholder hash and no email form reaches a backend; connect real routes and a submit handler

Every ReUI item has a twin like this one; the index is https://web.dev.reui.io/llms.txt. Agents with the ReUI MCP (https://web.dev.reui.io/docs/mcp) get the same guidance from the getters named above.