# Logo Carousel (Lumen Halo): prompt.md (v1.0.0)

- id: `lumen-logo-carousel` · version 1.0.0 · component · pro (All-Access)
- category: Marketing
- build: Base UI (one set of files; its dependencies follow the build)
- install (this build): `npx shadcn@latest add @beautiful-ui-pro/lumen-logo-carousel`
- npm dependencies: none
- registry dependencies: utils, https://beautiful-ui.dev/r/lumen-foundation.json
- docs: https://beautiful-ui.dev/components/lumen-logo-carousel
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

A "trusted by" strip: logos drift through a smoked band, dimmed, and whichever passes under the central lens lights to full. Pauses on hover and focus, fades at the edges, and holds still as a row under reduced motion. Screen readers hear each name once.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: none beyond React.
- Files: `components/ui/lumen/logo-carousel.tsx`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `lumen-foundation`.
- Builds: one set of files for both, but its dependencies come in Base UI and Radix builds. Install the one that matches the project (see Install): a free item's bare URL installs the Base UI build of it and its dependencies.
- Exports to keep: `LogoCarousel`, and every exported type.
- CSS: the install merges this item's rules (the registry `css` field) into your global stylesheet, in `@layer components`, and adds the lumen foundation (tokens, keyframes, motion levels) once. Nothing to import by hand.
- Re-running `add` (or `--overwrite`) re-applies those rules: put overrides in your own CSS, never in the installed rules.
- Tokens: retheme with the `--lumen-*` custom properties (`--lumen-accent`, `--lumen-accent-foreground`, `--lumen-accent-text`, `--lumen-bad`, `--lumen-bad-text`, `--lumen-chart-accent`, `--lumen-chart-accent-foreground`, `--lumen-chart-accent-text`, `--lumen-focus`, `--lumen-good`, `--lumen-good-text`, `--lumen-hairline`, `--lumen-ink`, `--lumen-muted-ink`, `--lumen-series-1`, `--lumen-series-2`, `--lumen-series-3`, `--lumen-series-4`, `--lumen-series-5`, `--lumen-series-6`, `--lumen-warn`, `--lumen-warn-text`); this item's CSS also reads `--lumen-radius-k`. Never add Tailwind colour classes inside the component.

```tsx
import { LogoCarousel } from "@/components/ui/lumen/logo-carousel";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `LogoCarousel` | `logo-carousel` | The strip, the lens and the loop. |

Style a part with `[data-slot="<slot>"]` selectors or its `className`; keep the attributes when editing.

## Sound
- Keep every `data-slot` and `data-sound` attribute: the sound layer reads them.
- Installing this item adds no audio. Nothing plays until the app mounts `GlassSoundProvider` once (install: `npx shadcn@latest add https://beautiful-ui.dev/r/glass-sound.json`, import from `@/components/beautiful-ui/glass-sound`); `GlassSoundToggle` is its mute control. Without a provider the audio engine never loads.

## Match the original
- Read `components/ui/lumen/logo-carousel.tsx` as the reference implementation before changing or recreating anything, and match it: sizes, colours per theme, motion timings, copy and behaviour.
- If you deviate (a prop you can't honour, a style you changed, a dependency you swapped), say so in your reply, part by part.
- Keep the accessibility contract, the keyboard map and the motion levels listed below.

## Use it when
- logo carousel, logo cloud, trusted by, customer logos, logo marquee, social proof, Lumen
- Showing the companies that use a product, on a landing or pricing page

### Not when
- More than about 12 logos: use a static grid
- Logos people need to compare or click through carefully

## Mistakes
- Use logos you have permission to show
- Keep logos about the same visual weight (32px tall by default)

## Usage

```tsx
import { LogoCarousel } from "@/components/ui/lumen/logo-carousel";

<LogoCarousel label="Trusted by" logos={[{ name: "Kitelabs", logo: <KitelabsLogo /> }, { name: "Orbitra", logo: <OrbitraLogo /> }]} />
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `logos` | `{ name: string; logo: ReactNode; href?: string }[]` |  | Each logo (an SVG or img) and its name; href makes it a link. |
| `speed` | `number` | `40` | Seconds for one full pass. |
| `direction` | `"left" \| "right"` | `"left"` | Drift direction. |
| `label` | `string` | `"Trusted by"` | Accessible name of the strip. |

Full docs: https://beautiful-ui.dev/components/lumen-logo-carousel

## Customising
- Colours: set the `--lumen-*` tokens on `:root`, or on a container with the `lumen-scope` class to retheme one area. Add the `lumen-inherit` class to follow your shadcn palette instead (`--chart-N`, `--destructive`).
- Dark mode follows the `.dark` class on an ancestor (the shadcn and next-themes convention).
- Update later by re-running the install with `--overwrite` (review the diff if you edited it). Changelog: https://beautiful-ui.dev/r/changelog.json

## Keyboard

| Keys | Action |
|---|---|
| Tab | Linked logos take focus; the strip pauses while one has it |

## Motion inventory

| Interaction | What moves |
|---|---|
| Drift | A slow linear pass; the logo under the lens lights to full |
| Hover / focus | Pauses |

## Accessibility contract (preserve when editing)
- A labelled region; each logo is named once (the looping copies are hidden from assistive tech)
- Pauses while hovered or focused; still under reduced motion

## Install

```bash
npx shadcn@latest add @beautiful-ui-pro/lumen-logo-carousel
```

Pro item: needs the `@beautiful-ui-pro` registry in `components.json` and `BEAUTIFUL_UI_TOKEN` in `.env.local` (https://beautiful-ui.dev/account). Setup: https://beautiful-ui.dev/docs/pro. Your components.json `style` picks the build: radix-*, new-york and default get Radix, base-* gets Base UI.

## Credits
- Built on shadcn/ui conventions (https://ui.shadcn.com)

The lumen foundation (the tokens listed above, keyframes and motion levels) installs once with the first component; its CSS is public at https://beautiful-ui.dev/r/lumen-foundation.json.