# Popover (Lumen Halo): prompt.md (v1.0.0)

- id: `lumen-popover` · version 1.0.0 · component · pro (All-Access)
- category: Overlays
- build: Base UI (this item also ships a Radix build)
- install (this build): `npx shadcn@latest add @beautiful-ui-pro/lumen-popover`
- npm dependencies: @base-ui/react@^1
- registry dependencies: utils, https://beautiful-ui.dev/r/lumen-foundation.json
- docs: https://beautiful-ui.dev/components/lumen-popover
- The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand.

A small pane of smoked glass that grows from its trigger, for quick settings and details without leaving the page. shadcn's Popover, cut from Lumen glass.

## Build it
- Stack: React 19 (`ref` is a plain prop), TypeScript, Tailwind CSS v4 utilities, a shadcn-initialised project with the `@/*` alias.
- Packages: `@base-ui/react@^1` (Base UI build); `radix-ui@^1` (Radix build).
- Files: `components/ui/lumen/popover.tsx`; shared code: `lib/beautiful-ui/lumen/portal.ts`.
- Registry dependencies, installed with it automatically: shadcn `utils` (cn), `lumen-foundation`.
- Builds: separate Base UI and Radix files. 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: `Popover`, `PopoverTrigger`, `PopoverContent`, `PopoverHeader / PopoverTitle / PopoverDescription`, 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-font-sans`, `--lumen-radius-k`. Never add Tailwind colour classes inside the component.

```tsx
import { Popover, PopoverContent, PopoverDescription, PopoverHeader, PopoverTitle, PopoverTrigger } from "@/components/ui/lumen/popover";
```

## Parts

| Part | data-slot | What it is for |
|---|---|---|
| `Popover` | `popover` | Root. |
| `PopoverTrigger` | `popover-trigger` | Opens it. |
| `PopoverContent` | `popover-content` | The glass pane. |
| `PopoverHeader / PopoverTitle / PopoverDescription` | `popover-header` | The heading. |

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/popover.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
- popover, dropdown panel, flyout, quick settings, shadcn popover, Lumen
- Quick settings or details anchored to a control
- A drop-in for shadcn's Popover

### Not when
- A list of actions: use Dropdown Menu
- A hint on hover: use Tooltip

## Mistakes
- Don't nest popovers

## Usage

```tsx
import { Popover, PopoverContent, PopoverDescription, PopoverHeader, PopoverTitle, PopoverTrigger } from "@/components/ui/lumen/popover";

<Popover>
  <PopoverTrigger>Share</PopoverTrigger>
  <PopoverContent>
    <PopoverHeader>
      <PopoverTitle>Share link</PopoverTitle>
      <PopoverDescription>Anyone with the link can view.</PopoverDescription>
    </PopoverHeader>
  </PopoverContent>
</Popover>
```

## Props

| Prop | Type | Default | What it does |
|---|---|---|---|
| `PopoverContent side / align / sideOffset` | `placement` | `"bottom" / "center" / 6` | Where it sits. |

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

## 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 |
|---|---|
| Escape | Close |

## Motion inventory

| Interaction | What moves |
|---|---|
| Open | Grows from the trigger on the spring |
| Close | A quick fade |

## Accessibility contract (preserve when editing)
- Focus moves in and returns to the trigger
- Escape closes it

## Install

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

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 (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.