# Lightbox

> Wrap an article and every picture in it opens large: it grows from its own place to the screen, arrows or a swipe go to the next, and it returns to its place on Escape.

Media · lightbox, image, article, zoom · HTML, CSS, vanilla JS · no dependencies · updated 2026-10-16
Demo: https://kodza.dev/components/lightbox/

Takes the whole screen (or reacts to the page scroll): give it a page, not a small box.

## Files

The code below, served as files: byte for byte what the Kodza site copies (the CSS includes its theme guard).

- [`kodza-lightbox.css`](https://kodza.dev/registry/lightbox/kodza-lightbox.css) · 11.3 KB
- [`kodza-lightbox.js`](https://kodza.dev/registry/lightbox/kodza-lightbox.js) · 12.1 KB
- [`kodza-lightbox.html`](https://kodza.dev/registry/lightbox/kodza-lightbox.html) · 0.6 KB · the markup, to adapt and paste into your page

**Can you run shell commands? Download the CSS and the JS, don't retype them.** Retyping costs thousands of tokens and can drop or change lines of the CSS. Put the files where your stack expects them (Use it says where: change the `-o` paths):

```bash
curl -fsSL --create-dirs -o kodza/kodza-lightbox.css https://kodza.dev/registry/lightbox/kodza-lightbox.css
curl -fsSL --create-dirs -o kodza/kodza-lightbox.js https://kodza.dev/registry/lightbox/kodza-lightbox.js
```

Then load the files from your page as Use it shows, instead of pasting the content. The HTML is the part you adapt (text, links, modifiers): paste it from the Code section. Copy the CSS and the JS from the Code section only if you can't run commands, exactly as they are. (Windows PowerShell: `curl.exe`.)

## API

- Root: `.kodza-lightbox`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-lightbox-shade: rgba(10, 10, 10, 0.9)`
  - `--kz-lightbox-fg: #ffffff`
  - `--kz-lightbox-muted: rgba(255, 255, 255, 0.62)`
  - `--kz-lightbox-soft: rgba(255, 255, 255, 0.1)`
  - `--kz-lightbox-radius: 12px`
  - `--kz-lightbox-ease: cubic-bezier(0.22, 1, 0.36, 1)`
- Attributes:
  - `data-full` (e.g. `https://kodza.dev/media/kz-steps-2400.webp`, `https://kodza.dev/media/kz-arch-2400.webp`, `https://kodza.dev/media/kz-columns-2400.webp`)
  - `data-no-lightbox`
  - `data-step`
- Lifecycle: `kodza:init` / `kodza:destroy` on `document`, with `{ detail: { root } }` to target a container.

## Keyboard

What each key does, by where the focus is. Keep it working when you adapt the HTML: same elements, same classes.

- In the viewer (focus in `.kodza-lightbox__viewer`):
  - `ArrowRight` / `ArrowLeft`: Next or previous picture, round and round
  - `Escape`: Closes it, the picture goes back to its place

## Dark mode

Nothing to set: it takes its colours from the text around it, or looks the same on a light and a dark page.

Its images have dark versions next to them (`kz-steps-1400.webp` → `kz-steps-dark-1400.webp`). To swap them on a dark page: `<picture><source media="(prefers-color-scheme: dark)" srcset="…-dark-….webp"><img …></picture>`.

## Use it

### Plain HTML page

- CSS: `kodza/kodza-lightbox.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-lightbox.css">`. Without a shell, paste it in a `<style>` in `<head>` instead. It only touches `kodza-` classes.
- HTML: where the component goes. Paste it as many times as you need: instances never interfere.
- JS: `kodza/kodza-lightbox.js`, loaded with `<script src="kodza/kodza-lightbox.js" defer></script>` in `<head>`. Without a shell, paste it in a `<script>` before `</body>` (or in `<head>`: it waits for the page). One copy per page, whatever the number of instances.
- Restyle with the `--kz-…` variables, set on the component's root element itself (the root declares its own defaults, so a value on an ancestor is ignored), and with the modifiers / attributes listed under API.
- Font: it takes the page's own. The Kodza look is Geist: `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap">`.
- Content added later (AJAX navigation, a SPA route, a builder preview): start it with `document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: container } }))`; before removing it, the same call with `'kodza:destroy'` stops it and puts the original markup back.

### Claude artifact (claude.ai)

- Paste the CSS in a `<style>` and the JS in a `<script>` at the end, in the artifact itself: it loads stylesheets only from Google Fonts and scripts only from a few CDNs, so no `<link>` or `<script src>` to Kodza.
- Writing the artifact file with a shell? Insert the downloaded files (Files) with a command instead of retyping them: a line `KODZA-CSS` alone inside the `<style>`, `KODZA-JS` inside the `<script>`, then `sed -e '/^KODZA-CSS$/{r kodza/kodza-lightbox.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-lightbox.js' -e 'd' -e '}' page.html > artifact.html`.
- Font: load Geist from Google Fonts (allowed): `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Geist:wght@400;500;600;700&family=Geist+Mono:wght@400;500&display=swap">`.
- Images: the artifact blocks every other host, `kodza.dev` included, without an error. Embed each one as a `data:` URI, with a command if you can run one (`curl -s <url> | base64`; the 1400 px files weigh 10 to 30 KB), never by typing base64 out. If you can't run commands, keep the `<img>` with its `width` and `height`, and tell the user the picture stays blank inside the artifact.
- Dark mode: the viewer sets `data-theme="dark"` or `"light"` on `<html>`, or nothing when it follows the system. Write the Dark mode rules twice: inside `@media (prefers-color-scheme: dark)` with `:root:not([data-theme="light"])` in front of each selector, and with `:root[data-theme="dark"]` in front of each selector.

### WordPress

- HTML: a **Custom HTML** block (or a pattern / template part). WordPress keeps this markup as it is only for users allowed to post unfiltered HTML (Administrators; Super Admins on multisite): for anyone else it strips tags such as `<svg>`, `<input>` or `<dialog>`, so add it from the theme (a pattern or template part) instead.
- CSS and JS: the downloaded files go in the theme, under `wp-content/themes/<your-theme>/kodza/` (the child theme if there is one), enqueued from its functions.php (or a code-snippets plugin):
  ```php
  add_action('wp_enqueue_scripts', function () {
    $dir = get_stylesheet_directory() . '/kodza/';
    $uri = get_stylesheet_directory_uri() . '/kodza/';
    wp_enqueue_style('kodza-lightbox', $uri . 'kodza-lightbox.css', [], filemtime($dir . 'kodza-lightbox.css'));
    wp_enqueue_script('kodza-lightbox', $uri . 'kodza-lightbox.js', [], filemtime($dir . 'kodza-lightbox.js'), true);
  });
  ```
  Scoped to `kodza-` classes, the CSS never touches the theme. One copy of the JS, whatever the number of blocks.
- No access to the theme files? The CSS can also go, as it is, in **Appearance → Customize → Additional CSS** (classic theme) or **Styles → Additional CSS** in the Site Editor (block theme).
- Theme with AJAX page transitions: fire `kodza:init` on the new content after each swap (and `kodza:destroy` on the old one).
- Performance plugin (WP Rocket, LiteSpeed Cache, Perfmatters…) with **Delay JavaScript execution** turned on: add `kodza` to the scripts it must not delay. Otherwise the component waits for the visitor's first scroll, tap or mouse move, and that first click can be lost.
- Colours: it takes the colour of the text around it (or keeps its own monochrome): nothing to point at the theme.
- WordPress turns straight quotes and `--` into typographic ones in the text of a Custom HTML block (not inside `<code>` or `<pre>`).

#### With Elementor

- HTML: an **HTML** widget (Elementor shows it to administrators only). It keeps the code exactly as pasted, straight quotes included.
- CSS and JS: as above. Elementor's Site Settings → Theme Style styles every button, field, link and image of the page, components included; the theme guard at the end of the CSS keeps the component's buttons, fields and link colours as they are.
- The Elementor editor redraws each widget after the page has loaded: without the script below, the component stays still in the editor preview (the published page works). Add it once per site, in the footer like the component's script (`kodza/elementor-editor.js`, or a code-snippets plugin):

```js
// Kodza in the Elementor editor: the editor redraws each HTML widget after the page has loaded.
// Start Kodza in what it draws, stop it in what it replaces or removes. Once per site.
window.addEventListener('elementor/frontend/init', () => {
  if (!elementorFrontend.isEditMode()) return;
  class KodzaWidget extends elementorModules.frontend.handlers.Base {
    onInit() {
      super.onInit();
      this.kodza = [...this.$element[0].children];
      document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: this.$element[0] } }));
    }
    onDestroy() {
      super.onDestroy();
      this.kodza.forEach((root) => document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } })));
    }
  }
  elementorFrontend.elementsHandler.attachHandler('html', KodzaWidget);
});
```

- No child theme: everything can go in the HTML widget instead, `<style>` with the CSS, the HTML, then `<script>` with the JS. It works on the page and in the editor without the script above.

### Shopify

- Files: `assets/kodza-lightbox.css` and `assets/kodza-lightbox.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-lightbox.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-lightbox.js' | asset_url }}" defer></script>`, then the HTML.
- The theme editor re-renders sections: restart them with
  `document.addEventListener('shopify:section:load', (e) => document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root: e.target } })));`
  and the same with `shopify:section:unload` → `kodza:destroy`.

### React / Next.js

- Files, side by side (e.g. in `components/kodza/`): `Lightbox.tsx` (below), the CSS block under Code saved as `lightbox.css` and the JS block as `lightbox.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { Lightbox } from '@/components/kodza/Lightbox';` then `<Lightbox />`. Props: `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-lightbox-shade': … }}`), `className`, `style` and the other props of its `<div>` (`onClick`, `aria-…`).
- Next.js App Router: it is a Client Component already (`'use client'`). Pages Router: Next.js takes global CSS only in `pages/_app`, so move the `import './lightbox.css'` line there.
- Safe under StrictMode, client-side navigation and prop changes: when a prop changes, the `key` gives React a fresh element, `kodza:destroy` stops the script on the old one and `kodza:init` starts it on the new one.

```tsx
'use client';
// Kodza — Lightbox, for React. From https://kodza.dev/components/lightbox/
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Next to this file: lightbox.css and lightbox.js, the component's CSS and JS from Kodza, as they are.
// Yours to edit: the markup is plain JSX below.
// The script changes this markup once React has rendered it (it adds layers, splits text, moves
// nodes), so React must not patch it afterwards. When a prop changes, the key gives React a fresh
// element: kodza:destroy stops the script on the old one, kodza:init starts it on the new one.
import { useRef, useEffect, type ComponentPropsWithoutRef, type ComponentRef, type CSSProperties } from 'react';
import './lightbox.css';

export type LightboxProps = Omit<ComponentPropsWithoutRef<'div'>, "children" | "vars"> & {
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: rgba(10, 10, 10, 0.9) */
    "--kz-lightbox-shade"?: string | number;
    /** default: #ffffff */
    "--kz-lightbox-fg"?: string | number;
    /** default: rgba(255, 255, 255, 0.62) */
    "--kz-lightbox-muted"?: string | number;
    /** default: rgba(255, 255, 255, 0.1) */
    "--kz-lightbox-soft"?: string | number;
    /** default: 12px */
    "--kz-lightbox-radius"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-lightbox-ease"?: string | number;
  };
  className?: string;
};

export function Lightbox({ vars, className, style, ...rest }: LightboxProps) {
  const ref = useRef<ComponentRef<'div'>>(null);
  const classes = ["kodza-lightbox", className].filter(Boolean).join(' ');
  // Everything the markup is made of: when it changes, React gets a fresh element (see the top)
  const key = JSON.stringify([classes, vars, style, rest]);

  // Starts the script on this element once React has rendered it, stops it when it goes
  useEffect(() => {
    const root = ref.current;
    let live = true;
    // @ts-ignore: a plain script, no types to find
    import('./lightbox.js').then(() => {
      if (live) document.dispatchEvent(new CustomEvent('kodza:init', { detail: { root } }));
    });
    return () => {
      live = false;
      document.dispatchEvent(new CustomEvent('kodza:destroy', { detail: { root } }));
    };
  }, [key]);

  return (
    <div key={key} {...rest} className={classes} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <img src="https://kodza.dev/media/kz-steps-1400.webp" data-full="https://kodza.dev/media/kz-steps-2400.webp" alt="Concrete steps climbing towards the light" width="1400" height="933" />
      {' '}
      <img src="https://kodza.dev/media/kz-arch-1400.webp" data-full="https://kodza.dev/media/kz-arch-2400.webp" alt="A concrete wall with a round-topped opening" width="1400" height="1400" />
      {' '}
      <img src="https://kodza.dev/media/kz-columns-1400.webp" data-full="https://kodza.dev/media/kz-columns-2400.webp" alt="A row of concrete columns casting long shadows" width="1120" height="1400" />
    </div>
  );
}
```

## Code

```html
<div class="kodza-lightbox">
  <img src="https://kodza.dev/media/kz-steps-1400.webp" data-full="https://kodza.dev/media/kz-steps-2400.webp" alt="Concrete steps climbing towards the light" width="1400" height="933" />
  <img src="https://kodza.dev/media/kz-arch-1400.webp" data-full="https://kodza.dev/media/kz-arch-2400.webp" alt="A concrete wall with a round-topped opening" width="1400" height="1400" />
  <img src="https://kodza.dev/media/kz-columns-1400.webp" data-full="https://kodza.dev/media/kz-columns-2400.webp" alt="A row of concrete columns casting long shadows" width="1120" height="1400" />
</div>
```

```css
/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Lightbox
   Wrap an article (or any content) in .kodza-lightbox and every picture in it opens large:
   it grows from its own place to the whole screen, the others are a swipe or an arrow key
   away, and it goes back to its place on Escape, a click, a scroll or a swipe down. Pictures
   inside a link, or with data-no-lightbox, are left alone. data-full gives a sharper file.
   It is a real dialog element: focus stays inside and comes back after.
   Everything is tuned with the --kz-lightbox-* variables. */
.kodza-lightbox {
  --kz-lightbox-shade: rgba(10, 10, 10, 0.9);
  --kz-lightbox-fg: #ffffff;
  --kz-lightbox-muted: rgba(255, 255, 255, 0.62);
  --kz-lightbox-soft: rgba(255, 255, 255, 0.1);
  --kz-lightbox-radius: 12px;
  --kz-lightbox-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* The pictures in the article: a button each, the picture as it was */
.kodza-lightbox__trigger {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: var(--kz-lightbox-radius);
  background: none;
  cursor: zoom-in;
  transition: transform 0.4s var(--kz-lightbox-ease);
}

.kodza-lightbox__trigger img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: inherit;
}

.kodza-lightbox__trigger:active {
  transform: scale(0.99);
}

.kodza-lightbox__trigger:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
}

/* While open, the picture in the article is held by the viewer */
.kodza-lightbox__trigger.is-away img {
  visibility: hidden;
}

/* The viewer: the whole screen, a shade, the picture, a bar */
.kodza-lightbox__viewer {
  /* A modal dialog sits on the screen itself: 100% is the screen */
  width: 100%;
  max-width: none;
  height: 100%;
  max-height: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
  background: none;
  color: var(--kz-lightbox-fg);
}

.kodza-lightbox__viewer::backdrop {
  background: none;
}

.kodza-lightbox__shade {
  position: absolute;
  inset: 0;
  background: var(--kz-lightbox-shade);
  /* The page behind is blurred out of reading, not just darkened */
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.kodza-lightbox__image {
  position: fixed;
  max-width: none;
  margin: 0;
  border-radius: 6px;
  transform-origin: 0 0;
  cursor: zoom-out;
  user-select: none;
  -webkit-user-drag: none;
  touch-action: none;
}

.kodza-lightbox__bar {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px 22px;
}

.kodza-lightbox__caption {
  display: grid;
  min-width: 0;
  overflow: hidden;
  font-size: 14px;
}

.kodza-lightbox__caption > span,
.kodza-lightbox__count > span {
  grid-area: 1 / 1;
  white-space: nowrap;
}

.kodza-lightbox__caption > span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.kodza-lightbox__count {
  display: inline-grid;
  overflow: hidden;
  color: var(--kz-lightbox-muted);
  font-family: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
}

.kodza-lightbox__nav {
  display: flex;
  flex: none;
  align-items: center;
  gap: 8px;
}

.kodza-lightbox__button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--kz-lightbox-soft);
  color: inherit;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.kodza-lightbox__button:hover {
  background: rgba(255, 255, 255, 0.18);
}

.kodza-lightbox__button:active {
  transform: scale(0.94);
}

.kodza-lightbox__button:focus-visible {
  outline: 2px solid var(--kz-lightbox-fg);
  outline-offset: 2px;
}

.kodza-lightbox__button svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.kodza-lightbox__close {
  position: absolute;
  top: 18px;
  right: 18px;
}

.kodza-lightbox__viewer.is-single .kodza-lightbox__nav,
.kodza-lightbox__viewer.is-single .kodza-lightbox__count {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-lightbox__trigger,
  .kodza-lightbox__button {
    transition-duration: 0.01ms !important;
  }
}

/* kodza-guard 3e080b9876c0 — generated by Kodza, do not edit.
   Theme guard: keeps a site's own CSS (WordPress themes, Bootstrap, CSS resets…) off this
   component. :not(#_) is always true and weighs as much as an id, so these lines win over
   theme rules made of classes and tags. Customise the component through its --kz-* variables. */

/* What the browser gives, where the component sets it only in some states: at the lowest weight, so its own rules below put it back */

:where(.kodza-lightbox__trigger):not(#_) {
  outline: revert;
  outline-offset: revert;
}

:where(.kodza-lightbox__button):not(#_) {
  outline: revert;
  position: revert;
  outline-offset: revert;
}

/* What the browser gives, on everything the component leaves to it */

.kodza-lightbox:not(#_),
.kodza-lightbox__shade:not(#_),
.kodza-lightbox__bar:not(#_),
.kodza-lightbox__nav:not(#_),
.kodza-lightbox__count:not(#_),
.kodza-lightbox__caption span:where(:not([class*="kodza-"])):not(#_),
.kodza-lightbox__count span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-lightbox__trigger:not(#_) {
  margin: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-lightbox__viewer:not(#_) {
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-lightbox__caption:not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-lightbox__button:not(#_) {
  margin: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-lightbox__trigger img:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-lightbox__button svg:where(:not([class*="kodza-"])):not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  color: revert;
  font-family: revert;
  font-size: revert;
  font-weight: revert;
  font-style: revert;
  line-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-lightbox__viewer:not(#_):where(:not([hidden])),
.kodza-lightbox__button svg:where(:not([class*="kodza-"])):not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-lightbox__viewer:not(#_):where([hidden]),
.kodza-lightbox__button svg:where(:not([class*="kodza-"])):not(#_):where([hidden]) {
  display: none;
}

/* The component's own rules, one step stronger: real buttons and fields, what it sets on tags themes style (links, lists, headings, images…), and the root width (a theme may narrow it, never widen it) */

.kodza-lightbox__trigger:not(#_) {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: var(--kz-lightbox-radius);
  background: none;
  cursor: zoom-in;
  transition: transform 0.4s var(--kz-lightbox-ease);
}

.kodza-lightbox__trigger img:not(#_) {
  display: block;
  border-radius: inherit;
}

.kodza-lightbox__trigger:active:not(#_) {
  transform: scale(0.99);
}

.kodza-lightbox__trigger:focus-visible:not(#_) {
  outline: 2px solid currentColor;
  outline-offset: 4px;
}

.kodza-lightbox__viewer:not(#_) {
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: var(--kz-lightbox-fg);
}

.kodza-lightbox__caption:not(#_) {
  display: grid;
  font-size: 14px;
}

.kodza-lightbox__button:not(#_) {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--kz-lightbox-soft);
  color: inherit;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.kodza-lightbox__button:hover:not(#_) {
  background: rgba(255, 255, 255, 0.18);
}

.kodza-lightbox__button:active:not(#_) {
  transform: scale(0.94);
}

.kodza-lightbox__button:focus-visible:not(#_) {
  outline: 2px solid var(--kz-lightbox-fg);
  outline-offset: 2px;
}

.kodza-lightbox__close:not(#_) {
  position: absolute;
  top: 18px;
  right: 18px;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-lightbox__trigger:not(#_),
  .kodza-lightbox__button:not(#_) {
    transition-duration: 0.01ms !important;
  }
}
```

```js
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Kodza — Lightbox
// Turns each picture of the content into a button, and opens a <dialog> where the picture
// grows from its own place to fit the screen (the sharper data-full swaps in once loaded).
// Arrows, buttons or a swipe move to the next one; Escape, a click, a scroll or a swipe down
// send it back to its place. Screen readers hear the caption and "2 of 3".
(() => {
  const SELECTOR = '.kodza-lightbox';
  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  const ease = 'cubic-bezier(0.22, 1, 0.36, 1)';
  const icon = (d) => `<svg viewBox="0 0 16 16" aria-hidden="true"><path d="${d}"/></svg>`;

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const triggers = [...root.querySelectorAll('img')]
      .filter((img) => !img.closest('a, button') && !img.hasAttribute('data-no-lightbox'))
      .map((img) => {
        const button = document.createElement('button');
        button.type = 'button';
        button.className = 'kodza-lightbox__trigger';
        button.setAttribute('aria-label', `Enlarge: ${img.alt || 'picture'}`);
        img.replaceWith(button);
        button.append(img);
        return button;
      });
    if (!triggers.length) return;

    // The viewer
    const viewer = document.createElement('dialog');
    viewer.className = 'kodza-lightbox__viewer';
    viewer.setAttribute('aria-label', 'Picture viewer');
    viewer.innerHTML = `<div class="kodza-lightbox__shade"></div>
      <div class="kodza-lightbox__bar">
        <p class="kodza-lightbox__caption" aria-live="polite"><span></span></p>
        <div class="kodza-lightbox__nav">
          <span class="kodza-lightbox__count" aria-hidden="true"><span></span></span>
          <button class="kodza-lightbox__button" type="button" data-step="-1" aria-label="Previous picture">${icon('M10 3.5 5.5 8l4.5 4.5')}</button>
          <button class="kodza-lightbox__button" type="button" data-step="1" aria-label="Next picture">${icon('M6 3.5 10.5 8 6 12.5')}</button>
        </div>
      </div>
      <button class="kodza-lightbox__button kodza-lightbox__close" type="button" aria-label="Close">${icon('M4 4l8 8M12 4l-8 8')}</button>`;
    root.append(viewer);
    viewer.classList.toggle('is-single', triggers.length < 2);
    const shade = viewer.querySelector('.kodza-lightbox__shade');
    const bar = viewer.querySelector('.kodza-lightbox__bar');
    const close = viewer.querySelector('.kodza-lightbox__close');
    const caption = viewer.querySelector('.kodza-lightbox__caption');
    const count = viewer.querySelector('.kodza-lightbox__count');
    let index = 0;
    let image = null;
    let closing = false;
    let opened = 0;
    let wheeled = 0;

    const textOf = (i) => {
      const img = triggers[i].querySelector('img');
      return img.closest('figure')?.querySelector('figcaption')?.textContent.trim() || img.alt || '';
    };

    // Where the picture fits on screen: room kept for the close button above and the bar below
    const fit = (img) => {
      const ratio = (img.naturalWidth || img.width) / (img.naturalHeight || img.height) || 1;
      const above = 68;
      const below = 84;
      const w = innerWidth - 48;
      const h = innerHeight - above - below;
      const width = Math.min(w, h * ratio);
      const height = width / ratio;
      return { left: (innerWidth - width) / 2, top: above + (h - height) / 2, width, height };
    };
    const place = (el, box) => Object.assign(el.style, { left: `${box.left}px`, top: `${box.top}px`, width: `${box.width}px`, height: `${box.height}px` });
    // The transform that puts a box of the screen onto a picture of the article
    const from = (box, rect) => `translate(${rect.left - box.left}px, ${rect.top - box.top}px) scale(${rect.width / box.width}, ${rect.height / box.height})`;

    // A word that rolls: the old one up, the new one from below (or the other way)
    const roll = (el, text, dir) => {
      const old = el.lastElementChild;
      if (old.textContent === text) return;
      // On opening (no direction) or without motion, the word simply changes in place
      if (reduceMotion || !dir) {
        old.textContent = text;
        return;
      }
      const next = Object.assign(document.createElement('span'), { textContent: text });
      el.append(next);
      const timing = { duration: 420, easing: ease };
      old.animate([{ transform: 'none', opacity: 1 }, { transform: `translateY(${-dir * 100}%)`, opacity: 0 }], { ...timing, fill: 'forwards' }).finished.then(() => old.remove());
      next.animate([{ transform: `translateY(${dir * 100}%)`, opacity: 0 }, { transform: 'none', opacity: 1 }], timing);
    };
    const label = (dir) => {
      roll(caption, textOf(index), dir);
      roll(count, `${index + 1} / ${triggers.length}`, dir);
    };

    const make = (i) => {
      const source = triggers[i].querySelector('img');
      const img = new Image();
      img.className = 'kodza-lightbox__image';
      img.alt = source.alt;
      img.src = source.currentSrc || source.src;
      img.width = source.naturalWidth || source.width;
      img.height = source.naturalHeight || source.height;
      const full = source.dataset.full;
      if (full) {
        const sharp = new Image();
        sharp.onload = () => (img.src = full);
        sharp.src = full;
      }
      return img;
    };

    // Fades that stayed at their end (fill forwards) after a close are let go before reopening
    const settle = () => [shade, bar, close].forEach((el) => el.getAnimations().forEach((animation) => animation.cancel()));

    const open = (i) => {
      wheeled = 0;
      index = i;
      closing = false;
      opened = Date.now();
      settle();
      image = make(i);
      const box = fit(image);
      place(image, box);
      shade.after(image);
      viewer.showModal();
      triggers[i].classList.add('is-away');
      label(0);
      if (reduceMotion) return;
      const rect = triggers[i].querySelector('img').getBoundingClientRect();
      image.animate([{ transform: from(box, rect), borderRadius: '12px' }, { transform: 'none', borderRadius: '6px' }], { duration: 620, easing: ease });
      shade.animate([{ opacity: 0 }, { opacity: 1 }], { duration: 420, easing: 'ease' });
      [bar, close].forEach((el) => el.animate([{ opacity: 0, transform: 'translateY(8px)' }, { opacity: 1, transform: 'none' }], { duration: 480, delay: 200, easing: ease, fill: 'backwards' }));
    };

    const shut = () => {
      if (closing || !viewer.open) return;
      closing = true;
      const trigger = triggers[index];
      const done = () => {
        trigger.classList.remove('is-away');
        image?.remove();
        image = null;
        viewer.close();
        settle();
      };
      if (reduceMotion) return done();
      const box = image.getBoundingClientRect();
      const rect = trigger.querySelector('img').getBoundingClientRect();
      const seen = rect.bottom > 0 && rect.top < innerHeight;
      // Back to its place if that place is on screen; otherwise it simply fades
      image.animate(seen
        ? [{ transform: getComputedStyle(image).transform === 'none' ? 'none' : getComputedStyle(image).transform }, { transform: from(box, rect), borderRadius: '12px' }]
        : [{ opacity: 1 }, { opacity: 0, transform: 'scale(0.96)' }], { duration: 520, easing: ease, fill: 'forwards' }).onfinish = done;
      shade.animate([{ opacity: 1 }, { opacity: 0 }], { duration: 420, easing: 'ease', fill: 'forwards' });
      [bar, close].forEach((el) => el.animate([{ opacity: 1 }, { opacity: 0 }], { duration: 200, fill: 'forwards' }));
    };

    const go = (step) => {
      if (closing || triggers.length < 2) return;
      const old = image;
      triggers[index].classList.remove('is-away');
      index = (index + step + triggers.length) % triggers.length;
      triggers[index].classList.add('is-away');
      image = make(index);
      place(image, fit(image));
      old.after(image);
      label(step);
      if (reduceMotion) return old.remove();
      // A push: both move together by one screen, so they never cross
      const push = { duration: 680, easing: 'cubic-bezier(0.76, 0, 0.24, 1)' };
      old.getAnimations().forEach((animation) => animation.cancel());
      old.animate([{ transform: 'none' }, { transform: `translateX(${-step * innerWidth}px)` }], { ...push, fill: 'forwards' }).onfinish = () => old.remove();
      image.animate([{ transform: `translateX(${step * innerWidth}px)` }, { transform: 'none' }], push);
    };

    triggers.forEach((trigger, i) => trigger.addEventListener('click', () => open(i), { signal }));
    viewer.querySelectorAll('[data-step]').forEach((button) => button.addEventListener('click', () => go(Number(button.dataset.step)), { signal }));
    close.addEventListener('click', shut, { signal });
    shade.addEventListener('click', shut, { signal });
    viewer.addEventListener('cancel', (event) => {
      event.preventDefault();
      shut();
    }, { signal });
    viewer.addEventListener('keydown', (event) => {
      if (event.key === 'ArrowRight') go(1);
      if (event.key === 'ArrowLeft') go(-1);
    }, { signal });
    // A scroll closes it, but the page does not move underneath, and the end of the scroll that
    // brought the reader here (trackpad inertia) does not close it again at once
    viewer.addEventListener('wheel', (event) => {
      event.preventDefault();
      if (Date.now() - opened < 600) return;
      wheeled += Math.abs(event.deltaY) + Math.abs(event.deltaX);
      if (wheeled > 40) {
        wheeled = 0;
        shut();
      }
    }, { passive: false, signal });
    viewer.addEventListener('touchmove', (event) => event.preventDefault(), { passive: false, signal });

    // A swipe: sideways for the next one, down to close; a tap closes
    let start = null;
    viewer.addEventListener('pointerdown', (event) => {
      if (event.target === image) start = { x: event.clientX, y: event.clientY };
    }, { signal });
    viewer.addEventListener('pointerup', (event) => {
      if (!start) return;
      const dx = event.clientX - start.x;
      const dy = event.clientY - start.y;
      start = null;
      if (Math.abs(dx) > 60 && Math.abs(dx) > Math.abs(dy)) go(dx < 0 ? 1 : -1);
      else if (dy > 80 || (Math.abs(dx) < 6 && Math.abs(dy) < 6)) shut();
    }, { signal });
    addEventListener('resize', () => image && !closing && place(image, fit(image)), { signal });

    // Stopped while open (or closing): the viewer closes at once
    signal.addEventListener('abort', () => viewer.open && viewer.close());
  }

  // Kodza lifecycle, the same in every component: `kodza:init` starts the instances inside
  // event.detail.root (the whole page by default), `kodza:destroy` stops them and puts their
  // markup back. For themes and apps that swap content without a page load.
  const instances = new WeakMap();
  const find = (scope = document) => [scope, ...scope.querySelectorAll(SELECTOR)].filter((el) => el.matches?.(SELECTOR));
  const init = (scope) => find(scope).forEach((root) => {
    if (root.classList.contains('is-ready')) return; // already running, maybe from another copy of this script
    const controller = new AbortController();
    instances.set(root, { controller, html: root.innerHTML, attrs: [...root.attributes].map((a) => [a.name, a.value]) });
    mount(root, controller.signal);
    root.classList.add('is-ready');
  });
  const destroy = (scope) => find(scope).forEach((root) => {
    const instance = instances.get(root);
    if (!instance) return;
    instances.delete(root);
    instance.controller.abort();
    [...root.attributes].forEach((a) => root.removeAttribute(a.name));
    instance.attrs.forEach(([name, value]) => root.setAttribute(name, value));
    root.innerHTML = instance.html;
  });
  document.addEventListener('kodza:init', (event) => init(event.detail?.root));
  document.addEventListener('kodza:destroy', (event) => destroy(event.detail?.root));
  init();
  // Loaded in <head>, the script runs before the markup exists: once more when it is parsed
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', () => init(), { once: true });
})();
```

Free to use, from Kodza (https://kodza.dev).