# Ken Burns Slider

> A background slideshow behind fixed words: each photo drifts slowly toward its point of interest, and the next is uncovered by a slow curtain in the same direction. A thin line counts the time, with a pause button.

Image effects · image, slideshow, hero, ken-burns, background · HTML, CSS, vanilla JS · no dependencies · updated 2026-11-05
Demo: https://kodza.dev/components/ken-burns-slider/
Source on GitHub: https://github.com/kodza-dev/kodza/tree/main/components/ken-burns-slider

## Files

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

- [`kodza-ken-burns-slider.css`](https://kodza.dev/registry/ken-burns-slider/kodza-ken-burns-slider.css) · 20.8 KB
- [`kodza-ken-burns-slider.js`](https://kodza.dev/registry/ken-burns-slider/kodza-ken-burns-slider.js) · 14.8 KB
- [`kodza-ken-burns-slider.html`](https://kodza.dev/registry/ken-burns-slider/kodza-ken-burns-slider.html) · 3.3 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-ken-burns-slider.css https://kodza.dev/registry/ken-burns-slider/kodza-ken-burns-slider.css
curl -fsSL --create-dirs -o kodza/kodza-ken-burns-slider.js https://kodza.dev/registry/ken-burns-slider/kodza-ken-burns-slider.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`.)

**Its images are free to use in what you ship** (Kodza house images, Kodza License). The HTML loads them from kodza.dev, whose addresses can change: copy them into the project and point each `src` to the copy (a Claude artifact embeds them instead, as Use it says).

```bash
curl -fsSL --create-dirs -o kodza/media/kz-table-1400.webp https://kodza.dev/media/kz-table-1400.webp
curl -fsSL --create-dirs -o kodza/media/kz-table-2400.webp https://kodza.dev/media/kz-table-2400.webp
curl -fsSL --create-dirs -o kodza/media/kz-arch-1400.webp https://kodza.dev/media/kz-arch-1400.webp
curl -fsSL --create-dirs -o kodza/media/kz-arch-2400.webp https://kodza.dev/media/kz-arch-2400.webp
curl -fsSL --create-dirs -o kodza/media/kz-columns-1400.webp https://kodza.dev/media/kz-columns-1400.webp
curl -fsSL --create-dirs -o kodza/media/kz-columns-2400.webp https://kodza.dev/media/kz-columns-2400.webp
curl -fsSL --create-dirs -o kodza/media/kz-overflow-1400.webp https://kodza.dev/media/kz-overflow-1400.webp
curl -fsSL --create-dirs -o kodza/media/kz-overflow-2400.webp https://kodza.dev/media/kz-overflow-2400.webp
```

## API

- Root: `.kodza-ken-burns-slider`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-ken-burns-slider-height: 640px` — 100svh for a full-screen hero
  - `--kz-ken-burns-slider-ink: #0a0a0a`
  - `--kz-ken-burns-slider-paper: #ffffff`
  - `--kz-ken-burns-slider-text: rgba(255, 255, 255, 0.9)`
  - `--kz-ken-burns-slider-faint: rgba(255, 255, 255, 0.9)`
  - `--kz-ken-burns-slider-track: rgba(255, 255, 255, 0.3)`
  - `--kz-ken-burns-slider-backdrop: #1c1c1c` — under the photos while they load
  - `--kz-ken-burns-slider-shade: linear-gradient(to top, rgba(10, 10, 10, 0.82), rgba(10, 10, 10, 0.66) 300px, rgba(10, 10, 10, 0.54) 460px, rgba(10, 10, 10, 0.16)), linear-gradient(to right, rgba(10, 10, 10, 0.3), rgba(10, 10, 10, 0) 60%)`
  - `--kz-ken-burns-slider-pad: clamp(22px, 4.4vw, 56px)`
  - `--kz-ken-burns-slider-radius: 0px`
  - `--kz-ken-burns-slider-mono: var(--kz-font-mono, "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace)`
  - `--kz-ken-burns-slider-ease: cubic-bezier(0.22, 1, 0.36, 1)`
- Attributes:
  - `data-focus` (e.g. `60% 62%`, `42% 56%`, `64% 50%`, `50% 58%`)
  - `data-interval` (e.g. `6000`)
- 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.

- On the pause button (focus in `.kodza-ken-burns-slider__pause`):
  - `Enter` / `Space`: Pauses the slideshow, or starts it again

## Images

The shape of each image slot, measured in the demo at 1440 × 900 (desktop) and 390 × 844 (mobile). Where the shape is fixed, the frame crops the image to it: export in that shape, keep the subject near the centre, at twice the widest size shown (sharp on retina screens).

| Slot | Desktop | Mobile | Widest shown |
| --- | --- | --- | --- |
| `.kodza-ken-burns-slider__image` | 2.21:1 | 1:1.64 | 1240 px |

## Dark mode

The values Kodza uses on a dark background (`#0a0a0a`). For a page that follows the system theme, add them after the component's CSS:

```css
@media (prefers-color-scheme: dark) {
  .kodza-ken-burns-slider {
    --kz-ken-burns-slider-backdrop: #161616;
  }
}
```

A site with its own theme switch puts the same rules under its dark selector instead (`[data-theme="dark"] .kodza-ken-burns-slider { … }`); a single dark section, under that section's class.

Its images have dark versions next to them (`kz-table-1400.webp` → `kz-table-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-ken-burns-slider.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-ken-burns-slider.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-ken-burns-slider.js`, loaded with `<script src="kodza/kodza-ken-burns-slider.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. A site with its own type sets it once for every Kodza component, on `:root`, never by editing the CSS (unset, nothing changes): `--kz-font-display`, the display face (headings, big numbers, wordmarks); `--kz-font-display-weight`, its weight; `--kz-font-display-scale`, a multiplier on its sizes (1 by default); `--kz-font-display-tracking`, its letter-spacing; `--kz-font-display-case`, its case (`uppercase`…); `--kz-font-label`, the face of the small labels (meta, captions, counters, hints, footer links, button labels); `--kz-font-label-size`, their size, one for all of them (`11px`…); `--kz-font-label-weight`, their weight; `--kz-font-label-tracking`, their letter-spacing; `--kz-font-label-case`, their case (`uppercase`…; code and units keep theirs); `--kz-font-label-leading`, their line-height (`1.45`…; buttons, pills and keys keep their box); `--kz-font-mono`, the monospace face (code, labels, counters). 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">`.
- Corners: a site with its own shapes sets them once for every Kodza component, on `:root`, never by editing the CSS (unset, nothing changes): `--kz-radius-pill` sets the pills (`0` squares them).
- Motion: a site sets its pace once for every Kodza component, on `:root`, never by editing the CSS or the JS: `--kz-motion-scale` multiplies every duration (`0.5` twice as fast, `2` twice as slow, `0` no motion at all, loops stopped, like reduced motion). Unset, nothing changes.
- 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$/{r kodza/kodza-ken-burns-slider.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-ken-burns-slider.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">`. A site with its own type sets it once for every Kodza component, on `:root`, never by editing the CSS (unset, nothing changes): `--kz-font-display`, the display face (headings, big numbers, wordmarks); `--kz-font-display-weight`, its weight; `--kz-font-display-scale`, a multiplier on its sizes (1 by default); `--kz-font-display-tracking`, its letter-spacing; `--kz-font-display-case`, its case (`uppercase`…); `--kz-font-label`, the face of the small labels (meta, captions, counters, hints, footer links, button labels); `--kz-font-label-size`, their size, one for all of them (`11px`…); `--kz-font-label-weight`, their weight; `--kz-font-label-tracking`, their letter-spacing; `--kz-font-label-case`, their case (`uppercase`…; code and units keep theirs); `--kz-font-label-leading`, their line-height (`1.45`…; buttons, pills and keys keep their box); `--kz-font-mono`, the monospace face (code, labels, counters).
- Corners: a site with its own shapes sets them once for every Kodza component, on `:root`, never by editing the CSS (unset, nothing changes): `--kz-radius-pill` sets the pills (`0` squares them).
- Motion: a site sets its pace once for every Kodza component, on `:root`, never by editing the CSS or the JS: `--kz-motion-scale` multiplies every duration (`0.5` twice as fast, `2` twice as slow, `0` no motion at all, loops stopped, like reduced motion). Unset, nothing changes.
- 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.
- This one spans the page: a block theme keeps a Custom HTML block to the width of the text column, so put it inside a **Group** block set to **Full width**, with **Inner blocks use content width** turned off.
- 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-ken-burns-slider', $uri . 'kodza-ken-burns-slider.css', [], filemtime($dir . 'kodza-ken-burns-slider.css'));
    wp_enqueue_script('kodza-ken-burns-slider', $uri . 'kodza-ken-burns-slider.js', [], filemtime($dir . 'kodza-ken-burns-slider.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.
- This one spans the page: give the widget its own container, **Content Width: Full Width**, padding 0.
- 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-ken-burns-slider.css` and `assets/kodza-ken-burns-slider.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-ken-burns-slider.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-ken-burns-slider.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/`): `KenBurnsSlider.tsx` (below), the CSS block under Code saved as `ken-burns-slider.css` and the JS block as `ken-burns-slider.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { KenBurnsSlider } from '@/components/kodza/KenBurnsSlider';` then `<KenBurnsSlider />`. Props: `interval` (`data-interval`: "6000"), `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-ken-burns-slider-height': … }}`), `className`, `style` and the other props of its `<section>` (`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 './ken-burns-slider.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.
- Built from your data (tabs, rows, options)? Add what the markup is made of to the `key`, as plain values (ids, text, numbers). What the visitor changes (the open tab, the sort, what they type) is the script's: follow it with `onClick` or `onInput` on the root, and change it from your code as a visitor would (click the tab; set the field's value, then dispatch a bubbling `input` event). Fields stay uncontrolled (`defaultValue`, `name`).

```tsx
'use client';
// Kodza — Ken Burns Slider, for React. From https://kodza.dev/components/ken-burns-slider/
// 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: ken-burns-slider.css and ken-burns-slider.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.
// data-kodza-manual keeps the script from starting it on its own: the effect below does, once
// React has hydrated the markup (on a page that streams in, the script can load first).
// Built from your data (tabs, rows, options)? Put what the markup is made of in the key, as plain
// values (ids, text, numbers): a change starts the script again on fresh markup. What the visitor
// changes (the open tab, the sort, what they type) is the script's: keep it out of the key, follow
// it with onClick or onInput on the root, and change it from your code as a visitor would (click
// the tab; set the field's value, then dispatch a bubbling input event).
import { useRef, useEffect, type ComponentPropsWithoutRef, type ComponentRef, type CSSProperties } from 'react';
import './ken-burns-slider.css';

export type KenBurnsSliderProps = Omit<ComponentPropsWithoutRef<'section'>, "children" | "vars" | "interval"> & {
  /** data-interval on the root (default: 6000) */
  interval?: "6000";
  /** Settings, as CSS variables on the root */
  vars?: {
    /** 100svh for a full-screen hero — default: 640px */
    "--kz-ken-burns-slider-height"?: string | number;
    /** default: #0a0a0a */
    "--kz-ken-burns-slider-ink"?: string | number;
    /** default: #ffffff */
    "--kz-ken-burns-slider-paper"?: string | number;
    /** default: rgba(255, 255, 255, 0.9) */
    "--kz-ken-burns-slider-text"?: string | number;
    /** default: rgba(255, 255, 255, 0.9) */
    "--kz-ken-burns-slider-faint"?: string | number;
    /** default: rgba(255, 255, 255, 0.3) */
    "--kz-ken-burns-slider-track"?: string | number;
    /** under the photos while they load — default: #1c1c1c */
    "--kz-ken-burns-slider-backdrop"?: string | number;
    /** default: linear-gradient(to top, rgba(10, 10, 10, 0.82), rgba(10, 10, 10, 0.66) 300px, rgba(10, 10, 10, 0.54) 460px, rgba(10, 10, 10, 0.16)), linear-gradient(to right, rgba(10, 10, 10, 0.3), rgba(10, 10, 10, 0) 60%) */
    "--kz-ken-burns-slider-shade"?: string | number;
    /** default: clamp(22px, 4.4vw, 56px) */
    "--kz-ken-burns-slider-pad"?: string | number;
    /** default: 0px */
    "--kz-ken-burns-slider-radius"?: string | number;
    /** default: var(--kz-font-mono, "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace) */
    "--kz-ken-burns-slider-mono"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-ken-burns-slider-ease"?: string | number;
  };
  className?: string;
};

export function KenBurnsSlider({ interval = "6000", vars, className, style, ...rest }: KenBurnsSliderProps) {
  const ref = useRef<ComponentRef<'section'>>(null);
  const classes = ["kodza-ken-burns-slider", 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, interval, 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('./ken-burns-slider.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 (
    <section aria-label="Maison Rempart" key={key} {...rest} className={classes} data-kodza-manual data-interval={interval} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <ul className="kodza-ken-burns-slider__slides">
        <li className="kodza-ken-burns-slider__slide is-current" data-focus="60% 62%">
          <img className="kodza-ken-burns-slider__image" src="https://kodza.dev/media/kz-table-1400.webp" srcSet="https://kodza.dev/media/kz-table-1400.webp 1400w, https://kodza.dev/media/kz-table-2400.webp 2400w" sizes="(max-width: 760px) 200vw, 100vw" width="1400" height="1050" alt="A white table set with two glasses and a bottle, facing a misty sea with a sailboat" fetchPriority="high" />
        </li>
        <li className="kodza-ken-burns-slider__slide" data-focus="42% 56%">
          <img className="kodza-ken-burns-slider__image" src="https://kodza.dev/media/kz-arch-1400.webp" srcSet="https://kodza.dev/media/kz-arch-1400.webp 1400w, https://kodza.dev/media/kz-arch-2400.webp 2400w" sizes="(max-width: 760px) 200vw, 100vw" width="1400" height="1400" alt="A concrete wall with a round-topped opening, sunlight pouring through it" loading="lazy" />
        </li>
        <li className="kodza-ken-burns-slider__slide" data-focus="64% 50%">
          <img className="kodza-ken-burns-slider__image" src="https://kodza.dev/media/kz-columns-1400.webp" srcSet="https://kodza.dev/media/kz-columns-1400.webp 1400w, https://kodza.dev/media/kz-columns-2400.webp 2400w" sizes="(max-width: 760px) 200vw, 100vw" width="1120" height="1400" alt="A row of square concrete pillars under a flat roof, casting striped shadows" loading="lazy" />
        </li>
        <li className="kodza-ken-burns-slider__slide" data-focus="50% 58%">
          <img className="kodza-ken-burns-slider__image" src="https://kodza.dev/media/kz-overflow-1400.webp" srcSet="https://kodza.dev/media/kz-overflow-1400.webp 1400w, https://kodza.dev/media/kz-overflow-2400.webp 2400w" sizes="(max-width: 760px) 200vw, 100vw" width="1400" height="1400" alt="A two-storey concrete house, its upper floor cantilevered over the ground" loading="lazy" />
        </li>
      </ul>
      <div className="kodza-ken-burns-slider__content">
        <p className="kodza-ken-burns-slider__label">Maison Rempart · Saint-Malo</p>
        <h2 className="kodza-ken-burns-slider__title">
          <span className="kodza-ken-burns-slider__phrase">Nine rooms.</span>
          {' '}
          <span className="kodza-ken-burns-slider__phrase">The sea does the rest.</span>
        </h2>
        <p className="kodza-ken-burns-slider__text">No spa, no welcome drink, no app to open the door. Thick walls, a good bed and the tide twice a day.</p>
        <a className="kodza-ken-burns-slider__button" href="#">Check availability<svg className="kodza-ken-burns-slider__arrow" viewBox="0 0 16 16" aria-hidden="true"> <path d="M3 8h10M9 4l4 4-4 4" /> </svg></a>
      </div>
      <div className="kodza-ken-burns-slider__controls">
        <span className="kodza-ken-burns-slider__count"><span className="kodza-ken-burns-slider__index"> <span>01</span> </span> / <span className="kodza-ken-burns-slider__total">04</span></span>
        {' '}
        <span className="kodza-ken-burns-slider__line" aria-hidden="true">
          <span className="kodza-ken-burns-slider__fill" />
        </span>
        {' '}
        <button className="kodza-ken-burns-slider__pause" type="button" aria-pressed="false" aria-label="Pause the slideshow">
          <svg className="kodza-ken-burns-slider__icon" viewBox="0 0 16 16" aria-hidden="true">
            <path className="kodza-ken-burns-slider__bars" d="M5.5 4v8M10.5 4v8" />
            <path className="kodza-ken-burns-slider__play" d="M5.5 3.8v8.4L12 8z" />
          </svg>
        </button>
      </div>
    </section>
  );
}
```

## Code

```html
<section class="kodza-ken-burns-slider" data-interval="6000" aria-label="Maison Rempart">
  <ul class="kodza-ken-burns-slider__slides">
    <li class="kodza-ken-burns-slider__slide is-current" data-focus="60% 62%">
      <img class="kodza-ken-burns-slider__image" src="https://kodza.dev/media/kz-table-1400.webp" srcset="https://kodza.dev/media/kz-table-1400.webp 1400w, https://kodza.dev/media/kz-table-2400.webp 2400w" sizes="(max-width: 760px) 200vw, 100vw" width="1400" height="1050" alt="A white table set with two glasses and a bottle, facing a misty sea with a sailboat" fetchpriority="high">
    </li>
    <li class="kodza-ken-burns-slider__slide" data-focus="42% 56%">
      <img class="kodza-ken-burns-slider__image" src="https://kodza.dev/media/kz-arch-1400.webp" srcset="https://kodza.dev/media/kz-arch-1400.webp 1400w, https://kodza.dev/media/kz-arch-2400.webp 2400w" sizes="(max-width: 760px) 200vw, 100vw" width="1400" height="1400" alt="A concrete wall with a round-topped opening, sunlight pouring through it" loading="lazy">
    </li>
    <li class="kodza-ken-burns-slider__slide" data-focus="64% 50%">
      <img class="kodza-ken-burns-slider__image" src="https://kodza.dev/media/kz-columns-1400.webp" srcset="https://kodza.dev/media/kz-columns-1400.webp 1400w, https://kodza.dev/media/kz-columns-2400.webp 2400w" sizes="(max-width: 760px) 200vw, 100vw" width="1120" height="1400" alt="A row of square concrete pillars under a flat roof, casting striped shadows" loading="lazy">
    </li>
    <li class="kodza-ken-burns-slider__slide" data-focus="50% 58%">
      <img class="kodza-ken-burns-slider__image" src="https://kodza.dev/media/kz-overflow-1400.webp" srcset="https://kodza.dev/media/kz-overflow-1400.webp 1400w, https://kodza.dev/media/kz-overflow-2400.webp 2400w" sizes="(max-width: 760px) 200vw, 100vw" width="1400" height="1400" alt="A two-storey concrete house, its upper floor cantilevered over the ground" loading="lazy">
    </li>
  </ul>
  <div class="kodza-ken-burns-slider__content">
    <p class="kodza-ken-burns-slider__label">Maison Rempart · Saint-Malo</p>
    <h2 class="kodza-ken-burns-slider__title"><span class="kodza-ken-burns-slider__phrase">Nine rooms.</span> <span class="kodza-ken-burns-slider__phrase">The sea does the rest.</span></h2>
    <p class="kodza-ken-burns-slider__text">No spa, no welcome drink, no app to open the door. Thick walls, a good bed and the tide twice a day.</p>
    <a class="kodza-ken-burns-slider__button" href="#">Check availability<svg class="kodza-ken-burns-slider__arrow" viewBox="0 0 16 16" aria-hidden="true"><path d="M3 8h10M9 4l4 4-4 4" /></svg></a>
  </div>
  <div class="kodza-ken-burns-slider__controls">
    <span class="kodza-ken-burns-slider__count"><span class="kodza-ken-burns-slider__index"><span>01</span></span> / <span class="kodza-ken-burns-slider__total">04</span></span>
    <span class="kodza-ken-burns-slider__line" aria-hidden="true"><span class="kodza-ken-burns-slider__fill"></span></span>
    <button class="kodza-ken-burns-slider__pause" type="button" aria-pressed="false" aria-label="Pause the slideshow"><svg class="kodza-ken-burns-slider__icon" viewBox="0 0 16 16" aria-hidden="true"><path class="kodza-ken-burns-slider__bars" d="M5.5 4v8M10.5 4v8" /><path class="kodza-ken-burns-slider__play" d="M5.5 3.8v8.4L12 8z" /></svg></button>
  </div>
</section>
```

```css
/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — Ken Burns Slider
   A slideshow behind words that stay put, like a hotel's hero: each photo drifts slowly toward its
   point of interest (data-focus on the slide), and the next one is uncovered by a slow curtain in
   the direction of that drift while the last one is still moving. A thin line counts each photo's
   time; the slideshow waits while it is paused, out of view, in a hidden tab or holds the focus.
   Everything is tuned with the --kz-ken-burns-slider-* variables (and data-interval, in ms). */
.kodza-ken-burns-slider {
  --kz-ken-burns-slider-height: 640px; /* 100svh for a full-screen hero */
  --kz-ken-burns-slider-ink: #0a0a0a;
  --kz-ken-burns-slider-paper: #ffffff;
  --kz-ken-burns-slider-text: rgba(255, 255, 255, 0.9);
  --kz-ken-burns-slider-faint: rgba(255, 255, 255, 0.9);
  --kz-ken-burns-slider-track: rgba(255, 255, 255, 0.3);
  --kz-ken-burns-slider-backdrop: #1c1c1c; /* under the photos while they load */
  /* The shade under the words: measured in px from the bottom edge, where the words stand
     whatever the height, and a little from the left where they sit */
  --kz-ken-burns-slider-shade: linear-gradient(to top, rgba(10, 10, 10, 0.82), rgba(10, 10, 10, 0.66) 300px, rgba(10, 10, 10, 0.54) 460px, rgba(10, 10, 10, 0.16)), linear-gradient(to right, rgba(10, 10, 10, 0.3), rgba(10, 10, 10, 0) 60%);
  --kz-ken-burns-slider-pad: clamp(22px, 4.4vw, 56px);
  --kz-ken-burns-slider-radius: 0px;
  --kz-ken-burns-slider-mono: var(--kz-font-mono, "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace);
  --kz-ken-burns-slider-ease: cubic-bezier(0.22, 1, 0.36, 1);

  container: kodza-ken-burns-slider / inline-size;
  position: relative;
  isolation: isolate;
  box-sizing: border-box;
  /* The words at the bottom left, the controls at the bottom right, under the words when narrow */
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  align-content: flex-end;
  justify-content: space-between;
  gap: 24px 40px;
  width: 100%;
  min-height: var(--kz-ken-burns-slider-height);
  margin: 0;
  padding: var(--kz-ken-burns-slider-pad);
  overflow: clip;
  border-radius: var(--kz-ken-burns-slider-radius);
  background: var(--kz-ken-burns-slider-backdrop);
  color: var(--kz-ken-burns-slider-paper);
}

/* The photos: stacked in the same box, behind the words */
.kodza-ken-burns-slider__slides {
  position: absolute;
  z-index: -1;
  inset: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.kodza-ken-burns-slider__slides::after {
  content: "";
  position: absolute;
  z-index: 3;
  inset: 0;
  background: var(--kz-ken-burns-slider-shade);
  pointer-events: none;
}

.kodza-ken-burns-slider__slide {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  overflow: clip;
  visibility: hidden;
}

/* The one on show above the one leaving; the others wait, hidden */
.kodza-ken-burns-slider__slide.is-current {
  z-index: 2;
  visibility: visible;
}

.kodza-ken-burns-slider__slide.is-leaving {
  z-index: 1;
  visibility: visible;
}

.kodza-ken-burns-slider__image {
  display: block;
  width: 100%;
  max-width: none;
  height: 100%;
  margin: 0;
  object-fit: cover;
}

/* The words */
.kodza-ken-burns-slider__content {
  flex: 0 1 680px;
  min-width: 0;
}

.kodza-ken-burns-slider__label {
  margin: 0 0 18px;
  font-family: var(--kz-font-label, var(--kz-ken-burns-slider-mono));
  font-size: var(--kz-font-label-size, 12.5px);
  font-weight: var(--kz-font-label-weight, 500);
  letter-spacing: var(--kz-font-label-tracking, 0.02em);
  text-transform: var(--kz-font-label-case, uppercase);
  line-height: var(--kz-font-label-leading, 16px);
  color: var(--kz-ken-burns-slider-faint);
}

.kodza-ken-burns-slider__title {
  margin: 0;
  font-family: var(--kz-font-display, inherit);
  font-size: calc(clamp(36px, 5.2vw, 72px) * var(--kz-font-display-scale, 1));
  font-weight: var(--kz-font-display-weight, 500);
  letter-spacing: var(--kz-font-display-tracking, -0.045em);
  text-transform: var(--kz-font-display-case, none);
  line-height: 1.02;
  color: inherit;
  text-wrap: balance;
}

/* One sentence per line, each balanced on its own when it has to wrap */
.kodza-ken-burns-slider__phrase {
  display: block;
}

.kodza-ken-burns-slider__text {
  max-width: 44ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.55;
  color: var(--kz-ken-burns-slider-text);
  text-wrap: pretty;
}

.kodza-ken-burns-slider__button {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 52px;
  margin-top: 28px;
  padding: 0 24px 0 26px;
  border-radius: var(--kz-radius-pill, 999px);
  background: var(--kz-ken-burns-slider-paper);
  color: var(--kz-ken-burns-slider-ink);
  font-family: var(--kz-font-label, inherit);
  font-size: var(--kz-font-label-size, 15px);
  font-weight: var(--kz-font-label-weight, 500);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  text-transform: var(--kz-font-label-case, inherit);
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
}

.kodza-ken-burns-slider__arrow {
  flex: none;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform calc(0.25s * var(--kz-motion-scale, 1)) var(--kz-ken-burns-slider-ease);
}

@media (hover: hover) {
  .kodza-ken-burns-slider__button:hover .kodza-ken-burns-slider__arrow {
    transform: translateX(3px);
  }
}

.kodza-ken-burns-slider__button:focus-visible,
.kodza-ken-burns-slider__pause:focus-visible {
  outline: 2px solid var(--kz-ken-burns-slider-paper);
  outline-offset: 3px;
}

/* Which photo, the time it has left, and the pause button */
.kodza-ken-burns-slider__controls {
  flex: none;
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--kz-font-label, var(--kz-ken-burns-slider-mono));
  font-size: var(--kz-font-label-size, 12.5px);
  font-weight: var(--kz-font-label-weight, 500);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  line-height: 16px;
  color: var(--kz-ken-burns-slider-faint);
}

/* Nothing to count or pause without the script, or with a single still photo */
.kodza-ken-burns-slider:not(.is-ready) .kodza-ken-burns-slider__controls,
.kodza-ken-burns-slider.is-still .kodza-ken-burns-slider__controls {
  display: none;
}

.kodza-ken-burns-slider__count {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.kodza-ken-burns-slider__index {
  display: inline-grid;
  overflow: clip;
  vertical-align: top;
}

.kodza-ken-burns-slider__index > span {
  grid-area: 1 / 1;
}

.kodza-ken-burns-slider__line {
  position: relative;
  display: block;
  width: 88px;
  height: 2px;
  overflow: clip;
  border-radius: var(--kz-radius-pill, 999px);
  background: var(--kz-ken-burns-slider-track);
}

.kodza-ken-burns-slider__fill {
  position: absolute;
  inset: 0;
  background: var(--kz-ken-burns-slider-paper);
  transform: translateX(-100%);
}

.kodza-ken-burns-slider__pause {
  box-sizing: border-box;
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--kz-ken-burns-slider-track);
  border-radius: 50%;
  background: rgba(10, 10, 10, 0.2);
  color: var(--kz-ken-burns-slider-paper);
  cursor: pointer;
  transition: border-color calc(0.2s * var(--kz-motion-scale, 1));
}

@media (hover: hover) {
  .kodza-ken-burns-slider__pause:hover {
    border-color: var(--kz-ken-burns-slider-paper);
  }
}

.kodza-ken-burns-slider__icon {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.kodza-ken-burns-slider__play {
  fill: currentColor;
  stroke-width: 1.2;
  opacity: 0;
  transform: scale(0.6);
  transform-origin: 50% 50%;
  transition:
    opacity calc(0.2s * var(--kz-motion-scale, 1)),
    transform calc(0.25s * var(--kz-motion-scale, 1)) var(--kz-ken-burns-slider-ease);
}

.kodza-ken-burns-slider__bars {
  transform-origin: 50% 50%;
  transition:
    opacity calc(0.2s * var(--kz-motion-scale, 1)),
    transform calc(0.25s * var(--kz-motion-scale, 1)) var(--kz-ken-burns-slider-ease);
}

.kodza-ken-burns-slider__pause[aria-pressed="true"] .kodza-ken-burns-slider__bars {
  opacity: 0;
  transform: scale(0.6);
}

.kodza-ken-burns-slider__pause[aria-pressed="true"] .kodza-ken-burns-slider__play {
  opacity: 1;
  transform: none;
}

/* Narrow: a slightly smaller text */
@container kodza-ken-burns-slider (max-width: 640px) {
  .kodza-ken-burns-slider__text {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kodza-ken-burns-slider *,
  .kodza-ken-burns-slider *::before,
  .kodza-ken-burns-slider *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* kodza-guard d2a496d7d49b — 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-ken-burns-slider__slides):not(#_),
:where(.kodza-ken-burns-slider__slide):not(#_),
:where(.kodza-ken-burns-slider__image):not(#_),
:where(.kodza-ken-burns-slider__label):not(#_),
:where(.kodza-ken-burns-slider__title):not(#_),
:where(.kodza-ken-burns-slider__text):not(#_),
:where(.kodza-ken-burns-slider__icon):not(#_) {
  transition-duration: revert;
}

:where(.kodza-ken-burns-slider__button):not(#_) {
  outline: revert;
  outline-offset: revert;
  transition-duration: revert;
}

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

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

.kodza-ken-burns-slider__slides:not(#_) {
  border: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  box-sizing: revert;
  float: 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;
  transition-property: revert;
  transition-timing-function: revert;
  transition-delay: revert;
}

.kodza-ken-burns-slider__slide:not(#_) {
  border: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: 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;
  transition-property: revert;
  transition-timing-function: revert;
  transition-delay: revert;
}

.kodza-ken-burns-slider__image:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: 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-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;
  transition-property: revert;
  transition-timing-function: revert;
  transition-delay: revert;
}

.kodza-ken-burns-slider__content:not(#_),
.kodza-ken-burns-slider__phrase:not(#_),
.kodza-ken-burns-slider__controls:not(#_),
.kodza-ken-burns-slider__count:not(#_),
.kodza-ken-burns-slider__index:not(#_),
.kodza-ken-burns-slider__total:not(#_),
.kodza-ken-burns-slider__line:not(#_),
.kodza-ken-burns-slider__fill:not(#_),
.kodza-ken-burns-slider__bars:not(#_),
.kodza-ken-burns-slider__play:not(#_),
.kodza-ken-burns-slider__index span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-ken-burns-slider__label:not(#_),
.kodza-ken-burns-slider__title:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: 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;
  font-style: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  transition-property: revert;
  transition-timing-function: revert;
  transition-delay: revert;
}

.kodza-ken-burns-slider__text:not(#_) {
  border: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: 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-height: revert;
  font-family: revert;
  font-weight: revert;
  font-style: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  transition-property: revert;
  transition-timing-function: revert;
  transition-delay: revert;
}

.kodza-ken-burns-slider__button:not(#_) {
  border: revert;
  list-style: revert;
  float: revert;
  position: revert;
  margin-right: revert;
  margin-bottom: revert;
  margin-left: revert;
  box-shadow: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  font-style: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  transition-property: revert;
  transition-timing-function: revert;
  transition-delay: revert;
}

.kodza-ken-burns-slider__arrow:not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: 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-ken-burns-slider__pause:not(#_) {
  text-decoration: revert;
  list-style: revert;
  float: revert;
  position: 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-ken-burns-slider__icon:not(#_) {
  border: revert;
  margin: revert;
  padding: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: 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;
  transition-property: revert;
  transition-timing-function: revert;
  transition-delay: revert;
}

.kodza-ken-burns-slider__slides:not(#_):where(:not([hidden])),
.kodza-ken-burns-slider__slide:not(#_):where(:not([hidden])),
.kodza-ken-burns-slider__label:not(#_):where(:not([hidden])),
.kodza-ken-burns-slider__title:not(#_):where(:not([hidden])),
.kodza-ken-burns-slider__text:not(#_):where(:not([hidden])),
.kodza-ken-burns-slider__arrow:not(#_):where(:not([hidden])),
.kodza-ken-burns-slider__icon:not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-ken-burns-slider__slides:not(#_):where([hidden]),
.kodza-ken-burns-slider__slide:not(#_):where([hidden]),
.kodza-ken-burns-slider__label:not(#_):where([hidden]),
.kodza-ken-burns-slider__title:not(#_):where([hidden]),
.kodza-ken-burns-slider__text:not(#_):where([hidden]),
.kodza-ken-burns-slider__arrow:not(#_):where([hidden]),
.kodza-ken-burns-slider__icon:not(#_):where([hidden]) {
  display: none;
}

.kodza-ken-burns-slider__slides:not(#_)::after {
  box-sizing: revert;
}

/* 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-ken-burns-slider__slides:not(#_) {
  position: absolute;
  margin: 0;
  padding: 0;
  list-style: none;
}

.kodza-ken-burns-slider__slide:not(#_) {
  position: absolute;
  margin: 0;
  padding: 0;
}

.kodza-ken-burns-slider__image:not(#_) {
  display: block;
  max-width: none;
  margin: 0;
}

.kodza-ken-burns-slider__label:not(#_) {
  margin: 0 0 18px;
  font-family: var(--kz-font-label, var(--kz-ken-burns-slider-mono));
  font-size: var(--kz-font-label-size, 12.5px);
  font-weight: var(--kz-font-label-weight, 500);
  letter-spacing: var(--kz-font-label-tracking, 0.02em);
  text-transform: var(--kz-font-label-case, uppercase);
  line-height: var(--kz-font-label-leading, 16px);
  color: var(--kz-ken-burns-slider-faint);
}

.kodza-ken-burns-slider__title:not(#_) {
  margin: 0;
  font-family: var(--kz-font-display, inherit);
  font-size: calc(clamp(36px, 5.2vw, 72px) * var(--kz-font-display-scale, 1));
  font-weight: var(--kz-font-display-weight, 500);
  letter-spacing: var(--kz-font-display-tracking, -0.045em);
  text-transform: var(--kz-font-display-case, none);
  line-height: 1.02;
  color: inherit;
}

.kodza-ken-burns-slider__text:not(#_) {
  max-width: 44ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.55;
  color: var(--kz-ken-burns-slider-text);
}

.kodza-ken-burns-slider__button:not(#_) {
  box-sizing: border-box;
  display: inline-flex;
  margin-top: 28px;
  padding: 0 24px 0 26px;
  border-radius: var(--kz-radius-pill, 999px);
  background: var(--kz-ken-burns-slider-paper);
  color: var(--kz-ken-burns-slider-ink);
  font-family: var(--kz-font-label, inherit);
  font-size: var(--kz-font-label-size, 15px);
  font-weight: var(--kz-font-label-weight, 500);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  text-transform: var(--kz-font-label-case, inherit);
  line-height: 1;
  text-decoration: none;
}

.kodza-ken-burns-slider__arrow:not(#_) {
  transition: transform calc(0.25s * var(--kz-motion-scale, 1)) var(--kz-ken-burns-slider-ease);
}

.kodza-ken-burns-slider__button:focus-visible:not(#_) {
  outline: 2px solid var(--kz-ken-burns-slider-paper);
  outline-offset: 3px;
}

.kodza-ken-burns-slider__pause:focus-visible:not(#_) {
  outline: 2px solid var(--kz-ken-burns-slider-paper);
  outline-offset: 3px;
}

.kodza-ken-burns-slider__pause:not(#_) {
  box-sizing: border-box;
  display: grid;
  place-items: center;
  flex: none;
  width: 40px;
  height: 40px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--kz-ken-burns-slider-track);
  border-radius: 50%;
  background: rgba(10, 10, 10, 0.2);
  color: var(--kz-ken-burns-slider-paper);
  cursor: pointer;
  transition: border-color calc(0.2s * var(--kz-motion-scale, 1));
}

@media (hover: hover) {
  .kodza-ken-burns-slider__pause:hover:not(#_) {
    border-color: var(--kz-ken-burns-slider-paper);
  }
}

@container kodza-ken-burns-slider (max-width: 640px) {
  .kodza-ken-burns-slider__text:not(#_) {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kodza-ken-burns-slider *:not(#_),
  .kodza-ken-burns-slider *:not(#_)::before,
  .kodza-ken-burns-slider *:not(#_)::after {
    transition-duration: 0.01ms !important;
    animation-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 — Ken Burns Slider
// A slideshow behind words that stay put. Each photo drifts slowly toward its point of interest
// (data-focus="60% 62%" on the slide, in percent of the photo), never far enough to show an edge;
// once its time is up, the next photo is uncovered by a slow curtain travelling the way the last
// one drifts, while that one is still moving and is pushed along. The thin line fills over each
// photo's time and empties as it turns, and the count rolls with it. It all waits while paused,
// out of view, in a hidden tab, or while a link inside holds the keyboard focus. With reduced
// motion, the first photo simply stays. "kodza:replay" starts again from the first photo.
// Tune it with the --kz-ken-burns-slider-* variables in the CSS, data-interval (ms) on the root
// and the constants below.
(() => {
  const SELECTOR = '.kodza-ken-burns-slider';
  const DWELL = 6000; // ms each photo stays, unless data-interval says otherwise (a wait: the pace leaves it)
  const CURTAIN = 1600; // ms, the next photo uncovered while the last one is pushed along
  const CURTAIN_EASE = 'cubic-bezier(0.65, 0, 0.35, 1)';
  const PUSH = 8; // %, how far the curtain pushes the photo it covers
  const ZOOM_FROM = 1.04; // the drift starts at this scale...
  const ZOOM_TO = 1.16; // ...and ends at this one, its point of interest pulled toward the middle
  const ROLL = 700; // ms, the count rolling to the next number
  const ROLL_EASE = 'cubic-bezier(0.22, 1, 0.36, 1)';
  const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  // The site's pace, --kz-motion-scale (set on :root, read on the instance): every duration of the
  // script times it, and 0 moves nothing, like reduced motion
  const paceOf = (el) => {
    const pace = parseFloat(getComputedStyle(el).getPropertyValue('--kz-motion-scale'));
    return pace >= 0 ? pace : 1;
  };

  const pad = (n) => String(n).padStart(2, '0');
  // A photo ready to show: loaded and decoded (a lazy one is asked for now)
  const ready = (img) => {
    img.loading = 'eager';
    return img.decode().catch(() => {});
  };
  // The point of interest, from 0 to 1 on each axis (the middle when not given)
  const focusOf = (slide) => {
    const [x = 50, y = 50] = (slide.dataset.focus || '').split(/\s+/).map(parseFloat).filter((n) => !Number.isNaN(n));
    const unit = (n) => Math.min(100, Math.max(0, n)) / 100;
    return { x: unit(x), y: unit(y) };
  };
  // How far the drift moves the photo on one axis, in parts of its size: the point of interest
  // toward the middle, as far as the zoom covers. Both bounds hold all along the way, so no edge
  // ever shows, and the curtain travels the same way.
  const reach = (o) => {
    const room = (ZOOM_TO - 1) * 0.96; // a hair inside the edge, for rounding
    return Math.min(o * room, Math.max(-(1 - o) * room, 0.5 - o));
  };
  // The curtain for each way: where the next photo starts uncovered from, and the push of the last
  const WAYS = {
    left: { from: 'inset(0 0 0 100%)', push: `translate(-${PUSH}%, 0)` },
    right: { from: 'inset(0 100% 0 0)', push: `translate(${PUSH}%, 0)` },
    up: { from: 'inset(100% 0 0 0)', push: `translate(0, -${PUSH}%)` },
    down: { from: 'inset(0 0 100% 0)', push: `translate(0, ${PUSH}%)` },
  };

  // One instance, with its own state: two copies on a page never interfere. Everything it
  // starts is tied to `signal` (listeners get { signal }, observers and timers stop on its
  // 'abort' event), so kodza:destroy stops it all.
  function mount(root, signal) {
    const pace = paceOf(root);
    const list = root.querySelector('.kodza-ken-burns-slider__slides');
    const slides = list ? [...list.children].filter((el) => el.matches('.kodza-ken-burns-slider__slide')) : [];
    const images = slides.map((slide) => slide.querySelector('img'));
    const count = root.querySelector('.kodza-ken-burns-slider__index');
    const total = root.querySelector('.kodza-ken-burns-slider__total');
    const fill = root.querySelector('.kodza-ken-burns-slider__fill');
    const button = root.querySelector('.kodza-ken-burns-slider__pause');
    const interval = parseInt(root.dataset.interval, 10) || DWELL;
    if (!slides.length || images.some((img) => !img)) return;

    // Every photo framed on its point of interest, moving or not
    const focus = slides.map(focusOf);
    images.forEach((img, i) => {
      const at = `${focus[i].x * 100}% ${focus[i].y * 100}%`;
      img.style.objectPosition = at;
      img.style.transformOrigin = at;
    });
    const first = Math.max(0, slides.findIndex((slide) => slide.classList.contains('is-current')));
    // The still path: no motion asked, by the visitor or the site, or a single photo
    if (reduceMotion || !pace || slides.length < 2) {
      root.classList.add('is-still');
      slides.forEach((slide, i) => slide.classList.toggle('is-current', i === first));
      return;
    }
    if (total) total.textContent = pad(slides.length);

    // Every animation in play, paused and played again together
    const running = new Set();
    let visible = false;
    let focused = false;
    let held = false;
    const waiting = () => held || focused || !visible || document.hidden;
    const animate = (el, keyframes, options) => {
      const animation = el.animate(keyframes, options);
      running.add(animation);
      const drop = () => running.delete(animation);
      animation.finished.then(drop, drop);
      if (waiting()) animation.pause();
      return animation;
    };
    const sync = () => {
      const wait = waiting();
      running.forEach((animation) => {
        if (wait && animation.playState === 'running') animation.pause();
        if (!wait && animation.playState === 'paused') animation.play();
      });
    };

    // The drift: steady like a camera on rails, long enough to keep moving under the next curtain
    const drifts = new Map();
    const drift = (i) => {
      const [x, y] = [reach(focus[i].x), reach(focus[i].y)];
      drifts.set(i, animate(images[i], [
        { transform: `translate(0%, 0%) scale(${ZOOM_FROM})` },
        { transform: `translate(${x * 100}%, ${y * 100}%) scale(${ZOOM_TO})` },
      ], { duration: interval + 3 * CURTAIN * pace, easing: 'linear', fill: 'forwards' }));
    };
    // The way a photo drifts on screen: its larger move, in pixels
    const wayOf = (i) => {
      const x = reach(focus[i].x) * root.offsetWidth;
      const y = reach(focus[i].y) * root.offsetHeight;
      if (Math.max(Math.abs(x), Math.abs(y)) < 4) return 'left';
      if (Math.abs(x) >= Math.abs(y)) return x < 0 ? 'left' : 'right';
      return y < 0 ? 'up' : 'down';
    };

    const roll = (text) => {
      if (!count) return;
      const old = count.lastElementChild;
      const digits = Object.assign(document.createElement('span'), { textContent: text });
      count.append(digits);
      const timing = { duration: ROLL * pace, easing: ROLL_EASE };
      if (old) animate(old, [{ transform: 'none' }, { transform: 'translateY(-100%)' }], { ...timing, fill: 'forwards' }).finished.then(() => old.remove(), () => {});
      animate(digits, [{ transform: 'translateY(100%)' }, { transform: 'none' }], timing);
    };

    let index = first;
    let round = 0; // a replay or a destroy starts a new round: the old one's promises stop there
    const next = async (at, filled) => {
      const from = index;
      const to = (index + 1) % slides.length;
      // The photo is ready before anything moves: the curtain never uncovers an empty frame
      await ready(images[to]);
      if (at !== round) return;
      index = to;
      const [leaving, coming] = [slides[from], slides[to]];
      const way = WAYS[wayOf(from)];
      const timing = { duration: CURTAIN * pace, easing: CURTAIN_EASE };
      leaving.classList.add('is-leaving');
      leaving.classList.remove('is-current');
      coming.classList.add('is-current');
      drift(to);
      const opened = animate(coming, [{ clipPath: way.from }, { clipPath: 'inset(0)' }], timing);
      const pushed = animate(leaving, [{ transform: 'none' }, { transform: way.push }], { ...timing, fill: 'forwards' });
      // The line empties forward as the photo turns
      const emptied = fill ? animate(fill, [{ transform: 'none' }, { transform: 'translateX(100%)' }], { ...timing, fill: 'forwards' }) : null;
      filled.cancel();
      roll(pad(to + 1));
      // The photo after it starts loading now, well before its turn
      ready(images[(to + 1) % slides.length]);
      if (!(await opened.finished.then(() => true, () => false)) || at !== round) return;
      leaving.classList.remove('is-leaving');
      pushed.cancel();
      drifts.get(from)?.cancel();
      drifts.delete(from);
      emptied?.cancel();
      tick(at);
    };
    // The timer is the line itself: it fills over the photo's time, then the photo turns
    const tick = (at) => {
      // (no line in the markup: an empty animation keeps the time, and pauses like the rest)
      const filled = animate(fill || root, fill ? [{ transform: 'translateX(-100%)' }, { transform: 'none' }] : [], { duration: interval, easing: 'linear', fill: 'forwards' });
      filled.finished.then(() => at === round && next(at, filled), () => {});
    };

    const start = () => {
      round += 1;
      running.forEach((animation) => animation.cancel());
      running.clear();
      drifts.clear();
      index = first;
      slides.forEach((slide, i) => {
        slide.classList.toggle('is-current', i === first);
        slide.classList.remove('is-leaving');
      });
      count?.replaceChildren(Object.assign(document.createElement('span'), { textContent: pad(first + 1) }));
      drift(first);
      tick(round);
      ready(images[(first + 1) % slides.length]);
    };

    button?.addEventListener('click', () => {
      held = !held;
      button.setAttribute('aria-pressed', String(held));
      sync();
    }, { signal });
    // A link reached with the keyboard holds the slideshow; the pause button has its own say
    root.addEventListener('focusin', (event) => {
      focused = event.target !== button && event.target.matches(':focus-visible');
      sync();
    }, { signal });
    root.addEventListener('focusout', (event) => {
      if (!root.contains(event.relatedTarget)) focused = false;
      sync();
    }, { signal });
    document.addEventListener('visibilitychange', sync, { signal });
    const seen = new IntersectionObserver(([entry]) => {
      visible = entry.isIntersecting;
      sync();
    });
    seen.observe(root);
    root.addEventListener('kodza:replay', start, { signal });
    signal.addEventListener('abort', () => {
      round += 1;
      seen.disconnect();
      running.forEach((animation) => animation.cancel());
      running.clear();
    });

    // The first photo drifts once it is there
    ready(images[first]).then(() => signal.aborted || start());
  }

  // 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. Each running root
  // keeps its markup as written under KODZA, shared by every Kodza script on the page: a Kodza
  // component inside another one is saved as written, not half-started, and stopped with it. Two
  // components on one root (a reveal on a stat card) both start, and stop together.
  const KODZA = Symbol.for('kodza');
  const RUNNING = Symbol.for(`kodza ${SELECTOR}`); // a root this component runs on, for every copy of this script
  const instances = new WeakMap();
  const find = (scope = document) => [scope, ...scope.querySelectorAll(SELECTOR)].filter((el) => el.matches?.(SELECTOR));
  const attrsOf = (el) => [...el.attributes].map((a) => [a.name, a.value]);
  const put = (el, saved) => {
    [...el.attributes].forEach((a) => el.removeAttribute(a.name));
    saved.attrs.forEach(([name, value]) => el.setAttribute(name, value));
    el.innerHTML = saved.html;
  };
  // The markup inside a root as written: Kodza components already running in it give back their own
  const written = (root) => {
    const all = [...root.querySelectorAll('*')];
    if (!all.some((el) => el[KODZA])) return root.innerHTML;
    const copy = root.cloneNode(true);
    const twins = copy.querySelectorAll('*');
    let last = null;
    all.forEach((el, i) => {
      if (!el[KODZA] || last?.contains(el)) return;
      last = el;
      put(twins[i], el[KODZA]);
    });
    return copy.innerHTML;
  };
  const init = (scope) => find(scope).forEach((root) => {
    // Already running, maybe from another copy of this script. Marked is-ready with no Kodza component
    // running on it, a root is a copy of a started one (a cloned slide): it is left as it is
    if (root[RUNNING] || (root.classList.contains('is-ready') && !root[KODZA])) return;
    // Rendered by React (data-kodza-manual): React starts it, with an init aimed at that markup once
    // it has hydrated it. Any earlier start would change markup React has not taken over yet
    const owner = root.closest('[data-kodza-manual]');
    if (owner && !(scope && owner.contains(scope))) return;
    const controller = new AbortController();
    // Another Kodza component already running on this root: its markup as written is kept, and the
    // two stop together
    const before = root[KODZA];
    const saved = { html: before ? before.html : written(root), attrs: before ? before.attrs : attrsOf(root), stop: () => destroy(root) };
    if (before) before.above = saved;
    instances.set(root, { controller, saved, before });
    root[KODZA] = saved;
    root[RUNNING] = true;
    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.saved.above?.stop(); // a Kodza component started after it on the same root stops first
    // The Kodza components running inside it stop first: once its markup is put back, their own
    // script could not find them any more
    root.querySelectorAll('*').forEach((el) => el[KODZA]?.stop());
    instance.controller.abort();
    delete root[RUNNING];
    // Started on top of another one: that one stops next, and puts the markup back
    if (instance.before) {
      delete instance.before.above;
      root[KODZA] = instance.before;
      return instance.before.stop();
    }
    delete root[KODZA];
    put(root, instance.saved);
  });
  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).