# Expandable Card

> A row of cards where one is always open: click another and it widens while the others step back. Stacked on small screens.

Cards · card, accordion, expand, click · HTML, CSS, vanilla JS · no dependencies · updated 2026-10-21
Demo: https://kodza.dev/components/expandable-card/

## Files

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

- [`kodza-expandable-card.css`](https://kodza.dev/registry/expandable-card/kodza-expandable-card.css) · 12.0 KB
- [`kodza-expandable-card.js`](https://kodza.dev/registry/expandable-card/kodza-expandable-card.js) · 4.9 KB
- [`kodza-expandable-card.html`](https://kodza.dev/registry/expandable-card/kodza-expandable-card.html) · 1.4 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-expandable-card.css https://kodza.dev/registry/expandable-card/kodza-expandable-card.css
curl -fsSL --create-dirs -o kodza/kodza-expandable-card.js https://kodza.dev/registry/expandable-card/kodza-expandable-card.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-expand`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-expand-bg: #ffffff`
  - `--kz-expand-fg: #0a0a0a`
  - `--kz-expand-muted: rgba(10, 10, 10, 0.62)`
  - `--kz-expand-border: rgba(10, 10, 10, 0.1)`
  - `--kz-expand-open-bg: #0a0a0a`
  - `--kz-expand-open-fg: #ffffff`
  - `--kz-expand-open-muted: rgba(255, 255, 255, 0.68)`
  - `--kz-expand-height: 300px`
  - `--kz-expand-grow: 2.6`
  - `--kz-expand-radius: 16px`
  - `--kz-expand-pad: 28px`
  - `--kz-expand-duration: 0.75s`
  - `--kz-expand-ease: cubic-bezier(0.76, 0, 0.24, 1)`
  - `--kz-expand-text-ease: cubic-bezier(0.16, 1, 0.3, 1)`
- Lifecycle: `kodza:init` / `kodza:destroy` on `document`, with `{ detail: { root } }` to target a container.

## 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-expand {
    --kz-expand-bg: #161616;
    --kz-expand-fg: #f2f2f0;
    --kz-expand-muted: rgba(242, 242, 240, 0.62);
    --kz-expand-border: rgba(255, 255, 255, 0.12);
    --kz-expand-open-bg: #ffffff;
    --kz-expand-open-fg: #0a0a0a;
    --kz-expand-open-muted: rgba(10, 10, 10, 0.68);
  }
}
```

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

## Use it

### Plain HTML page

- CSS: `kodza/kodza-expandable-card.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-expandable-card.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-expandable-card.js`, loaded with `<script src="kodza/kodza-expandable-card.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$/{r kodza/kodza-expandable-card.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-expandable-card.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">`.
- 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-expandable-card', $uri . 'kodza-expandable-card.css', [], filemtime($dir . 'kodza-expandable-card.css'));
    wp_enqueue_script('kodza-expandable-card', $uri . 'kodza-expandable-card.js', [], filemtime($dir . 'kodza-expandable-card.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: by default, match the theme's palette. After the component's CSS, point these variables at the theme's colours, on the component root, Kodza's value as the fallback:
  `.kodza-expand { --kz-expand-fg: var(TEXT, #0a0a0a); --kz-expand-bg: var(BACKGROUND, #ffffff); }`
  TEXT, BACKGROUND and ACCENT (the colour the theme fills its own buttons with) are the theme's own colour variables — block themes (theme.json, like Twenty Twenty-Five): `--wp--preset--color--contrast`, `--wp--preset--color--base`, `--wp--preset--color--contrast` (they fill their buttons with it; their accent-1… colours are decorative); Astra: `--ast-global-color-2`, `--ast-global-color-4`, `--ast-global-color-0`; Kadence: `--global-palette3`, `--global-palette9`, `--global-palette1`; GeneratePress: `--contrast`, `--base-3`, `--accent`; Blocksy: `--theme-palette-color-4`, `--theme-palette-color-8`, `--theme-palette-color-1`. Use only these names, and only if the site really has them (the theme's CSS, or Styles → Colors): the `--wp--preset--color--black`, `--white`, `--vivid-…` that WordPress adds everywhere are not the theme's palette. Another theme, or one without these variables (Hello Elementor, OceanWP): leave the variables alone, it keeps Kodza's monochrome; same when the developer asks for monochrome or the Kodza look. Leave the translucent greys (`rgba(10, 10, 10, …)`) as they are: they suit any light background. On a dark palette, set the other variables from Dark mode too.
- 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-expandable-card.css` and `assets/kodza-expandable-card.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-expandable-card.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-expandable-card.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/`): `ExpandableCard.tsx` (below), the CSS block under Code saved as `expandable-card.css` and the JS block as `expandable-card.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { ExpandableCard } from '@/components/kodza/ExpandableCard';` then `<ExpandableCard />`. Props: `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-expand-bg': … }}`), `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 './expandable-card.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 — Expandable Card, for React. From https://kodza.dev/components/expandable-card/
// 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: expandable-card.css and expandable-card.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 './expandable-card.css';

export type ExpandableCardProps = Omit<ComponentPropsWithoutRef<'div'>, "children" | "vars"> & {
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #ffffff */
    "--kz-expand-bg"?: string | number;
    /** default: #0a0a0a */
    "--kz-expand-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.62) */
    "--kz-expand-muted"?: string | number;
    /** default: rgba(10, 10, 10, 0.1) */
    "--kz-expand-border"?: string | number;
    /** default: #0a0a0a */
    "--kz-expand-open-bg"?: string | number;
    /** default: #ffffff */
    "--kz-expand-open-fg"?: string | number;
    /** default: rgba(255, 255, 255, 0.68) */
    "--kz-expand-open-muted"?: string | number;
    /** default: 300px */
    "--kz-expand-height"?: string | number;
    /** default: 2.6 */
    "--kz-expand-grow"?: string | number;
    /** default: 16px */
    "--kz-expand-radius"?: string | number;
    /** default: 28px */
    "--kz-expand-pad"?: string | number;
    /** default: 0.75s */
    "--kz-expand-duration"?: string | number;
    /** default: cubic-bezier(0.76, 0, 0.24, 1) */
    "--kz-expand-ease"?: string | number;
    /** default: cubic-bezier(0.16, 1, 0.3, 1) */
    "--kz-expand-text-ease"?: string | number;
  };
  className?: string;
};

export function ExpandableCard({ vars, className, style, ...rest }: ExpandableCardProps) {
  const ref = useRef<ComponentRef<'div'>>(null);
  const classes = ["kodza-expand", 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('./expandable-card.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}>
      <article className="kodza-expand__card is-open">
        <h3 className="kodza-expand__heading">
          <button className="kodza-expand__toggle" type="button" aria-expanded="true">
            <span className="kodza-expand__index">01</span>
            {' '}
            <span className="kodza-expand__title">Install</span>
          </button>
        </h3>
        <div className="kodza-expand__panel">
          <p>One file, no npm, no build step. Copy it, paste it, refresh. That's the whole tutorial.</p>
        </div>
      </article>
      <article className="kodza-expand__card">
        <h3 className="kodza-expand__heading">
          <button className="kodza-expand__toggle" type="button" aria-expanded="false">
            <span className="kodza-expand__index">02</span>
            {' '}
            <span className="kodza-expand__title">Tweak</span>
          </button>
        </h3>
        <div className="kodza-expand__panel">
          <p>Every color, size and timing is a CSS variable. Rebrand it in thirty seconds, no fork needed.</p>
        </div>
      </article>
      <article className="kodza-expand__card">
        <h3 className="kodza-expand__heading">
          <button className="kodza-expand__toggle" type="button" aria-expanded="false">
            <span className="kodza-expand__index">03</span>
            {' '}
            <span className="kodza-expand__title">Ship</span>
          </button>
        </h3>
        <div className="kodza-expand__panel">
          <p>It works in WordPress, Webflow or a plain HTML page. Then go home early.</p>
        </div>
      </article>
    </div>
  );
}
```

## Code

```html
<div class="kodza-expand">
  <article class="kodza-expand__card is-open">
    <h3 class="kodza-expand__heading">
      <button class="kodza-expand__toggle" type="button" aria-expanded="true">
        <span class="kodza-expand__index">01</span>
        <span class="kodza-expand__title">Install</span>
      </button>
    </h3>
    <div class="kodza-expand__panel">
      <p>One file, no npm, no build step. Copy it, paste it, refresh. That's the whole tutorial.</p>
    </div>
  </article>
  <article class="kodza-expand__card">
    <h3 class="kodza-expand__heading">
      <button class="kodza-expand__toggle" type="button" aria-expanded="false">
        <span class="kodza-expand__index">02</span>
        <span class="kodza-expand__title">Tweak</span>
      </button>
    </h3>
    <div class="kodza-expand__panel">
      <p>Every color, size and timing is a CSS variable. Rebrand it in thirty seconds, no fork needed.</p>
    </div>
  </article>
  <article class="kodza-expand__card">
    <h3 class="kodza-expand__heading">
      <button class="kodza-expand__toggle" type="button" aria-expanded="false">
        <span class="kodza-expand__index">03</span>
        <span class="kodza-expand__title">Ship</span>
      </button>
    </h3>
    <div class="kodza-expand__panel">
      <p>It works in WordPress, Webflow or a plain HTML page. Then go home early.</p>
    </div>
  </article>
</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 — Expandable Card
   A row of cards where one is always open: click another and it widens while the others
   step back, then its text rises line by line. Stacked on small screens.
   The open card is inverted (ink on light pages, white on dark ones).
   Everything is tuned with the --kz-expand-* variables. */
.kodza-expand {
  --kz-expand-bg: #ffffff;
  --kz-expand-fg: #0a0a0a;
  --kz-expand-muted: rgba(10, 10, 10, 0.62);
  --kz-expand-border: rgba(10, 10, 10, 0.1);
  --kz-expand-open-bg: #0a0a0a;
  --kz-expand-open-fg: #ffffff;
  --kz-expand-open-muted: rgba(255, 255, 255, 0.68);
  --kz-expand-height: 300px;
  --kz-expand-grow: 2.6;
  --kz-expand-radius: 16px;
  --kz-expand-pad: 28px;
  --kz-expand-duration: 0.75s;
  --kz-expand-ease: cubic-bezier(0.76, 0, 0.24, 1);
  --kz-expand-text-ease: cubic-bezier(0.16, 1, 0.3, 1);

  display: flex;
  gap: 12px;
  height: var(--kz-expand-height);
}

.kodza-expand__card {
  position: relative;
  display: flex;
  flex: 1 1 0;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
  overflow: hidden;
  padding: var(--kz-expand-pad);
  border-radius: var(--kz-expand-radius);
  background: var(--kz-expand-bg);
  box-shadow: inset 0 0 0 1px var(--kz-expand-border);
  color: var(--kz-expand-fg);
  isolation: isolate;
  /* The text changes color as the ink passes it: early when it drains, late when it rises */
  transition:
    flex-grow var(--kz-expand-duration) var(--kz-expand-ease),
    color 0.15s ease calc(var(--kz-expand-duration) * 0.25);
}

.kodza-expand__card.is-open {
  flex-grow: var(--kz-expand-grow);
  color: var(--kz-expand-open-fg);
  transition:
    flex-grow var(--kz-expand-duration) var(--kz-expand-ease),
    color 0.15s ease calc(var(--kz-expand-duration) * 0.55);
}

/* The open card fills with ink from the bottom, rather than fading through grey */
.kodza-expand__card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--kz-expand-open-bg);
  transform: scaleY(0);
  transform-origin: 50% 100%;
  transition: transform var(--kz-expand-duration) var(--kz-expand-ease);
}

.kodza-expand__card.is-open::before {
  transform: none;
}

.kodza-expand__heading {
  margin: 0;
  font: inherit;
}

/* The button covers the whole card: click anywhere on it */
.kodza-expand__toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.kodza-expand__toggle::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.kodza-expand__toggle:focus-visible {
  outline: none;
}

.kodza-expand__card:has(.kodza-expand__toggle:focus-visible) {
  outline: 2px solid var(--kz-expand-fg);
  outline-offset: 3px;
}

.kodza-expand__index {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  color: var(--kz-expand-muted);
  transition: color 0.15s ease calc(var(--kz-expand-duration) * 0.25);
}

.kodza-expand__card.is-open .kodza-expand__index {
  color: var(--kz-expand-open-muted);
  transition-delay: calc(var(--kz-expand-duration) * 0.55);
}

.kodza-expand__title {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

/* The text is set at the width it will have once the card is open (--kz-expand-text, measured
   by the script), so it never reflows while the card widens. It leaves at once when a card closes. */
.kodza-expand__panel {
  width: var(--kz-expand-text, auto);
  max-width: 360px;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.15s ease, visibility 0s linear 0.3s;
}

.kodza-expand__card.is-open .kodza-expand__panel {
  visibility: visible;
  opacity: 1;
  transition: opacity 0.4s ease calc(var(--kz-expand-duration) * 0.5), visibility 0s;
}

/* With the script, the text rises line by line from behind a mask instead */
.kodza-expand.is-ready .kodza-expand__card.is-open .kodza-expand__panel {
  transition: visibility 0s;
}

.kodza-expand__line {
  display: block;
  overflow: hidden;
}

.kodza-expand__line > span {
  display: block;
  transform: translateY(110%);
  transition: transform 0.25s ease-in;
}

.kodza-expand__card.is-open .kodza-expand__line > span {
  transform: none;
  transition: transform 0.8s var(--kz-expand-text-ease) calc(var(--kz-expand-duration) * 0.45 + var(--kz-line, 0) * 90ms);
}

.kodza-expand__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--kz-expand-open-muted);
}

@media (max-width: 640px) {
  .kodza-expand {
    flex-direction: column;
    height: auto;
  }

  .kodza-expand__card {
    display: grid;
    flex: none;
    grid-template-rows: auto 0fr;
    gap: 0;
    transition:
      grid-template-rows var(--kz-expand-duration) var(--kz-expand-ease),
      color 0.15s ease calc(var(--kz-expand-duration) * 0.25);
  }

  .kodza-expand__card.is-open {
    grid-template-rows: auto 1fr;
    transition:
      grid-template-rows var(--kz-expand-duration) var(--kz-expand-ease),
      color 0.15s ease calc(var(--kz-expand-duration) * 0.55);
  }

  .kodza-expand__panel {
    max-width: none;
    overflow: hidden;
  }

  .kodza-expand__panel p {
    padding-top: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kodza-expand__card,
  .kodza-expand__card::before,
  .kodza-expand__index,
  .kodza-expand__panel,
  .kodza-expand__line > span {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-expand {
  --kz-expand-bg: #161616;
  --kz-expand-fg: #f2f2f0;
  --kz-expand-muted: rgba(242, 242, 240, 0.62);
  --kz-expand-border: rgba(255, 255, 255, 0.12);
  --kz-expand-open-bg: #ffffff;
  --kz-expand-open-fg: #0a0a0a;
  --kz-expand-open-muted: rgba(10, 10, 10, 0.68);
}
*/

/* kodza-guard adb5172deda8 — 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-expand__card):not(#_) {
  outline: revert;
  outline-offset: revert;
}

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

:where(.kodza-expand__panel p:where(:not([class*="kodza-"]):not(.kodza-expand__panel [class*="kodza-"] *))):not(#_) {
  padding-top: revert;
}

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

.kodza-expand:not(#_),
.kodza-expand__index:not(#_),
.kodza-expand__title:not(#_),
.kodza-expand__panel:not(#_),
.kodza-expand__line:not(#_),
.kodza-expand__line span:where(:not([class*="kodza-"])):not(#_) {
  box-sizing: revert;
}

.kodza-expand__card:not(#_) {
  border: revert;
  margin: revert;
  text-decoration: revert;
  list-style: revert;
  box-sizing: revert;
  float: 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;
}

.kodza-expand__heading:not(#_) {
  border: 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;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-expand__toggle:not(#_) {
  margin: revert;
  border-radius: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: revert;
  max-height: revert;
  letter-spacing: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
  white-space: revert;
  min-height: revert;
}

.kodza-expand__panel p:where(:not([class*="kodza-"]):not(.kodza-expand__panel [class*="kodza-"] *)):not(#_) {
  border: revert;
  border-radius: revert;
  outline: revert;
  text-decoration: revert;
  transition: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: revert;
  padding-right: revert;
  padding-bottom: revert;
  padding-left: revert;
  background-color: revert;
  background-image: revert;
  box-shadow: revert;
  outline-offset: revert;
  appearance: revert;
  max-width: 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;
}

.kodza-expand__heading:not(#_):where(:not([hidden])),
.kodza-expand__panel p:where(:not([class*="kodza-"]):not(.kodza-expand__panel [class*="kodza-"] *)):not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-expand__heading:not(#_):where([hidden]),
.kodza-expand__panel p:where(:not([class*="kodza-"]):not(.kodza-expand__panel [class*="kodza-"] *)):not(#_):where([hidden]) {
  display: none;
}

.kodza-expand__card:not(#_)::before,
.kodza-expand__toggle: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-expand__card:not(#_) {
  position: relative;
  display: flex;
  padding: var(--kz-expand-pad);
  border-radius: var(--kz-expand-radius);
  background: var(--kz-expand-bg);
  box-shadow: inset 0 0 0 1px var(--kz-expand-border);
  color: var(--kz-expand-fg);
  transition: flex-grow var(--kz-expand-duration) var(--kz-expand-ease),
    color 0.15s ease calc(var(--kz-expand-duration) * 0.25);
}

.kodza-expand__card.is-open:not(#_) {
  color: var(--kz-expand-open-fg);
  transition: flex-grow var(--kz-expand-duration) var(--kz-expand-ease),
    color 0.15s ease calc(var(--kz-expand-duration) * 0.55);
}

.kodza-expand__heading:not(#_) {
  margin: 0;
  font: inherit;
}

.kodza-expand__toggle:not(#_) {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.kodza-expand__toggle:not(#_)::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
}

.kodza-expand__toggle:focus-visible:not(#_) {
  outline: none;
}

.kodza-expand__card:has(.kodza-expand__toggle:focus-visible):not(#_) {
  outline: 2px solid var(--kz-expand-fg);
  outline-offset: 3px;
}

.kodza-expand__panel p:not(#_) {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--kz-expand-open-muted);
}

@media (max-width: 640px) {
  .kodza-expand__card:not(#_) {
    display: grid;
    transition: grid-template-rows var(--kz-expand-duration) var(--kz-expand-ease),
        color 0.15s ease calc(var(--kz-expand-duration) * 0.25);
  }
}

@media (max-width: 640px) {
  .kodza-expand__card.is-open:not(#_) {
    transition: grid-template-rows var(--kz-expand-duration) var(--kz-expand-ease),
        color 0.15s ease calc(var(--kz-expand-duration) * 0.55);
  }
}

@media (max-width: 640px) {
  .kodza-expand__panel p:not(#_) {
    padding-top: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kodza-expand__card:not(#_) {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !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 — Expandable Card
// Keeps exactly one card open per group, and tells screen readers which one it is.
// Each text is cut into lines at the width it will have once its card is open,
// so it can rise line by line and never reflows while the card widens.
(() => {
  const SELECTOR = '.kodza-expand';
  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const cards = [...root.querySelectorAll('.kodza-expand__card')];
    if (!cards.length) return;

    // Plain text only: a paragraph with links or markup keeps its fade
    const texts = new Map();
    root.querySelectorAll('.kodza-expand__panel p').forEach((p) => {
      if (!p.children.length) texts.set(p, p.textContent.trim().split(/\s+/));
    });

    const split = (p, words) => {
      p.textContent = '';
      const spans = words.map((word) => {
        const span = document.createElement('span');
        span.textContent = `${word} `;
        p.append(span);
        return span;
      });
      const lines = [];
      spans.forEach((span) => {
        const last = lines[lines.length - 1];
        if (last && last.top === span.offsetTop) last.words.push(span.textContent);
        else lines.push({ top: span.offsetTop, words: [span.textContent] });
      });
      p.textContent = '';
      lines.forEach((line, i) => {
        const outer = document.createElement('span');
        const inner = document.createElement('span');
        outer.className = 'kodza-expand__line';
        inner.textContent = line.words.join('').trim();
        inner.style.setProperty('--kz-line', i);
        outer.append(inner);
        p.append(outer, ' ');
      });
    };

    // The width of an open card's text: what is left once the closed cards took their share
    let measured = -1;
    const layout = () => {
      const style = getComputedStyle(root);
      const card = getComputedStyle(cards[0]);
      let width = root.clientWidth;
      if (style.flexDirection !== 'column') {
        const grow = parseFloat(style.getPropertyValue('--kz-expand-grow')) || 2.6;
        width = ((width - (parseFloat(style.columnGap) || 0) * (cards.length - 1)) * grow) / (grow + cards.length - 1);
      }
      width = Math.max(0, Math.floor(width - parseFloat(card.paddingLeft) - parseFloat(card.paddingRight)));
      if (width === measured) return;
      measured = width;
      root.style.setProperty('--kz-expand-text', `${width}px`);
      texts.forEach((words, p) => split(p, words));
    };

    const open = (card) => {
      cards.forEach((other) => {
        const isOpen = other === card;
        other.classList.toggle('is-open', isOpen);
        other.querySelector('.kodza-expand__toggle')?.setAttribute('aria-expanded', String(isOpen));
      });
    };

    cards.forEach((card) => card.querySelector('.kodza-expand__toggle')?.addEventListener('click', () => open(card), { signal }));
    open(cards.find((card) => card.classList.contains('is-open')) || cards[0]);
    layout();
    const observer = new ResizeObserver(layout);
    observer.observe(root);
    signal.addEventListener('abort', () => observer.disconnect());
    document.fonts?.ready.then(() => {
      if (signal.aborted) return;
      measured = -1;
      layout();
    });
  }

  // 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).