# 3D Press Button

> A button with real thickness: the face sinks into its base, even the quickest tap goes all the way down, and it springs back with a small bounce. A keycap, a brutalist slab, or a toggle that stays down.

Buttons · button, press, 3d, click, toggle · HTML, CSS, vanilla JS · no dependencies · updated 2026-10-19
Demo: https://kodza.dev/components/press-button/

## Files

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

- [`kodza-press-button.css`](https://kodza.dev/registry/press-button/kodza-press-button.css) · 8.2 KB
- [`kodza-press-button.js`](https://kodza.dev/registry/press-button/kodza-press-button.js) · 4.6 KB
- [`kodza-press-button.html`](https://kodza.dev/registry/press-button/kodza-press-button.html) · 0.5 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-press-button.css https://kodza.dev/registry/press-button/kodza-press-button.css
curl -fsSL --create-dirs -o kodza/kodza-press-button.js https://kodza.dev/registry/press-button/kodza-press-button.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-press-button`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-press-face: #ffffff`
  - `--kz-press-fg: #0a0a0a`
  - `--kz-press-edge: #0a0a0a` — the thickness, and the outline of the face
  - `--kz-press-focus: #0a0a0a`
  - `--kz-press-line: 1.5px`
  - `--kz-press-radius: 999px`
  - `--kz-press-height: 52px`
  - `--kz-press-pad-x: 28px`
  - `--kz-press-gap: 10px`
  - `--kz-press-depth-x: 0px`
  - `--kz-press-depth-y: 6px`
  - `--kz-press-lift: calc(1 / 3)` — share of the depth the face rises on hover (2px of 6: whole pixels, crisp text)
  - `--kz-press-latch: 0.5` — how far down a latched toggle stays (3px of 6: whole pixels, crisp text)
  - `--kz-press-down: 0.08s cubic-bezier(0.3, 0, 0.6, 1)`
  - `--kz-press-up: 0.45s cubic-bezier(0.3, 1.9, 0.5, 1)`
  - `--kz-press-hover: 0.25s cubic-bezier(0.22, 1, 0.36, 1)`
- Modifiers: `.kodza-press-button--offset`
- 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 toggle (focus in `.kodza-press-button[aria-pressed]`):
  - `Enter` / `Space`: Flips it, the face stays down while it is on
- On the button (focus in `.kodza-press-button`):
  - `Enter` / `Space`: Presses the face down, springs back on release

## 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-press-button {
    --kz-press-face: #161616;
    --kz-press-fg: #f2f2f0;
    --kz-press-edge: #3d3d3c;
    --kz-press-focus: #f2f2f0;
  }
}
```

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

## Use it

### Plain HTML page

- CSS: `kodza/kodza-press-button.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-press-button.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-press-button.js`, loaded with `<script src="kodza/kodza-press-button.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$/{r kodza/kodza-press-button.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-press-button.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.
- This one is inline (it flows like a word): pasted alone, many themes leave it at the edge of the page (block themes, and classic ones like Twenty Twenty-One or Blocksy), so put the Custom HTML block inside a **Group** block to line it up with the text.
- 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-press-button', $uri . 'kodza-press-button.css', [], filemtime($dir . 'kodza-press-button.css'));
    wp_enqueue_script('kodza-press-button', $uri . 'kodza-press-button.js', [], filemtime($dir . 'kodza-press-button.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-press-button { --kz-press-fg: var(TEXT, #0a0a0a); }`
  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-press-button.css` and `assets/kodza-press-button.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-press-button.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-press-button.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/`): `3DPressButton.tsx` (below), the CSS block under Code saved as `press-button.css` and the JS block as `press-button.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { 3DPressButton } from '@/components/kodza/3DPressButton';` then `<3DPressButton>Deploy on Friday</3DPressButton>`. Props: `variant` ("offset", or several in an array), `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-press-face': … }}`), `children` (the text, plain), `className`, `style` and the other props of its `<button>` (`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 './press-button.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 — 3D Press Button, for React. From https://kodza.dev/components/press-button/
// 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: press-button.css and press-button.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 './press-button.css';

type Variant = "offset";

export type 3DPressButtonProps = Omit<ComponentPropsWithoutRef<'button'>, "children" | "variant" | "vars"> & {
  /** Modifier class(es): .kodza-press-button--offset */
  variant?: Variant | Variant[];
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #ffffff */
    "--kz-press-face"?: string | number;
    /** default: #0a0a0a */
    "--kz-press-fg"?: string | number;
    /** the thickness, and the outline of the face — default: #0a0a0a */
    "--kz-press-edge"?: string | number;
    /** default: #0a0a0a */
    "--kz-press-focus"?: string | number;
    /** default: 1.5px */
    "--kz-press-line"?: string | number;
    /** default: 999px */
    "--kz-press-radius"?: string | number;
    /** default: 52px */
    "--kz-press-height"?: string | number;
    /** default: 28px */
    "--kz-press-pad-x"?: string | number;
    /** default: 10px */
    "--kz-press-gap"?: string | number;
    /** default: 0px */
    "--kz-press-depth-x"?: string | number;
    /** default: 6px */
    "--kz-press-depth-y"?: string | number;
    /** share of the depth the face rises on hover (2px of 6: whole pixels, crisp text) — default: calc(1 / 3) */
    "--kz-press-lift"?: string | number;
    /** how far down a latched toggle stays (3px of 6: whole pixels, crisp text) — default: 0.5 */
    "--kz-press-latch"?: string | number;
    /** default: 0.08s cubic-bezier(0.3, 0, 0.6, 1) */
    "--kz-press-down"?: string | number;
    /** default: 0.45s cubic-bezier(0.3, 1.9, 0.5, 1) */
    "--kz-press-up"?: string | number;
    /** default: 0.25s cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-press-hover"?: string | number;
  };
  /** The text, plain: the script reads it and rebuilds the markup around it */
  children?: string;
  className?: string;
};

export function 3DPressButton({ variant, vars, children = "Deploy on Friday", className, style, ...rest }: 3DPressButtonProps) {
  const ref = useRef<ComponentRef<'button'>>(null);
  const classes = ["kodza-press-button", ...([] as string[]).concat(variant ?? []).map((v) => `kodza-press-button--${v}`), 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, children, 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('./press-button.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 (
    <button type="button" key={key} {...rest} className={classes} style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <span className="kodza-press-button__face">{children}</span>
    </button>
  );
}
```

## Code

```html
<button class="kodza-press-button" type="button">
  <span class="kodza-press-button__face">Deploy on Friday</span>
</button>

<button class="kodza-press-button kodza-press-button--offset" type="button">
  <span class="kodza-press-button__face">Push to prod</span>
</button>

<button class="kodza-press-button" type="button" aria-pressed="false">
  <span class="kodza-press-button__face">
    <span class="kodza-press-button__dot" aria-hidden="true"></span>
    Mute Slack
  </span>
</button>
```

```css
/* Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license */
/* Kodza — 3D Press Button
   A button with real thickness: the face sinks into its base when pressed, every tap goes all
   the way down, and it springs back with a small bounce.
   Everything is tuned with the --kz-press-* variables. */
.kodza-press-button {
  --kz-press-face: #ffffff;
  --kz-press-fg: #0a0a0a;
  --kz-press-edge: #0a0a0a; /* the thickness, and the outline of the face */
  --kz-press-focus: #0a0a0a;
  --kz-press-line: 1.5px;
  --kz-press-radius: 999px;
  --kz-press-height: 52px;
  --kz-press-pad-x: 28px;
  --kz-press-gap: 10px;
  --kz-press-depth-x: 0px;
  --kz-press-depth-y: 6px;
  --kz-press-lift: calc(1 / 3); /* share of the depth the face rises on hover (2px of 6: whole pixels, crisp text) */
  --kz-press-latch: 0.5; /* how far down a latched toggle stays (3px of 6: whole pixels, crisp text) */
  --kz-press-down: 0.08s cubic-bezier(0.3, 0, 0.6, 1);
  --kz-press-up: 0.45s cubic-bezier(0.3, 1.9, 0.5, 1);
  --kz-press-hover: 0.25s cubic-bezier(0.22, 1, 0.36, 1);

  position: relative;
  display: inline-grid;
  box-sizing: border-box;
  margin: 0;
  /* The room the face travels into */
  padding: 0 var(--kz-press-depth-x) var(--kz-press-depth-y) 0;
  border: 0;
  border-radius: var(--kz-press-radius);
  background: none;
  color: var(--kz-press-fg);
  font: inherit;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  isolation: isolate;
  user-select: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.kodza-press-button:focus-visible {
  outline: 2px solid var(--kz-press-focus);
  outline-offset: 4px;
}

/* The base: the same shape as the face, pushed down by the depth. What shows below the face
   is the thickness. */
.kodza-press-button::before {
  content: "";
  grid-area: 1 / 1;
  z-index: -1;
  border-radius: var(--kz-press-radius);
  background: var(--kz-press-edge);
  transform: translate(var(--kz-press-depth-x), var(--kz-press-depth-y));
}

/* The face is filled with the edge color and its inner layer, cut in by the line width, brings
   the face color: the outer edge matches the base, so no hairline shows between them (an inset
   shadow leaves one). Both edges of the line are cut by clip-path, which is not snapped to whole
   pixels like a border, an inset or a background: the line stays even wherever the face lands */
.kodza-press-button__face {
  position: relative;
  grid-area: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--kz-press-gap);
  box-sizing: border-box;
  height: var(--kz-press-height);
  padding: 0 var(--kz-press-pad-x);
  border-radius: var(--kz-press-radius);
  background: var(--kz-press-edge);
  box-shadow: 0 0 0 1px var(--kz-press-edge); /* covers the snapped background, the clip cuts it */
  clip-path: inset(0 round var(--kz-press-radius));
  isolation: isolate;
  transition: transform var(--kz-press-hover);
}

.kodza-press-button__face::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--kz-press-face);
  clip-path: inset(var(--kz-press-line) round calc(var(--kz-press-radius) - var(--kz-press-line)));
}

/* Hover: the face rises a little, the thickness grows */
@media (hover: hover) {
  .kodza-press-button:hover .kodza-press-button__face {
    transform: translate(calc(var(--kz-press-depth-x) * var(--kz-press-lift) * -1), calc(var(--kz-press-depth-y) * var(--kz-press-lift) * -1));
  }
}

/* A latching toggle (aria-pressed="true") stays part of the way down */
.kodza-press-button[aria-pressed="true"] .kodza-press-button__face {
  transform: translate(calc(var(--kz-press-depth-x) * var(--kz-press-latch)), calc(var(--kz-press-depth-y) * var(--kz-press-latch)));
}

/* Pressed: the face meets its base, fast */
.kodza-press-button.is-pressed .kodza-press-button__face,
.kodza-press-button:not(.is-ready):active .kodza-press-button__face {
  transform: translate(var(--kz-press-depth-x), var(--kz-press-depth-y));
  transition: transform var(--kz-press-down);
}

/* Let go: it springs back past its rest, then settles */
.kodza-press-button.is-releasing .kodza-press-button__face {
  transition: transform var(--kz-press-up);
}

/* Disabled: flush with its base, it cannot go any lower */
.kodza-press-button:disabled,
.kodza-press-button[aria-disabled="true"] {
  cursor: not-allowed;
}

.kodza-press-button:disabled .kodza-press-button__face,
.kodza-press-button[aria-disabled="true"] .kodza-press-button__face {
  transform: translate(var(--kz-press-depth-x), var(--kz-press-depth-y));
  color: color-mix(in srgb, currentColor 45%, transparent);
}

/* The toggle's light: an empty ring that fills while it is on */
.kodza-press-button__dot {
  position: relative;
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 var(--kz-press-line) currentColor;
}

.kodza-press-button__dot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: currentColor;
  transform: scale(0);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.kodza-press-button[aria-pressed="true"] .kodza-press-button__dot::after {
  transform: scale(1);
}

/* Offset variant: a brutalist slab, its hard shadow cast down and to the right */
.kodza-press-button--offset {
  --kz-press-radius: 12px;
  --kz-press-depth-x: 6px;
  --kz-press-depth-y: 6px;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-press-button__face,
  .kodza-press-button__dot::after {
    transition-duration: 0.01ms !important;
  }
}

/* Theming example — on a dark background:
.dark-section .kodza-press-button {
  --kz-press-face: #161616;
  --kz-press-fg: #f2f2f0;
  --kz-press-edge: #3d3d3c;
  --kz-press-focus: #f2f2f0;
}
*/

/* kodza-guard 834988a88cc3 — 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-press-button):not(#_) {
  outline: revert;
  outline-offset: revert;
}

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

.kodza-press-button:not(#_) {
  transition: revert;
  list-style: revert;
  box-shadow: revert;
  appearance: revert;
  max-height: revert;
  text-transform: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  min-height: revert;
}

.kodza-press-button__dot:not(#_) {
  box-sizing: revert;
}

.kodza-press-button:not(#_)::before,
.kodza-press-button__face:not(#_)::before,
.kodza-press-button__dot: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-press-button:not(#_) {
  position: relative;
  display: inline-grid;
  box-sizing: border-box;
  margin: 0;
  padding: 0 var(--kz-press-depth-x) var(--kz-press-depth-y) 0;
  border: 0;
  border-radius: var(--kz-press-radius);
  background: none;
  color: var(--kz-press-fg);
  font: inherit;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  isolation: isolate;
  user-select: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.kodza-press-button:focus-visible:not(#_) {
  outline: 2px solid var(--kz-press-focus);
  outline-offset: 4px;
}

.kodza-press-button:not(#_)::before {
  content: "";
  grid-area: 1 / 1;
  z-index: -1;
  border-radius: var(--kz-press-radius);
  background: var(--kz-press-edge);
  transform: translate(var(--kz-press-depth-x), var(--kz-press-depth-y));
}

.kodza-press-button:disabled:not(#_),
.kodza-press-button[aria-disabled="true"]:not(#_) {
  cursor: not-allowed;
}
```

```js
// Kodza License: free to use, client work included. Not to resell or redistribute, ported or not: https://kodza.dev/docs/#print-license
// Kodza — 3D Press Button
// Presses the face for the pointer, Enter and Space alike, makes every tap go all the way down
// before it springs back, and flips aria-pressed on a latching toggle.
(() => {
  const SELECTOR = '.kodza-press-button';
  const TRAVEL = 110; // ms: a tap shorter than the way down (80 ms, plus a late frame) still reaches the bottom
  const SPRING = 450; // ms: the bounce back, as long as --kz-press-up

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(button, signal) {
    let downAt = 0;
    let timer = 0;
    let key = null;
    let pointer = null; // listens for the end of a pointer press, wherever the pointer goes
    signal.addEventListener('abort', () => {
      clearTimeout(timer);
      pointer?.abort();
    });

    const disabled = () => button.disabled || button.getAttribute('aria-disabled') === 'true';

    const press = () => {
      clearTimeout(timer);
      button.classList.remove('is-releasing');
      button.classList.add('is-pressed');
      downAt = performance.now();
    };

    const release = () => {
      if (!button.classList.contains('is-pressed')) return;
      clearTimeout(timer);
      // A quick tap still lands at the bottom before the spring sends it back up
      timer = setTimeout(() => {
        button.classList.remove('is-pressed');
        button.classList.add('is-releasing');
        timer = setTimeout(() => button.classList.remove('is-releasing'), SPRING);
      }, Math.max(0, TRAVEL - (performance.now() - downAt)));
    };

    button.addEventListener('pointerdown', (event) => {
      if (event.button !== 0 || disabled()) return;
      press();
      pointer?.abort();
      pointer = new AbortController();
      const end = () => {
        pointer.abort();
        release();
      };
      document.addEventListener('pointerup', end, { signal: pointer.signal });
      document.addEventListener('pointercancel', end, { signal: pointer.signal });
    }, { signal });

    // The keyboard presses it too: Enter on links and buttons, Space on buttons
    button.addEventListener('keydown', (event) => {
      if (event.repeat || key || disabled()) return;
      if (event.key === 'Enter' || (event.key === ' ' && button.localName === 'button')) {
        key = event.key;
        press();
      }
    }, { signal });
    button.addEventListener('keyup', (event) => {
      if (event.key !== key) return;
      key = null;
      release();
    }, { signal });
    button.addEventListener('blur', () => {
      if (!key) return;
      key = null;
      release();
    }, { signal });

    // A latching toggle: each press flips it, and the face stays down while it is on
    if (button.hasAttribute('aria-pressed')) {
      button.addEventListener('click', () => {
        if (disabled()) return;
        button.setAttribute('aria-pressed', String(button.getAttribute('aria-pressed') !== 'true'));
      }, { signal });
    }
  }

  // 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).