# Scroll Path

> A line drawn through the steps of a section as you read: it swings from step to step, fills each marker it reaches and ends with a ring around the button.

SVG & Drawing · svg, path, line drawing, scroll, how it works, process, steps, storytelling · HTML, CSS, vanilla JS · no dependencies · updated 2026-11-04
Demo: https://kodza.dev/components/scroll-path/
Source on GitHub: https://github.com/kodza-dev/kodza/tree/main/components/scroll-path

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

## Files

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

- [`kodza-scroll-path.css`](https://kodza.dev/registry/scroll-path/kodza-scroll-path.css) · 16.9 KB
- [`kodza-scroll-path.js`](https://kodza.dev/registry/scroll-path/kodza-scroll-path.js) · 15.2 KB
- [`kodza-scroll-path.html`](https://kodza.dev/registry/scroll-path/kodza-scroll-path.html) · 2.3 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-scroll-path.css https://kodza.dev/registry/scroll-path/kodza-scroll-path.css
curl -fsSL --create-dirs -o kodza/kodza-scroll-path.js https://kodza.dev/registry/scroll-path/kodza-scroll-path.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-scroll-path`
- Variables (set them on the root element itself: it declares its own defaults):
  - `--kz-scroll-path-fg: #0a0a0a`
  - `--kz-scroll-path-muted: rgba(10, 10, 10, 0.62)`
  - `--kz-scroll-path-bg: #f2f2f0` — the page behind the markers and around the pen
  - `--kz-scroll-path-ink: #0a0a0a` — the line, the pen and the markers it reached
  - `--kz-scroll-path-on-ink: #ffffff`
  - `--kz-scroll-path-track: rgba(10, 10, 10, 0.26)` — the dotted route, before the ink
  - `--kz-scroll-path-rim: rgba(10, 10, 10, 0.16)` — a marker not reached yet
  - `--kz-scroll-path-width: 2px` — thickness of the line
  - `--kz-scroll-path-marker: 44px`
  - `--kz-scroll-path-column: 440px` — width of a step
  - `--kz-scroll-path-gap: 200px` — between two steps: the swings live there
  - `--kz-scroll-path-ease: cubic-bezier(0.22, 1, 0.36, 1)`
- Attributes:
  - `data-path-marker`
  - `data-path-ring`
  - `data-path-stop`
- 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-scroll-path {
    --kz-scroll-path-fg: #f2f2f0;
    --kz-scroll-path-muted: rgba(242, 242, 240, 0.62);
    --kz-scroll-path-bg: #0a0a0a;
    --kz-scroll-path-ink: #f2f2f0;
    --kz-scroll-path-on-ink: #0a0a0a;
    --kz-scroll-path-track: rgba(255, 255, 255, 0.3);
    --kz-scroll-path-rim: rgba(255, 255, 255, 0.18);
  }
}
```

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

## Use it

### Plain HTML page

- CSS: `kodza/kodza-scroll-path.css` next to the page (the Files commands as they are), linked in `<head>`: `<link rel="stylesheet" href="kodza/kodza-scroll-path.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-scroll-path.js`, loaded with `<script src="kodza/kodza-scroll-path.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$/{r kodza/kodza-scroll-path.css' -e 'd' -e '}' -e '/^KODZA-JS$/{r kodza/kodza-scroll-path.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.
- 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-scroll-path', $uri . 'kodza-scroll-path.css', [], filemtime($dir . 'kodza-scroll-path.css'));
    wp_enqueue_script('kodza-scroll-path', $uri . 'kodza-scroll-path.js', [], filemtime($dir . 'kodza-scroll-path.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-scroll-path.css` and `assets/kodza-scroll-path.js` (the Files commands with `-o assets/…`).
- In the section: `{{ 'kodza-scroll-path.css' | asset_url | stylesheet_tag }}` and `<script src="{{ 'kodza-scroll-path.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/`): `ScrollPath.tsx` (below), the CSS block under Code saved as `scroll-path.css` and the JS block as `scroll-path.js`, both as they are. The HTML block is already inside the component: skip it.
- Use it: `import { ScrollPath } from '@/components/kodza/ScrollPath';` then `<ScrollPath />`. Props: `vars` (the `--kz-…` variables listed under API, e.g. `vars={{ '--kz-scroll-path-fg': … }}`), `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 './scroll-path.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 — Scroll Path, for React. From https://kodza.dev/components/scroll-path/
// 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: scroll-path.css and scroll-path.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 './scroll-path.css';

export type ScrollPathProps = Omit<ComponentPropsWithoutRef<'div'>, "children" | "vars"> & {
  /** Settings, as CSS variables on the root */
  vars?: {
    /** default: #0a0a0a */
    "--kz-scroll-path-fg"?: string | number;
    /** default: rgba(10, 10, 10, 0.62) */
    "--kz-scroll-path-muted"?: string | number;
    /** the page behind the markers and around the pen — default: #f2f2f0 */
    "--kz-scroll-path-bg"?: string | number;
    /** the line, the pen and the markers it reached — default: #0a0a0a */
    "--kz-scroll-path-ink"?: string | number;
    /** default: #ffffff */
    "--kz-scroll-path-on-ink"?: string | number;
    /** the dotted route, before the ink — default: rgba(10, 10, 10, 0.26) */
    "--kz-scroll-path-track"?: string | number;
    /** a marker not reached yet — default: rgba(10, 10, 10, 0.16) */
    "--kz-scroll-path-rim"?: string | number;
    /** thickness of the line — default: 2px */
    "--kz-scroll-path-width"?: string | number;
    /** default: 44px */
    "--kz-scroll-path-marker"?: string | number;
    /** width of a step — default: 440px */
    "--kz-scroll-path-column"?: string | number;
    /** between two steps: the swings live there — default: 200px */
    "--kz-scroll-path-gap"?: string | number;
    /** default: cubic-bezier(0.22, 1, 0.36, 1) */
    "--kz-scroll-path-ease"?: string | number;
  };
  className?: string;
};

export function ScrollPath({ vars, className, style, ...rest }: ScrollPathProps) {
  const ref = useRef<ComponentRef<'div'>>(null);
  const classes = ["kodza-scroll-path", 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('./scroll-path.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} data-kodza-manual style={{ ...vars, ...style } as CSSProperties} ref={ref}>
      <ol className="kodza-scroll-path__list">
        <li className="kodza-scroll-path__stop" data-path-stop="">
          <span className="kodza-scroll-path__marker" data-path-marker="" aria-hidden="true">01</span>
          <div className="kodza-scroll-path__body">
            <h3 className="kodza-scroll-path__title">Find it</h3>
            <p className="kodza-scroll-path__text">Search the catalogue, or ask your AI. It gets the exact files, not a guess at them.</p>
          </div>
        </li>
        <li className="kodza-scroll-path__stop" data-path-stop="">
          <span className="kodza-scroll-path__marker" data-path-marker="" aria-hidden="true">02</span>
          <div className="kodza-scroll-path__body">
            <h3 className="kodza-scroll-path__title">Copy it</h3>
            <p className="kodza-scroll-path__text">HTML, CSS, a few lines of JS. No package, no build step, no account to create.</p>
          </div>
        </li>
        <li className="kodza-scroll-path__stop" data-path-stop="">
          <span className="kodza-scroll-path__marker" data-path-marker="" aria-hidden="true">03</span>
          <div className="kodza-scroll-path__body">
            <h3 className="kodza-scroll-path__title">Paste it</h3>
            <p className="kodza-scroll-path__text">WordPress, Webflow, React or a plain page. It keeps to its own class and leaves yours alone.</p>
          </div>
        </li>
        <li className="kodza-scroll-path__stop" data-path-stop="">
          <span className="kodza-scroll-path__marker" data-path-marker="" aria-hidden="true">04</span>
          <div className="kodza-scroll-path__body">
            <h3 className="kodza-scroll-path__title">Tune it</h3>
            <p className="kodza-scroll-path__text">Colours, sizes and timings are variables at the top of the file. Change three, keep the rest.</p>
          </div>
        </li>
        <li className="kodza-scroll-path__stop" data-path-stop="">
          <span className="kodza-scroll-path__marker" data-path-marker="" aria-hidden="true">05</span>
          <div className="kodza-scroll-path__body">
            <h3 className="kodza-scroll-path__title">Ship it</h3>
            <p className="kodza-scroll-path__text">Tested in three themes before you saw it. It works on more than my machine.</p>
          </div>
        </li>
      </ol>
      <div className="kodza-scroll-path__end" data-path-stop="">
        <a className="kodza-scroll-path__cta" href="#" data-path-ring="">Browse components</a>
        <p className="kodza-scroll-path__note">Free. No sign-up.</p>
      </div>
    </div>
  );
}
```

## Code

```html
<div class="kodza-scroll-path">
  <ol class="kodza-scroll-path__list">
    <li class="kodza-scroll-path__stop" data-path-stop>
      <span class="kodza-scroll-path__marker" data-path-marker aria-hidden="true">01</span>
      <div class="kodza-scroll-path__body">
        <h3 class="kodza-scroll-path__title">Find it</h3>
        <p class="kodza-scroll-path__text">Search the catalogue, or ask your AI. It gets the exact files, not a guess at them.</p>
      </div>
    </li>
    <li class="kodza-scroll-path__stop" data-path-stop>
      <span class="kodza-scroll-path__marker" data-path-marker aria-hidden="true">02</span>
      <div class="kodza-scroll-path__body">
        <h3 class="kodza-scroll-path__title">Copy it</h3>
        <p class="kodza-scroll-path__text">HTML, CSS, a few lines of JS. No package, no build step, no account to create.</p>
      </div>
    </li>
    <li class="kodza-scroll-path__stop" data-path-stop>
      <span class="kodza-scroll-path__marker" data-path-marker aria-hidden="true">03</span>
      <div class="kodza-scroll-path__body">
        <h3 class="kodza-scroll-path__title">Paste it</h3>
        <p class="kodza-scroll-path__text">WordPress, Webflow, React or a plain page. It keeps to its own class and leaves yours alone.</p>
      </div>
    </li>
    <li class="kodza-scroll-path__stop" data-path-stop>
      <span class="kodza-scroll-path__marker" data-path-marker aria-hidden="true">04</span>
      <div class="kodza-scroll-path__body">
        <h3 class="kodza-scroll-path__title">Tune it</h3>
        <p class="kodza-scroll-path__text">Colours, sizes and timings are variables at the top of the file. Change three, keep the rest.</p>
      </div>
    </li>
    <li class="kodza-scroll-path__stop" data-path-stop>
      <span class="kodza-scroll-path__marker" data-path-marker aria-hidden="true">05</span>
      <div class="kodza-scroll-path__body">
        <h3 class="kodza-scroll-path__title">Ship it</h3>
        <p class="kodza-scroll-path__text">Tested in three themes before you saw it. It works on more than my machine.</p>
      </div>
    </li>
  </ol>
  <div class="kodza-scroll-path__end" data-path-stop>
    <a class="kodza-scroll-path__cta" href="#" data-path-ring>Browse components</a>
    <p class="kodza-scroll-path__note">Free. No sign-up.</p>
  </div>
</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 — Scroll Path
   One line drawn through the steps of a section as you read. It runs down beside each step,
   swings across to the next one in an S, inks each marker it reaches, and ends by drawing a
   ring around the button. The dotted route is there from the start: the plan, then the ink.
   Without the script, the steps are simply there. Everything is tuned with the
   --kz-scroll-path-* variables (the route itself with three attributes, see component.js). */
.kodza-scroll-path {
  --kz-scroll-path-fg: #0a0a0a;
  --kz-scroll-path-muted: rgba(10, 10, 10, 0.62);
  --kz-scroll-path-bg: #f2f2f0; /* the page behind the markers and around the pen */
  --kz-scroll-path-ink: #0a0a0a; /* the line, the pen and the markers it reached */
  --kz-scroll-path-on-ink: #ffffff;
  --kz-scroll-path-track: rgba(10, 10, 10, 0.26); /* the dotted route, before the ink */
  --kz-scroll-path-rim: rgba(10, 10, 10, 0.16); /* a marker not reached yet */
  --kz-scroll-path-width: 2px; /* thickness of the line */
  --kz-scroll-path-marker: 44px;
  --kz-scroll-path-column: 440px; /* width of a step */
  --kz-scroll-path-gap: 200px; /* between two steps: the swings live there */
  --kz-scroll-path-ease: cubic-bezier(0.22, 1, 0.36, 1);

  position: relative;
  isolation: isolate;
  color: var(--kz-scroll-path-fg);
}

/* The drawing, laid by the script under the steps: a block with a background hides the line
   that passes behind it */
.kodza-scroll-path__svg {
  position: absolute;
  top: 0;
  left: 0;
  overflow: visible;
  pointer-events: none;
}

.kodza-scroll-path__track,
.kodza-scroll-path__ink {
  fill: none;
  stroke-width: var(--kz-scroll-path-width);
  stroke-linecap: round;
  stroke-linejoin: round;
}

.kodza-scroll-path__track {
  stroke: var(--kz-scroll-path-track);
  stroke-dasharray: 0 8;
}

.kodza-scroll-path__ink {
  stroke: var(--kz-scroll-path-ink);
}

.kodza-scroll-path__pen {
  fill: var(--kz-scroll-path-ink);
  stroke: var(--kz-scroll-path-bg);
  stroke-width: 3;
  transition: opacity calc(0.3s * var(--kz-motion-scale, 1)) ease;
}

.kodza-scroll-path__pen.is-away {
  opacity: 0;
}

/* The steps, one on each side (a step's width short of the full width on a phone, so the
   line still swings) */
.kodza-scroll-path__list {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--kz-scroll-path-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.kodza-scroll-path__stop {
  display: grid;
  grid-template-columns: var(--kz-scroll-path-marker) minmax(0, 1fr);
  column-gap: 22px;
  align-items: start;
  width: min(calc(100% - var(--kz-scroll-path-marker)), var(--kz-scroll-path-column));
  margin: 0;
  padding: 0;
}

.kodza-scroll-path__stop:nth-child(even) {
  align-self: flex-end;
}

/* The marker the line passes through: it fills with ink from its centre when the line reaches it */
.kodza-scroll-path__marker {
  position: relative;
  z-index: 0;
  display: grid;
  place-items: center;
  width: var(--kz-scroll-path-marker);
  height: var(--kz-scroll-path-marker);
  border-radius: 50%;
  background: var(--kz-scroll-path-bg);
  box-shadow: inset 0 0 0 1px var(--kz-scroll-path-rim);
  color: var(--kz-scroll-path-muted);
  font-family: var(--kz-font-label, var(--kz-font-mono, "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace));
  font-size: var(--kz-font-label-size, 12px);
  font-weight: var(--kz-font-label-weight, inherit);
  line-height: 1;
  letter-spacing: var(--kz-font-label-tracking, inherit);
  transition: color calc(0.35s * var(--kz-motion-scale, 1)) ease;
}

.kodza-scroll-path__marker::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--kz-scroll-path-ink);
  transform: scale(0);
  transition: transform calc(0.5s * var(--kz-motion-scale, 1)) cubic-bezier(0.34, 1.4, 0.64, 1);
}

.kodza-scroll-path__stop.is-reached .kodza-scroll-path__marker {
  color: var(--kz-scroll-path-on-ink);
}

.kodza-scroll-path__stop.is-reached .kodza-scroll-path__marker::before {
  transform: scale(1);
}

.kodza-scroll-path__body {
  display: grid;
  gap: 10px;
  padding-top: 9px;
}

.kodza-scroll-path__title {
  margin: 0;
  font-family: var(--kz-font-display, inherit);
  font-size: calc(24px * var(--kz-font-display-scale, 1));
  font-weight: var(--kz-font-display-weight, 600);
  line-height: 1.1;
  letter-spacing: var(--kz-font-display-tracking, -0.03em);
  text-transform: var(--kz-font-display-case, inherit);
}

.kodza-scroll-path__text {
  max-width: 40ch;
  margin: 0;
  color: var(--kz-scroll-path-muted);
  font-size: 15px;
  line-height: 1.6;
  text-wrap: pretty;
}

/* The end: the line arrives on top of the button and draws its ring */
.kodza-scroll-path__end {
  position: relative;
  z-index: 1;
  display: grid;
  justify-items: center;
  gap: 22px;
  margin-top: var(--kz-scroll-path-gap);
  text-align: center;
}

.kodza-scroll-path__cta {
  display: inline-flex;
  align-items: center;
  height: 52px;
  padding: 0 28px;
  border-radius: var(--kz-radius-pill, 999px);
  background: var(--kz-scroll-path-ink);
  color: var(--kz-scroll-path-on-ink);
  font-family: var(--kz-font-label, inherit);
  font-size: var(--kz-font-label-size, 15px);
  font-weight: var(--kz-font-label-weight, 500);
  line-height: 1;
  letter-spacing: var(--kz-font-label-tracking, -0.01em);
  text-transform: var(--kz-font-label-case, revert);
  text-decoration: none;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transition: transform calc(0.25s * var(--kz-motion-scale, 1)) var(--kz-scroll-path-ease);
}

.kodza-scroll-path__cta:active {
  transform: scale(0.97);
}

.kodza-scroll-path__cta:focus-visible {
  outline: 2px solid var(--kz-scroll-path-ink);
  outline-offset: 3px;
}

.kodza-scroll-path__note {
  margin: 0;
  color: var(--kz-scroll-path-muted);
  font-family: var(--kz-font-label, var(--kz-font-mono, "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace));
  font-size: var(--kz-font-label-size, 12px);
  font-weight: var(--kz-font-label-weight, inherit);
  line-height: var(--kz-font-label-leading, 1.4);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  text-transform: var(--kz-font-label-case, inherit);
}

/* Each step arrives the first time it is seen (only once the script is there): the marker
   grows, the title rises from behind its own edge (the clip moves against the text, so its
   window stays put), then the text fades up */
.kodza-scroll-path__marker,
.kodza-scroll-path__title,
.kodza-scroll-path__text {
  transition:
    color calc(0.35s * var(--kz-motion-scale, 1)) ease,
    opacity calc(0.6s * var(--kz-motion-scale, 1)) ease,
    transform calc(0.8s * var(--kz-motion-scale, 1)) var(--kz-scroll-path-ease),
    clip-path calc(0.8s * var(--kz-motion-scale, 1)) var(--kz-scroll-path-ease);
}

.kodza-scroll-path__title {
  clip-path: inset(-20% -20% -20% -20%);
}

.kodza-scroll-path.is-ready .kodza-scroll-path__stop:not(.is-seen) .kodza-scroll-path__marker {
  opacity: 0;
  transform: scale(0.6);
}

.kodza-scroll-path.is-ready .kodza-scroll-path__stop:not(.is-seen) .kodza-scroll-path__title {
  transform: translateY(120%);
  clip-path: inset(-140% -20% 100% -20%);
}

.kodza-scroll-path.is-ready .kodza-scroll-path__stop:not(.is-seen) .kodza-scroll-path__text {
  opacity: 0;
  transform: translateY(14px);
}

.kodza-scroll-path__stop.is-seen .kodza-scroll-path__title {
  transition-delay: 0s, 0s, calc(0.08s * var(--kz-motion-scale, 1)), calc(0.08s * var(--kz-motion-scale, 1));
}

.kodza-scroll-path__stop.is-seen .kodza-scroll-path__text {
  transition-delay: 0s, calc(0.2s * var(--kz-motion-scale, 1)), calc(0.2s * var(--kz-motion-scale, 1)), 0s;
}

@media (hover: hover) {
  .kodza-scroll-path__cta:hover {
    transform: translateY(-1px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .kodza-scroll-path *,
  .kodza-scroll-path *::before,
  .kodza-scroll-path *::after {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}

/* kodza-guard 8bc520d851a4 — 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-scroll-path__svg):not(#_),
:where(.kodza-scroll-path__list):not(#_),
:where(.kodza-scroll-path__stop):not(#_),
:where(.kodza-scroll-path__note):not(#_) {
  transition-duration: revert;
  transition-delay: revert;
}

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

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

.kodza-scroll-path:not(#_),
.kodza-scroll-path__track:not(#_),
.kodza-scroll-path__ink:not(#_),
.kodza-scroll-path__pen:not(#_),
.kodza-scroll-path__marker:not(#_),
.kodza-scroll-path__body:not(#_),
.kodza-scroll-path__end:not(#_) {
  box-sizing: revert;
}

.kodza-scroll-path__svg:not(#_) {
  border: revert;
  margin: revert;
  padding: 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;
}

.kodza-scroll-path__list: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;
}

.kodza-scroll-path__stop:not(#_) {
  border: 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;
}

.kodza-scroll-path__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;
  color: revert;
  font-style: revert;
  text-underline-offset: revert;
  text-align: revert;
  text-indent: revert;
  text-shadow: revert;
  vertical-align: revert;
}

.kodza-scroll-path__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;
}

.kodza-scroll-path__cta:not(#_) {
  border: revert;
  margin: revert;
  list-style: revert;
  box-sizing: revert;
  float: revert;
  position: 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;
}

.kodza-scroll-path__note: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;
}

.kodza-scroll-path__svg:not(#_):where(:not([hidden])),
.kodza-scroll-path__title:not(#_):where(:not([hidden])),
.kodza-scroll-path__text:not(#_):where(:not([hidden])),
.kodza-scroll-path__note:not(#_):where(:not([hidden])) {
  display: revert;
}

.kodza-scroll-path__svg:not(#_):where([hidden]),
.kodza-scroll-path__title:not(#_):where([hidden]),
.kodza-scroll-path__text:not(#_):where([hidden]),
.kodza-scroll-path__note:not(#_):where([hidden]) {
  display: none;
}

.kodza-scroll-path__marker:not(#_)::before {
  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-scroll-path__svg:not(#_) {
  position: absolute;
}

.kodza-scroll-path__list:not(#_) {
  position: relative;
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
}

.kodza-scroll-path__stop:not(#_) {
  display: grid;
  margin: 0;
  padding: 0;
}

.kodza-scroll-path__title:not(#_) {
  margin: 0;
  font-family: var(--kz-font-display, inherit);
  font-size: calc(24px * var(--kz-font-display-scale, 1));
  font-weight: var(--kz-font-display-weight, 600);
  line-height: 1.1;
  letter-spacing: var(--kz-font-display-tracking, -0.03em);
  text-transform: var(--kz-font-display-case, inherit);
}

.kodza-scroll-path__text:not(#_) {
  max-width: 40ch;
  margin: 0;
  color: var(--kz-scroll-path-muted);
  font-size: 15px;
  line-height: 1.6;
}

.kodza-scroll-path__cta:not(#_) {
  display: inline-flex;
  padding: 0 28px;
  border-radius: var(--kz-radius-pill, 999px);
  background: var(--kz-scroll-path-ink);
  color: var(--kz-scroll-path-on-ink);
  font-family: var(--kz-font-label, inherit);
  font-size: var(--kz-font-label-size, 15px);
  font-weight: var(--kz-font-label-weight, 500);
  line-height: 1;
  letter-spacing: var(--kz-font-label-tracking, -0.01em);
  text-transform: var(--kz-font-label-case, revert);
  text-decoration: none;
  transition: transform calc(0.25s * var(--kz-motion-scale, 1)) var(--kz-scroll-path-ease);
}

.kodza-scroll-path__cta:focus-visible:not(#_) {
  outline: 2px solid var(--kz-scroll-path-ink);
  outline-offset: 3px;
}

.kodza-scroll-path__note:not(#_) {
  margin: 0;
  color: var(--kz-scroll-path-muted);
  font-family: var(--kz-font-label, var(--kz-font-mono, "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace));
  font-size: var(--kz-font-label-size, 12px);
  font-weight: var(--kz-font-label-weight, inherit);
  line-height: var(--kz-font-label-leading, 1.4);
  letter-spacing: var(--kz-font-label-tracking, inherit);
  text-transform: var(--kz-font-label-case, inherit);
}

.kodza-scroll-path__title:not(#_),
.kodza-scroll-path__text:not(#_) {
  transition: color calc(0.35s * var(--kz-motion-scale, 1)) ease,
    opacity calc(0.6s * var(--kz-motion-scale, 1)) ease,
    transform calc(0.8s * var(--kz-motion-scale, 1)) var(--kz-scroll-path-ease),
    clip-path calc(0.8s * var(--kz-motion-scale, 1)) var(--kz-scroll-path-ease);
}

.kodza-scroll-path__stop.is-seen .kodza-scroll-path__title:not(#_) {
  transition-delay: 0s, 0s, calc(0.08s * var(--kz-motion-scale, 1)), calc(0.08s * var(--kz-motion-scale, 1));
}

.kodza-scroll-path__stop.is-seen .kodza-scroll-path__text:not(#_) {
  transition-delay: 0s, calc(0.2s * var(--kz-motion-scale, 1)), calc(0.2s * var(--kz-motion-scale, 1)), 0s;
}

@media (prefers-reduced-motion: reduce) {
  .kodza-scroll-path *:where(svg, ol, li, h3, p, a):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 — Scroll Path
// Draws one line through the steps of a section, up to the reading point: down beside each
// step, across to the next one in an S, then a ring around the button. The route is measured
// from the real blocks and redrawn whenever they change size. Three attributes lay it out:
// data-path-stop on each block the line visits, data-path-marker on the point it passes
// through (without one, the middle of the block's top edge: the line then runs behind the
// block, so give it a background) and data-path-ring on the element it ends around (in the
// last stop). The figures you can tune are the constants below; the look is in the CSS.
(() => {
  const SELECTOR = '.kodza-scroll-path';
  const READ = 0.6; // the reading point, down the screen: the line is drawn up to it
  const GLIDE = 0.12; // how much of the way the ink catches up each frame (1 = sticks to the scroll)
  const SPEED = 1600; // px of line a second, at most: a flick of the wheel is drawn, not jumped
  const CURVE = 0.5; // how round the swing between two stops is (share of the gap they leave)
  const RING_GAP = 8; // px between the button and its ring
  const RING_TIME = 900; // ms to draw the ring once the line reaches the button
  const SAMPLE = 6; // px of line between two measured points
  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;
  };

  // One instance. Everything it starts is tied to `signal`, so kodza:destroy stops it all
  function mount(root, signal) {
    const pace = paceOf(root);
    // The still path: the whole line is drawn, every marker reached, the steps simply there.
    // The pace slows the pen and the ring (2 = half the speed)
    const still = reduceMotion || !pace;
    const stops = [...root.querySelectorAll('[data-path-stop]')];
    const svg = document.createElementNS(NS, 'svg');
    svg.setAttribute('class', 'kodza-scroll-path__svg');
    svg.setAttribute('aria-hidden', 'true');
    svg.setAttribute('focusable', 'false');
    const draw = (tag, className) => {
      const el = svg.appendChild(document.createElementNS(NS, tag));
      el.setAttribute('class', className);
      return el;
    };
    const track = draw('path', 'kodza-scroll-path__track');
    const ink = draw('path', 'kodza-scroll-path__ink');
    const pen = draw('circle', 'kodza-scroll-path__pen');
    pen.setAttribute('r', '4.5');
    root.prepend(svg);
    let route = null;
    let shown = 0;
    let ring = still ? 1 : 0;
    let frame = 0;
    let last = 0;

    // The reading point in the root's own pixels (a parent scaled by transform does not shift it).
    // Near the end of the page it slides to the bottom of the screen, so the last steps of a page
    // that cannot scroll them up to it are drawn too
    const reading = () => {
      const box = root.getBoundingClientRect();
      const left = document.documentElement.scrollHeight - scrollY - innerHeight;
      const end = Math.max(0, 1 - left / (innerHeight * (1 - READ)));
      return (innerHeight * (READ + (1 - READ) * end) - box.top) / (box.width / root.offsetWidth || 1);
    };

    const update = (now = performance.now()) => {
      frame = 0;
      if (signal.aborted || !route) return;
      const value = still ? route.line : route.lengthAt(reading());
      const dt = last ? Math.min(64, now - last) : 16;
      // The pen glides to the reading point, never faster than SPEED
      shown = still ? value : penStep(shown, value, dt, SPEED / pace, GLIDE);
      // The ring is played in time once the line reaches the button, and undone (a little faster)
      // when the reading point goes back above it
      const want = route.ring && shown >= route.line - 0.5 ? 1 : 0;
      if (!still && ring !== want) {
        const step = dt / (RING_TIME * pace);
        ring = want ? Math.min(1, ring + step) : Math.max(0, ring - step * 1.5);
      }
      const drawn = shown + inOut(ring) * route.ring;
      inkTo(ink, drawn, route.total);
      const tip = ink.getPointAtLength(drawn);
      pen.setAttribute('cx', tip.x.toFixed(1));
      pen.setAttribute('cy', tip.y.toFixed(1));
      pen.classList.toggle('is-away', still || drawn < 1 || ring === 1);
      const done = ring === 1 || (!route.ring && shown >= route.line - 0.5);
      stops.forEach((stop, i) => stop.classList.toggle('is-reached', i === stops.length - 1 && route.ring ? done : shown >= Math.max(route.marks[i] - 1, 0.5)));
      root.classList.toggle('is-complete', done);
      const moving = !still && (shown !== value || ring !== want);
      last = moving ? now : 0;
      if (moving) frame = requestAnimationFrame(update);
    };
    const schedule = () => (frame ||= requestAnimationFrame(update));

    // Measured again whenever a step changes size: the drawn line snaps to its new length
    const remeasure = () => {
      route = measure(root, stops, svg, track, ink);
      if (route && !still) shown = route.lengthAt(reading());
      schedule();
    };
    const ro = new ResizeObserver(remeasure);
    [root, ...stops, ...root.querySelectorAll('[data-path-ring]')].forEach((el) => ro.observe(el));
    signal.addEventListener('abort', () => {
      ro.disconnect();
      cancelAnimationFrame(frame);
    });

    if (!still && 'IntersectionObserver' in window) {
      const io = new IntersectionObserver((entries) => entries.forEach((entry) => {
        if (!entry.isIntersecting) return;
        entry.target.classList.add('is-seen');
        io.unobserve(entry.target);
      }), { rootMargin: '0px 0px -10% 0px' });
      stops.forEach((stop) => io.observe(stop));
      signal.addEventListener('abort', () => io.disconnect());
      window.addEventListener('scroll', schedule, { passive: true, signal });
    } else stops.forEach((stop) => stop.classList.add('is-seen'));
    window.addEventListener('resize', schedule, { signal });
    route = measure(root, stops, svg, track, ink);
    if (route) shown = still ? route.line : route.lengthAt(reading());
    update();
  }

  // The route engine: where each stop is, the line through them, and how far along the line a
  // given height is (the line only ever goes down, so a height gives one length)
  function measure(root, stops, svg, track, ink) {
    const local = boxesIn(root);
    svg.setAttribute('width', root.offsetWidth);
    svg.setAttribute('height', root.offsetHeight);
    if (!stops.length) return null;
    const ringEl = stops[stops.length - 1].querySelector('[data-path-ring]') || (stops[stops.length - 1].matches('[data-path-ring]') ? stops[stops.length - 1] : null);
    let d = '';
    let ringD = '';
    let from = null;
    const anchors = stops.map((stop, i) => {
      const s = local(stop);
      const marker = stop.querySelector('[data-path-marker]');
      let point;
      if (i === stops.length - 1 && ringEl) {
        // The ring: the outline of the button, RING_GAP out, with its own corners (read, not assumed)
        const r = local(ringEl);
        const [L, T, R, B] = [r.x - RING_GAP, r.y - RING_GAP, r.x + r.w + RING_GAP, r.y + r.h + RING_GAP];
        const radius = parseFloat(getComputedStyle(ringEl).borderTopLeftRadius) || 0;
        const c = radius ? Math.min((B - T) / 2, (R - L) / 2, radius + RING_GAP) : 0;
        const x = (L + R) / 2;
        point = { x, y: T, top: T };
        ringD = ` H${R - c} A${c},${c} 0 0 1 ${R},${T + c} V${B - c} A${c},${c} 0 0 1 ${R - c},${B}`
          + ` H${L + c} A${c},${c} 0 0 1 ${L},${B - c} V${T + c} A${c},${c} 0 0 1 ${L + c},${T} H${x}`;
      } else if (marker) {
        const m = local(marker);
        point = { x: m.x + m.w / 2, y: m.y + m.h / 2, top: Math.min(s.y, m.y + m.h / 2) };
      } else point = { x: s.x + s.w / 2, y: s.y, top: s.y };
      if (!from) d = `M${point.x},${point.y}`;
      else {
        // An S with upright ends, across the gap the two stops leave
        const k = Math.max(0, point.top - from.y) * CURVE;
        d += ` C${from.x},${from.y + k} ${point.x},${point.top - k} ${point.x},${point.top}`;
        if (point.y > point.top) d += ` V${point.y}`;
      }
      // Down beside the stop, to its bottom edge, where the next swing starts
      if (i < stops.length - 1) {
        const bottom = Math.max(point.y, s.y + s.h);
        d += ` V${bottom}`;
        from = { x: point.x, y: bottom };
      }
      return point;
    });
    ink.setAttribute('d', d);
    const line = ink.getTotalLength();
    track.setAttribute('d', d + ringD);
    ink.setAttribute('d', d + ringD);
    const total = ink.getTotalLength();
    // The height of the line every SAMPLE px, kept rising
    const count = Math.max(1, Math.ceil(line / SAMPLE));
    const ys = [];
    for (let i = 0; i <= count; i += 1) ys.push(Math.max(ys[i - 1] ?? -Infinity, ink.getPointAtLength((line * i) / count).y));
    const lengthAt = (y) => {
      if (y <= ys[0]) return 0;
      if (y >= ys[count]) return line;
      let lo = 0;
      let hi = count;
      while (hi - lo > 1) {
        const mid = (lo + hi) >> 1;
        if (ys[mid] <= y) lo = mid;
        else hi = mid;
      }
      const span = ys[hi] - ys[lo];
      return ((lo + (span ? (y - ys[lo]) / span : 0)) * line) / count;
    };
    return { line, total, ring: total - line, lengthAt, marks: anchors.map((point) => lengthAt(point.y)) };
  }

  // ---------- Pen engine: the same block in Scroll Path, Path Draw and Annotation Arrow ----------
  // Boxes measured in a root's own pixels, a line inked by its length (stroke-dasharray: the `d`
  // of a path is never animated, Safari would not play it) and a pen that moves along it at a
  // steady speed. Nothing in it knows the component around it
  const NS = 'http://www.w3.org/2000/svg';
  const inOut = (t) => (t < 0.5 ? 4 * t * t * t : 1 - (-2 * t + 2) ** 3 / 2);
  // Where an element sits in `root`, in the root's own pixels: a parent scaled by transform (a
  // thumbnail, a theme) does not shift the drawing
  const boxesIn = (root) => {
    const box = root.getBoundingClientRect();
    const scale = box.width / root.offsetWidth || 1;
    return (el) => {
      const r = el.getBoundingClientRect();
      return { x: (r.left - box.left) / scale, y: (r.top - box.top) / scale, w: r.width / scale, h: r.height / scale };
    };
  };
  // Inks a shape up to `length` px along its outline (`total` px long)
  const inkTo = (el, length, total) => {
    el.style.strokeDasharray = `${length.toFixed(1)} ${Math.ceil(total + 2)}`;
    el.style.visibility = length > 0.5 ? '' : 'hidden';
  };
  // One frame of the pen (`dt` ms): from `shown` towards `target`, at most `speed` px a second,
  // a little faster when it lifts the ink off. `glide` eases it in (1: a steady speed)
  const penStep = (shown, target, dt, speed, glide = 1) => {
    const cap = ((speed * dt) / 1000) * (target < shown ? 1.5 : 1);
    const next = shown + Math.sign(target - shown) * Math.min(Math.abs(target - shown) * glide, cap);
    return Math.abs(target - next) < 0.5 ? target : next;
  };
  // ---------- End of the pen engine ----------

  // 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).