# Cookies and browser storage

## 1. The short version

This website does not install advertising or analytics trackers. Content, local search, documentation, and the educational download remain available when you choose Essential only. Self-hosted illustrations do not embed YouTube, social pixels, or remote advertising players. Ordinary hosting requests still disclose network information needed to deliver files, as explained in the Privacy notice.

## 2. Application storage inventory

The application uses localStorage, not a JavaScript-set cookie, for two narrowly scoped purposes. Local storage remains on the browser and origin where you make the choice; it is not automatically shared between devices or between a preview hostname and the final domain.

| Key | Purpose | Duration | Choice |
| --- | --- | --- | --- |
| `p21-privacy-v1` | Version, essential-only or display-preference choice, and expiry time; no visitor ID | Up to 180 days, enforced when next read | Records the choice you make |
| `p21-motion` | Whether you explicitly turned motion on or off | Cleared on withdrawal, reset, or permission expiry | Written only with display-preference permission |

Language is represented by the URL. Search text is processed locally and is not persisted by the application. We do not maintain an advertising profile or a browser identifier for analytics.

## 3. Essential hosting technologies

The hosting platform may use essential delivery or security technologies when a protection feature is invoked. A provider-generated security cookie is different from the application keys listed above. Its exact presence depends on the request and hosting configuration. The site does not label optional analytics as essential or claim that hosting produces no logs. External websites have separate cookies and policies when you follow their links.

## 4. Your controls

Choose Essential only to leave optional persistent preferences off. Choose Remember preferences to permit the browser to retain a motion choice. Settings lets you review the inventory and change your selection; its display-preference switch is off by default. Analytics and advertising are identified as not installed, not presented as working services you must accept.

Preferences in the footer reopen the controls on every page. Saving Essential only removes the saved motion setting. Forget my saved choices removes the application records and displays the notice again. Your current page remains usable. You can also clear site data or block storage in your browser. When storage is unavailable, the selection applies only to the current page.

## 5. Motion and accessibility

Device reduced-motion settings take priority. The Reduce motion option in Preferences provides static illustrations without requiring storage permission. Otherwise muted illustrations loop while visible, and the process graphic follows scrolling before resuming playback. Media pause outside the viewport or while the tab is hidden. Visuals convey no exclusive information. Language selection, scrolling, and closing a dialog do not signify consent.

## 6. Future changes and contact

This version does not enable analytics or advertising tracking. Future versions may use cookies, pixels, analytics identifiers, SDKs, and server-side metrics to measure visits, referrals, resource retrieval, and agent interactions. The actual inventory, providers, purposes, durations, and choices will be disclosed before activation; prior consent will be requested for non-exempt tracking where required. Essential delivery and abuse prevention remain distinct from optional measurement.

No current choice grants blanket permission for those additions. Accepting display storage, scrolling, or retrieving resources through an agent is not acceptance of unrelated tracking. Server-to-server agents may not execute JavaScript or retain cookies: any future API-specific notice and authorization must be delivered independently of this browser banner. A resource request can still appear in delivery/security logs. Contact the business contact on this page with questions.


## Business contact

Privacy contact: Agent@proof21.xyz

Proof21 LLC operates this website. Privacy, terms, security, and general website questions may be sent to Agent@proof21.xyz.