1. What is a cookie?
Cookies are small data files that can be stored on the device for the operation of the website, session maintenance, remembering preferences, security, and, if permitted, analysis/marketing purposes.
2. Cookie categories
- Strictly necessary cookies: Required for the technical operation of the service requested by the user, such as login, security, language preference, and cart/payment flow.
- Functional cookies: Provide longer-term retention of preferences or additional personalization; consent may be required depending on their usage.
- Analytical/performance cookies: Generate traffic and usage statistics. They are not operated without user consent.
- Marketing cookies: Used for advertising, retargeting, or campaign measurement; require the necessary legal basis and generally prior consent.
3. Cookie table
- PHPSESSID — Provider: Fibonacci Math; Purpose: Maintenance of session, login and form security (CSRF protection); Category: Strictly necessary; Duration: Until the end of the browser session; Legal basis: Performance of contract / technical necessity
- FMADMIN — Provider: Fibonacci Math; Purpose: Admin panel session (authorized administrators only); Category: Strictly necessary; Duration: Until the end of the browser session; Legal basis: Legitimate interest / security
- fa_consent — Provider: Fibonacci Math; Purpose: Remembering your cookie preference (acceptance/rejection); Category: Strictly necessary; Duration: 180 days; Legal basis: Legal obligation / legitimate interest
- site_lang — Provider: Fibonacci Math; Purpose: Remembering language preference; Category: Functional; Duration: 1 year; Legal basis: Provision of the service requested by the user
- site_lang_auto — Provider: Fibonacci Math; Purpose: Remembering whether the language was selected automatically; Category: Functional; Duration: 1 year; Legal basis: Provision of the service requested by the user
- mo_everify_hide — Provider: Fibonacci Math; Purpose: Hiding the email verification reminder; Category: Functional; Duration: 7 days; Legal basis: Provision of the service requested by the user
- fa_vid — Provider: Fibonacci Math (our own server); Purpose: Browser ID for visit statistics; Category: Analytical; Duration: 1 year; Legal basis: Explicit consent (only if "Accept" is selected)
- fa_sid — Provider: Fibonacci Math (our own server); Purpose: Session ID for visit statistics; Category: Analytical; Duration: 30 minutes; Legal basis: Explicit consent (only if "Accept" is selected)
The Platform does not use marketing or advertising cookies, nor third-party tracking cookies.
4. Management of preferences
The user can manage non-mandatory cookies at any time via the "Accept" and "Reject" options in the cookie notice and the "Change cookie preferences" link at the bottom of the page. Non-mandatory cookies are not placed without obtaining consent; analytical cookies are deleted when consent is withdrawn.



































