Case C-260/24, Lukoil Bulgaria: Judgment of the Court (Third Chamber) of 18 December 2025 (request for a preliminary ruling from the Administrativen sad Sofia-oblast – Bulgaria) – Lukoil Bulgaria EOOD v Komisia za zashtita na konkurentsiata (Reference for a preliminary ruling – Competition – Article 102 TFEU – Abuse of a dominant position – Wholesale market for fuel in Bulgaria – Margin squeeze on competitors – Product market definition – Vertically divided market – Taking into account the excise duty regime)