Papier firmowy premium w klasycznym stylu korporacyjnym

Print-ready letterhead template for "Papier Firmowy" (professional services). Company brief: a clean, trustworthy corporate identity concept showcasing a polished business stationery layout for a generic company, with elegant hierarchy and practical spacing for formal correspondence. Style: classic corporate, navy + cream classic palette; photorealistic top-down mockup of an A4 portrait sheet featuring a header band with placeholder logo and company name, a subtle logo mark watermark, and a footer strip with placeholder address, phone, email, website, and registration number. Generous central text area for body copy, crisp print-ready composition, realistic paper texture, studio lighting, no real logos, no extra watermarks other than the chosen design.