Prompt 1 (Corporate Stationery Mockup): Minimalist luxury corporate branding mockup for "OPHYR". A premium linen-textured white paper letterhead and dark charcoal envelope on a modern stone table. Featuring a blocky, solid, high-fashion logo inspired by Chanel typography. Modern geometric inverted triangle mark with a turquoise horizontal line intersecting through the center. Clean layout, charcoal gray text, turquoise accent rules, elegant studio lighting, photo realistic, 8k resolution.