Using the uploaded product photo, generate a high-resolution mockup with these exact specifications: [COMPOSITION]: The product resting on a single, large, smooth dark river stone. [LIGHTING]: Soft, diffused morning light, creating very gentle highlights on the glass bottle. [BACKGROUND]: A solid, neutral light-gray matte background (#D3D3D3). [SHADOW]: A subtle contact shadow between the bottle and the stone. [PRODUCT INTEGRITY]: STRICTLY PRESERVE the product's original surface. DO NOT add any new text, logos, or branding. [MOOD]: Zen, minimalist, premium organic.