Editorial product photo prompt

FORMAT: 1:1 square product photograph, full bleed SUBJECT: matte black ceramic mug, exactly as in the attached photo: same shape, proportions, colors, materials and labels LAYOUT: floating slightly above a plinth, hard cast shadow to the right, lower third of frame TYPOGRAPHY: none, no text anywhere in the image COLOR: dominant warm grey, accent black, neutral cream LIGHT: single hard key from upper left, no fill; 100 mm at f/8, focus on the product, crisp detail throughout SURFACE: textured plaster backdrop MOOD: quiet, premium, editorial RULES: no watermark, no logo, no signature, no border, text spelled exactly as given AVOID: no plastic skin, no over-retouching, no CGI look, no waxy faces, no distorted hands, no text, no watermark