Editorial Riyad Mahrez Sports Poster

Goal: Create a premium vertical sports poster design for {argument name="athlete name" default="Riyad Mahrez"}, styled like an Adidas football campaign, with a bold editorial collage aesthetic. Canvas: Vertical poster, 2:3 aspect ratio, clean white background with high-contrast black, grey, and red graphics. Use a polished commercial sports-design look with sharp typography, grain texture, and layered depth. Layout: Center a full-body male footballer walking forward, slightly left of center, wearing an all-black casual athletic outfit: black bomber jacket, black polo shirt, black slim trousers, and white sneakers. His pose is relaxed and confident, one hand in pocket, studio-lit with soft shadows on the floor. Behind him, place a giant black-and-white cropped portrait silhouette of the same athlete’s head filling most of the background. Overlay very large vertical uppercase typography reading {argument name="main vertical word" default="MAHREZ"} along the left side, partially transparent and integrated over the background portrait. Add the small vertical text {argument name="side name text" default="RIYAD"} near the upper-left edge. On the right side, include one large red geometric shape: a tilted red block/circle-like form with a wide white diagonal stripe, partially cropped off the bottom-right corner. Add one small red diamond shape near the top-right corner. Text content: Include exactly 5 distinct text/logo elements: 1) the huge vertical word “MAHREZ” on the left, 2) the small vertical word “RIYAD” at upper left, 3) a red handwritten signature reading {argument name="signature text" default="Mahrez"} with the number “26” beneath it near the lower left, 4) small uppercase caption text reading “RIYAD MAHREZ / ALGERIA NATIONAL TEAM / WINGER” below the signature, and 5) a black Adidas logo at the bottom-left corner. Visual style: Modern sports poster design, monochrome photography mixed with bold red accent shapes, gritty halftone/grain texture, strong contrast, clean negative space, luxury brand campaign feel, editorial magazine composition, crisp sans-serif typography, realistic athlete photo treatment. Constraints: Use exactly 2 red geometric shapes, exactly 1 full-body athlete, exactly 1 giant background portrait silhouette, exactly 5 text/logo elements as listed, no extra athletes, no extra logos, no watermark, no border, and keep the face realistic unless intentionally obscured by a subtle rectangular graphic overlay.