Art style: Children's Book.
Full-length view, the entire figure visible from head to hooves, standing upright and squarely on all four legs — Maximus, a powerful noble white stallion with the alert manner of a bloodhound tracker. Broad muscular chest, strong arched neck, tall proportions, glossy pure-white coat, flowing silky white mane and long tail. Expressive dark brown eyes set in a stern, deeply serious, faintly suspicious expression, ears pricked forward, nostrils flared as if catching a scent, muzzle lowered slightly in tracking mode. Sturdy strong legs ending in polished dark hooves planted firmly on flagstone. Wears a simple royal-guard leather bridle with brass buckles; balanced across his back sits a fancy tiered birthday cake on a wooden tray he is proudly delivering. Setting: a sunlit cobbled courtyard beside a tall stone tower, green hills behind.
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FINAL STYLE ENFORCEMENT (this is the authoritative rendering directive — it overrides any style wording elsewhere in the prompt):
Render this image entirely in "Children's Book" style. Match the lighting grammar, material response, colour science, level of realism / stylisation, line weight, and shading model typical of "Children's Book". Keep the subject, composition, camera angle, lighting direction, and colour palette from the description above — but EVERY surface, skin, fabric, material, and environmental element must be rendered in the "Children's Book" idiom, not in any other medium.
