Create a sophisticated 1970s-inspired black-and-white line drawing of a joyful dog riding a happy horse, designed for upscale, vintage-style packaging. The illustration should blend classic equestrian elegance with playful charmāthink Ralph Steadmanās expressive strokes meets mid-century travel poster art. Both animals should radiate exuberance: the horse in a spirited trot (head high, mane flowing), and the dog perched confidently, ears flapping with delight. Use bold, clean linework with subtle Art Nouveau or psychedelic touches (e.g., swirling mane details, geometric sun rays). Keep shading minimal, contrast high, and include ample negative space for text (e.g., āTrail Buddy Equine Snacksā). Balance refinement with warmthāwhimsical but not childish, nostalgic yet timeless. Ver mais