Mid-Century 1960s Travel Illustration

Mid-century travel-ad illustration featuring {argument name="humans" default="a couple"} riding {argument name="vehicle" default="a vintage vespa"}, accompanied by {argument name="animal" default="a small dog"}. Dress them in [CLOTHING] using [PALETTE]. Place the scene in [SCENERY], with lush stylized foliage framing the figures and vehicle. Render with flat gouache-like color shapes, visible dry-brush strokes, simplified facial features, crisp graphic silhouettes, hand-painted texture, decorative botanical forms, and warm sunlit color harmony. Keep the composition elegant, cheerful, fashion-forward, and distinctly 1960s European advertising. Aspect ratio 4:5.