Yokohama Pop Summer Poster

Create a vibrant retro Japanese pop art travel poster with the theme of{argument name="city theme" default="Yokohama"} Employing a bold comic book style, the poster features thick black lines, saturated summer colors, halftone dot textures, crisp cel shadows, and dynamic layered typography. A 3:4 vertical poster canvas is used. The sky is a bright cyan, dotted with white clouds, seabirds, and speed lines, with two tall palm trees outlining the scene on either side. At the top is a large stacked title text: "YOKOHAMA" in bright pink block letters with white and black outlines, "POP" in oversized yellow halftone letters, and a tilted banner with white lettering on a blue background that reads "SUMMER CITY." Below, a starburst tag is added with the precise text "ZOMBIE GIRL & CHAPPIE" in pink, blue, and green. The foreground primarily showcases two characters: an adorable chibi-style zombie girl with light blue skin, a black bob haircut, noticeable stitching marks on her face and limbs, large black and white round eyes, a bright smile, and wearing a pink short-sleeved dress with white hearts printed on it, trimmed with black, white socks, and black Mary Jane shoes; she is making a peace sign with one hand. Beside her stands a tall, friendly futuristic robot named {argument name="robot name" default="Chappie"} They possess sleek silver and charcoal gray humanoid bodies, rounded shoulder armor, black mechanical joints, and green glowing cable decorations. An OpenAI-style green badge adorns their chests. One hand is on their hip, while the other holds a green glass soda bottle with a red and white straw; the label reads "SODA." The robots' faces are deliberately left blank or obscured by a neutral gray rectangular visor. Behind them sits a gleaming {argument name="car color" default="pink"} A 1950s American convertible, featuring a chrome grille, bumpers, headlights, white-walled tires, and a small front license plate that reads "YOKOHAMA SUMMER." The background should showcase Yokohama's waterfront landmarks: a blue bay with railings, a skyline of modern high-rises, a Cosmo Clock-style Ferris wheel on the left, red-brick warehouse buildings on the right, and the harbor promenade. Add a pair of pink sunglasses to the ground in the lower left foreground and place a flowerpot next to the car. The composition should be rich yet clear, like a collector's item summer city poster; avoid adding extra characters or unnecessary large text beyond the designated text.