BMW M4 G82 Performance Poster

Create an ultra-high-resolution vertical social media poster in a 4:5 aspect ratio, with clarity suitable for 8K print quality. Use the {argument name="car model" default="BMW car"} from the reference image as the main subject, and retain the background structure and composition of the reference image while transforming it into a BMW-themed design. Replace all black tones with a flat {argument name="background color" default="high-saturation BMW blue"} background. Maintain the same layout, spacing, visual balance, and poster composition as the reference image. The background should use a smooth gradient transitioning from light electric blue at the top to deep navy blue at the bottom. Add subtle grain texture at 2% to 3% and faint rectangular overlays at 2% to 4% opacity. Keep the design clean, graphic, premium, and non-photorealistic. Add a soft contact shadow beneath the car. Use the same BMW from the reference image, changing only the {argument name="paint finish" default="matte frozen blue"} or deep metallic navy-blue paint finish. Preserve the original body shape, wheels, stance, and design details from the reference image. Display the car from a rear three-quarter 45-degree view that exactly matches the reference image angle. Use a slightly elevated camera angle. Position the car slightly right of center. Include a visible carbon-fiber roof, aggressive rear diffuser, crisp controlled reflections, and detailed brake components. Maintain exactly the same composition as the reference image: top: brand logo; middle: oversized typography; center: car overlapping with text; bottom: editorial section and specifications. Typography: Main title: "BMW", using an ultra-condensed bold sans-serif font, vertically stretched to match the reference poster. Color should be deep navy blue or near-black. Static text with no distortion. Use it as a structural background element. Subtitle: "BMW M4 G82", using a thin font with wide letter spacing. Logo area: Center the BMW roundel at the top. Editorial section: Title: "BMW — Where Driving Becomes Instinct"; body copy focused on driver connection, handling, performance, and precision. Use the same boxed editorial layout as the reference. Background faded text: "M4", displayed at a large scale with 3% to 5% opacity behind the text box. Lower left: "M4 G82"; lower right specifications: 405 kW / 550 PS, 3.4 s, 307 km/h. Use clean studio lighting with sharp but controlled highlights. Color grading should use deep blue tones, high contrast, and clean blacks. Camera lens: 50mm, slightly elevated rear three-quarter angle. Atmosphere: performance, precision, driver-focused. Add a bottom-right watermark: harboriis, accompanied by a small x and Instagram icon.