Use the uploaded image as the main design reference. Do not invent a new layout, color palette, typography system, or shape language — follow the upload exactly.

Generate a vertical portrait social media promotion banner design in 9:16 aspect ratio, 1080 × 1920 px composition. The final output must be a fully composited flat banner image — all zones, background colors, typography, graphic shapes, decorative elements, and the product subject must appear together in one single flat image. The transparency checkerboard (alpha channel) must not be visible anywhere in the final output. Every pixel of the 1080 × 1920 px canvas must be filled with the banner design. Do not output a standalone transparent cutout or isolated subject.

ZONE LOCK — THIS IS A HARD BOUNDARY: The left vertical typography strip occupies exactly 40% of the canvas width (432px at 1080px canvas). The right headline/content zone occupies exactly 60% of the canvas width (648px), spanning from 40% to 100% from the left (432px–1080px). The central product cutout overlaps both zones. The generator must not redistribute these zone proportions under any circumstance.

Layout: dark green vertical rounded rectangle left panel occupying 0%–40% width and 0%–100% height with soft right edge rounding. Oversized vertical "COLTACHE" typography running bottom-to-top along the left panel from approximately 3%–38% width and 10%–95% canvas height. Small script "iced" at approximately 3%–16% width and 86%–92% canvas height. Right headline zone: "THE BEST / IS HERE / AT KCoffee" at 43%–97% width and 5%–28% canvas height (96px–538px). Offer text block at 43%–90% width and 29%–38% canvas height (557px–730px). Central iced coffee glass composited overlapping both zones at 8%–82% width (86px–886px) and 38%–88% canvas height (730px–1690px). Cream coffee splash lower-right at 42%–88% width and 82%–96% canvas height (1574px–1843px). Brand badge bottom-right at 52%–97% width (562px–1048px) and 88%–97% canvas height (1690px–1862px). Scattered coffee bean accents and blurred fruit/food accents distributed across the canvas edges. Reading order: "THE BEST IS HERE AT KCoffee" → iced coffee glass → "COLTACHE" vertical text → offer text → brand badge.

Background & color blocking: the left 40% of canvas is a dark deep forest green rounded rectangle panel #1A3A10 — slightly darker than the right background, with a soft rounded right edge (approximately 40px radius on the right corners only), filling the full canvas height. The right 60% of canvas is a slightly lighter saturated forest green #2A5A1A with a soft radial gradient brightening at the centre-right area approximately 60%–90% width and 30%–70% height — the bright centre is vivid green #3A7A20 fading to deeper forest green #2A5A1A at the edges. No diagonal panels, no horizontal bands, no flat yellow zones.

Graphic shapes: dark forest green left vertical panel with rounded right edge. Cream-coloured coffee liquid splash #E8D8A0 at the lower-right with flowing organic tendrils and droplets, including a roasted coffee bean accent. Soft blurred green fruit accents cropped into the upper-left and upper-right corners. Multiple roasted coffee bean silhouettes at varying sizes and blur levels distributed across the composition. Brand badge bottom-right as described below.

Typography: oversized vertical text reads exactly "COLTACHE" — ultra-bold uppercase condensed sans-serif, pale cream-yellow #E8DCA0, rotated 90 degrees counterclockwise so it reads from bottom to top, dramatically cropped by the canvas edges. Small script reads exactly "iced" — handwritten italic script in pale cream #E8DCA0. Main headline reads exactly:

"THE BEST"

"IS HERE"

"AT KCoffee"

All in large bold uppercase sans-serif, pale cream-yellow #E8DCA0, with "Coffee" using a slightly softer brand-style treatment. Offer text reads exactly:

"GRAND GELATO PISTACHE 45 PETOT"

"PETIT GELATO PISTACHE FOR"

"39 PETOT"

Set in compact uppercase sans-serif, pale cream #E8DCA0, centred within the right content zone. Brand badge text: "KCoffee" in bold rounded display lettering with "marklee@" beneath in smaller pale cream text.

CTA button: none — do not add one.

Badge/promo tag: rounded dark forest-green badge positioned bottom-right containing the "KCoffee" and "marklee@" branding only. No sale or discount badge.

Iconography/contact strip: none — do not add social icons, phone number, email, website, or contact strip.

Logo: no separate logo. The bottom-right brand badge serves as the only branding element.

Photo/image subject: Condition B applied — iced coffee glass and surrounding props composited directly into the banner.

SUBJECT CONTAINMENT LOCK: The primary iced coffee glass occupies approximately 58% of canvas width (626px) and 46% of canvas height (883px). Glass left edge anchored at 10% from canvas left (108px). Glass right edge anchored at 72% from canvas left (778px). Glass top edge anchored at 40% from canvas top (768px). Glass base anchored at 86% from canvas top (1651px). The glass overlaps both the left typography panel and the right content zone. Total subject spread including surrounding props spans from 8%–82% canvas width and 38%–88% canvas height.

The product subject is a chilled iced coffee served in a clear rocks glass with visible condensation droplets. The drink features a dramatic layered appearance with a deep espresso base, swirling caramel-beige milk mixing naturally through the centre, visible ice cubes near the top, and a light dusting of cocoa or coffee powder on the surface. A polished silver reusable metal straw extends upward at a slight angle. Strong upper-right lighting creates crisp highlights on the glass, condensation, straw, and creamy swirls. The lower-right features a dynamic cream splash with scattered droplets and coffee beans integrated into the scene. The glass is composited directly into the banner with no cutout border.

Render at maximum graphic-design quality pixel-accurate to the reference. The complete 1080 × 1920 px canvas must be fully filled with no transparency, checkerboard, or alpha channel visible. The oversized vertical "COLTACHE" typography must dominate the left panel with dramatic cropping. The tonal separation between the dark left panel and lighter right background must remain subtle but clear. The condensation droplets, layered coffee, swirling cream, and liquid splash should appear highly photorealistic. Coffee bean accents should vary naturally in size, blur, and depth. No warped text, no paraphrased copy, no invented decorative elements beyond those described, no watermark, no zone boundary violations, and no transparency artifacts.