Mobile App Developer Neon Promo Cover

[Format] Landscape 16:9 gig cover, dark neon-lime tech promo with a cut-out portrait and a large phone mockup. Glossy, high-contrast finish. No watermark, no personal names. [Layout] Full-bleed near-black field with lime-green diagonal glow shards and a dotted pixel patch in the upper centre. A slim top bar spans the upper-left area with the Flutter mark, a thin divider and the Google Partner emblem. Below it a two-line headline lockup is left-aligned, then a full-width lime keyword bar, then a row of three outlined benefit chips, then a row of two outlined rounded-pill buttons. A large upright phone mockup fills the right third, tilted slightly and overlapping the person. A lime satisfaction chip sits over the lower-right corner. [Subject] A man in his thirties with a short beard, plain navy button-down shirt with rolled sleeves, arms folded, chest-up, neutral confident gaze to camera. He occupies the middle-right 30 percent of the frame, standing just left of the phone mockup. [Headline] Upper left, a small chevron mark then two stacked words in bold sans (placeholder copy). Headline: MOBILE APP in extra-heavy condensed uppercase sans, bright lime, very large, on the first line; DEVELOPER in the same face and weight in pure white on the second line. Under it, a full-width lime bar carries a tracked line of platform keywords in bold italic uppercase sans, dark navy. Benefit chips in a row read HIGH PERFORMANCE, SECURE & SCALABLE and FAST DELIVERY in bold uppercase sans, white, each with a small lime glyph on its left. Buttons read LET'S BUILD with a small chevron, and FREE CONSULTATION with a small video glyph. Lower-right chip: 100% CLIENT SATISFACTION in bold uppercase sans, dark navy, on a lime plate. [Badges] The top bar carries two platform marks: the Flutter mark as a blue-and-cyan angular chevron beside the word Flutter, a thin vertical divider, then the Google Partner mark in the Google colours with the words Google Partner in white. A small lime shield glyph appears on each chip. [Mood] Palette of near-black, electric lime, cyan and white. Sharp, modern and high-trust; the lime headline and lime keyword bar cut through the dark field at thumbnail size.