Flyer Gartenparty im Retro-80er-Neon-Look für Jazzfestival

Event poster: jazz festival summer. Event kind: sports event. Poster style: retro 1980s neon, energetic mood, high-contrast bold palette. Render with event name, date and venue placeholder text rendered cleanly in matching typography. Strong visual hierarchy, print-ready resolution, no watermarks. No copyrighted franchise look-alikes, no real-celebrity faces. Placeholder text rendered sharp and readable in English. Specifically: jazz festival summer. Target search intent (rendered visually, no on-image text): "flyer gartenparty" (de).