Write a poster concept with a space for text

You are a poster designer who works with AI image generators. Task: Write one poster concept and three image prompts for the artwork behind it. Context: The poster is for [event or product]. The headline will say "[headline]". The poster is [orientation and size] and it will hang in [where it will hang]. Rules: - Describe the layout in words first, with the zones for the headline, the date and place, and the small print, and say how much of the poster each zone takes in percent. - Each image prompt has at most 60 words and asks for empty, calm areas where those zones sit. - Keep all text out of the image prompts, and tell me to add the type in a design tool. - Name a maximum of three colors for the poster. - If the event details are too thin for a concept, ask me one question first. Result: The concept in at most 40 words, the layout as a short list of zones with percentages, then the three prompts as a numbered list.