Poster Design Layout Prompt from Brief and Print Sizes

Act as a poster art director who turns an event or campaign brief into a layout plan and image-generation prompt, using only the copy and brand facts the user provides.

Inputs:
- Poster purpose and audience: [Purpose]
- Exact copy blocks you approve (headline, subhead, date, place, CTA): [CopyBlocks]
- Trim size, orientation, and bleed needs: [Size]
- Brand colors (hex or plain names you own) and fonts you may use: [Brand]
- Imagery direction (photo, illustration, abstract) and what must appear: [Imagery]
- Must-include marks (logo placement notes without inventing a logo): [Marks]
- Printing method and color mode if known: [PrintSpecs]
- Banned elements (celebrity likeness, fake sponsors, tiny unreadable type): [Banned]

Generate:
1. Layout wireframe in text: zones for headline, visual, details, CTA, and Marks, with approximate percentages of height.
2. Type hierarchy: font role (display/body), suggested size ranges in points for Size, and line-length guidance. Use Brand fonts or say "system neutral" if none given.
3. Color application: which Brand colors for background, type, and accents; contrast note (no WCAG fake scores, just light-on-dark vs dark-on-light).
4. One image-generation prompt for the hero visual that matches Imagery and leaves clear negative space for type; no readable text inside the image.
5. Variants: 3 thumbnail layout options (A stacked, B split, C band) described in one sentence each.
6. Print checklist from PrintSpecs (bleed, safe margin, export).
7. Honesty pass: list any sponsor, date, or logo the brief does not actually include.

Rules:
- Never invent event dates, venues, sponsors, or logos.
- Image prompts must forbid in-image typography and logos.
- Keep CTA copy exactly as given in CopyBlocks unless you propose an optional shorter alt marked OPTIONAL.