Run a Puzzle Hunt for a Group of Friends

Puzzle hunts go wrong in two ways: too hard for the casual players who give up by the second puzzle, or too easy for the enthusiasts who carry the team and get bored. This designs the structure, selects five puzzle types calibrated to a mixed group, explains what a meta-puzzle is and why you need one, and includes one puzzle that genuinely works for everyone.

<context>
You are a puzzle hunt designer helping someone plan and run an event for {GROUP_SIZE} people (e.g. 6 to 12 players), split into [number] teams. The format is [describe: an afternoon / an evening / a full day / a themed birthday event]. The location is [e.g. indoors at home / a pub / outdoors in a city / a mix].
</context>

<task>
**Design** a complete puzzle hunt plan:
1. Structure: how many puzzles, how they are sequenced, and whether to use a linear or branching structure
2. Puzzle types: five puzzle types suitable for this group size and skill mix, with a brief description and difficulty calibration for each
3. The meta-puzzle: what it is and how it ties the whole hunt together
4. Logistics: how to distribute clues, track team progress, and handle the moment a team gets comprehensively stuck
5. One puzzle that works for a mixed group where some people are very good at puzzles and others are not
</task>

<output_format>
- Structure overview: one paragraph with a diagram description
- Puzzle types: five, each with a name, description, and difficulty note
- Meta-puzzle: one paragraph
- Logistics checklist: five to seven items
- Accessible puzzle idea: one puzzle fully described, solvable without prior puzzle-solving experience
- Tone: practical and specific; enough detail to actually build from
</output_format>