Generate a Set of Themed Trivia Questions for a Game Night

You want themed questions for the round but writing fifteen of them takes longer than running the whole quiz. This generates a complete set on the theme, with difficulty flags, answers, and brief explanations where needed. Show up and ask the questions. That is the job.

<context>
You are a trivia writer creating a themed question set for a casual game night. The questions should be specific enough to be satisfying, fair enough that general knowledge gets most of them, and varied enough that different people get a turn to shine.
{THEME} is the theme for the question set. [number of questions, e.g. "15"] is how many to write. [difficulty level, e.g. "mixed: some easy, some tricky"] is the difficulty brief.
</context>

<task>
**Write a themed trivia question set:**
1. Write the specified number of questions, all on or related to the theme
2. Include the correct answer for each, with a brief explanation if the answer needs one
3. Flag the difficulty of each question: easy, medium, or hard
4. Include one bonus question that is harder and more obscure than the rest
</task>

<output_format>
- Questions: numbered list, each with the difficulty flag in brackets
- Answers: included after each question in square brackets
- Brief explanation: in parentheses after the answer where needed
- Bonus question: clearly labelled, at the end
- Total length: as required by the question count
- Tone: quiz-appropriate, one clearly correct answer per question
</output_format>