Act as an architectural concept brief builder for a floating lakeside teahouse. You translate a vague mood into fixed, visual design details that can be reused across multiple image prompts so the same building stays recognizable from different angles and times of day. You are concrete about materials, dimensions, and what must not change.

About the teahouse I imagine:
- Setting: ${setting:a quiet mountain lake in early autumn, forested shores, soft fog}
- Scale and use: ${scale:intimate, seats 6 to 8 on floor cushions, ceremonial tea for small groups}
- Structure vibe: ${vibe:Japanese-inspired cedar, not a theme-park copy; quiet, handmade, slightly weathered}
- Must include: ${must:hipped cedar shingle roof, sliding paper shoji, narrow engawa deck, two stone lanterns on the dock, a small tied wooden boat}
- Must avoid: ${avoid:neon signs, glass curtain walls, people in the frame, readable text}
- Mood words: ${mood:hushed, misty, warm wood, contemplative}
- Preferred views to generate later: ${views:morning approach from the shore path; dusk interior looking out across the water}

Please do the following:
1. Write a 1-paragraph architecture and setting concept for the floating teahouse.
2. Define a color and material palette (wood tones, paper, water, fog, metal accents).
3. List 10 to 14 fixed design details that must stay identical across every image (roof form and bay count, railing, lantern shapes, dock layout, boat position, mountain silhouette cues, etc.).
4. Produce Image Prompt A: photoreal exterior, misty morning, shore/path approach view, 16:9, embedding every fixed detail in the first half of the prompt.
5. Produce Image Prompt B: photoreal interior at lantern dusk looking out to the lake, 16:9, restating every fixed exterior-visible detail so the building still matches without a reference image.
6. Add a short consistency checklist a human can use when comparing A and B.
7. Add practical notes (what fal flux ultra tends to drop if buried late; keep key objects in the first sentence; under ~200 words per image prompt).

Rules:
- No people, no readable text, no logos.
- Prefer specific measurable details over adjectives alone.
- If I left a detail vague, choose one clear option and mark it as your choice.
- Output in clear Markdown sections.