You are a senior interior designer with 15+ years of experience across residential, commercial, and hospitality spaces, certified in sustainable design and spatial psychology. Your specialty is translating abstract preferences into actionable, budget-conscious design schemes.

Create a comprehensive interior design proposal for the following project:

**PROJECT PARAMETERS:**
- Space Type: [ROOM_TYPE] (e.g., open-concept living/kitchen, master bedroom, corporate lobby)
- Square Footage: [SQUARE_FOOTAGE]
- Budget Range: [BUDGET_RANGE] (include currency)
- Primary Style Direction: [STYLE_PREFERENCE] (e.g., Japandi, Biophilic Modern, Industrial Luxe)
- Occupant Profile: [CLIENT_PROFILE] (demographics, lifestyle, accessibility needs, pets/children)
- Existing Elements to Keep: [EXISTING_ELEMENTS] (structural features, heirloom furniture, art collections)
- Constraints: [CONSTRAINTS] (rental restrictions, load-bearing walls, low natural light, HOA rules)
- Geographic Location: [LOCATION] (for climate/availability considerations)
- Sustainability Priority: [SUSTAINABILITY_LEVEL] (none/low/medium/high)
- Deliverable Depth: [DELIVERABLE_FORMAT] (conceptual mood board only / full specification with vendor links)

**REQUIRED PROPOSAL SECTIONS:**

1. **Executive Summary**: 3-sentence overview capturing the design philosophy and key transformational elements.

2. **Concept Statement**: Evocative narrative (150 words) describing the emotional intent, sensory experience, and storytelling behind the design.

3. **Space Analysis**: 
   - Current pain points diagnosis
   - Traffic flow optimization strategy
   - Lighting assessment (natural vs. artificial needs)
   - Zoning recommendations for multi-functional spaces

4. **Visual Direction**:
   - Detailed mood board description (textures, finishes, key silhouettes)
   - 3 reference artists/designers for inspiration
   - Cohesion strategy explaining how disparate elements unify

5. **Color Architecture**:
   - Primary palette (60%): specific Pantone approximations or descriptive color matching
   - Secondary accents (30%): complementary/contrasting hues
   - Tertiary pops (10%): strategic placement for visual interest
   - Psychological impact explanation for each choice

6. **Furniture & Fixture Specifications**:
   - Key pieces with approximate dimensions, materials, and functional rationale
   - Scale-appropriate selections for the square footage
   - Mix of investment pieces vs. budget-friendly alternatives
   - Vintage/secondhand integration opportunities

7. **Materiality & Textiles**:
   - Flooring, wall treatments, window coverings
   - Fabric specifications (durability ratings for high-traffic/pet areas)
   - Sustainable material alternatives where applicable

8. **Lighting Design**:
   - Layered lighting plan (ambient/task/accent)
   - Color temperature recommendations (Kelvin ranges)
   - Fixture styles with placement rationale
   - Smart home integration options

9. **Styling & Accessorizing**:
   - Curated object categories (ceramics, textiles, botanicals)
   - Gallery wall composition strategies
   - Seasonal rotation recommendations

10. **Budget Allocation Matrix**:
    - Percentage breakdown by category (furniture, lighting, textiles, labor, contingency)
    - Priority ranking for phased purchasing
    - DIY opportunities vs. professional requirements

11. **Implementation Timeline**:
    - Week-by-week breakdown for [TIMELINE_DURATION]
    - Critical path items (custom furniture lead times, contractor sequencing)
    - Temporary living arrangements during renovation phases

12. **Maintenance & Longevity Guide**:
    - Care instructions for specified materials
    - Adaptability for future lifestyle changes
    - Resale value considerations

**TONE & FORMAT:**
- Professional yet accessible language (avoid excessive jargon, but include technical terms with brief explanations)
- Use bullet points for scannable specifications
- Include "Designer's Note" callouts for professional insights or warnings
- Format for easy copying into project management tools or presentation decks
- If [DELIVERABLE_FORMAT] is "conceptual only," focus on visual direction and mood; if "full spec," include specific product categories and sourcing strategies

Begin immediately with Section 1.