refactor: apply Minimalist Brand Director prompt with Hero Object and category-based styling

app/services/flux.py

@@ -21,39 +21,60 @@ async def generate_poster(analysis: dict) -> str:
     """
     # Construct detailed prompt for Flux
     title = analysis.get('title', 'Brand')
+    category = analysis.get('category', 'Productivity')
+    hero_object = analysis.get('hero_object', 'a floating glass cube')
     atmosphere = analysis.get('atmosphere', 'modern and clean aesthetic')
     primary_color = analysis.get('primary_color', '#000000')
     accent_color = analysis.get('accent_color', '#FFFFFF')
     keywords = ', '.join(analysis.get('keywords', ['modern', 'minimal']))
     
+    # Category-specific style rules
+    if category == 'Productivity':
+        style_keywords = "Apple Style, Dieter Rams, Frosted Glass, Soft Studio Lighting, Minimalist, Zen, Spacious, Air"
+        negative_additions = "NO cluttered elements, NO complex machinery, NO glitch effects, NO random messy lines"
+    elif category == 'Dev':
+        style_keywords = "Matrix style, Clean dark mode, Terminal aesthetic, Code-inspired"
+        negative_additions = ""
+    elif category == 'Creative':
+        style_keywords = "Colorful, Abstract, Artistic, Expressive"
+        negative_additions = ""
+    else:
+        style_keywords = "Modern, Professional, Clean"
+        negative_additions = ""
+    
     prompt = f"""
-A high-fashion vertical poster design (9:16 ratio, 768x1344px). 
+A high-end vertical commercial poster design (9:16 aspect ratio, 768x1344px).
 
-VISUAL CONCEPT:
-- Brand essence: {title}
-- Atmosphere: {atmosphere}
-- Abstract metaphor representing the service (NOT website UI)
-- NO buttons, NO browser elements, NO screenshots
+COMPOSITION (MANDATORY):
+- **Center Composition:** Place '{hero_object}' in the center
+- **Negative Space:** Leave 40% of the image empty (clean background) to symbolize calmness
+- **Hero Object:** {hero_object}
 
-TEXT INTEGRATION:
-- Render "{title}" as a physical 3D object in the scene
-- Style options: Neon sign, Gold engraving, Concrete letters, Holographic floating text
-- Position: Center or top-center, bold typography
+BRAND TEXT:
+- The word '{title}' formed by a 3D object (glowing neon tube floating in air, or engraved in metal)
+- Font style: Swiss Typography, Clean Sans-serif
+- Position: Top-center or integrated with hero object
 - ENGLISH ONLY (no Korean characters)
 
-COLOR PALETTE:
+COLOR PALETTE (STRICT):
 - Primary: {primary_color}
 - Accent: {accent_color}
-- Professional gradient or solid backgrounds
+- Use gradients or solid backgrounds only
 
-STYLE & QUALITY:
-- Abstract, geometric, minimalist luxury branding
+STYLE ENFORCERS:
+- {style_keywords}
 - Keywords: {keywords}
-- Unreal Engine 5 render, 8K, volumetric lighting
+- Atmosphere: {atmosphere}
+
+QUALITY BOOSTERS:
+- Unreal Engine 5, 8K, Octane Render, Ray Tracing
+- Super-Resolution, Anti-Aliasing
 - Cinematic composition, award-winning design
-- Professional graphic design aesthetic
+
+CATEGORY: {category}
 """
-    negative_prompt = "text, letters, words, typography, watermark, signature, blurry, low quality, photograph, realistic, 3d render"
+    
+    negative_prompt = f"text, letters, words, typography, watermark, signature, blurry, low quality, photograph, realistic, 3d render, {negative_additions}"
     
     # Use new HF router endpoint directly
     headers = {

app/services/gemini.py

@@ -27,33 +27,34 @@ async def analyze_with_gemini(screenshot_path: str) -> dict:
     img = Image.open(screenshot_path)
     
     prompt = """
-You are an **Elite Visual UX Researcher & Brand Strategist**.
-Your mission is to perform a "Deep Contextual Analysis" of the provided website screenshot.
+You are a **Minimalist Brand Director** (think Apple or Dieter Rams style).
+Your mission is to analyze the website screenshot and extract its "Visual Soul" for a high-end poster.
 
-*** CORE TASK: READ THE SOUL OF THE SERVICE ***
-Do not just look at the colors. You must **READ the text (OCR)** and **INTERPRET the purpose**.
+*** CRITICAL ANALYSIS PROTOCOL ***
 
-1. **OCR & Context Extraction (MANDATORY):**
-   - Read the Headline (H1), Sub-headline, and Buttons.
-   - **Answer this:** What problem does this service solve?
-     - *Example:* If text says "Track your time", the essence is **"EFFICIENCY & FLOW"**.
-     - *Example:* If text says "Premium Leather", the essence is **"CRAFTSMANSHIP & LUXURY"**.
-     - *Example:* If text says "Shin Ramyun", the essence is **"SPICY & ENERGY"**.
+1. **READ THE TEXT & CONTEXT (OCR):**
+   - Look for keywords: "Focus", "Task", "Simple", "Flow", "Team".
+   - **JUDGMENT:**
+     - If it's a **Productivity/Tool** (like FocusHub): The visual MUST be **Clean, Organized, Zen, Glass-like**. (FORBIDDEN: Chaos, messy wires, glitch art).
+     - If it's **Creative/Art**: Colorful and abstract is okay.
+     - If it's **Dev/Code**: Matrix style or clean dark mode is okay.
 
-2. **Target Audience Profiling:**
-   - Who uses this? (Gamers? CEOs? Parents? Developers?)
-   - The final visual must appeal to their specific taste.
+2. **VISUAL ANCHOR (The Main Subject):**
+   - Don't just say "abstract background". Define a **Single "Hero Object"**.
+   - *Good Examples:* "A single perfect crystal cube", "A glowing ring of light", "A floating glass sheet".
+   - *Bad Examples:* "Complex city", "Random shapes", "Circuit board patterns".
 
-3. **Brand Identity Decoding:**
-   - **Name:** Find the logo or brand name.
-     - **RULE:** If Korean (Hangul) is detected, **Translate/Romanize it to English** immediately. (e.g., '집중' -> 'FOCUS').
-   - **Color Psychology:** What mood do the colors convey? (Trust, Passion, Calm).
+3. **BRAND IDENTITY:**
+   - **Name:** If Korean detected, Romanize it (e.g., '집중' -> 'FOCUS').
+   - **Color:** Strict adherence to the site's dominant color (e.g., Deep Blue -> keep it Blue/Indigo, don't add random Pink/Purple).
 
 *** OUTPUT FORMAT (JSON ONLY) ***
 {
   "title": "Core brand keyword in 1-2 words (ENGLISH ONLY)",
-  "atmosphere": "Visual mood description in 30 words (ENGLISH)",
-  "primary_color": "Main color hex code",
+  "category": "One of: Productivity, Creative, Dev, Commerce, Social",
+  "hero_object": "Single concrete visual element for the poster (e.g., 'floating glass cube')",
+  "atmosphere": "Visual mood description in 20 words (ENGLISH)",
+  "primary_color": "Main color hex code (from website)",
   "accent_color": "Accent color hex code",
   "keywords": ["keyword1", "keyword2", "keyword3", "keyword4", "keyword5"]
 }