Update app.py

app.py

@@ -916,9 +916,9 @@ print("=" * 50)
 print("STARTING MCQ GENERATOR APP")
 print("=" * 50)
 
-# ------------------------------ 
+# ------------------------------
 # Chapter Names (Actual Textbook Chapters)
-# ------------------------------ 
+# ------------------------------
 CHAPTER_NAMES = {
     "biology": [
         "Reproduction in Lower and Higher Plants",
@@ -975,9 +975,9 @@ CHAPTER_NAMES = {
     ]
 }
 
-# ------------------------------ 
+# ------------------------------
 # Initialize Groq API Client
-# ------------------------------ 
+# ------------------------------
 print("\nStep 1: Checking Groq API Key...")
 print("-" * 50)
 
@@ -995,8 +995,10 @@ if not GROQ_API_KEY:
 else:
     print(f"✓ GROQ_API_KEY found ({len(GROQ_API_KEY)} chars)")
     print(f"  First 20 chars: {GROQ_API_KEY[:20]}...")
+    
     try:
         groq_client = Groq(api_key=GROQ_API_KEY)
+        
         # Test the API
         print("  Testing API connection...")
         test = groq_client.chat.completions.create(
@@ -1005,6 +1007,7 @@ else:
             max_tokens=5
         )
         print("✓ Groq API working!")
+        
     except Exception as e:
         print(f"❌ Groq API initialization failed:")
         print(f"   Error: {str(e)}")
@@ -1012,16 +1015,16 @@ else:
 
 print("-" * 50)
 
-# ------------------------------ 
+# ------------------------------
 # Load embedding model (CPU)
-# ------------------------------ 
+# ------------------------------
 print("\nStep 2: Loading embedding model...")
 embed_model = SentenceTransformer("all-MiniLM-L6-v2")
 print("✓ Embedding model loaded")
 
-# ------------------------------ 
+# ------------------------------
 # Download files from Hugging Face
-# ------------------------------ 
+# ------------------------------
 REPO_ID = "Redfire-1234/pcb_tutor"
 
 print("\nStep 3: Downloading subject files...")
@@ -1044,7 +1047,6 @@ except Exception as e:
 
 # Load all subjects into memory
 print("\nStep 4: Loading subject data into memory...")
-
 SUBJECTS = {
     "biology": {
         "chunks": pickle.load(open(bio_chunks_path, "rb")),
@@ -1068,9 +1070,9 @@ print("\n" + "=" * 50)
 print("✓ ALL SYSTEMS READY!")
 print("=" * 50 + "\n")
 
-# ------------------------------ 
+# ------------------------------
 # Caching
-# ------------------------------ 
+# ------------------------------
 MCQ_CACHE = {}
 MAX_CACHE_SIZE = 100
 
@@ -1082,9 +1084,9 @@ def cache_mcq(key, mcqs):
         MCQ_CACHE.pop(next(iter(MCQ_CACHE)))
     MCQ_CACHE[key] = mcqs
 
-# ------------------------------ 
+# ------------------------------
 # RAG Search
-# ------------------------------ 
+# ------------------------------
 def rag_search(query, subject, k=5):
     if subject not in SUBJECTS:
         return None
@@ -1102,9 +1104,9 @@ def rag_search(query, subject, k=5):
     
     return "\n\n".join(results)
 
-# ------------------------------ 
+# ------------------------------
 # Topic Validation (Check if topic belongs to subject)
-# ------------------------------ 
+# ------------------------------
 def validate_topic_subject(topic, subject):
     """
     Validate if the topic belongs to the selected subject using LLM
@@ -1113,9 +1115,7 @@ def validate_topic_subject(topic, subject):
     if not groq_client:
         return True  # Skip validation if API not available
     
-    validation_prompt = f"""You are a Class 12 PCB subject expert.
-
-Determine if the following topic belongs to {subject.title()}.
+    validation_prompt = f"""You are a Class 12 PCB subject expert. Determine if the following topic belongs to {subject.title()}.
 
 Topic: "{topic}"
 Subject: {subject.title()}
@@ -1159,9 +1159,9 @@ Answer:"""
         print(f"⚠️ Validation failed: {e}")
         return True  # Allow on error to avoid blocking
 
-# ------------------------------ 
+# ------------------------------
 # Chapter Detection (Using Actual Chapter Names)
-# ------------------------------ 
+# ------------------------------
 def detect_chapter_from_list(context, topic, subject):
     """
     Detect chapter using the actual chapter list by matching keywords
@@ -1269,19 +1269,17 @@ Response:"""
         print(f"⚠️ Chapter detection failed: {e}")
         return None
 
-# ------------------------------ 
+# ------------------------------
 # MCQ Generation
-# ------------------------------ 
+# ------------------------------
 def generate_mcqs(context, topic, subject, num_questions=5):
     # Check if Groq is available
     if not groq_client:
         error_msg = """ERROR: Groq API not initialized!
-
 Please check:
 1. GROQ_API_KEY is set in Space Settings → Repository secrets
 2. API key is valid (get one from https://console.groq.com/keys)
 3. Space has been restarted after adding the key
-
 Current status: API key not found or invalid."""
         return error_msg, None
     
@@ -1305,17 +1303,14 @@ Current status: API key not found or invalid."""
         return error_msg, None
     
     prompt = f"""You are a Class-12 {subject.title()} teacher creating MCQs.
-
 Topic: "{topic}"
 Chapter: "{chapter}"
-
 Reference material from textbook:
 {context[:1500]}
 
 Generate exactly {num_questions} multiple-choice questions based on the reference material.
 
 FORMAT (follow EXACTLY):
-
 Q1. [Question based on material]
 A) [Option 1]
 B) [Option 2]
@@ -1372,12 +1367,10 @@ Generate {num_questions} MCQs now:"""
         
     except Exception as e:
         error_msg = f"""Error calling Groq API: {str(e)}
-
 Possible causes:
 1. Rate limit exceeded (wait a moment)
 2. Invalid API key
 3. Network issue
-
 Please try again in a few seconds."""
         print(f"❌ Groq API Error: {e}")
         return error_msg, chapter
@@ -1388,8 +1381,9 @@ def clean_mcq_output(text):
     
     for line in lines:
         line = line.strip()
+        
         if (re.match(r'^Q\d+\.', line) or 
-            line.startswith(('A)', 'B)', 'C)', 'D)', 'Answer:', 'Correct Answer:')) or 
+            line.startswith(('A)', 'B)', 'C)', 'D)', 'Answer:', 'Correct Answer:')) or
             not line):
             
             if line.startswith('Correct Answer:'):
@@ -1399,30 +1393,23 @@ def clean_mcq_output(text):
     
     return '\n'.join(cleaned_lines)
 
-# ------------------------------ 
+# ------------------------------
 # HTML UI
-# ------------------------------ 
+# ------------------------------
+
 HTML_TEMPLATE = """
 <!DOCTYPE html>
-<html lang="en">
+<html>
 <head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Class 12 PCB MCQ Generator</title>
     <style>
-        * {
-            margin: 0;
-            padding: 0;
-            box-sizing: border-box;
-        }
-
+        * { margin: 0; padding: 0; box-sizing: border-box; }
         body {
             font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             min-height: 100vh;
             padding: 20px;
         }
-
         .container {
             max-width: 900px;
             margin: 0 auto;
@@ -1431,146 +1418,120 @@ HTML_TEMPLATE = """
             box-shadow: 0 20px 60px rgba(0,0,0,0.3);
             overflow: hidden;
         }
-
         .header {
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             color: white;
             padding: 30px;
             text-align: center;
         }
-
-        .header h1 {
-            font-size: 2.5em;
-            margin-bottom: 10px;
-        }
-
-        .header p {
-            opacity: 0.9;
-            font-size: 1.1em;
-        }
-
-        .subject-tabs {
+        .header h1 { font-size: 2.5em; margin-bottom: 10px; }
+        .content { padding: 40px; }
+        .form-group { margin-bottom: 25px; }
+        .form-row {
             display: flex;
-            background: #f8f9fa;
-            border-bottom: 2px solid #e9ecef;
-        }
-
-        .subject-tab {
-            flex: 1;
-            padding: 20px;
-            text-align: center;
-            cursor: pointer;
-            background: white;
-            border: none;
-            font-size: 1.1em;
-            font-weight: 600;
-            color: #6c757d;
-            transition: all 0.3s;
+            gap: 15px;
+            margin-bottom: 25px;
         }
-
-        .subject-tab:hover {
-            background: #f8f9fa;
+        .form-row .form-group {
+            margin-bottom: 0;
         }
-
-        .subject-tab.active {
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-            color: white;
-        }
-
-        .form-section {
-            padding: 40px;
+        .form-row .form-group:first-child {
+            flex: 2;
         }
-
-        .form-group {
-            margin-bottom: 25px;
+        .form-row .form-group:last-child {
+            flex: 1;
+            min-width: 140px;
         }
-
-        .form-group label {
+        label {
             display: block;
-            margin-bottom: 10px;
             font-weight: 600;
+            margin-bottom: 10px;
             color: #333;
-            font-size: 1.1em;
+            font-size: 16px;
         }
-
-        .form-group input {
+        select, input {
             width: 100%;
             padding: 15px;
-            border: 2px solid #e9ecef;
+            border: 2px solid #e0e0e0;
             border-radius: 10px;
-            font-size: 1em;
-            transition: border 0.3s;
+            font-size: 16px;
+            font-family: inherit;
+            transition: border-color 0.3s;
         }
-
-        .form-group input:focus {
+        select:focus, input:focus {
             outline: none;
             border-color: #667eea;
         }
-
-        /* Updated layout for topic and MCQ count */
-        .topic-mcq-row {
-            display: flex;
-            gap: 15px;
-            align-items: flex-end;
-        }
-
-        .topic-input-wrapper {
-            flex: 1;
-        }
-
-        .mcq-count-wrapper {
-            width: 120px;
-        }
-
-        .form-group select {
-            width: 100%;
-            padding: 12px;
-            border: 2px solid #e9ecef;
-            border-radius: 10px;
-            font-size: 0.95em;
-            background: white;
-            cursor: pointer;
-            transition: border 0.3s;
-        }
-
-        .form-group select:focus {
-            outline: none;
-            border-color: #667eea;
-        }
-
-        .generate-btn {
+        button {
             width: 100%;
             padding: 18px;
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             color: white;
             border: none;
             border-radius: 10px;
-            font-size: 1.2em;
+            font-size: 18px;
             font-weight: 600;
             cursor: pointer;
-            transition: transform 0.2s, box-shadow 0.3s;
+            transition: all 0.3s;
         }
-
-        .generate-btn:hover {
+        button:hover {
             transform: translateY(-2px);
-            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
+            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
         }
-
-        .generate-btn:active {
-            transform: translateY(0);
+        button:disabled {
+            background: #ccc;
+            cursor: not-allowed;
+            transform: none;
         }
-
-        .loading {
+        .result {
+            margin-top: 30px;
+            padding: 25px;
+            background: #f8f9fa;
+            border-radius: 10px;
+            border-left: 4px solid #667eea;
             display: none;
-            text-align: center;
-            padding: 30px;
+        }
+        .result.show { display: block; }
+        .result h3 {
             color: #667eea;
+            margin-bottom: 20px;
+            font-size: 1.4em;
         }
-
-        .loading.show {
-            display: block;
+        .chapter-info {
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            padding: 15px 20px;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            display: flex;
+            align-items: center;
+            gap: 10px;
+            font-size: 16px;
         }
-
+        .chapter-icon {
+            font-size: 24px;
+        }
+        .chapter-text {
+            flex: 1;
+        }
+        .chapter-name {
+            font-weight: 700;
+            font-size: 18px;
+        }
+        .mcq-content {
+            background: white;
+            padding: 25px;
+            border-radius: 8px;
+            white-space: pre-wrap;
+            line-height: 1.9;
+            font-size: 15px;
+        }
+        .loading {
+            text-align: center;
+            padding: 30px;
+            display: none;
+        }
+        .loading.show { display: block; }
         .spinner {
             border: 4px solid #f3f3f3;
             border-top: 4px solid #667eea;
@@ -1578,60 +1539,30 @@ HTML_TEMPLATE = """
             width: 50px;
             height: 50px;
             animation: spin 1s linear infinite;
-            margin: 0 auto 20px;
+            margin: 0 auto 15px;
         }
-
         @keyframes spin {
             0% { transform: rotate(0deg); }
             100% { transform: rotate(360deg); }
         }
-
-        .result-section {
-            display: none;
-            padding: 40px;
-            background: #f8f9fa;
-        }
-
-        .result-section.show {
-            display: block;
-        }
-
-        .chapter-badge {
+        .subject-tag {
             display: inline-block;
-            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-            color: white;
-            padding: 10px 20px;
-            border-radius: 25px;
-            margin-bottom: 20px;
+            padding: 5px 15px;
+            border-radius: 20px;
+            font-size: 13px;
             font-weight: 600;
+            margin-right: 10px;
         }
-
-        .mcq-output {
-            background: white;
-            padding: 30px;
+        .bio { background: #d4edda; color: #155724; }
+        .chem { background: #d1ecf1; color: #0c5460; }
+        .phy { background: #f8d7da; color: #721c24; }
+        .api-badge {
+            background: #17a2b8;
+            color: white;
+            padding: 5px 12px;
             border-radius: 15px;
-            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
-            white-space: pre-wrap;
-            font-family: 'Courier New', monospace;
-            line-height: 1.8;
-        }
-
-        .error-message {
-            background: #f8d7da;
-            color: #721c24;
-            padding: 20px;
-            border-radius: 10px;
-            border-left: 4px solid #f5c6cb;
-            margin: 20px 0;
-        }
-
-        .info-badge {
-            background: #d1ecf1;
-            color: #0c5460;
-            padding: 15px;
-            border-radius: 10px;
-            margin-top: 20px;
-            text-align: center;
+            font-size: 12px;
+            margin-left: 10px;
         }
     </style>
 </head>
@@ -1639,169 +1570,151 @@ HTML_TEMPLATE = """
     <div class="container">
         <div class="header">
             <h1>🎓 Class 12 PCB MCQ Generator</h1>
-            <p>Generate practice MCQs from your textbooks ⚡ Llama 3.3 70B</p>
-        </div>
-
-        <div class="subject-tabs">
-            <button class="subject-tab active" data-subject="biology">Biology</button>
-            <button class="subject-tab" data-subject="chemistry">Chemistry</button>
-            <button class="subject-tab" data-subject="physics">Physics</button>
+            <p style="font-size: 1.1em; margin-bottom: 15px;">
+                Generate practice MCQs from your textbooks 
+                <span class="api-badge">⚡ Llama 3.3 70B</span>
+            </p>
+            <div>
+                <span class="subject-tag bio">Biology</span>
+                <span class="subject-tag chem">Chemistry</span>
+                <span class="subject-tag phy">Physics</span>
+            </div>
         </div>
-
-        <div class="form-section">
-            <form id="mcqForm">
+        
+        <div class="content">
+            <div class="form-group">
+                <label for="subject">📚 Select Subject</label>
+                <select id="subject">
+                    <option value="biology">Biology</option>
+                    <option value="chemistry">Chemistry</option>
+                    <option value="physics">Physics</option>
+                </select>
+            </div>
+            
+            <div class="form-row">
                 <div class="form-group">
-                    <label>📚 Select Subject</label>
-                    <select id="subject">
-                        <option value="biology">Biology</option>
-                        <option value="chemistry">Chemistry</option>
-                        <option value="physics">Physics</option>
-                    </select>
+                    <label for="topic">✏️ Enter Topic</label>
+                    <input type="text" id="topic" placeholder="e.g., Mitochondria, Chemical Bonding, Newton's Laws">
                 </div>
-
+                
                 <div class="form-group">
-                    <label>✏️ Enter Topic</label>
-                    <div class="topic-mcq-row">
-                        <div class="topic-input-wrapper">
-                            <input type="text" id="topic" placeholder="e.g., Photosynthesis, Electrolysis, Projectile Motion" required>
-                        </div>
-                        <div class="mcq-count-wrapper">
-                            <label style="font-size: 0.9em; margin-bottom: 5px;">🔢 MCQs</label>
-                            <select id="numQuestions">
-                                <option value="1">1 MCQ</option>
-                                <option value="2">2 MCQs</option>
-                                <option value="3">3 MCQs</option>
-                                <option value="4">4 MCQs</option>
-                                <option value="5" selected>5 MCQs</option>
-                                <option value="6">6 MCQs</option>
-                                <option value="7">7 MCQs</option>
-                                <option value="8">8 MCQs</option>
-                                <option value="9">9 MCQs</option>
-                                <option value="10">10 MCQs</option>
-                                <option value="11">11 MCQs</option>
-                                <option value="12">12 MCQs</option>
-                                <option value="13">13 MCQs</option>
-                                <option value="14">14 MCQs</option>
-                                <option value="15">15 MCQs</option>
-                                <option value="16">16 MCQs</option>
-                                <option value="17">17 MCQs</option>
-                                <option value="18">18 MCQs</option>
-                                <option value="19">19 MCQs</option>
-                                <option value="20">20 MCQs</option>
-                            </select>
-                        </div>
-                    </div>
+                    <label for="numQuestions">🔢 MCQs</label>
+                    <select id="numQuestions">
+                        <option value="1">1</option>
+                        <option value="2">2</option>
+                        <option value="3">3</option>
+                        <option value="4">4</option>
+                        <option value="5" selected>5</option>
+                        <option value="6">6</option>
+                        <option value="7">7</option>
+                        <option value="8">8</option>
+                        <option value="9">9</option>
+                        <option value="10">10</option>
+                        <option value="11">11</option>
+                        <option value="12">12</option>
+                        <option value="13">13</option>
+                        <option value="14">14</option>
+                        <option value="15">15</option>
+                        <option value="16">16</option>
+                        <option value="17">17</option>
+                        <option value="18">18</option>
+                        <option value="19">19</option>
+                        <option value="20">20</option>
+                    </select>
                 </div>
-
-                <button type="submit" class="generate-btn">🚀 Generate MCQs</button>
-            </form>
-
+            </div>
+            
+            <button onclick="generateMCQs()">🚀 Generate MCQs</button>
+            
             <div class="loading" id="loading">
                 <div class="spinner"></div>
-                <p><strong>Generating MCQs with AI...</strong></p>
-                <p>⚡ Detecting chapter from textbook...</p>
+                <p style="color: #666; font-size: 16px;">Generating MCQs with AI...</p>
+                <p style="color: #999; font-size: 13px; margin-top: 10px;">⚡ Detecting chapter from textbook...</p>
             </div>
-        </div>
-
-        <div class="result-section" id="resultSection">
-            <h2>📝 Generated MCQs:</h2>
-            <div id="chapterInfo"></div>
-            <div class="mcq-output" id="mcqOutput"></div>
-            <div class="info-badge">
-                ✓ High Quality: Generated by Llama 3.3 70B via Groq API
+            
+            <div class="result" id="result">
+                <h3>📝 Generated MCQs:</h3>
+                
+                <div class="chapter-info" id="chapterInfo" style="display: none;">
+                    <span class="chapter-icon">📖</span>
+                    <div class="chapter-text">
+                        <div style="font-size: 13px; opacity: 0.9;">Chapter:</div>
+                        <div class="chapter-name" id="chapterName"></div>
+                    </div>
+                </div>
+                
+                <div style="background: #d4edda; padding: 12px; border-radius: 6px; margin-bottom: 15px; color: #155724; font-size: 14px;">
+                    ✓ <strong>High Quality:</strong> Generated by Llama 3.3 70B via Groq API
+                </div>
+                <div class="mcq-content" id="mcqContent"></div>
             </div>
         </div>
     </div>
-
     <script>
-        // Subject tab switching
-        const tabs = document.querySelectorAll('.subject-tab');
-        const subjectSelect = document.getElementById('subject');
-
-        tabs.forEach(tab => {
-            tab.addEventListener('click', () => {
-                tabs.forEach(t => t.classList.remove('active'));
-                tab.classList.add('active');
-                
-                const subject = tab.dataset.subject;
-                subjectSelect.value = subject;
-            });
-        });
-
-        // Form submission
-        document.getElementById('mcqForm').addEventListener('submit', async (e) => {
-            e.preventDefault();
-
+        async function generateMCQs() {
             const subject = document.getElementById('subject').value;
-            const topic = document.getElementById('topic').value;
-            const numQuestions = document.getElementById('numQuestions').value;
-
-            // Show loading, hide results
-            document.getElementById('loading').classList.add('show');
-            document.getElementById('resultSection').classList.remove('show');
-
+            const topic = document.getElementById('topic').value.trim();
+            const numQuestions = parseInt(document.getElementById('numQuestions').value);
+            
+            if (!topic) {
+                alert('⚠️ Please enter a topic!');
+                return;
+            }
+            
+            const loading = document.getElementById('loading');
+            const result = document.getElementById('result');
+            const btn = document.querySelector('button');
+            const chapterInfo = document.getElementById('chapterInfo');
+            
+            loading.classList.add('show');
+            result.classList.remove('show');
+            chapterInfo.style.display = 'none';
+            btn.disabled = true;
+            btn.textContent = '⏳ Generating...';
+            
             try {
                 const response = await fetch('/generate', {
                     method: 'POST',
-                    headers: {
-                        'Content-Type': 'application/json'
-                    },
-                    body: JSON.stringify({
-                        subject: subject,
-                        topic: topic,
-                        num_questions: parseInt(numQuestions)
-                    })
+                    headers: {'Content-Type': 'application/json'},
+                    body: JSON.stringify({subject, topic, num_questions: numQuestions})
                 });
-
+                
                 const data = await response.json();
-
-                // Hide loading
-                document.getElementById('loading').classList.remove('show');
-
-                if (response.ok) {
-                    // Show results
-                    const chapterInfo = document.getElementById('chapterInfo');
-                    if (data.chapter) {
-                        chapterInfo.innerHTML = `<span class="chapter-badge">📖 Chapter: ${data.chapter}</span>`;
-                    } else {
-                        chapterInfo.innerHTML = '';
-                    }
-                    
-                    document.getElementById('mcqOutput').textContent = data.mcqs;
-                    document.getElementById('resultSection').classList.add('show');
-                    
-                    // Scroll to results
-                    document.getElementById('resultSection').scrollIntoView({ behavior: 'smooth' });
-                } else {
-                    // Show error
-                    document.getElementById('resultSection').innerHTML = `
-                        <div class="error-message">
-                            <strong>❌ Error:</strong><br>
-                            ${data.error}
-                        </div>
-                    `;
-                    document.getElementById('resultSection').classList.add('show');
+                
+                if (data.error) {
+                    alert('❌ Error: ' + data.error);
+                    return;
                 }
-
+                
+                // Display chapter info
+                if (data.chapter && data.chapter !== 'Unknown Chapter') {
+                    document.getElementById('chapterName').textContent = data.chapter;
+                    chapterInfo.style.display = 'flex';
+                }
+                
+                document.getElementById('mcqContent').textContent = data.mcqs;
+                result.classList.add('show');
             } catch (error) {
-                document.getElementById('loading').classList.remove('show');
-                document.getElementById('resultSection').innerHTML = `
-                    <div class="error-message">
-                        <strong>❌ Network Error:</strong><br>
-                        ${error.message}
-                    </div>
-                `;
-                document.getElementById('resultSection').classList.add('show');
+                alert('❌ Error: ' + error.message);
+            } finally {
+                loading.classList.remove('show');
+                btn.disabled = false;
+                btn.textContent = '🚀 Generate MCQs';
+            }
+        }
+        
+        document.getElementById('topic').addEventListener('keypress', function(e) {
+            if (e.key === 'Enter') {
+                generateMCQs();
             }
         });
     </script>
 </body>
 </html>
 """
-
-# ------------------------------ 
+# ------------------------------
 # Routes
-# ------------------------------ 
+# ------------------------------
 @app.route("/")
 def home():
     return render_template_string(HTML_TEMPLATE)
@@ -1834,7 +1747,7 @@ def generate():
         if not validate_topic_subject(topic, subject):
             subject_names = {
                 "biology": "Biology",
-                "chemistry": "Chemistry",
+                "chemistry": "Chemistry", 
                 "physics": "Physics"
             }
             error_msg = f"The topic '{topic}' does not appear to be related to {subject_names[subject]}.\n\nPlease either:\n• Enter a {subject_names[subject]}-related topic, or\n• Select the correct subject for this topic"
@@ -1859,11 +1772,11 @@ def generate():
             return jsonify({"error": mcqs}), 400
         
         return jsonify({
-            "mcqs": mcqs,
+            "mcqs": mcqs, 
             "subject": subject,
             "chapter": chapter
         })
-        
+    
     except Exception as e:
         print(f"❌ Error: {e}")
         import traceback
@@ -1878,10 +1791,11 @@ def health():
         "cache_size": len(MCQ_CACHE)
     })
 
-# ------------------------------ 
+# ------------------------------
 # Run
-# ------------------------------ 
+# ------------------------------
 if __name__ == "__main__":
     port = int(os.environ.get("PORT", 7860))
     print(f"\n🚀 Starting server on port {port}...\n")
-    app.run(host="0.0.0.0", port=port, debug=False)
+    app.run(host="0.0.0.0", port=port, debug=False)
+