@import url(https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap);@import url(https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap);:root{--primary-color:#2c3e50;--secondary-color:#3498db;--accent-color:#e74c3c;--background-color:#f5f6fa;--text-color:#2c3e50;--border-radius:8px;--box-shadow:0 2px 4px #0000001a}body{align-items:center;background-color:#f5f6fa;background-color:var(--background-color);color:#2c3e50;color:var(--text-color);display:flex;font-family:Inter,sans-serif;justify-content:center;padding:20px}:focus{outline:2px solid #3498db;outline:2px solid var(--secondary-color);outline-offset:2px}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-thumb{background:#3498db;background:var(--secondary-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#2980b9}::selection{background-color:#3498db;background-color:var(--secondary-color);color:#fff}.container{align-items:center;background-color:#fff;border-radius:8px;border-radius:var(--border-radius);box-shadow:0 2px 4px #0000001a;box-shadow:var(--box-shadow);display:flex;flex-direction:column;max-width:800px;padding:2rem;text-align:center;width:100%}h1{color:#2c3e50;color:var(--primary-color);font-size:32px;margin-bottom:1rem}.question-input{border:1px solid #ccc;border-radius:8px;border-radius:var(--border-radius);box-sizing:border-box;font-size:18px;margin-bottom:20px;padding:15px;transition:border-color .3s;width:100%}.question-input:focus{border-color:#3498db;border-color:var(--secondary-color)}button{background-color:#3498db;background-color:var(--secondary-color);border:none;border-radius:8px;border-radius:var(--border-radius);color:#fff;cursor:pointer;font-size:18px;padding:15px;transition:background-color .3s;width:100%}button:hover{background-color:#2980b9}.response{background-color:#f1f1f1;border-left:4px solid #3498db;border-left:4px solid var(--secondary-color);border-radius:8px;border-radius:var(--border-radius);box-sizing:border-box;font-size:18px;margin-top:20px;padding:20px;text-align:left;width:100%}.message.error{background-color:#f8d7da;border:1px solid #f5c6cb;color:#e74c3c;color:var(--accent-color);margin-top:1rem;padding:.75rem}.message.error,.student-panel{border-radius:8px;border-radius:var(--border-radius)}.student-panel{background-color:#fff;box-shadow:0 2px 4px #0000001a;box-shadow:var(--box-shadow);margin-top:2rem;max-width:600px;padding:2.5rem;text-align:center;width:100%}.student-panel h2{font-size:24px;margin-bottom:1rem}.answer-box{background-color:#e8f4ff;border-radius:8px;border-radius:var(--border-radius);box-shadow:0 2px 4px #0000001a;box-shadow:var(--box-shadow);font-size:18px;margin-top:20px;padding:20px;text-align:left;width:100%}:root{--primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#3b82f6;--primary-subtle:#eff6ff;--secondary:#0f172a;--secondary-light:#1e293b;--accent:#06b6d4;--accent-light:#22d3ee;--success:#10b981;--warning:#f59e0b;--error:#ef4444;--gray-50:#f8fafc;--gray-100:#f1f5f9;--gray-200:#e2e8f0;--gray-300:#cbd5e1;--gray-400:#94a3b8;--gray-500:#64748b;--gray-600:#475569;--gray-700:#334155;--gray-800:#1e293b;--gray-900:#0f172a;--white:#fff;--black:#000;--font-sans:"DM Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono","Fira 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#0000000d;box-shadow:var(--shadow-sm);color:#0f172a;color:var(--gray-900)}.auth-tab:hover:not(.active){color:#334155;color:var(--gray-700)}.auth-form{gap:20px}.auth-form,.input-group{display:flex;flex-direction:column}.input-group{gap:8px}.input-group label{color:#334155;color:var(--gray-700);font-size:.875rem;font-weight:600}.input-group input{background:#fff;background:var(--white);border:2px solid #e2e8f0;border:2px solid var(--gray-200);border-radius:12px;border-radius:var(--radius-md);color:#0f172a;color:var(--gray-900);font-family:DM Sans,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-family:var(--font-sans);font-size:1rem;outline:none;padding:14px 16px;transition:all .15s ease;transition:all var(--transition-fast)}.input-group input:focus{border-color:#2563eb;border-color:var(--primary);box-shadow:0 0 0 4px #eff6ff;box-shadow:0 0 0 4px var(--primary-subtle)}.input-group 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svg{height:22px;width:22px}.disclaimer{color:#94a3b8;color:var(--gray-400);font-size:.75rem;margin-top:12px;text-align:center}.messages-container::-webkit-scrollbar{width:6px}.messages-container::-webkit-scrollbar-track{background:#0000}.messages-container::-webkit-scrollbar-thumb{background:#cbd5e1;background:var(--gray-300);border-radius:3px}.messages-container::-webkit-scrollbar-thumb:hover{background:#94a3b8;background:var(--gray-400)}@media (max-width:768px){.app-header{padding:16px 20px}.logo-text{font-size:1.25rem}.user-email{display:none}.auth-card{margin:0 16px;padding:32px 24px}.chat-wrapper{padding:16px}.chat-card{border-radius:16px;border-radius:var(--radius-lg);min-height:calc(100vh - 140px)}.chat-header{padding:20px}.messages-container{padding:16px}.message{max-width:90%}.input-area{padding:16px}.input-wrapper input{padding:14px 16px}.suggested-questions button{font-size:.8125rem}}@media (max-width:480px){.auth-header h1{font-size:1.5rem}.empty-state{padding:40px 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