:root{--primary-color: #4a6fa5;--primary-dark: #3a5a80;--secondary-color: #6c757d;--success-color: #28a745;--danger-color: #dc3545;--warning-color: #ffc107;--light-color: #f8f9fa;--dark-color: #343a40;--white: #ffffff;--gray-100: #f8f9fa;--gray-200: #e9ecef;--gray-300: #dee2e6;--gray-400: #ced4da;--gray-500: #adb5bd;--gray-600: #6c757d;--gray-700: #495057;--gray-800: #343a40;--gray-900: #212529;--border-radius: .25rem;--box-shadow: 0 .5rem 1rem rgba(0, 0, 0, .15);--transition: all .3s ease-in-out}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--gray-800);background-color:var(--gray-100);min-height:100vh}a{color:var(--primary-color);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;border:none;border-radius:var(--border-radius);padding:.5rem 1rem;font-size:1rem;transition:var(--transition)}button:disabled{opacity:.7;cursor:not-allowed}input,textarea{width:100%;padding:.75rem;margin-bottom:1rem;border:1px solid var(--gray-300);border-radius:var(--border-radius);font-size:1rem;transition:var(--transition)}input:focus,textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 .2rem #4a6fa540}.error-message{color:var(--danger-color);margin-bottom:1rem;padding:.5rem;background-color:#dc35451a;border-radius:var(--border-radius)}.login-container,.register-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:1rem;background-color:var(--gray-100)}.login-card,.register-card{width:100%;max-width:400px;padding:2rem;background-color:var(--white);border-radius:var(--border-radius);box-shadow:var(--box-shadow)}.login-card h2,.register-card h2{text-align:center;margin-bottom:1.5rem;color:var(--primary-color)}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group.checkbox{display:flex;align-items:center}.form-group.checkbox input{width:auto;margin-right:.5rem;margin-bottom:0}.form-group.checkbox label{margin-bottom:0}.login-button,.register-button{width:100%;background-color:var(--primary-color);color:var(--white);padding:.75rem;margin-bottom:1rem;font-weight:500}.login-button:hover,.register-button:hover{background-color:var(--primary-dark)}.login-link,.register-link{text-align:center;margin-top:1rem}.login-link span,.register-link span{color:var(--primary-color);cursor:pointer}.login-link span:hover,.register-link span:hover{text-decoration:underline}.chat-container{display:flex;flex-direction:column;height:100vh;max-width:1200px;margin:0 auto;background-color:var(--white);box-shadow:var(--box-shadow)}.chat-header{display:flex;justify-content:space-between;align-items:center;padding:1rem;background-color:var(--primary-color);color:var(--white)}.chat-header h2{margin:0}.chat-actions{display:flex;gap:.5rem}.chat-actions button{background-color:var(--white);color:var(--primary-color);font-weight:500}.chat-actions button:hover{background-color:var(--gray-200)}.messages-container{flex:1;padding:1rem;overflow-y:auto;display:flex;flex-direction:column;gap:1rem;background-color:var(--gray-100)}.empty-chat,.loading-messages{display:flex;justify-content:center;align-items:center;height:100%;color:var(--gray-600);font-style:italic}.message{max-width:70%;padding:.75rem 1rem;border-radius:1rem;position:relative}.user-message{align-self:flex-end;background-color:var(--primary-color);color:var(--white);border-bottom-right-radius:.25rem}.bot-message{align-self:flex-start;background-color:var(--gray-300);color:var(--gray-800);border-bottom-left-radius:.25rem}.message-content{word-break:break-word}.message-time{font-size:.75rem;opacity:.8;margin-top:.25rem;text-align:right}.typing-indicator{display:flex;gap:.25rem}.typing-indicator span{width:.5rem;height:.5rem;background-color:var(--gray-600);border-radius:50%;animation:typing 1s infinite ease-in-out}.typing-indicator span:nth-child(1){animation-delay:0s}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,to{transform:translateY(0)}50%{transform:translateY(-.5rem)}}.message-form{display:flex;padding:1rem;background-color:var(--white);border-top:1px solid var(--gray-300)}.message-form input{flex:1;margin-bottom:0;margin-right:.5rem}.message-form button{background-color:var(--primary-color);color:var(--white)}.message-form button:hover{background-color:var(--primary-dark)}.message-form button:disabled{background-color:var(--gray-400)}.admin-container{max-width:1200px;margin:0 auto;padding:1rem;background-color:var(--white);min-height:100vh;box-shadow:var(--box-shadow)}.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;border-bottom:1px solid var(--gray-300)}.admin-header h2{color:var(--primary-color);margin:0}.admin-header button{background-color:var(--primary-color);color:var(--white);margin-left:.5rem}.admin-header button:hover{background-color:var(--primary-dark)}.admin-content{display:grid;grid-template-columns:1fr;gap:2rem}@media (min-width: 768px){.admin-content{grid-template-columns:1fr 1fr}.faq-list-section{grid-column:1 / -1}}.add-faq-section,.upload-pdf-section,.faq-list-section{background-color:var(--gray-100);padding:1.5rem;border-radius:var(--border-radius);box-shadow:0 .125rem .25rem #00000013}.add-faq-section h3,.upload-pdf-section h3,.faq-list-section h3{margin-bottom:1.5rem;color:var(--primary-color);border-bottom:2px solid var(--primary-color);padding-bottom:.5rem;display:inline-block}.extracted-faqs{margin-top:1.5rem;border-top:1px solid var(--gray-300);padding-top:1.5rem}.extracted-faqs h4{margin-bottom:1rem;color:var(--gray-700)}.extracted-faq{background-color:var(--white);padding:1rem;border-radius:var(--border-radius);margin-bottom:1rem;box-shadow:0 .125rem .25rem #00000013}.extracted-faq button{background-color:var(--success-color);color:var(--white);margin-top:.5rem}.extracted-faq button:hover{background-color:#218838}.faq-item{background-color:var(--white);padding:1.5rem;border-radius:var(--border-radius);margin-bottom:1.5rem;box-shadow:0 .125rem .25rem #00000013}.faq-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem}.faq-question{font-weight:600;font-size:1.1rem;color:var(--gray-800);flex:1}.delete-faq{background-color:var(--danger-color);color:var(--white);padding:.25rem .5rem;font-size:.875rem}.delete-faq:hover{background-color:#c82333}.faq-answer{margin-bottom:1rem;line-height:1.6;color:var(--gray-700)}.faq-meta{display:flex;justify-content:space-between;font-size:.875rem;color:var(--gray-600);border-top:1px solid var(--gray-300);padding-top:.75rem}.loading-faqs,.no-faqs{text-align:center;padding:2rem;color:var(--gray-600);font-style:italic}@media (max-width: 576px){.chat-header{flex-direction:column;gap:1rem}.message{max-width:85%}.admin-header{flex-direction:column;gap:1rem;align-items:flex-start}.admin-header button{margin-left:0;margin-right:.5rem}}.drag-drop-uploader{width:100%;margin-bottom:1.5rem}.upload-area{border:2px dashed var(--gray-300);border-radius:var(--border-radius);padding:2rem;text-align:center;cursor:pointer;transition:all .3s ease;background-color:var(--gray-50);display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:200px}.upload-area:hover{border-color:var(--primary-color);background-color:#4361ee0d}.upload-area.dragging{border-color:var(--primary-color);background-color:#4361ee1a;transform:scale(1.02)}.upload-icon{margin-bottom:1rem;color:var(--gray-400)}.upload-area:hover .upload-icon,.upload-area.dragging .upload-icon{color:var(--primary-color)}.upload-text{color:var(--gray-600)}.primary-text{font-size:1.1rem;margin-bottom:.5rem;font-weight:500}.secondary-text{font-size:.9rem}.browse-text{color:var(--primary-color);font-weight:500;text-decoration:underline}.file-input{display:none}.file-preview{display:flex;align-items:center;justify-content:space-between;padding:1rem;border:1px solid var(--gray-200);border-radius:var(--border-radius);background-color:var(--white);margin-bottom:1rem;box-shadow:var(--box-shadow-sm)}.file-info{display:flex;align-items:center;gap:1rem}.file-icon{color:#f40f02;background-color:#f40f021a;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center}.file-details{display:flex;flex-direction:column}.file-name{font-weight:500;color:var(--gray-800);margin:0;max-width:250px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-type{font-size:.8rem;color:var(--gray-500);margin:0}.remove-file{background:none;border:none;color:var(--gray-500);cursor:pointer;padding:.5rem;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.remove-file:hover{background-color:var(--gray-100);color:var(--danger-color)}.upload-button{display:flex;align-items:center;justify-content:center;gap:.5rem;width:100%;padding:.75rem;background:linear-gradient(to right,var(--primary-color),var(--primary-light));color:#fff;border:none;border-radius:var(--border-radius);font-weight:500;cursor:pointer;transition:all .3s ease}.upload-button:hover{transform:translateY(-2px);box-shadow:0 4px 12px #4361ee4d}.upload-button:disabled{background:var(--gray-300);cursor:not-allowed;transform:none;box-shadow:none}.upload-button .spinner{width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.submit-upload{display:none}.extracted-faqs{margin-top:2rem;background-color:var(--gray-50);border-radius:var(--border-radius);padding:1.5rem;border:1px solid var(--gray-200)}.extracted-faqs h4{margin-top:0;margin-bottom:1rem;color:var(--gray-800);display:flex;align-items:center;gap:.5rem}.extracted-faqs h4:before{content:"📄"}.extracted-faq{background-color:var(--white);border-radius:var(--border-radius);padding:1.25rem;margin-bottom:1rem;box-shadow:var(--box-shadow-sm);border-left:3px solid var(--primary-light);transition:all .3s ease}.extracted-faq:hover{transform:translateY(-2px);box-shadow:var(--box-shadow-md)}.extracted-faq:last-child{margin-bottom:0}.extracted-faq .faq-question{font-weight:600;color:var(--gray-800);margin-bottom:.75rem}.extracted-faq .faq-answer{color:var(--gray-600);margin-bottom:.75rem;line-height:1.5}.extracted-faq .faq-keywords{font-size:.85rem;color:var(--gray-500);margin-bottom:1rem}.extracted-faq button{background-color:var(--success-color);color:#fff;border:none;padding:.5rem 1rem;border-radius:var(--border-radius);cursor:pointer;font-size:.9rem;transition:all .2s ease;display:flex;align-items:center;gap:.5rem}.extracted-faq button:before{content:"+";font-weight:700}.extracted-faq button:hover{background-color:var(--success-dark);transform:translateY(-1px)}@media (prefers-color-scheme: dark){.upload-area{background-color:var(--gray-100);border-color:var(--gray-400)}.upload-area:hover,.upload-area.dragging{background-color:#4361ee26;border-color:var(--primary-light)}.upload-icon{color:var(--gray-500)}.upload-text{color:var(--gray-400)}.browse-text{color:var(--primary-light)}.file-preview{background-color:var(--gray-100);border-color:var(--gray-400)}.file-icon{background-color:#f40f0233}.file-name{color:var(--gray-300)}.file-type{color:var(--gray-500)}.remove-file:hover{background-color:var(--gray-300)}.extracted-faqs{background-color:var(--gray-100);border-color:var(--gray-400)}.extracted-faqs h4{color:var(--gray-300)}.extracted-faq{background-color:var(--gray-50);border-left-color:var(--primary-color)}.extracted-faq .faq-question{color:var(--gray-300)}.extracted-faq .faq-answer{color:var(--gray-400)}}@media (max-width: 768px){.upload-area{padding:1.5rem;min-height:150px}.upload-icon svg{width:36px;height:36px}.primary-text{font-size:1rem}.file-preview{flex-direction:column;gap:1rem;align-items:flex-start}.file-info{width:100%}.remove-file{align-self:flex-end;margin-top:-2.5rem}.file-name{max-width:200px}}@media (max-width: 576px){.upload-area{padding:1rem;min-height:120px}.upload-icon svg{width:28px;height:28px}.primary-text{font-size:.9rem}.secondary-text{font-size:.8rem}.file-name{max-width:150px}}.password-group{position:relative}.password-input-container{position:relative;display:flex;align-items:center}.password-input-container input{width:100%;padding-right:40px}.toggle-password{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center;color:var(--gray-500);transition:color .2s ease}.toggle-password:hover{color:var(--gray-700)}.toggle-password svg{width:20px;height:20px}@media (prefers-color-scheme: dark){.toggle-password{color:var(--gray-400)}.toggle-password:hover{color:var(--gray-200)}}