.app{width:100%;max-width:1200px;margin:0 auto}.container{background:#fff;border-radius:20px;box-shadow:0 20px 60px #0000004d;overflow:hidden}.header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:30px;text-align:center}.header h1{font-size:2.5rem;margin-bottom:10px;font-weight:700}.header p{font-size:1.1rem;opacity:.9}@media(max-width:768px){.header h1{font-size:2rem}}.chat-interface{display:flex;flex-direction:column;height:600px}.messages-container{flex:1;overflow-y:auto;padding:20px;background:#f8f9fa}.welcome-message{text-align:center;padding:60px 20px;color:#6c757d}.welcome-message h2{font-size:2rem;margin-bottom:15px;color:#495057}.message{margin-bottom:20px;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message-content{display:flex;gap:12px;align-items:flex-start}.message.user .message-content{flex-direction:row-reverse}.message-avatar{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;flex-shrink:0;background:#fff;box-shadow:0 2px 8px #0000001a}.message-text{max-width:70%}.message.user .message-text{text-align:right}.message-body{padding:15px 20px;border-radius:18px;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}.message.user .message-body{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-bottom-right-radius:4px}.message.assistant .message-body{background:#fff;color:#212529;border-bottom-left-radius:4px;box-shadow:0 2px 8px #00000014}.message-time{font-size:.75rem;color:#6c757d;margin-top:5px;padding:0 5px}.typing-indicator{display:flex;gap:4px;padding:15px 20px;background:#fff;border-radius:18px 18px 18px 4px}.typing-indicator span{width:8px;height:8px;border-radius:50%;background:#667eea;animation:typing 1.4s infinite}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.7}30%{transform:translateY(-10px);opacity:1}}.input-form{display:flex;gap:10px;padding:20px;background:#fff;border-top:1px solid #e9ecef}.input-field{flex:1;padding:15px 20px;border:2px solid #dee2e6;border-radius:25px;font-size:1rem;outline:none;transition:border-color .3s ease}.input-field:focus{border-color:#667eea}.send-button{width:50px;height:50px;border:none;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:1.5rem;cursor:pointer;transition:all .3s ease}.send-button:hover:not(:disabled){transform:scale(1.05);box-shadow:0 4px 12px #667eea66}.send-button:disabled{opacity:.5;cursor:not-allowed}.messages-container::-webkit-scrollbar{width:8px}.messages-container::-webkit-scrollbar-track{background:#f1f1f1}.messages-container::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.mode-selector{display:flex;gap:10px;padding:20px;background:#f8f9fa;border-bottom:1px solid #e9ecef;overflow-x:auto}.mode-btn{flex:1;min-width:140px;padding:15px;border:2px solid #dee2e6;border-radius:12px;background:#fff;cursor:pointer;transition:all .3s ease;text-align:center}.mode-btn:hover{border-color:#667eea;transform:translateY(-2px);box-shadow:0 4px 12px #667eea33}.mode-btn.active{border-color:#667eea;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;box-shadow:0 4px 12px #667eea4d}.mode-label{font-size:1.1rem;font-weight:600;margin-bottom:5px}.mode-desc{font-size:.85rem;opacity:.8}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh}#root{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}