*{margin:0;padding:0;box-sizing:border-box}.App{display:flex;flex-direction:column;height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.App-header{background:#fffffff2;padding:20px;text-align:center;box-shadow:0 2px 10px #0000001a;position:relative}.App-header h1{color:#333;margin:0;font-size:1.8rem}.subtitle{color:#666;font-size:.9rem;margin-top:5px}.reset-button{position:absolute;top:20px;right:20px;padding:8px 16px;background:#667eea;color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:.9rem;transition:all .3s ease}.reset-button:hover{background:#5568d3;transform:translateY(-2px);box-shadow:0 4px 8px #0003}.chat-window{flex:1;display:flex;flex-direction:column;max-width:900px;width:100%;margin:20px auto;background:#fff;border-radius:16px;box-shadow:0 8px 32px #0000001a;overflow:hidden}.messages-container{flex:1;overflow-y:auto;padding:20px;background:#f8f9fa}.welcome-message{text-align:center;padding:40px 20px;color:#666}.welcome-message h2{color:#333;margin-bottom:10px}.tip{margin-top:20px;padding:12px;background:#fff3cd;border-radius:8px;border-left:4px solid #ffc107;font-size:.9rem}.message{margin-bottom:16px;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message-content{display:flex;align-items:flex-start;gap:12px}.message-icon{font-size:1.5rem;flex-shrink:0}.message.user{display:flex;justify-content:flex-end}.message.user .message-content{flex-direction:row-reverse;background:#667eea;color:#fff;padding:12px 16px;border-radius:18px 18px 4px;max-width:70%;box-shadow:0 2px 8px #667eea4d}.message.bot .message-content{background:#fff;padding:12px 16px;border-radius:18px 18px 18px 4px;max-width:70%;box-shadow:0 2px 8px #0000001a}.message p{margin:0;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}.typing-indicator{display:flex;gap:4px;padding:8px}.typing-indicator span{width:8px;height:8px;background:#667eea;border-radius:50%;animation:bounce 1.4s infinite ease-in-out}.typing-indicator span:nth-child(1){animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.input-container{display:flex;padding:20px;background:#fff;border-top:1px solid #e0e0e0}.input-container input{flex:1;padding:14px 16px;border:2px solid #e0e0e0;border-radius:24px;font-size:1rem;outline:none;transition:border-color .3s ease}.input-container input:focus{border-color:#667eea}.input-container input:disabled{background:#f5f5f5;cursor:not-allowed}.input-container button{margin-left:12px;padding:14px 24px;background:#667eea;color:#fff;border:none;border-radius:24px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;white-space:nowrap}.input-container button:hover:not(:disabled){background:#5568d3;transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.input-container button:disabled{background:#ccc;cursor:not-allowed;transform:none}.input-container button.loading{animation:pulse 1.5s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.messages-container::-webkit-scrollbar{width:8px}.messages-container::-webkit-scrollbar-track{background:#f1f1f1}.messages-container::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.messages-container::-webkit-scrollbar-thumb:hover{background:#555}@media(max-width:768px){.chat-window{margin:10px;border-radius:12px}.App-header h1{font-size:1.4rem}.reset-button{position:static;margin-top:10px;width:100%}.message.user .message-content,.message.bot .message-content{max-width:85%}}