*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-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}.app-container{min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px}.chat-container{width:100%;max-width:900px;height:90vh;background:#fff;border-radius:20px;box-shadow:0 20px 60px #0000004d;display:flex;flex-direction:column;overflow:hidden}.chat-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:25px 30px;display:flex;justify-content:space-between;align-items:center}.chat-header h1{font-size:24px;font-weight:700;display:flex;align-items:center;gap:10px}.clear-button{background:#fff3;border:1px solid rgba(255,255,255,.3);color:#fff;padding:10px 20px;border-radius:10px;cursor:pointer;font-weight:600;transition:all .3s ease;font-size:14px}.clear-button:hover{background:#ffffff4d;transform:translateY(-2px)}.messages-container{flex:1;overflow-y:auto;padding:30px;background:#f8f9fa}.message{margin-bottom:20px;display:flex;gap:15px;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message-avatar{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;flex-shrink:0}.user-avatar{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.agent-avatar{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff}.message-content{flex:1;background:#fff;padding:15px 20px;border-radius:15px;box-shadow:0 2px 10px #0000000d}.message.user .message-content{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.message.agent .message-content{background:#fff;color:#333}.message-role{font-weight:600;font-size:12px;text-transform:uppercase;margin-bottom:8px;opacity:.8}.message-text{line-height:1.6;white-space:pre-wrap;word-wrap:break-word}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:#999;text-align:center}.empty-state-icon{font-size:80px;margin-bottom:20px}.empty-state h2{font-size:28px;margin-bottom:10px;color:#666}.empty-state p{font-size:16px;color:#999}.input-container{padding:25px 30px;background:#fff;border-top:1px solid #e0e0e0}.input-form{display:flex;gap:15px}.input-wrapper{flex:1;position:relative}.input-field{width:100%;padding:15px 20px;border:2px solid #e0e0e0;border-radius:12px;font-size:16px;font-family:inherit;transition:all .3s ease;outline:none}.input-field:focus{border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.input-field:disabled{background:#f5f5f5;cursor:not-allowed}.send-button{padding:15px 30px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:12px;font-weight:600;font-size:16px;cursor:pointer;transition:all .3s ease;min-width:120px}.send-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 5px 20px #667eea66}.send-button:disabled{opacity:.6;cursor:not-allowed;transform:none}.typing-indicator{display:flex;gap:5px;padding:10px 0}.typing-dot{width:8px;height:8px;background:#999;border-radius:50%;animation:typing 1.4s infinite}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-10px)}}.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-container{height:100vh;border-radius:0}.chat-header h1{font-size:20px}.messages-container{padding:20px 15px}.input-container{padding:15px}.send-button{min-width:80px;padding:15px 20px}}