*{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}.app{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.chat-container{width:100%;max-width:800px;height:90vh;background:#fff;border-radius:16px;box-shadow:0 20px 60px #0000004d;display:flex;flex-direction:column;overflow:hidden}.chat-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px;display:flex;justify-content:space-between;align-items:center}.chat-header h1{font-size:1.5rem;font-weight:600}.clear-button{background:#fff3;color:#fff;border:1px solid rgba(255,255,255,.3);padding:8px 16px;border-radius:20px;cursor:pointer;font-size:.9rem;transition:all .3s ease}.clear-button:hover{background:#ffffff4d}.chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px}.chat-welcome{text-align:center;padding:40px 20px}.chat-welcome h2{color:#333;margin-bottom:10px}.chat-welcome p{color:#666;margin-bottom:30px}.example-prompts{display:flex;flex-direction:column;gap:10px;max-width:400px;margin:0 auto}.example-prompts button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 20px;border-radius:8px;cursor:pointer;font-size:.95rem;transition:transform .2s ease,box-shadow .2s ease}.example-prompts button:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.chat-message{display:flex;margin-bottom:12px}.chat-message.user{justify-content:flex-end}.chat-message.assistant{justify-content:flex-start}.message-bubble{max-width:70%;padding:12px 16px;border-radius:16px;position:relative}.chat-message.user .message-bubble{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-bottom-right-radius:4px}.chat-message.assistant .message-bubble{background:#f0f0f0;color:#333;border-bottom-left-radius:4px}.message-text{line-height:1.5;white-space:pre-wrap;word-wrap:break-word}.message-time{font-size:.75rem;opacity:.7;margin-top:4px}.chat-message.loading .message-bubble{display:flex;align-items:center;gap:10px}.spinner{width:20px;height:20px;border:3px solid #f0f0f0;border-top:3px solid #667eea;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.chat-error{background:#fee;color:#c33;padding:12px;border-radius:8px;display:flex;align-items:center;gap:8px;border-left:4px solid #c33}.chat-input-container{padding:20px;background:#f9f9f9;border-top:1px solid #eee;display:flex;gap:12px}.chat-input{flex:1;padding:12px;border:2px solid #ddd;border-radius:8px;font-size:1rem;font-family:inherit;resize:none;transition:border-color .3s ease}.chat-input:focus{outline:none;border-color:#667eea}.chat-input:disabled{background:#f5f5f5;cursor:not-allowed}.send-button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 24px;border-radius:8px;cursor:pointer;font-size:1rem;font-weight:600;transition:transform .2s ease,box-shadow .2s ease}.send-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}.send-button:disabled{background:#ccc;cursor:not-allowed;transform:none}.chat-messages::-webkit-scrollbar{width:8px}.chat-messages::-webkit-scrollbar-track{background:#f1f1f1}.chat-messages::-webkit-scrollbar-thumb{background:#888;border-radius:4px}.chat-messages::-webkit-scrollbar-thumb:hover{background:#555}@media (max-width: 768px){.chat-container{height:100vh;border-radius:0}.chat-header h1{font-size:1.2rem}.message-bubble{max-width:85%}.example-prompts{max-width:100%}}