*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px}#root{width:100%;height:100%;display:flex;justify-content:center;align-items:center}.app{width:100%;display:flex;justify-content:center;align-items:center}.container{width:100%;max-width:800px;height:90vh;background:#fff;border-radius:20px;box-shadow:0 20px 60px #0000004d;display:flex;flex-direction:column;overflow:hidden}.header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:20px;text-align:center}.header h1{font-size:24px;margin-bottom:5px}.header p{font-size:14px;opacity:.9}.api-key-section{padding:15px 20px;background:#f8f9fa;border-bottom:1px solid #e0e0e0;display:flex;gap:10px;align-items:center}.api-key-section input{flex:1;padding:10px;border:1px solid #ddd;border-radius:8px;font-size:14px}.api-key-section button{padding:10px 20px;background:#667eea;color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:14px;transition:background .3s}.api-key-section button:hover{background:#5568d3}.api-key-section .status{width:12px;height:12px;border-radius:50%;background:#ccc}.api-key-section .status.active{background:#4caf50}.messages{flex:1;overflow-y:auto;padding:20px;background:#f5f5f5}.message{margin-bottom:15px;display:flex;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{justify-content:flex-end}.message-content{max-width:70%;padding:12px 16px;border-radius:18px;word-wrap:break-word;white-space:pre-wrap}.message.user .message-content{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-bottom-right-radius:4px}.message.assistant .message-content{background:#fff;color:#333;border-bottom-left-radius:4px;box-shadow:0 2px 5px #0000001a}.message.system{justify-content:center}.message.system .message-content{background:#fff3cd;color:#856404;border-radius:8px;font-size:13px;max-width:90%;text-align:center}.message.error .message-content{background:#f8d7da;color:#721c24;max-width:90%}.typing-indicator{padding:12px 16px;background:#fff;border-radius:18px;width:fit-content;box-shadow:0 2px 5px #0000001a;display:flex;gap:4px}.typing-indicator span{display:inline-block;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)}30%{transform:translateY(-10px)}}.input-section{padding:20px;background:#fff;border-top:1px solid #e0e0e0}.input-container{display:flex;gap:10px}.input-container textarea{flex:1;padding:12px;border:2px solid #e0e0e0;border-radius:12px;font-size:15px;font-family:inherit;resize:none;min-height:50px;max-height:120px;transition:border-color .3s}.input-container textarea:focus{outline:none;border-color:#667eea}.input-container textarea:disabled{background:#f5f5f5;cursor:not-allowed}.input-container button{padding:12px 30px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:12px;cursor:pointer;font-size:15px;font-weight:600;transition:transform .2s,box-shadow .2s}.input-container button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 5px 15px #667eea66}.input-container button:disabled{opacity:.6;cursor:not-allowed}.clear-button{margin-top:10px;padding:8px 16px;background:#6c757d;color:#fff;border:none;border-radius:8px;cursor:pointer;font-size:13px;width:100%;transition:background .3s}.clear-button:hover{background:#5a6268}