*{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;overflow:hidden;position:fixed;-webkit-overflow-scrolling:touch}:root{--send-button-color: #4a90e2;--agent-message-bg-color: #f1f3f5;--overall-bg-color: #ffffff}.chat-component{display:flex;flex-direction:column;height:100vh;height:100dvh;width:100vw;width:100dvw;max-width:100%;background-color:var(--overall-bg-color);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow:hidden;position:relative}.chat-header{padding:16px 20px;background-color:var(--overall-bg-color);border-bottom:1px solid #e1e4e8}.chat-header h2{font-size:18px;font-weight:600;color:var(--send-button-color)}.conversation-history{flex:1;overflow-y:auto;padding:20px;background-color:var(--overall-bg-color);display:flex;flex-direction:column;gap:12px}.message{display:flex;width:100%}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.message-content{max-width:70%;padding:10px 14px;border-radius:12px;word-wrap:break-word;white-space:pre-wrap}.message.user .message-content{background-color:var(--send-button-color);color:#fff;border-bottom-right-radius:4px}.message.assistant .message-content{background-color:var(--agent-message-bg-color);color:#24292e;border-bottom-left-radius:4px}.typing-indicator{display:inline-flex;align-items:center;gap:4px;padding:10px 14px;background-color:var(--agent-message-bg-color);border-radius:12px 12px 12px 4px;align-self:flex-start}.typing-indicator .dot{width:8px;height:8px;background-color:#8c959f;border-radius:50%;animation:typing 1.4s infinite}.typing-indicator .dot:nth-child(1){animation-delay:0s}.typing-indicator .dot:nth-child(2){animation-delay:.2s}.typing-indicator .dot:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}.error-message{padding:12px 20px;background-color:#fff3cd;border-top:1px solid #ffc107;color:#856404;font-size:14px}.input-area{padding:16px 20px;background-color:var(--overall-bg-color);border-top:1px solid #e1e4e8;display:flex;gap:12px;align-items:flex-end}.input-textarea{flex:1;padding:10px 12px;border:1px solid #d1d5db;border-radius:8px;font-size:16px;font-family:inherit;resize:none;outline:none;transition:border-color .2s}.input-textarea:focus{border-color:var(--send-button-color)}.input-textarea:disabled{background-color:#f1f3f5;cursor:not-allowed}.send-button{padding:10px 20px;background-color:var(--send-button-color);color:#fff;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:background-color .2s;white-space:nowrap}.send-button:hover:not(:disabled){filter:brightness(.85)}.send-button:disabled{background-color:#d1d5db;opacity:.5;cursor:not-allowed}.conversation-history::-webkit-scrollbar{width:8px}.conversation-history::-webkit-scrollbar-track{background:#f1f3f5}.conversation-history::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:4px}.conversation-history::-webkit-scrollbar-thumb:hover{background:#9ca3af}@media (max-width: 768px){.message-content{max-width:85%}.input-area{flex-direction:column;align-items:stretch}.send-button{width:100%}}