*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased}#root{min-height:100vh}.chat-container{display:flex;flex-direction:column;height:100%;max-height:600px}.chat-messages{flex:1;overflow-y:auto;padding:16px;background:#f5f5f5}.chat-bubble{max-width:75%;padding:10px 14px;border-radius:12px;margin-bottom:10px;line-height:1.5;word-break:break-word;white-space:pre-line}.chat-bubble.user{background:#1890ff;color:#fff;margin-left:auto;border-bottom-right-radius:4px}.chat-bubble.ai{background:#fff;color:#333;margin-right:auto;border-bottom-left-radius:4px;box-shadow:0 1px 2px #0000001a}.chat-bubble.human_agent{background:#52c41a;color:#fff;margin-right:auto;border-bottom-left-radius:4px}.chat-bubble.system{background:#fff7e6;color:#d48806;margin:0 auto;text-align:center;font-size:12px;border-radius:8px}.chat-input-area{display:flex;gap:8px;padding:12px;border-top:1px solid #e8e8e8;background:#fff}.chat-image{max-width:200px;max-height:200px;border-radius:8px;cursor:pointer;display:block;margin-bottom:6px;object-fit:cover}.chat-bubble.user .chat-image{margin-left:auto}.image-preview-bar{display:flex;align-items:center;gap:6px;padding:8px 12px;background:#fafafa;border-top:1px solid #e8e8e8;position:relative}.image-preview-bar img{width:60px;height:60px;object-fit:cover;border-radius:6px;border:1px solid #d9d9d9}.image-preview-remove{position:absolute;top:4px;left:68px;font-size:18px;color:#ff4d4f;cursor:pointer;background:#fff;border-radius:50%}.typing-indicator{display:flex;align-items:center;gap:4px;padding:4px 0}.typing-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background-color:#999;animation:typingBounce 1.4s infinite ease-in-out both}.typing-dot:nth-child(1){animation-delay:0s}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typingBounce{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}