*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:#f5f5f5}.chat-container{max-width:500px;margin:20px auto;background:#fff;border-radius:12px;box-shadow:0 2px 12px #0000001a;display:flex;flex-direction:column;height:calc(100vh - 40px);overflow:hidden}.chat-header{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:16px 20px;display:flex;justify-content:space-between;align-items:center}.chat-header h2{font-size:18px;font-weight:600}.chat-header .status{font-size:12px;opacity:.9}.chat-header .status.transferred{background:#ffc107;color:#333;padding:4px 8px;border-radius:12px;font-weight:500}.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.message{max-width:80%;padding:12px 16px;border-radius:16px;line-height:1.5;word-wrap:break-word;white-space:pre-wrap}.message.user{align-self:flex-end;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-bottom-right-radius:4px}.message.ai,.message.agent{align-self:flex-start;background:#f0f0f0;color:#333;border-bottom-left-radius:4px}.message.agent{background:#e3f2fd;border-left:3px solid #2196f3}.message .sender{font-size:11px;opacity:.7;margin-bottom:4px}.message .time{font-size:10px;opacity:.6;margin-top:4px;text-align:right}.chat-input-area{padding:16px;border-top:1px solid #eee;background:#fff}.chat-actions{display:flex;gap:8px;margin-bottom:12px}.btn{padding:8px 16px;border:none;border-radius:20px;cursor:pointer;font-size:13px;font-weight:500;transition:all .2s}.btn-transfer{background:#ff9800;color:#fff}.btn-transfer:hover{background:#f57c00}.btn-transfer:disabled{background:#ccc;cursor:not-allowed}.btn-close{background:#f44336;color:#fff}.btn-close:hover{background:#d32f2f}.chat-input-form{display:flex;gap:12px}.chat-input{flex:1;padding:12px 16px;border:1px solid #ddd;border-radius:24px;font-size:14px;outline:none;transition:border-color .2s}.chat-input:focus{border-color:#667eea}.chat-input:disabled{background:#f5f5f5}.btn-send{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:12px 24px;border:none;border-radius:24px;cursor:pointer;font-weight:600;transition:transform .2s,box-shadow .2s}.btn-send:hover{transform:translateY(-1px);box-shadow:0 4px 12px #667eea66}.btn-send:disabled{background:#ccc;cursor:not-allowed;transform:none;box-shadow:none}.session-closed{text-align:center;padding:40px;color:#666}.session-closed h3{margin-bottom:16px;color:#333}.btn-new-session{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:12px 32px;border:none;border-radius:24px;cursor:pointer;font-weight:600;font-size:14px}.loading{display:flex;justify-content:center;align-items:center;height:100%;color:#666}.typing-indicator{display:flex;gap:4px;padding:12px 16px;background:#f0f0f0;align-self:flex-start;border-radius:16px 16px 16px 4px}.typing-indicator span{width:8px;height:8px;background:#999;border-radius:50%;animation:typing 1.4s infinite ease-in-out}.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)}}