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ease;flex-shrink:0}.delete-btn:hover{color:#d32f2f;background:#ffebee;transform:scale(1.1)}.empty-state{text-align:center;padding:60px 20px;color:#666}.empty-icon{font-size:48px;margin-bottom:16px}.empty-state h4{margin:0 0 8px;color:#333}.empty-state p{margin:0}.loading{padding:40px;text-align:center;color:#666;font-size:16px}.error-message{padding:40px;text-align:center;color:#d32f2f}.retry-btn{margin-left:12px;padding:4px 12px;border:1px solid #d32f2f;border-radius:4px;background:#fff;color:#d32f2f;cursor:pointer}.retry-btn:hover{background:#d32f2f;color:#fff}@media (max-width: 768px){.sidebar{position:absolute;height:100%;z-index:100;box-shadow:2px 0 10px #0000001a}.sidebar.collapsed{margin-left:-300px}.main-content{margin-left:0}.panel-tabs{flex-direction:column}.tab-btn{border-bottom:none;border-right:3px solid transparent}.tab-btn.active{border-bottom:none;border-right-color:#007bff}}