.app{display:flex;flex-direction:row;height:100vh}.plot-container{flex:1;position:relative}.control-panel{width:250px;padding:10px;background-color:#f7f7f7;border-left:1px solid #ccc;overflow-y:auto}.worldline-control{margin-bottom:20px}.worldline-control button{margin-right:10px;padding:5px 10px}