.areachart{position:relative}.arc{cursor:pointer}.hovered{position:absolute;padding:5px 10px;background-color:#fff;-webkit-box-shadow:0 0 5px #cfcfcf;box-shadow:0 0 5px #cfcfcf;-webkit-transform:translate(-50%);transform:translate(-50%);pointer-events:none;line-height:1.6;width:240px}#app{width:1000px;margin:auto;text-align:center}.description{width:600px;line-height:2;margin:20px auto}.area-container{position:relative}.area-title{position:absolute;left:65px}.histograms{display:inline-block}