piechart.css

*{
  margin: 0;
  padding: 0;
  list-style: none;
}

.piechart-outer{
  background: #fff;
  border-radius: 50%;
}

.piechart-item{
  display: block;
  position: absolute;
  margin-right: -1px;
  border-radius: 50%;
}
.piechart-filled{
  display: block;
  position: absolute;
  border-radius: 50%;
  -webkit-backface-visibility: hidden;
}

.piechart-overhalf{
  -webkit-transform: rotate(0deg);
  -moz-transform: rotate(0deg);
  -o-transform: rotate(0deg);
  transform: rotate(0deg);
  display: none;
}
.piechart-overhalf .piechart-filled{
  -webkit-transform: rotate(180deg);
  -moz-transform: rotate(180deg);
  -o-transform: rotate(180deg);
  transform: rotate(180deg);
}

.piechart-item{
  -webkit-transform: rotate(0deg);
  -moz-transform: rotate(0deg);
  -o-transform: rotate(0deg);
  transform: rotate(0deg);
}
.piechart-item .piechart-filled{
  -webkit-transform: rotate(0deg);
  -moz-transform: rotate(0deg);
  -o-transform: rotate(0deg);
  transform: rotate(0deg);
}

.piechart-inner{
  position: relative;
  margin: -240px auto 0 auto;
  background: #fff;
  text-align: center;
  overflow: hidden;
  z-index: 10;
  border-radius: 50%;
}