body {
  font-family: "Gill Sans", sans-serif;
}

.container {
  width: 960px;
  margin: 0 auto;
}

.clearfix {
  clear: both;
}

.main-title {
  font-size: 38px;
  text-align: center;
}

.main-description {
  font-size: 23px;
  text-align: center;
}

.main-footer {
  text-align: center;
  padding: 20px 0 30px;
}

.main-footer a {
  color: rgb(65, 131, 196);
}

.pie-charts-item {
  float: left;
  width: 25%;
}

.plot-charts-item {
  width: 480px;
  float: left;
  height: 298px;
  margin-bottom: 40px;
}

.plot-charts-item-caption {
  font-size: 16px;
  line-height: 18px;
  text-align: center;
}

.plot-charts-item-graph {
  height: 280px;
}