body {
  background: #fafafa;
  font-family: "Roboto","Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #222;
}

.tab-panels ul {
  margin: 0;
  padding: 0;
}

.tab-panels ul li {
  list-style-type: none;
  display: inline-block;
  background: #999;
  margin: 0;
  padding: 3px 10px;
  border-radius: 10px 10px 0 0;
  color: #fff;
  font-weight: 200;
  cursor: pointer;
}

.tab-panels ul li:hover {
  color: #fff;
  background: #666;
}

.tab-panels ul li.active {
  color: #fff;
  background: #666;
}

.tab-panels .panel {
  display: none;
  background: #c9c9c9;
  padding: 30px;
  border-radius: 0 0 10px 10px;
}

.tab-panels .panel.active { display: block; }