html {
  height: 100%;
}
body {
  height: 100%;
  font: 16px sans-serif;
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
.container {
  height: 100%;
  display: flex;
  flex-direction: column;
  background-color: #f9f2f4;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-sizing: border-box;
}
.tabs {
  flex: 0 1 auto;
  margin: 0;
  padding: 2px 5px 0 5px;
  list-style: none;
  background: #ddd;
}
.tabs .tab {
  display: inline-block;
  padding: 5px 20px;
  cursor: pointer;
  font-weight: bold;
  border-top-left-radius: 5px;
  border-top-right-radius: 5px;
  color: #888;
  border-top: 1px solid #aaa;
  border-left: 1px solid #aaa;
  border-right: 1px solid #aaa;
}
.tabs .tab.selected {
  color: #000;
  background-color: #f9f2f4;
}
.demo {
  flex: 1 0 auto;
  position: relative;
}
.demo d3fc-canvas.plot-area {
  display: none;
}
pre {
  margin: 0;
}
.code {
  flex: 1 1 auto;
  overflow: auto;
}