body {
  font-family: 'Trebuchet MS', Arial, sans-serif;
  font-size: 0.8em;
  margin: 0;
  display: flex;
  flex-direction: column;
}

html,
body {
  height: 100%;
}

#topbar {
  background: #555;
  color: #fff;
  height: 23px;
  padding: 7px;
}

#datasets {
  background: #555;
  height: 100%;
  width: 250px;
}

#chart-container {
  height: 80%;
  width: 100%;
}

#wrapper {
  display: flex;
  height: 100%;
}

#toggleButton {
  float: right;
}

details {
  background: #777;
}

summary {
  background: #444444;
  cursor: pointer;
  font-weight: bold;
  padding: 5px 10px;
}

details label {
  cursor: pointer;
  display: block;
  padding: 2px 10px;
}