index.css

body {
  margin: 0;
  padding: 0;
  border: 0;
  display: inline-flex;
}

.track-button {
  font-size: 4em;
  color: #58595B;
  border-width: .1em;
  border-color: #F26522;
  border-style: solid;
  border-radius: .3em;
  padding: .1em;
  margin: .1em;
}

.track-button:hover {
  background: #DDDDDD;
}

#track-navigation {
  overflow-x: hidden;
  overflow-y: auto;
  padding-right: 1em;
  display: inline-block;
}

#course-tree {
  background: white;
  overflow: auto;
  text-align: center;
}

#course-tree svg text {
  font-family: FontAwesome;
  stroke: #58595B;
  fill: #58595B;
}

#course-tree svg rect {
  stroke: #F26522;
  fill: #FFFFFF;
}

#course-tree svg g {
  fill: #FFFFFF;
}

#course-tree svg line {
  stroke: #AAAAAA;
}

#course-description {
}

.description-box {
  border-width: .1em;
  border-color: #F26522;
  border-style: solid;
  border-radius: .3em;
  font-size: 4em;
}

.description-padding {
  padding: .1em;
}

.description-heading {
  font-size: .4em;
  padding: .5em;
  text-align: center;
}

.description-content {
  font-size: .3em;
  padding: .5em;
}