body {
  font-family: 'RocknRoll One', sans-serif;
  margin: 0;
  padding: 0;
  background: #fff;
  color: #333;
}
header {
  background: #111;
  color: white;
  padding: 3em 1em;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 2.5em;
}
section {
  padding: 2em;
  max-width: 800px;
  margin: auto;
}
section h2 {
  border-left: 5px solid #007acc;
  padding-left: 0.5em;
  color: #007acc;
  margin-top: 1.5em;
}
#trackList li {
  cursor: pointer;
}
#trackList li:hover {
  background: #eef;
}
audio {
  width: 100%;
  margin: 1em 0;
}
footer {
  background: #111;
  color: white;
  padding: 3em 1em;
  text-align: center;
}