body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin-top: 50px;
}

button, a {
  margin: 10px;
  padding: 10px 20px;
  font-size: 16px;
}

audio {
  display: block;
  margin: 20px auto;
}

#equalizer {
  width: 100%;
  max-width: 600px;
  height: 150px;
  margin: 20px auto;
  background-color: #000;
}