.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
}
.controls {
  margin: 20px 0;
}
button {
  margin: 5px;
  padding: 10px 20px;
}
#audioPreview {
  width: 100%;
  margin: 20px 0;
}
span.small {
  font-size: smaller;
}
td.menu {
  vertical-align: top;
}
td.usage {
  vertical-align: top;
}