.audio-card {
  background: #f8f8f8;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  margin-bottom: 20px;
  text-align: center;
}
.custom-audio {
  width: 100%;
  margin: 10px 0;
}
.speed-control {
  margin-top: 5px;
  padding: 5px;
  border-radius: 4px;
}