audio {
  display: block;
  margin: 2rem auto;
  width: 100%;
  max-width: 100%;
  background-color: #000;
  border: 2px solid #ff6666;
  border-radius: 8px;
}

hr {
  border: 0;
  border-top: 2px dashed #ff6666;
  margin: 2rem auto;
  width: 80%;
}

@media (max-width: 768px) {
  .container,
  .nested-container {
    padding: 1rem;
  }
}