1.wp-block-audio{
  2  box-sizing:border-box;
  3}
  4.wp-block-audio :where(figcaption){
  5  margin-bottom:1em;
  6  margin-top:.5em;
  7}
  8.wp-block-audio audio{
  9  min-width:300px;
 10  width:100%;
 11}