figure.caption {
  text-align: center;
}

.caption > * {
  padding: 0;
  margin: 0;
  background: none;
  border: none;
}

.caption > figcaption {
  background: lightgoldenrodyellow;
  margin: 0 auto;
  padding: 0 2em;
  display: inline-block;
  border-bottom-left-radius: 2em;
  border-bottom-right-radius: 2em;
  -webkit-box-shadow: 1px 0px 5px 0px rgba(0,0,0,0.75);
  -moz-box-shadow: 1px 0px 5px 0px rgba(0,0,0,0.75);
  box-shadow: 1px 0px 5px 0px rgba(0,0,0,0.75);
}