figure img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

figcaption p {
  text-align: center;
}

div.highlight {
  background-color: #1e1e1e;  
  border-radius: 6px;
}

div.highlight code {
  background-color: transparent;  
  border: none;
}

div.highlight pre {
  background-color: transparent !important; 
}