pre.CodeBlock {
  background-color: #ffff99 ! important;
}

pre code {
  font-size: 1.1em ! important;
  background-color: #ffff99 ! important;
  border: 0px solid #000 ! important;
  padding: 2px ! important;
}

code {
  background-color: #ffffdd ! important;
  border: 1px solid #000 ! important;
  padding: 2px ! important;
}