.reveal pre, .codeblock {
  width: 100%; }

.codeblock {
  margin: 20px auto;
  position: relative; }

.codeblock pre {
  margin: 0;
  width: 100%;
  font-size: 1.5rem; }

.codeblock > button {
  opacity: 0.5;
  z-index: 1;
  display: block;
  position: absolute;
  right: 0;
  top: 0;
  background: orange;
  color: black;
  border: 0;
  margin: 0;
  padding: .2em .5em;
  font-family: inherit;
  font-size: 1.5rem;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-transition: background-color 0.25s ease-in-out, opacity .25s ease-in-out;
  -o-transition: background-color 0.25s ease-in-out, opacity .25s ease-in-out;
  transition: background-color 0.25s ease-in-out, opacity .25s ease-in-out;
  cursor: pointer; }

.codeblock > button:hover, pre > button:hover {
  opacity: 1; }

.codeblock > button[disabled] {
  opacity: 1;
  background: green;
  color: white;
  cursor: default; }

.codeblock > button:focus {
  outline: 0; }