.highlight {
  position: relative;
}

.highlight pre {
  padding-right: 75px;
}

.highlight-copy-btn {
  position: absolute;
  top: 7px;
  right: 7px;
  border: 0;
  border-radius: 4px;
  padding: 6px;
  font-size: 12px;
  line-height: 20px;
  cursor: pointer;
  background-color: transparent;
  color: #b1bac4;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

.highlight:hover .highlight-copy-btn {
  opacity: 1;
}

.highlight-copy-btn:hover {
  background-color: #49515a;
}

.highlight-copy-btn:focus,
.highlight-copy-btn:active {
  outline: 0;
  opacity: 1;
}