pre {
  width: 90%;
  margin: 0 auto;
}

.hljs-focus.focused {
  border-left: 2px solid #78e08f55;
  background: #78e08f05;
  padding: 2px;
  padding-left: 10px;
}

.hljs-focus.unfocused {
  border-left: 2px solid transparent;
  padding-left: 10px;
  opacity: 0.5;
  filter: grayscale(1);
}