er-width: 1px 1px 0 1px;
  background-color: #ddd;
  display: none;
}

#shortcuts-help.active {
  display: block;
}

#shortcuts-help ul {
  padding: 0;
}

#shortcuts-help li {
  display: flex;
  justify-content: space-between;
}

#shortcuts-help code {
  padding: 3px 10px;
  border-radius: 3px;
  border-width: 1px 1px 0 1px;
  border-color: #bbb;
  background-color: #eee;
  box-shadow: inset 0 -1px 0 #ccc;
}
</style></head><body><div id="shortcuts-help">
<ul>
  <li><span>Toggle shortcuts help</span><code>?<