.code-header {
    box-sizing: content-box;
    background-color: #f2f2f2;
    color: #171717;
    display: flex;
    flex-direction: row;
    border: 1px solid #e3e3e3;
    border-bottom: 0;
    margin-top: 16px;
    min-height: 30px;
  }
  
  .tabGroup section[role="tabpanel"] .code-header {
    margin-left: -16px;
    margin-right: -16px;
  }
  
  .tabGroup section[role="tabpanel"] .code-header:first-child {
    margin-top: -16px;
  }
  
  .code-header > .language {
    padding: 2px 16px;
    flex-grow: 1;
    text-transform: uppercase;
    line-height: 26px;
  }
  
  .code-header > .action {
    position: relative;
    padding: 2px 10px;
    background-color: transparent;
    border: 0 solid #e3e3e3;
    border-left-width: 1px;
    color: #171717;
    cursor: pointer;
    display: flex;
    align-items: center;
    line-height: normal;
  }
  
  .code-header .glyphicon {
    margin-right: 0.25em;
  }
  
  .code-header > .action:hover {
    background-color: #fafafa;
  }
  
  .code-header + pre {
    margin-top: 0;
    border: 1px solid #e3e3e3;
  }
  
  .code-header > .action .successful-copy-alert {
    justify-content: center;
    align-items: center;
    right: 0;
    left: 0;
    bottom: 0;
    top: 0;
    position: absolute;
    display: flex;
    background-color: #128712;
    outline-color: #fff;
    color: #fff;
  }
  
  .code-header > .action .successful-copy-alert.is-transparent {
    opacity: 0;
    transition: 500ms opacity ease-in-out;
  }