devdocs/assets/stylesheets/pages/_maxcdn.scss

._maxcdn {
  padding-left: 1rem;

  h1, h2, h3 { margin-left: -1rem; }
  h2 { @extend %block-heading; }
  h3 { @extend %block-label, %label-blue; }
  h4 { font-size: 1em; }
  p > code { @extend %label; }

  .url {
    padding: .5rem;
    white-space: normal;
    @extend %pre, %note-green;
  }

  .http_method { @extend %label; }

  .nav-tabs {
    height: 2rem;
    padding: 0;
    list-style: none;
    border-bottom: 1px solid $boxBorder;

    > li {
      float: left;
      margin: -1px 0;

      > a {
        display: block;
        padding: .5rem 1em;
        line-height: 1rem;
        margin-right: 2px;
        border: 1px solid transparent;
        border-radius: 3px 3px 0 0;
      }

      &.active > a {
        color: $textColor;
        text-decoration: none;
        background: $contentBackground;
        border-color: $boxBorder $boxBorder transparent;
        cursor: default;
      }
    }
  }

  .tab-pane { display: none; }
  .tab-pane.active { display: block; }
}