.debug-content {

  &.is-enabled {
    .debug-toggle-link {
      color: @openstax-neutral;
    }
    .visible-when-debugging {
      display: block;
    }
  }

  .visible-when-debugging {
    display: none;
  }

  .debug-toggle-link {
    position: fixed;
    bottom: 0px;
    left: 0px;
    z-index: 10; // overlay navbar
    line-height: 1.5rem;
    font-size: 1.5rem;
    color: transparent;
    &:hover { color: @openstax-neutral; }
  }
}

.debug-content {

  &.is-enabled {
    .debug-toggle-link {
      color: @openstax-neutral;
    }
    .visible-when-debugging {
      display: block;
      border: 1px solid;
      padding: 5px;
      border-radius: 4px;
      margin: 5px 0;
     }
  }

  .visible-when-debugging {
    display: none;
  }

  .debug-toggle-link {
    position: fixed;
    bottom: 0px;
    left: 0px;
    z-index: 10; // overlay navbar
    line-height: 1.5rem;
    font-size: 1.5rem;
    color: transparent;
    &:hover { color: @openstax-neutral; }
  }
}

Apply some default styles to content
Apply some default styles to content
