EDIT

/**

 * @file

 * Wireframes Styling

 *

 * Add wireframes to the basic layout elements.

 */

@import "base";

.with-wireframes {

  #header,

  #main,

  #content,

  #navigation,

  .region-sidebar-first,

  .region-sidebar-second,

  #footer,

  .region-bottom {

    outline: 1px solid #ccc;

    @if $legacy-support-for-ie6 or $legacy-support-for-ie7 {

      .lt-ie8 & {

        border: 1px solid #ccc; /* IE6/7 do not support the outline property. */

      }

    }

  }

}