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// element-invisible as defined by http://snook.ca/archives/html_and_css/hiding-content-for-accessibility
@mixin element-invisible {
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  @if $legacy-support-for-ie6 or $legacy-support-for-ie7 {
    clip: rect(1px 1px 1px 1px); // IE6 and IE7 use the wrong syntax.
  }
  clip: rect(1px, 1px, 1px, 1px);
}


// Turns off the element-invisible effect.
@mixin element-invisible-off {
  position: static !important;
  clip: auto;
  height: auto;
  width: auto;
  overflow: auto;
}


@mixin element-focusable {
  @include element-invisible;

  &:active,
  &:focus {
    @include element-invisible-off;
  }
}