/* ==========================================================================
   Helper classes from http://html5boilerplate.com/
   ========================================================================== */

/*
 * Hide from both screenreaders and browsers: h5bp.com/u
 */

.hidden {
  display: none !important;
  visibility: hidden;
}

/*
 * Hide only visually, but have it available for screenreaders: h5bp.com/v
 */

.visuallyhidden {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

/*
 * Extends the .visuallyhidden class to allow the element to be focusable
 * when navigated to via the keyboard: h5bp.com/p
 */

.visuallyhidden.focusable:active,
.visuallyhidden.focusable:focus {
  clip: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  position: static;
  width: auto;
}

/*
 * Hide visually and from screenreaders, but maintain layout
 */

.invisible {
  visibility: hidden;
}