.ir {
  display: block;
  text-indent: -999em;
  overflow: hidden;
  background-repeat: no-repeat;
  text-align: left;
  direction: ltr;
}

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

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

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

.invisible {
  visibility: hidden;
}

.clearfix:before, .clearfix:after {
  content: "\0020";
  display: block;
  height: 0;
  overflow: hidden;
}

.clearfix:after {
  clear: both;
}

.clearfix {
  zoom: 1;
}