sass-site/source/assets/stylesheets/_helpers.scss

// ===========================================================================
// HELPERS
// Useful classes and placeholder selectors for @extend'ing.



// ---------------------------------------------------------------------------
// IMAGE REPLACEMENT

.image-replacement {
  border: 0;
  overflow: hidden;
  *text-indent: -9999em;
  background-color: transparent;

  &:before {
    display: block;
    width: 0;
    height: 100%;
    content: "";
  }
}



// ---------------------------------------------------------------------------
// VISIBILITY

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

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

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

.invisible { visibility: hidden; }



// ---------------------------------------------------------------------------
// CLEARFIX

@mixin clearfix {
  &:before,
  &:after {
    display: table;
    content: "";
  }

  &:after { clear: both; }

  *zoom: 1;
}

%clearfix { @include clearfix; }

@include at-breakpoint($break-iPhone) {
  %clearfix-iPhone { @include clearfix; }
}

@include at-breakpoint($break-iPhone-wide) {
  %clearfix-iPhone-wide { @include clearfix; }
}

@include at-breakpoint($break-iPad) {
  %clearfix-iPad { @include clearfix; }
}