// Stacked Icons
  // -------------------------
  
  .#{$fa-css-prefix}-stack {
    position: relative;
    display: inline-block;
    width: 2em;
    height: 2em;
    line-height: 2em;
    vertical-align: middle;
  }
  .#{$fa-css-prefix}-stack-1x, .#{$fa-css-prefix}-stack-2x {
    position: absolute;
    left: 0;
    width: 100%;
    text-align: center;
  }
  .#{$fa-css-prefix}-stack-1x { line-height: inherit; }
  .#{$fa-css-prefix}-stack-2x { font-size: 2em; }
  .#{$fa-css-prefix}-inverse { color: $fa-inverse; }