Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.7)
// Compass (v1.0.1)
// ----

@mixin iconfont {
  position: absolute;
  top: -5px;
  font-family: 'Icons';
  speak: none;
  font-style: normal;
  font-weight: normal;
  font-variant: normal;
  text-transform: none;
  line-height: 1;
  left: 0;
  
  
  /* Better Font Rendering =========== */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@mixin norbert($features, $supports) {

  #{$placeholder} & {
    @content;
  }

  @at-root #{$selector} {
    @extend #{$placeholder};
  }

}

[class^="iconfont-"]:before,
[class*=" iconfont-"]:before {
  @include iconfont;
}


[class^="iconfont-"]:before,
[class*=" iconfont-"]:before {
  @at-root .btn#{&} {
      position: relative;
      top: 0;
  }
}

SassMeister-output.css

[class^="iconfont-"]:before,
[class*=" iconfont-"]:before {
  position: absolute;
  top: -5px;
  font-family: 'Icons';
  speak: none;
  font-style: normal;
  font-weight: normal;
  font-variant: normal;
  text-transform: none;
  line-height: 1;
  left: 0;
  /* Better Font Rendering =========== */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.btn[class^="iconfont-"]:before, [class*=" iconfont-"]:before {
  position: relative;
  top: 0;
}