gistfile1.txt

html.flexbox {
  .stages, .stage, .dimension, .description {
    /* Removes the float layout */ 
    @include sunken; 
  }
  .stages {
    @include flexbox(horizontal);
    @include distribute-children(justify);
  }
  .stage {
    @include flexbox(vertical);
    @include distribute-children(justify); 
    @include box-flex(1);
  }
}