A start for semantic grids in Twitter Bootstrap

semantic_twitter_boostrap_grid.sass

// clearly, still in progress...

$fluidLayout: true

$fluidLayout: false !default

// Semantic grid mixins
@mixin row($fluid: $fluidLayout)
  @if $fluid == true
    width: 100%
  @else
    margin-left: $gridGutterWidth * -1
  @include clearfix

.row
  @include row

@mixin columns($columns, $gridColumnWidth, $gridGutterWidth, $fluid: $fluidLayout)
  @if $fluid == true
    @include fluidGridSystemGridColumn($fluidGridGutterWidth)
    @include fluidGridSystemColumns($fluidGridGutterWidth, $fluidGridColumnWidth, $columns)
    &:first-child
      margin-left: 0
  @else
    @include gridSystemGridColumn($gridGutterWidth)
    @include gridSystemColumns($gridGutterWidth, $gridColumnWidth, $gridRowWidth, $columns)



// Semantic grid set-up
#main-content
  @extend row
  #main
    +columns(8)
  #sidebar
    +columns(4)