adaptation of The 1KB CSS Grid to sass (http://www.1kbgrid.com/). I love Sass

1kbgrid.sass

/* adaptation of The 1KB CSS Grid to sass (http://www.1kbgrid.com/). I love Sass.

// To use:
  @import 1kbgrid.sass
  +1kbgrid(12, 60px, 10px)

=1kbgrid(!num_columns = 12, !column_width = 60px, !gutter = 10px)
  // calculated values
  !gutter_margin = !gutter / 2
  !total_column_width = !column_width + !gutter
  !row_width = !total_column_width * !num_columns

  @for !i from 1 through !num_columns
    .grid_#{!i}
      width = (!total_column_width * !i) - !gutter

  .column
    margin = 0 !gutter_margin
    overflow: hidden
    float: left
    display: inline

  .row
    width = !row_width
    margin: 0 auto
    overflow: hidden
    .row
      margin = 0 -!gutter_margin
      width: auto
      display: inline-block