// Overwrite the Twitter Bootsrap Grid with your custom sizes

// FIXED GRID

$grid_columns:          12 !default
$grid_column_width:     60px !default
$grid_gutter_width:     20px !default


@function grid-width($n: $grid_columns, $column_width: $grid_column_width, $gutter_width: $grid_gutter_width)
  @return ($n * $column_width) + ($n - 1) * $gutter_width

@function grid-offset($n, $column_width: $grid_column_width, $gutter_width: $grid_gutter_width)
  @return ($n * $column_width) + ($n + 1) * $gutter_width


@mixin reset-grid-fixed
  .row
    margin-left: $grid_gutter_width * -1

  [class*="span"]
    margin-left: $grid_gutter_width

  .container
    &,
    .navbar-fixed-top &,
    .navbar-fixed-bottom &
      width: grid-width()

  @for $i from 1 through $grid_columns
    .span#{$i}
      width: grid-width($i)

  @for $i from 1 through $grid_columns
    .offset#{$i}
      margin-left: grid-offset($i)


// FLUID GRID

// $grid_fluid_column_width:   6.382978723% !default
// $grid_fluid_gutter_width:   2.127659574% !default

$grid_fluid_column_width: percentage(($grid_column_width / grid-width())) !default
$grid_fluid_gutter_width: percentage(($grid_gutter_width / grid-width())) !default

@function grid-star-offset()
  @return (.5 / (grid-width()/1px) * 100 * 1%)

@mixin reset-grid-fluid

  .row-fluid
    & > [class*="span"]
      margin-left: $grid_fluid_gutter_width
      *margin-left: $grid_fluid_gutter_width - grid-star-offset()

      &:first-child
        margin-left: 0

    @for $i from 1 through $grid_columns
      & > .span#{$i}
        width: grid-width($i, $grid_fluid_column_width, $grid_fluid_gutter_width)
        *width: grid-width($i, $grid_fluid_column_width, $grid_fluid_gutter_width) - grid-star-offset()


// Reset Grid

@mixin reset-grid
  +reset-grid-fixed
  +reset-grid-fluid

  .container-fluid
    padding-left:  $grid_gutter_width
    padding-right: $grid_gutter_width

  .navbar
    .brand
      padding-left: $grid_gutter_width
      padding-right: $grid_gutter_width
      margin-left: $grid_gutter_width * -1


+reset-grid