/* ==========================================================================
   Grid mixins
   ========================================================================== */

$unit: 1em;

@mixin container() {
  margin: 0 auto;
  width: $width;
}

/*
   Works out the width of elements based on total number of columns and width
   number of columns being displayed. Removes 20px for margins.
   ========================================================================== */

@mixin grid($grid:$def_grid, $cols:'', $float:left, $display:inline) {
  display: $display;
  float: $float;
  width: (100%/$grid * $cols) - ($margin * 2);
}

/*
   Add x amount of column padding before an element
   Example: @include prefix(1,12);
   ========================================================================== */

@mixin prefix($grid:$def_grid, $cols:'') {
  margin-left: (100%/$grid * $cols);
}

/*
   Add x amount of column padding after an element
   Example: @include suffix(2,12);
   ========================================================================== */

@mixin suffix($grid:$def_grid, $cols:'') {
  margin-right: (100%/$grid * $cols);
}

/*
   Remove left margin
   Example: @include first;
   ========================================================================== */

@mixin first() {
  margin-left: 0;
}

/*
   Remove right margin
   Example: @include last;
   ========================================================================== */

@mixin last() {
  margin-right: 0;
}

/*
   Push an element x amount of column(s) to the right
   Example: @include push(2,12);
   ========================================================================== */

@mixin push($grid:$def_grid, $move:'') {
  position: relative;
  left: (100%/$grid * $move);
}

/*
   Pull an element x amount of column(s) to the left
   Example: @include pull(1,12);
   ========================================================================== */

@mixin pull($grid:$def_grid,$move:'') {
  position: relative;
  left: (100%/$grid * $move) * -1;
}