/* ==========================================================================
   MIXINS
   ========================================================================== */

%tab-focus {
  // Default
  outline: thin dotted $warning-color;
  // Webkit
  outline: 5px auto $warning-color;
  outline-offset: -2px;
}

/*
   em function
   ========================================================================== */

@function em($target, $context: $doc-font-size) {
  @return ($target / $context) * 1em;
}


/*
   Bourbon clearfix
   ========================================================================== */

// Provides an easy way to include a clearfix for containing floats.
//
// @link http://cssmojo.com/latest_new_clearfix_so_far/
//
// @example scss - Usage
//   .element {
//     @include clearfix;
//   }
//
// @example css - CSS Output
//   .element::after {
//     clear: both;
//     content: "";
//     display: table;
//   }

@mixin clearfix {
  &::after {
    clear: both;
    content: "";
    display: table;
  }
}


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

@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;
}