1  @mixin sidebar-width($borders, $width) {
 2    $sidebar-width: $width;
 3  
 4    @each $border in $borders {
 5      $direction: nth($border, 1);
 6      @if $direction == "all" {
 7        $size: map-get(map-get($borders, $direction), size);
 8        $sidebar-width: ($sidebar-width - (2 * $size));
 9      } @else if $direction == "right" {
10        $size: map-get(map-get($borders, $direction), size);
11        $sidebar-width: $sidebar-width - $size;
12      } @else if $direction == "left" {
13        $size: map-get(map-get($borders, $direction), size);
14        $sidebar-width: $sidebar-width - $size;
15      }
16      width: $sidebar-width;
17    }
18  }