humus-old/scss/graphics.scss

@mixin shadow-border($size, $color, $radius: $size) {
  box-shadow:
    -#{$size} -#{$size} $radius $color,
       $size     $size  $radius $color,
    -#{$size}    $size  $radius $color,
       $size  -#{$size} $radius $color
  ;
}