--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/default/assets/scss/vendors/bourbon/utilities/_collapse-directionals.scss	Sat May 31 09:21:51 2025 +0800
@@ -0,0 +1,51 @@
+@charset "UTF-8";
+
+// scss-lint:disable ElsePlacement
+
+/// Directional-property mixins are shorthands for writing properties like
+/// the following.
+///
+/// @ignore You can also use `false` instead of `null`.
+///
+/// @argument {list} $values
+///   List of directional values.
+///
+/// @example scss
+///   .element {
+///     @include border-style(dotted null);
+///     @include margin(null 0 10px);
+///   }
+///
+///   // CSS Output
+///   .element {
+///     border-bottom-style: dotted;
+///     border-top-style: dotted;
+///     margin-bottom: 10px;
+///     margin-left: 0;
+///     margin-right: 0;
+///   }
+///
+/// @return {list}
+///
+/// @access private
+
+@function _collapse-directionals($values) {
+  $output: null;
+
+  $a: nth($values, 1);
+  $b: if(length($values) < 2, $a, nth($values, 2));
+  $c: if(length($values) < 3, $a, nth($values, 3));
+  $d: if(length($values) < 2, $a, nth($values, if(length($values) < 4, 2, 4)));
+
+  @if $a == 0 { $a: 0; }
+  @if $b == 0 { $b: 0; }
+  @if $c == 0 { $c: 0; }
+  @if $d == 0 { $d: 0; }
+
+  @if $a == $b and $a == $c and $a == $d { $output: $a;          }
+  @else if $a == $c and $b == $d         { $output: $a $b;       }
+  @else if $b == $d                      { $output: $a $b $c;    }
+  @else                                  { $output: $a $b $c $d; }
+
+  @return $output;
+}