4 files changed, 71 insertions, 17 deletions
diff --git a/vendor/twbs/bootstrap/scss/mixins/_backdrop.scss b/vendor/twbs/bootstrap/scss/mixins/_backdrop.scss
new file mode 100644
index 000000000..9705ae9ee
--- /dev/null
+++ b/vendor/twbs/bootstrap/scss/mixins/_backdrop.scss
@@ -0,0 +1,14 @@
+// Shared between modals and offcanvases
+@mixin overlay-backdrop($zindex, $backdrop-bg, $backdrop-opacity) {
+  position: fixed;
+  top: 0;
+  left: 0;
+  z-index: $zindex;
+  width: 100vw;
+  height: 100vh;
+  background-color: $backdrop-bg;
+
+  // Fade for backdrop
+  &.fade { opacity: 0; }
+  &.show { opacity: $backdrop-opacity; }
+}
diff --git a/vendor/twbs/bootstrap/scss/mixins/_grid.scss b/vendor/twbs/bootstrap/scss/mixins/_grid.scss
index ff6941c46..aea51abaf 100644
--- a/vendor/twbs/bootstrap/scss/mixins/_grid.scss
+++ b/vendor/twbs/bootstrap/scss/mixins/_grid.scss
@@ -7,9 +7,10 @@
   --#{$variable-prefix}gutter-y: 0;
   display: flex;
   flex-wrap: wrap;
-  margin-top: calc(var(--#{$variable-prefix}gutter-y) * -1); // stylelint-disable-line function-disallowed-list
-  margin-right: calc(var(--#{$variable-prefix}gutter-x) * -.5); // stylelint-disable-line function-disallowed-list
-  margin-left: calc(var(--#{$variable-prefix}gutter-x) * -.5); // stylelint-disable-line function-disallowed-list
+  // TODO: Revisit calc order after https://github.com/react-bootstrap/react-bootstrap/issues/6039 is fixed
+  margin-top: calc(-1 * var(--#{$variable-prefix}gutter-y)); // stylelint-disable-line function-disallowed-list
+  margin-right: calc(-.5 * var(--#{$variable-prefix}gutter-x)); // stylelint-disable-line function-disallowed-list
+  margin-left: calc(-.5 * var(--#{$variable-prefix}gutter-x)); // stylelint-disable-line function-disallowed-list
 }
 
 @mixin make-col-ready($gutter: $grid-gutter-width) {
@@ -66,8 +67,8 @@
 
 @mixin make-grid-columns($columns: $grid-columns, $gutter: $grid-gutter-width, $breakpoints: $grid-breakpoints) {
   @each $breakpoint in map-keys($breakpoints) {
-    // .row-cols defaults must all appear before .col overrides so they can be overridden.
     $infix: breakpoint-infix($breakpoint, $breakpoints);
+
     @include media-breakpoint-up($breakpoint, $breakpoints) {
       // Provide basic `.col-{bp}` classes for equal-width flexbox columns
       .col#{$infix} {
@@ -85,13 +86,7 @@
           }
         }
       }
-    }
-  }
-
-  @each $breakpoint in map-keys($breakpoints) {
-    $infix: breakpoint-infix($breakpoint, $breakpoints);
 
-    @include media-breakpoint-up($breakpoint, $breakpoints) {
       .col#{$infix}-auto {
         @include make-col-auto();
       }
@@ -130,3 +125,27 @@
     }
   }
 }
+
+@mixin make-cssgrid($columns: $grid-columns, $breakpoints: $grid-breakpoints) {
+  @each $breakpoint in map-keys($breakpoints) {
+    $infix: breakpoint-infix($breakpoint, $breakpoints);
+
+    @include media-breakpoint-up($breakpoint, $breakpoints) {
+      @if $columns > 0 {
+        @for $i from 1 through $columns {
+          .g-col#{$infix}-#{$i} {
+            grid-column: auto / span $i;
+          }
+        }
+
+        // Start with `1` because `0` is and invalid value.
+        // Ends with `$columns - 1` because offsetting by the width of an entire row isn't possible.
+        @for $i from 1 through ($columns - 1) {
+          .g-start#{$infix}-#{$i} {
+            grid-column-start: $i;
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/vendor/twbs/bootstrap/scss/mixins/_utilities.scss b/vendor/twbs/bootstrap/scss/mixins/_utilities.scss
index 4d2370a0b..e871b4233 100644
--- a/vendor/twbs/bootstrap/scss/mixins/_utilities.scss
+++ b/vendor/twbs/bootstrap/scss/mixins/_utilities.scss
@@ -41,25 +41,46 @@
       }
     }
 
+    $is-css-var: map-get($utility, css-var);
+    $is-local-vars: map-get($utility, local-vars);
     $is-rtl: map-get($utility, rtl);
 
     @if $value != null {
       @if $is-rtl == false {
         /* rtl:begin:remove */
       }
-      .#{$property-class + $infix + $property-class-modifier} {
-        @each $property in $properties {
-          #{$property}: $value if($enable-important-utilities, !important, null);
+
+      @if $is-css-var {
+        .#{$property-class + $infix + $property-class-modifier} {
+          --#{$variable-prefix}#{$property-class}: #{$value};
         }
-      }
 
-      @each $pseudo in $state {
-        .#{$property-class + $infix + $property-class-modifier}-#{$pseudo}:#{$pseudo} {
+        @each $pseudo in $state {
+          .#{$property-class + $infix + $property-class-modifier}-#{$pseudo}:#{$pseudo} {
+            --#{$variable-prefix}#{$property-class}: #{$value};
+          }
+        }
+      } @else {
+        .#{$property-class + $infix + $property-class-modifier} {
           @each $property in $properties {
+            @if $is-local-vars {
+              @each $local-var, $value in $is-local-vars {
+                --#{$variable-prefix}#{$local-var}: #{$value};
+              }
+            }
             #{$property}: $value if($enable-important-utilities, !important, null);
           }
         }
+
+        @each $pseudo in $state {
+          .#{$property-class + $infix + $property-class-modifier}-#{$pseudo}:#{$pseudo} {
+            @each $property in $properties {
+              #{$property}: $value if($enable-important-utilities, !important, null);
+            }
+          }
+        }
       }
+
       @if $is-rtl == false {
         /* rtl:end:remove */
       }
diff --git a/vendor/twbs/bootstrap/scss/mixins/_visually-hidden.scss b/vendor/twbs/bootstrap/scss/mixins/_visually-hidden.scss
index ed7bc9c13..4fc7f49d6 100644
--- a/vendor/twbs/bootstrap/scss/mixins/_visually-hidden.scss
+++ b/vendor/twbs/bootstrap/scss/mixins/_visually-hidden.scss
@@ -3,7 +3,7 @@
 // Hide content visually while keeping it accessible to assistive technologies
 //
 // See: https://www.a11yproject.com/posts/2013-01-11-how-to-hide-content/
-// See: https://hugogiraudel.com/2016/10/13/css-hide-and-seek/
+// See: https://kittygiraudel.com/2016/10/13/css-hide-and-seek/
 
 @mixin visually-hidden() {
   position: absolute !important;