Adding upstream version 5.3.0+dfsg.upstream/5.3.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

55 files changed, 1780 insertions, 338 deletions

diff --git a/scss/_accordion.scss b/scss/_accordion.scss
index f09601b..75588a5 100644
--- a/scss/_accordion.scss
+++ b/scss/_accordion.scss
@@ -147,3 +147,12 @@
     }
   }
 }
+
+@if $enable-dark-mode {
+  @include color-mode(dark) {
+    .accordion-button::after {
+      --#{$prefix}accordion-btn-icon: #{escape-svg($accordion-button-icon-dark)};
+      --#{$prefix}accordion-btn-active-icon: #{escape-svg($accordion-button-active-icon-dark)};
+    }
+  }
+}
diff --git a/scss/_alert.scss b/scss/_alert.scss
index c8bc91b..b8cff9b 100644
--- a/scss/_alert.scss
+++ b/scss/_alert.scss
@@ -12,6 +12,7 @@
   --#{$prefix}alert-border-color: transparent;
   --#{$prefix}alert-border: #{$alert-border-width} solid var(--#{$prefix}alert-border-color);
   --#{$prefix}alert-border-radius: #{$alert-border-radius};
+  --#{$prefix}alert-link-color: inherit;
   // scss-docs-end alert-css-vars
 
   position: relative;
@@ -32,6 +33,7 @@
 // Provide class for links that match alerts
 .alert-link {
   font-weight: $alert-link-font-weight;
+  color: var(--#{$prefix}alert-link-color);
 }
 
 
@@ -54,18 +56,13 @@
 
 
 // scss-docs-start alert-modifiers
-// Generate contextual modifier classes for colorizing the alert.
-
-@each $state, $value in $theme-colors {
-  $alert-background: shift-color($value, $alert-bg-scale);
-  $alert-border: shift-color($value, $alert-border-scale);
-  $alert-color: shift-color($value, $alert-color-scale);
-
-  @if (contrast-ratio($alert-background, $alert-color) < $min-contrast-ratio) {
-    $alert-color: mix($value, color-contrast($alert-background), abs($alert-color-scale));
-  }
+// Generate contextual modifier classes for colorizing the alert
+@each $state in map-keys($theme-colors) {
   .alert-#{$state} {
-    @include alert-variant($alert-background, $alert-border, $alert-color);
+    --#{$prefix}alert-color: var(--#{$prefix}#{$state}-text-emphasis);
+    --#{$prefix}alert-bg: var(--#{$prefix}#{$state}-bg-subtle);
+    --#{$prefix}alert-border-color: var(--#{$prefix}#{$state}-border-subtle);
+    --#{$prefix}alert-link-color: var(--#{$prefix}#{$state}-text-emphasis);
   }
 }
 // scss-docs-end alert-modifiers
diff --git a/scss/_button-group.scss b/scss/_button-group.scss
index 79b100c..55ae3f6 100644
--- a/scss/_button-group.scss
+++ b/scss/_button-group.scss
@@ -39,7 +39,7 @@
   // Prevent double borders when buttons are next to each other
   > :not(.btn-check:first-child) + .btn,
   > .btn-group:not(:first-child) {
-    margin-left: -$btn-border-width;
+    margin-left: calc(#{$btn-border-width} * -1); // stylelint-disable-line function-disallowed-list
   }
 
   // Reset rounded corners
@@ -126,7 +126,7 @@
 
   > .btn:not(:first-child),
   > .btn-group:not(:first-child) {
-    margin-top: -$btn-border-width;
+    margin-top: calc(#{$btn-border-width} * -1); // stylelint-disable-line function-disallowed-list
   }
 
   // Reset rounded corners
diff --git a/scss/_buttons.scss b/scss/_buttons.scss
index f2c4c13..cbc0784 100644
--- a/scss/_buttons.scss
+++ b/scss/_buttons.scss
@@ -10,7 +10,7 @@
   @include rfs($btn-font-size, --#{$prefix}btn-font-size);
   --#{$prefix}btn-font-weight: #{$btn-font-weight};
   --#{$prefix}btn-line-height: #{$btn-line-height};
-  --#{$prefix}btn-color: #{$body-color};
+  --#{$prefix}btn-color: #{$btn-color};
   --#{$prefix}btn-bg: transparent;
   --#{$prefix}btn-border-width: #{$btn-border-width};
   --#{$prefix}btn-border-color: transparent;
@@ -169,8 +169,8 @@
   --#{$prefix}btn-active-border-color: transparent;
   --#{$prefix}btn-disabled-color: #{$btn-link-disabled-color};
   --#{$prefix}btn-disabled-border-color: transparent;
-  --#{$prefix}btn-box-shadow: none;
-  --#{$prefix}btn-focus-shadow-rgb: #{to-rgb(mix(color-contrast($primary), $primary, 15%))};
+  --#{$prefix}btn-box-shadow: 0 0 0 #000; // Can't use `none` as keyword negates all values when used with multiple shadows
+  --#{$prefix}btn-focus-shadow-rgb: #{to-rgb(mix(color-contrast($link-color), $link-color, 15%))};
 
   text-decoration: $link-decoration;
   @if $enable-gradients {
diff --git a/scss/_card.scss b/scss/_card.scss
index ce8c02f..d3535a9 100644
--- a/scss/_card.scss
+++ b/scss/_card.scss
@@ -7,6 +7,8 @@
   --#{$prefix}card-spacer-y: #{$card-spacer-y};
   --#{$prefix}card-spacer-x: #{$card-spacer-x};
   --#{$prefix}card-title-spacer-y: #{$card-title-spacer-y};
+  --#{$prefix}card-title-color: #{$card-title-color};
+  --#{$prefix}card-subtitle-color: #{$card-subtitle-color};
   --#{$prefix}card-border-width: #{$card-border-width};
   --#{$prefix}card-border-color: #{$card-border-color};
   --#{$prefix}card-border-radius: #{$card-border-radius};
@@ -28,6 +30,7 @@
   flex-direction: column;
   min-width: 0; // See https://github.com/twbs/bootstrap/pull/22740#issuecomment-305868106
   height: var(--#{$prefix}card-height);
+  color: var(--#{$prefix}body-color);
   word-wrap: break-word;
   background-color: var(--#{$prefix}card-bg);
   background-clip: border-box;
@@ -73,11 +76,13 @@
 
 .card-title {
   margin-bottom: var(--#{$prefix}card-title-spacer-y);
+  color: var(--#{$prefix}card-title-color);
 }
 
 .card-subtitle {
   margin-top: calc(-.5 * var(--#{$prefix}card-title-spacer-y)); // stylelint-disable-line function-disallowed-list
   margin-bottom: 0;
+  color: var(--#{$prefix}card-subtitle-color);
 }
 
 .card-text:last-child {
diff --git a/scss/_carousel.scss b/scss/_carousel.scss
index 858b836..0ac8f87 100644
--- a/scss/_carousel.scss
+++ b/scss/_carousel.scss
@@ -165,7 +165,6 @@
   margin-right: $carousel-control-width;
   margin-bottom: 1rem;
   margin-left: $carousel-control-width;
-  list-style: none;
 
   [data-bs-target] {
     box-sizing: content-box;
@@ -210,7 +209,7 @@
 
 // Dark mode carousel
 
-.carousel-dark {
+@mixin carousel-dark() {
   .carousel-control-prev-icon,
   .carousel-control-next-icon {
     filter: $carousel-dark-control-icon-filter;
@@ -224,3 +223,22 @@
     color: $carousel-dark-caption-color;
   }
 }
+
+.carousel-dark {
+  @include carousel-dark();
+}
+
+@if $enable-dark-mode {
+  @include color-mode(dark) {
+    @if $color-mode-type == "media-query" {
+      .carousel {
+        @include carousel-dark();
+      }
+    } @else {
+      .carousel,
+      &.carousel {
+        @include carousel-dark();
+      }
+    }
+  }
+}
diff --git a/scss/_close.scss b/scss/_close.scss
index a0813de..4d6e73c 100644
--- a/scss/_close.scss
+++ b/scss/_close.scss
@@ -4,37 +4,60 @@
 // See https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile
 
 .btn-close {
+  // scss-docs-start close-css-vars
+  --#{$prefix}btn-close-color: #{$btn-close-color};
+  --#{$prefix}btn-close-bg: #{ escape-svg($btn-close-bg) };
+  --#{$prefix}btn-close-opacity: #{$btn-close-opacity};
+  --#{$prefix}btn-close-hover-opacity: #{$btn-close-hover-opacity};
+  --#{$prefix}btn-close-focus-shadow: #{$btn-close-focus-shadow};
+  --#{$prefix}btn-close-focus-opacity: #{$btn-close-focus-opacity};
+  --#{$prefix}btn-close-disabled-opacity: #{$btn-close-disabled-opacity};
+  --#{$prefix}btn-close-white-filter: #{$btn-close-white-filter};
+  // scss-docs-end close-css-vars
+
   box-sizing: content-box;
   width: $btn-close-width;
   height: $btn-close-height;
   padding: $btn-close-padding-y $btn-close-padding-x;
-  color: $btn-close-color;
-  background: transparent escape-svg($btn-close-bg) center / $btn-close-width auto no-repeat; // include transparent for button elements
+  color: var(--#{$prefix}btn-close-color);
+  background: transparent var(--#{$prefix}btn-close-bg) center / $btn-close-width auto no-repeat; // include transparent for button elements
   border: 0; // for button elements
   @include border-radius();
-  opacity: $btn-close-opacity;
+  opacity: var(--#{$prefix}btn-close-opacity);
 
   // Override <a>'s hover style
   &:hover {
-    color: $btn-close-color;
+    color: var(--#{$prefix}btn-close-color);
     text-decoration: none;
-    opacity: $btn-close-hover-opacity;
+    opacity: var(--#{$prefix}btn-close-hover-opacity);
   }
 
   &:focus {
     outline: 0;
-    box-shadow: $btn-close-focus-shadow;
-    opacity: $btn-close-focus-opacity;
+    box-shadow: var(--#{$prefix}btn-close-focus-shadow);
+    opacity: var(--#{$prefix}btn-close-focus-opacity);
   }
 
   &:disabled,
   &.disabled {
     pointer-events: none;
     user-select: none;
-    opacity: $btn-close-disabled-opacity;
+    opacity: var(--#{$prefix}btn-close-disabled-opacity);
   }
 }
 
+@mixin btn-close-white() {
+  filter: var(--#{$prefix}btn-close-white-filter);
+}
+
 .btn-close-white {
-  filter: $btn-close-white-filter;
+  @include btn-close-white();
+}
+
+@if $enable-dark-mode {
+  @include color-mode(dark) {
+    .btn-close {
+      @include btn-close-white();
+    }
+  }
 }
diff --git a/scss/_dropdown.scss b/scss/_dropdown.scss
index 8899d25..587ebb4 100644
--- a/scss/_dropdown.scss
+++ b/scss/_dropdown.scss
@@ -184,6 +184,7 @@
   white-space: nowrap; // prevent links from randomly breaking onto new lines
   background-color: transparent; // For `<button>`s
   border: 0; // For `<button>`s
+  @include border-radius(var(--#{$prefix}dropdown-item-border-radius, 0));
 
   &:hover,
   &:focus {
diff --git a/scss/_functions.scss b/scss/_functions.scss
index 26c953b..9029658 100644
--- a/scss/_functions.scss
+++ b/scss/_functions.scss
@@ -188,7 +188,7 @@ $_luminance-list: .0008 .001 .0011 .0013 .0015 .0017 .002 .0022 .0025 .0027 .003
   );
 
   @each $name, $value in $rgb {
-    $value: if(divide($value, 255) < .03928, divide(divide($value, 255), 12.92), nth($_luminance-list, $value + 1));
+    $value: if(divide($value, 255) < .04045, divide(divide($value, 255), 12.92), nth($_luminance-list, $value + 1));
     $rgb: map-merge($rgb, ($name: $value));
   }
 
diff --git a/scss/_grid.scss b/scss/_grid.scss
index 0e0ba21..048f800 100644
--- a/scss/_grid.scss
+++ b/scss/_grid.scss
@@ -2,6 +2,12 @@
 //
 // Rows contain your columns.
 
+:root {
+  @each $name, $value in $grid-breakpoints {
+    --#{$prefix}breakpoint-#{$name}: #{$value};
+  }
+}
+
 @if $enable-grid-classes {
   .row {
     @include make-row();
diff --git a/scss/_helpers.scss b/scss/_helpers.scss
index 644b693..13f2752 100644
--- a/scss/_helpers.scss
+++ b/scss/_helpers.scss
@@ -1,6 +1,8 @@
 @import "helpers/clearfix";
 @import "helpers/color-bg";
 @import "helpers/colored-links";
+@import "helpers/focus-ring";
+@import "helpers/icon-link";
 @import "helpers/ratio";
 @import "helpers/position";
 @import "helpers/stacks";
diff --git a/scss/_list-group.scss b/scss/_list-group.scss
index c0ec164..455531e 100644
--- a/scss/_list-group.scss
+++ b/scss/_list-group.scss
@@ -180,13 +180,18 @@
 // Add modifier classes to change text and background color on individual items.
 // Organizationally, this must come after the `:hover` states.
 
-@each $state, $value in $theme-colors {
-  $list-group-variant-bg: shift-color($value, $list-group-item-bg-scale);
-  $list-group-variant-color: shift-color($value, $list-group-item-color-scale);
-  @if (contrast-ratio($list-group-variant-bg, $list-group-variant-color) < $min-contrast-ratio) {
-    $list-group-variant-color: mix($value, color-contrast($list-group-variant-bg), abs($list-group-item-color-scale));
+@each $state in map-keys($theme-colors) {
+  .list-group-item-#{$state} {
+    --#{$prefix}list-group-color: var(--#{$prefix}#{$state}-text-emphasis);
+    --#{$prefix}list-group-bg: var(--#{$prefix}#{$state}-bg-subtle);
+    --#{$prefix}list-group-border-color: var(--#{$prefix}#{$state}-border-subtle);
+    --#{$prefix}list-group-action-hover-color: var(--#{$prefix}emphasis-color);
+    --#{$prefix}list-group-action-hover-bg: var(--#{$prefix}#{$state}-border-subtle);
+    --#{$prefix}list-group-action-active-color: var(--#{$prefix}emphasis-color);
+    --#{$prefix}list-group-action-active-bg: var(--#{$prefix}#{$state}-border-subtle);
+    --#{$prefix}list-group-active-color: var(--#{$prefix}#{$state}-bg-subtle);
+    --#{$prefix}list-group-active-bg: var(--#{$prefix}#{$state}-text-emphasis);
+    --#{$prefix}list-group-active-border-color: var(--#{$prefix}#{$state}-text-emphasis);
   }
-
-  @include list-group-item-variant($state, $list-group-variant-bg, $list-group-variant-color);
 }
 // scss-docs-end list-group-modifiers
diff --git a/scss/_maps.scss b/scss/_maps.scss
index 2770a67..68ee421 100644
--- a/scss/_maps.scss
+++ b/scss/_maps.scss
@@ -6,6 +6,90 @@
 $theme-colors-rgb: map-loop($theme-colors, to-rgb, "$value") !default;
 // scss-docs-end theme-colors-rgb
 
+// scss-docs-start theme-text-map
+$theme-colors-text: (
+  "primary": $primary-text-emphasis,
+  "secondary": $secondary-text-emphasis,
+  "success": $success-text-emphasis,
+  "info": $info-text-emphasis,
+  "warning": $warning-text-emphasis,
+  "danger": $danger-text-emphasis,
+  "light": $light-text-emphasis,
+  "dark": $dark-text-emphasis,
+) !default;
+// scss-docs-end theme-text-map
+
+// scss-docs-start theme-bg-subtle-map
+$theme-colors-bg-subtle: (
+  "primary": $primary-bg-subtle,
+  "secondary": $secondary-bg-subtle,
+  "success": $success-bg-subtle,
+  "info": $info-bg-subtle,
+  "warning": $warning-bg-subtle,
+  "danger": $danger-bg-subtle,
+  "light": $light-bg-subtle,
+  "dark": $dark-bg-subtle,
+) !default;
+// scss-docs-end theme-bg-subtle-map
+
+// scss-docs-start theme-border-subtle-map
+$theme-colors-border-subtle: (
+  "primary": $primary-border-subtle,
+  "secondary": $secondary-border-subtle,
+  "success": $success-border-subtle,
+  "info": $info-border-subtle,
+  "warning": $warning-border-subtle,
+  "danger": $danger-border-subtle,
+  "light": $light-border-subtle,
+  "dark": $dark-border-subtle,
+) !default;
+// scss-docs-end theme-border-subtle-map
+
+$theme-colors-text-dark: null !default;
+$theme-colors-bg-subtle-dark: null !default;
+$theme-colors-border-subtle-dark: null !default;
+
+@if $enable-dark-mode {
+  // scss-docs-start theme-text-dark-map
+  $theme-colors-text-dark: (
+    "primary": $primary-text-emphasis-dark,
+    "secondary": $secondary-text-emphasis-dark,
+    "success": $success-text-emphasis-dark,
+    "info": $info-text-emphasis-dark,
+    "warning": $warning-text-emphasis-dark,
+    "danger": $danger-text-emphasis-dark,
+    "light": $light-text-emphasis-dark,
+    "dark": $dark-text-emphasis-dark,
+  ) !default;
+  // scss-docs-end theme-text-dark-map
+
+  // scss-docs-start theme-bg-subtle-dark-map
+  $theme-colors-bg-subtle-dark: (
+    "primary": $primary-bg-subtle-dark,
+    "secondary": $secondary-bg-subtle-dark,
+    "success": $success-bg-subtle-dark,
+    "info": $info-bg-subtle-dark,
+    "warning": $warning-bg-subtle-dark,
+    "danger": $danger-bg-subtle-dark,
+    "light": $light-bg-subtle-dark,
+    "dark": $dark-bg-subtle-dark,
+  ) !default;
+  // scss-docs-end theme-bg-subtle-dark-map
+
+  // scss-docs-start theme-border-subtle-dark-map
+  $theme-colors-border-subtle-dark: (
+    "primary": $primary-border-subtle-dark,
+    "secondary": $secondary-border-subtle-dark,
+    "success": $success-border-subtle-dark,
+    "info": $info-border-subtle-dark,
+    "warning": $warning-border-subtle-dark,
+    "danger": $danger-border-subtle-dark,
+    "light": $light-border-subtle-dark,
+    "dark": $dark-border-subtle-dark,
+  ) !default;
+  // scss-docs-end theme-border-subtle-dark-map
+}
+
 // Utilities maps
 //
 // Extends the default `$theme-colors` maps to help create our utilities.
@@ -25,6 +109,17 @@ $utilities-text: map-merge(
   )
 ) !default;
 $utilities-text-colors: map-loop($utilities-text, rgba-css-var, "$key", "text") !default;
+
+$utilities-text-emphasis-colors: (
+  "primary-emphasis": var(--#{$prefix}primary-text-emphasis),
+  "secondary-emphasis": var(--#{$prefix}secondary-text-emphasis),
+  "success-emphasis": var(--#{$prefix}success-text-emphasis),
+  "info-emphasis": var(--#{$prefix}info-text-emphasis),
+  "warning-emphasis": var(--#{$prefix}warning-text-emphasis),
+  "danger-emphasis": var(--#{$prefix}danger-text-emphasis),
+  "light-emphasis": var(--#{$prefix}light-text-emphasis),
+  "dark-emphasis": var(--#{$prefix}dark-text-emphasis)
+) !default;
 // scss-docs-end utilities-text-colors
 
 // scss-docs-start utilities-bg-colors
@@ -37,18 +132,43 @@ $utilities-bg: map-merge(
   )
 ) !default;
 $utilities-bg-colors: map-loop($utilities-bg, rgba-css-var, "$key", "bg") !default;
+
+$utilities-bg-subtle: (
+  "primary-subtle": var(--#{$prefix}primary-bg-subtle),
+  "secondary-subtle": var(--#{$prefix}secondary-bg-subtle),
+  "success-subtle": var(--#{$prefix}success-bg-subtle),
+  "info-subtle": var(--#{$prefix}info-bg-subtle),
+  "warning-subtle": var(--#{$prefix}warning-bg-subtle),
+  "danger-subtle": var(--#{$prefix}danger-bg-subtle),
+  "light-subtle": var(--#{$prefix}light-bg-subtle),
+  "dark-subtle": var(--#{$prefix}dark-bg-subtle)
+) !default;
 // scss-docs-end utilities-bg-colors
 
 // scss-docs-start utilities-border-colors
 $utilities-border: map-merge(
   $utilities-colors,
   (
+    "black": to-rgb($black),
     "white": to-rgb($white)
   )
 ) !default;
 $utilities-border-colors: map-loop($utilities-border, rgba-css-var, "$key", "border") !default;
+
+$utilities-border-subtle: (
+  "primary-subtle": var(--#{$prefix}primary-border-subtle),
+  "secondary-subtle": var(--#{$prefix}secondary-border-subtle),
+  "success-subtle": var(--#{$prefix}success-border-subtle),
+  "info-subtle": var(--#{$prefix}info-border-subtle),
+  "warning-subtle": var(--#{$prefix}warning-border-subtle),
+  "danger-subtle": var(--#{$prefix}danger-border-subtle),
+  "light-subtle": var(--#{$prefix}light-border-subtle),
+  "dark-subtle": var(--#{$prefix}dark-border-subtle)
+) !default;
 // scss-docs-end utilities-border-colors
 
+$utilities-links-underline: map-loop($utilities-colors, rgba-css-var, "$key", "link-underline") !default;
+
 $negative-spacers: if($enable-negative-margins, negativify-map($spacers), null) !default;
 
 $gutters: $spacers !default;
diff --git a/scss/_mixins.scss b/scss/_mixins.scss
index af1f74f..e1e130b 100644
--- a/scss/_mixins.scss
+++ b/scss/_mixins.scss
@@ -10,6 +10,7 @@
 
 // Helpers
 @import "mixins/breakpoints";
+@import "mixins/color-mode";
 @import "mixins/color-scheme";
 @import "mixins/image";
 @import "mixins/resize";
@@ -21,13 +22,11 @@
 @import "mixins/utilities";
 
 // Components
-@import "mixins/alert";
 @import "mixins/backdrop";
 @import "mixins/buttons";
 @import "mixins/caret";
 @import "mixins/pagination";
 @import "mixins/lists";
-@import "mixins/list-group";
 @import "mixins/forms";
 @import "mixins/table-variants";
 
diff --git a/scss/_nav.scss b/scss/_nav.scss
index 9efc03b..aedbdba 100644
--- a/scss/_nav.scss
+++ b/scss/_nav.scss
@@ -28,6 +28,8 @@
   font-weight: var(--#{$prefix}nav-link-font-weight);
   color: var(--#{$prefix}nav-link-color);
   text-decoration: if($link-decoration == none, null, none);
+  background: none;
+  border: 0;
   @include transition($nav-link-transition);
 
   &:hover,
@@ -36,6 +38,11 @@
     text-decoration: if($link-hover-decoration == underline, none, null);
   }
 
+  &:focus-visible {
+    outline: 0;
+    box-shadow: $nav-link-focus-box-shadow;
+  }
+
   // Disabled state lightens text
   &.disabled {
     color: var(--#{$prefix}nav-link-disabled-color);
@@ -63,7 +70,6 @@
 
   .nav-link {
     margin-bottom: calc(-1 * var(--#{$prefix}nav-tabs-border-width)); // stylelint-disable-line function-disallowed-list
-    background: none;
     border: var(--#{$prefix}nav-tabs-border-width) solid transparent;
     @include border-top-radius(var(--#{$prefix}nav-tabs-border-radius));
 
@@ -110,8 +116,6 @@
   // scss-docs-end nav-pills-css-vars
 
   .nav-link {
-    background: none;
-    border: 0;
     @include border-radius(var(--#{$prefix}nav-pills-border-radius));
 
     &:disabled {
@@ -130,6 +134,39 @@
 
 
 //
+// Underline
+//
+
+.nav-underline {
+  // scss-docs-start nav-underline-css-vars
+  --#{$prefix}nav-underline-gap: #{$nav-underline-gap};
+  --#{$prefix}nav-underline-border-width: #{$nav-underline-border-width};
+  --#{$prefix}nav-underline-link-active-color: #{$nav-underline-link-active-color};
+  // scss-docs-end nav-underline-css-vars
+
+  gap: var(--#{$prefix}nav-underline-gap);
+
+  .nav-link {
+    padding-right: 0;
+    padding-left: 0;
+    border-bottom: var(--#{$prefix}nav-underline-border-width) solid transparent;
+
+    &:hover,
+    &:focus {
+      border-bottom-color: currentcolor;
+    }
+  }
+
+  .nav-link.active,
+  .show > .nav-link {
+    font-weight: $font-weight-bold;
+    color: var(--#{$prefix}nav-underline-link-active-color);
+    border-bottom-color: currentcolor;
+  }
+}
+
+
+//
 // Justified variants
 //
 
diff --git a/scss/_navbar.scss b/scss/_navbar.scss
index 599b055..7161938 100644
--- a/scss/_navbar.scss
+++ b/scss/_navbar.scss
@@ -100,9 +100,11 @@
   margin-bottom: 0;
   list-style: none;
 
-  .show > .nav-link,
-  .nav-link.active {
-    color: var(--#{$prefix}navbar-active-color);
+  .nav-link {
+    &.active,
+    &.show {
+      color: var(--#{$prefix}navbar-active-color);
+    }
   }
 
   .dropdown-menu {
@@ -264,7 +266,8 @@
   @include deprecate("`.navbar-light`", "v5.2.0", "v6.0.0", true);
 }
 
-.navbar-dark {
+.navbar-dark,
+.navbar[data-bs-theme="dark"] {
   // scss-docs-start navbar-dark-css-vars
   --#{$prefix}navbar-color: #{$navbar-dark-color};
   --#{$prefix}navbar-hover-color: #{$navbar-dark-hover-color};
@@ -276,3 +279,11 @@
   --#{$prefix}navbar-toggler-icon-bg: #{escape-svg($navbar-dark-toggler-icon-bg)};
   // scss-docs-end navbar-dark-css-vars
 }
+
+@if $enable-dark-mode {
+  @include color-mode(dark) {
+    .navbar-toggler-icon {
+      --#{$prefix}navbar-toggler-icon-bg: #{escape-svg($navbar-dark-toggler-icon-bg)};
+    }
+  }
+}
diff --git a/scss/_offcanvas.scss b/scss/_offcanvas.scss
index 23fc357..04e3ce6 100644
--- a/scss/_offcanvas.scss
+++ b/scss/_offcanvas.scss
@@ -12,6 +12,8 @@
   --#{$prefix}offcanvas-border-width: #{$offcanvas-border-width};
   --#{$prefix}offcanvas-border-color: #{$offcanvas-border-color};
   --#{$prefix}offcanvas-box-shadow: #{$offcanvas-box-shadow};
+  --#{$prefix}offcanvas-transition: #{transform $offcanvas-transition-duration ease-in-out};
+  --#{$prefix}offcanvas-title-line-height: #{$offcanvas-title-line-height};
   // scss-docs-end offcanvas-css-vars
 }
 
@@ -42,7 +44,7 @@
       background-clip: padding-box;
       outline: 0;
       @include box-shadow(var(--#{$prefix}offcanvas-box-shadow));
-      @include transition(transform $offcanvas-transition-duration ease-in-out);
+      @include transition(var(--#{$prefix}offcanvas-transition));
 
       &.offcanvas-start {
         top: 0;
@@ -134,7 +136,7 @@
 
 .offcanvas-title {
   margin-bottom: 0;
-  line-height: $offcanvas-title-line-height;
+  line-height: var(--#{$prefix}offcanvas-title-line-height);
 }
 
 .offcanvas-body {
diff --git a/scss/_pagination.scss b/scss/_pagination.scss
index cf4db3c..f275a62 100644
--- a/scss/_pagination.scss
+++ b/scss/_pagination.scss
@@ -75,7 +75,7 @@
     margin-left: $pagination-margin-start;
   }
 
-  @if $pagination-margin-start == ($pagination-border-width * -1) {
+  @if $pagination-margin-start == calc(#{$pagination-border-width} * -1) {
     &:first-child {
       .page-link {
         @include border-start-radius(var(--#{$prefix}pagination-border-radius));
diff --git a/scss/_progress.scss b/scss/_progress.scss
index 1bfafb5..148c381 100644
--- a/scss/_progress.scss
+++ b/scss/_progress.scss
@@ -8,7 +8,8 @@
 }
 // scss-docs-end progress-keyframes
 
-.progress {
+.progress,
+.progress-stacked {
   // scss-docs-start progress-css-vars
   --#{$prefix}progress-height: #{$progress-height};
   @include rfs($progress-font-size, --#{$prefix}progress-font-size);
@@ -46,6 +47,14 @@
   background-size: var(--#{$prefix}progress-height) var(--#{$prefix}progress-height);
 }
 
+.progress-stacked > .progress {
+  overflow: visible;
+}
+
+.progress-stacked > .progress > .progress-bar {
+  width: 100%;
+}
+
 @if $enable-transitions {
   .progress-bar-animated {
     animation: $progress-bar-animation-timing progress-bar-stripes;
diff --git a/scss/_reboot.scss b/scss/_reboot.scss
index 8ac7903..4226ab8 100644
--- a/scss/_reboot.scss
+++ b/scss/_reboot.scss
@@ -87,7 +87,7 @@ hr {
   font-style: $headings-font-style;
   font-weight: $headings-font-weight;
   line-height: $headings-line-height;
-  color: $headings-color;
+  color: var(--#{$prefix}heading-color);
 }
 
 h1 {
@@ -241,11 +241,11 @@ sup { top: -.5em; }
 // Links
 
 a {
-  color: var(--#{$prefix}link-color);
+  color: rgba(var(--#{$prefix}link-color-rgb), var(--#{$prefix}link-opacity, 1));
   text-decoration: $link-decoration;
 
   &:hover {
-    color: var(--#{$prefix}link-hover-color);
+    --#{$prefix}link-color-rgb: var(--#{$prefix}link-hover-color-rgb);
     text-decoration: $link-hover-decoration;
   }
 }
diff --git a/scss/_root.scss b/scss/_root.scss
index e64ae04..ab720a3 100644
--- a/scss/_root.scss
+++ b/scss/_root.scss
@@ -1,4 +1,5 @@
-:root {
+:root,
+[data-bs-theme="light"] {
   // Note: Custom variable values only support SassScript inside `#{}`.
 
   // Colors
@@ -21,10 +22,20 @@
     --#{$prefix}#{$color}-rgb: #{$value};
   }
 
+  @each $color, $value in $theme-colors-text {
+    --#{$prefix}#{$color}-text-emphasis: #{$value};
+  }
+
+  @each $color, $value in $theme-colors-bg-subtle {
+    --#{$prefix}#{$color}-bg-subtle: #{$value};
+  }
+
+  @each $color, $value in $theme-colors-border-subtle {
+    --#{$prefix}#{$color}-border-subtle: #{$value};
+  }
+
   --#{$prefix}white-rgb: #{to-rgb($white)};
   --#{$prefix}black-rgb: #{to-rgb($black)};
-  --#{$prefix}body-color-rgb: #{to-rgb($body-color)};
-  --#{$prefix}body-bg-rgb: #{to-rgb($body-bg)};
 
   // Fonts
 
@@ -39,17 +50,49 @@
   @if $font-size-root != null {
     --#{$prefix}root-font-size: #{$font-size-root};
   }
-  --#{$prefix}body-font-family: #{$font-family-base};
+  --#{$prefix}body-font-family: #{inspect($font-family-base)};
   @include rfs($font-size-base, --#{$prefix}body-font-size);
   --#{$prefix}body-font-weight: #{$font-weight-base};
   --#{$prefix}body-line-height: #{$line-height-base};
-  --#{$prefix}body-color: #{$body-color};
   @if $body-text-align != null {
     --#{$prefix}body-text-align: #{$body-text-align};
   }
+
+  --#{$prefix}body-color: #{$body-color};
+  --#{$prefix}body-color-rgb: #{to-rgb($body-color)};
   --#{$prefix}body-bg: #{$body-bg};
+  --#{$prefix}body-bg-rgb: #{to-rgb($body-bg)};
+
+  --#{$prefix}emphasis-color: #{$body-emphasis-color};
+  --#{$prefix}emphasis-color-rgb: #{to-rgb($body-emphasis-color)};
+
+  --#{$prefix}secondary-color: #{$body-secondary-color};
+  --#{$prefix}secondary-color-rgb: #{to-rgb($body-secondary-color)};
+  --#{$prefix}secondary-bg: #{$body-secondary-bg};
+  --#{$prefix}secondary-bg-rgb: #{to-rgb($body-secondary-bg)};
+
+  --#{$prefix}tertiary-color: #{$body-tertiary-color};
+  --#{$prefix}tertiary-color-rgb: #{to-rgb($body-tertiary-color)};
+  --#{$prefix}tertiary-bg: #{$body-tertiary-bg};
+  --#{$prefix}tertiary-bg-rgb: #{to-rgb($body-tertiary-bg)};
   // scss-docs-end root-body-variables
 
+  --#{$prefix}heading-color: #{$headings-color};
+
+  --#{$prefix}link-color: #{$link-color};
+  --#{$prefix}link-color-rgb: #{to-rgb($link-color)};
+  --#{$prefix}link-decoration: #{$link-decoration};
+
+  --#{$prefix}link-hover-color: #{$link-hover-color};
+  --#{$prefix}link-hover-color-rgb: #{to-rgb($link-hover-color)};
+
+  @if $link-hover-decoration != null {
+    --#{$prefix}link-hover-decoration: #{$link-hover-decoration};
+  }
+
+  --#{$prefix}code-color: #{$code-color};
+  --#{$prefix}highlight-bg: #{$mark-bg};
+
   // scss-docs-start root-border-var
   --#{$prefix}border-width: #{$border-width};
   --#{$prefix}border-style: #{$border-style};
@@ -60,14 +103,82 @@
   --#{$prefix}border-radius-sm: #{$border-radius-sm};
   --#{$prefix}border-radius-lg: #{$border-radius-lg};
   --#{$prefix}border-radius-xl: #{$border-radius-xl};
-  --#{$prefix}border-radius-2xl: #{$border-radius-2xl};
+  --#{$prefix}border-radius-xxl: #{$border-radius-xxl};
+  --#{$prefix}border-radius-2xl: var(--#{$prefix}border-radius-xxl); // Deprecated in v5.3.0 for consistency
   --#{$prefix}border-radius-pill: #{$border-radius-pill};
   // scss-docs-end root-border-var
 
-  --#{$prefix}link-color: #{$link-color};
-  --#{$prefix}link-hover-color: #{$link-hover-color};
+  --#{$prefix}box-shadow: #{$box-shadow};
+  --#{$prefix}box-shadow-sm: #{$box-shadow-sm};
+  --#{$prefix}box-shadow-lg: #{$box-shadow-lg};
+  --#{$prefix}box-shadow-inset: #{$box-shadow-inset};
 
-  --#{$prefix}code-color: #{$code-color};
+  // Focus styles
+  // scss-docs-start root-focus-variables
+  --#{$prefix}focus-ring-width: #{$focus-ring-width};
+  --#{$prefix}focus-ring-opacity: #{$focus-ring-opacity};
+  --#{$prefix}focus-ring-color: #{$focus-ring-color};
+  // scss-docs-end root-focus-variables
 
-  --#{$prefix}highlight-bg: #{$mark-bg};
+  // scss-docs-start root-form-validation-variables
+  --#{$prefix}form-valid-color: #{$form-valid-color};
+  --#{$prefix}form-valid-border-color: #{$form-valid-border-color};
+  --#{$prefix}form-invalid-color: #{$form-invalid-color};
+  --#{$prefix}form-invalid-border-color: #{$form-invalid-border-color};
+  // scss-docs-end root-form-validation-variables
+}
+
+@if $enable-dark-mode {
+  @include color-mode(dark, true) {
+    color-scheme: dark;
+
+    // scss-docs-start root-dark-mode-vars
+    --#{$prefix}body-color: #{$body-color-dark};
+    --#{$prefix}body-color-rgb: #{to-rgb($body-color-dark)};
+    --#{$prefix}body-bg: #{$body-bg-dark};
+    --#{$prefix}body-bg-rgb: #{to-rgb($body-bg-dark)};
+
+    --#{$prefix}emphasis-color: #{$body-emphasis-color-dark};
+    --#{$prefix}emphasis-color-rgb: #{to-rgb($body-emphasis-color-dark)};
+
+    --#{$prefix}secondary-color: #{$body-secondary-color-dark};
+    --#{$prefix}secondary-color-rgb: #{to-rgb($body-secondary-color-dark)};
+    --#{$prefix}secondary-bg: #{$body-secondary-bg-dark};
+    --#{$prefix}secondary-bg-rgb: #{to-rgb($body-secondary-bg-dark)};
+
+    --#{$prefix}tertiary-color: #{$body-tertiary-color-dark};
+    --#{$prefix}tertiary-color-rgb: #{to-rgb($body-tertiary-color-dark)};
+    --#{$prefix}tertiary-bg: #{$body-tertiary-bg-dark};
+    --#{$prefix}tertiary-bg-rgb: #{to-rgb($body-tertiary-bg-dark)};
+
+    @each $color, $value in $theme-colors-text-dark {
+      --#{$prefix}#{$color}-text-emphasis: #{$value};
+    }
+
+    @each $color, $value in $theme-colors-bg-subtle-dark {
+      --#{$prefix}#{$color}-bg-subtle: #{$value};
+    }
+
+    @each $color, $value in $theme-colors-border-subtle-dark {
+      --#{$prefix}#{$color}-border-subtle: #{$value};
+    }
+
+    --#{$prefix}heading-color: #{$headings-color-dark};
+
+    --#{$prefix}link-color: #{$link-color-dark};
+    --#{$prefix}link-hover-color: #{$link-hover-color-dark};
+    --#{$prefix}link-color-rgb: #{to-rgb($link-color-dark)};
+    --#{$prefix}link-hover-color-rgb: #{to-rgb($link-hover-color-dark)};
+
+    --#{$prefix}code-color: #{$code-color-dark};
+
+    --#{$prefix}border-color: #{$border-color-dark};
+    --#{$prefix}border-color-translucent: #{$border-color-translucent-dark};
+
+    --#{$prefix}form-valid-color: #{$form-valid-color-dark};
+    --#{$prefix}form-valid-border-color: #{$form-valid-border-color-dark};
+    --#{$prefix}form-invalid-color: #{$form-invalid-color-dark};
+    --#{$prefix}form-invalid-border-color: #{$form-invalid-border-color-dark};
+    // scss-docs-end root-dark-mode-vars
+  }
 }
diff --git a/scss/_tables.scss b/scss/_tables.scss
index 1fdd43c..ebfc00a 100644
--- a/scss/_tables.scss
+++ b/scss/_tables.scss
@@ -3,6 +3,12 @@
 //
 
 .table {
+  // Reset needed for nesting tables
+  --#{$prefix}table-color-type: initial;
+  --#{$prefix}table-bg-type: initial;
+  --#{$prefix}table-color-state: initial;
+  --#{$prefix}table-bg-state: initial;
+  // End of reset
   --#{$prefix}table-color: #{$table-color};
   --#{$prefix}table-bg: #{$table-bg};
   --#{$prefix}table-border-color: #{$table-border-color};
@@ -16,7 +22,6 @@
 
   width: 100%;
   margin-bottom: $spacer;
-  color: var(--#{$prefix}table-color);
   vertical-align: $table-cell-vertical-align;
   border-color: var(--#{$prefix}table-border-color);
 
@@ -27,9 +32,11 @@
   // stylelint-disable-next-line selector-max-universal
   > :not(caption) > * > * {
     padding: $table-cell-padding-y $table-cell-padding-x;
+    // Following the precept of cascades: https://codepen.io/miriamsuzanne/full/vYNgodb
+    color: var(--#{$prefix}table-color-state, var(--#{$prefix}table-color-type, var(--#{$prefix}table-color)));
     background-color: var(--#{$prefix}table-bg);
     border-bottom-width: $table-border-width;
-    box-shadow: inset 0 0 0 9999px var(--#{$prefix}table-accent-bg);
+    box-shadow: inset 0 0 0 9999px var(--#{$prefix}table-bg-state, var(--#{$prefix}table-bg-type, var(--#{$prefix}table-accent-bg)));
   }
 
   > tbody {
@@ -42,7 +49,7 @@
 }
 
 .table-group-divider {
-  border-top: ($table-border-width * 2) solid $table-group-separator-color;
+  border-top: calc(#{$table-border-width} * 2) solid $table-group-separator-color; // stylelint-disable-line function-disallowed-list
 }
 
 //
@@ -104,16 +111,16 @@
 // For rows
 .table-striped {
   > tbody > tr:nth-of-type(#{$table-striped-order}) > * {
-    --#{$prefix}table-accent-bg: var(--#{$prefix}table-striped-bg);
-    color: var(--#{$prefix}table-striped-color);
+    --#{$prefix}table-color-type: var(--#{$prefix}table-striped-color);
+    --#{$prefix}table-bg-type: var(--#{$prefix}table-striped-bg);
   }
 }
 
 // For columns
 .table-striped-columns {
   > :not(caption) > tr > :nth-child(#{$table-striped-columns-order}) {
-    --#{$prefix}table-accent-bg: var(--#{$prefix}table-striped-bg);
-    color: var(--#{$prefix}table-striped-color);
+    --#{$prefix}table-color-type: var(--#{$prefix}table-striped-color);
+    --#{$prefix}table-bg-type: var(--#{$prefix}table-striped-bg);
   }
 }
 
@@ -122,8 +129,8 @@
 // The `.table-active` class can be added to highlight rows or cells
 
 .table-active {
-  --#{$prefix}table-accent-bg: var(--#{$prefix}table-active-bg);
-  color: var(--#{$prefix}table-active-color);
+  --#{$prefix}table-color-state: var(--#{$prefix}table-active-color);
+  --#{$prefix}table-bg-state: var(--#{$prefix}table-active-bg);
 }
 
 // Hover effect
@@ -132,8 +139,8 @@
 
 .table-hover {
   > tbody > tr:hover > * {
-    --#{$prefix}table-accent-bg: var(--#{$prefix}table-hover-bg);
-    color: var(--#{$prefix}table-hover-color);
+    --#{$prefix}table-color-state: var(--#{$prefix}table-hover-color);
+    --#{$prefix}table-bg-state: var(--#{$prefix}table-hover-bg);
   }
 }
 
diff --git a/scss/_tooltip.scss b/scss/_tooltip.scss
index 7da3df3..85de90f 100644
--- a/scss/_tooltip.scss
+++ b/scss/_tooltip.scss
@@ -17,7 +17,6 @@
 
   z-index: var(--#{$prefix}tooltip-zindex);
   display: block;
-  padding: var(--#{$prefix}tooltip-arrow-height);
   margin: var(--#{$prefix}tooltip-margin);
   @include deprecate("`$tooltip-margin`", "v5", "v5.x", true);
   // Our parent element can be arbitrary since tooltips are by default inserted as a sibling of their target element.
@@ -45,7 +44,7 @@
 }
 
 .bs-tooltip-top .tooltip-arrow {
-  bottom: 0;
+  bottom: calc(-1 * var(--#{$prefix}tooltip-arrow-height)); // stylelint-disable-line function-disallowed-list
 
   &::before {
     top: -1px;
@@ -56,7 +55,7 @@
 
 /* rtl:begin:ignore */
 .bs-tooltip-end .tooltip-arrow {
-  left: 0;
+  left: calc(-1 * var(--#{$prefix}tooltip-arrow-height)); // stylelint-disable-line function-disallowed-list
   width: var(--#{$prefix}tooltip-arrow-height);
   height: var(--#{$prefix}tooltip-arrow-width);
 
@@ -70,7 +69,7 @@
 /* rtl:end:ignore */
 
 .bs-tooltip-bottom .tooltip-arrow {
-  top: 0;
+  top: calc(-1 * var(--#{$prefix}tooltip-arrow-height)); // stylelint-disable-line function-disallowed-list
 
   &::before {
     bottom: -1px;
@@ -81,7 +80,7 @@
 
 /* rtl:begin:ignore */
 .bs-tooltip-start .tooltip-arrow {
-  right: 0;
+  right: calc(-1 * var(--#{$prefix}tooltip-arrow-height)); // stylelint-disable-line function-disallowed-list
   width: var(--#{$prefix}tooltip-arrow-height);
   height: var(--#{$prefix}tooltip-arrow-width);
 
diff --git a/scss/_utilities.scss b/scss/_utilities.scss
index 1e0d141..e6069c9 100644
--- a/scss/_utilities.scss
+++ b/scss/_utilities.scss
@@ -22,6 +22,20 @@ $utilities: map-merge(
       )
     ),
     // scss-docs-end utils-float
+    // Object Fit utilities
+    // scss-docs-start utils-object-fit
+    "object-fit": (
+      responsive: true,
+      property: object-fit,
+      values: (
+        contain: contain,
+        cover: cover,
+        fill: fill,
+        scale: scale-down,
+        none: none,
+      )
+    ),
+    // scss-docs-end utils-object-fit
     // Opacity utilities
     // scss-docs-start utils-opacity
     "opacity": (
@@ -40,6 +54,14 @@ $utilities: map-merge(
       property: overflow,
       values: auto hidden visible scroll,
     ),
+    "overflow-x": (
+      property: overflow-x,
+      values: auto hidden visible scroll,
+    ),
+    "overflow-y": (
+      property: overflow-y,
+      values: auto hidden visible scroll,
+    ),
     // scss-docs-end utils-overflow
     // scss-docs-start utils-display
     "display": (
@@ -47,7 +69,7 @@ $utilities: map-merge(
       print: true,
       property: display,
       class: d,
-      values: inline inline-block block grid table table-row table-cell flex inline-flex none
+      values: inline inline-block block grid inline-grid table table-row table-cell flex inline-flex none
     ),
     // scss-docs-end utils-display
     // scss-docs-start utils-shadow
@@ -62,6 +84,14 @@ $utilities: map-merge(
       )
     ),
     // scss-docs-end utils-shadow
+    // scss-docs-start utils-focus-ring
+    "focus-ring": (
+      css-var: true,
+      css-variable-name: focus-ring-color,
+      class: focus-ring,
+      values: map-loop($theme-colors-rgb, rgba-css-var, "$key", "focus-ring")
+    ),
+    // scss-docs-end utils-focus-ring
     // scss-docs-start utils-position
     "position": (
       property: position,
@@ -141,9 +171,13 @@ $utilities: map-merge(
       ),
       values: $utilities-border-colors
     ),
+    "subtle-border-color": (
+      property: border-color,
+      class: border,
+      values: $utilities-border-subtle
+    ),
     "border-width": (
-      css-var: true,
-      css-variable-name: border-width,
+      property: border-width,
       class: border,
       values: $border-widths
     ),
@@ -450,6 +484,18 @@ $utilities: map-merge(
       class: gap,
       values: $spacers
     ),
+    "row-gap": (
+      responsive: true,
+      property: row-gap,
+      class: row-gap,
+      values: $spacers
+    ),
+    "column-gap": (
+      responsive: true,
+      property: column-gap,
+      class: column-gap,
+      values: $spacers
+    ),
     // scss-docs-end utils-spacing
     // Text
     // scss-docs-start utils-text
@@ -473,11 +519,12 @@ $utilities: map-merge(
       property: font-weight,
       class: fw,
       values: (
-        light: $font-weight-light,
         lighter: $font-weight-lighter,
+        light: $font-weight-light,
         normal: $font-weight-normal,
-        bold: $font-weight-bold,
+        medium: $font-weight-medium,
         semibold: $font-weight-semibold,
+        bold: $font-weight-bold,
         bolder: $font-weight-bolder
       )
     ),
@@ -535,9 +582,12 @@ $utilities: map-merge(
       values: map-merge(
         $utilities-text-colors,
         (
-          "muted": $text-muted,
+          "muted": var(--#{$prefix}secondary-color), // deprecated
           "black-50": rgba($black, .5), // deprecated
           "white-50": rgba($white, .5), // deprecated
+          "body-secondary": var(--#{$prefix}secondary-color),
+          "body-tertiary": var(--#{$prefix}tertiary-color),
+          "body-emphasis": var(--#{$prefix}emphasis-color),
           "reset": inherit,
         )
       )
@@ -552,7 +602,62 @@ $utilities: map-merge(
         100: 1
       )
     ),
+    "text-color": (
+      property: color,
+      class: text,
+      values: $utilities-text-emphasis-colors
+    ),
     // scss-docs-end utils-color
+    // scss-docs-start utils-links
+    "link-opacity": (
+      css-var: true,
+      class: link-opacity,
+      state: hover,
+      values: (
+        10: .1,
+        25: .25,
+        50: .5,
+        75: .75,
+        100: 1
+      )
+    ),
+    "link-offset": (
+      property: text-underline-offset,
+      class: link-offset,
+      state: hover,
+      values: (
+        1: .125em,
+        2: .25em,
+        3: .375em,
+      )
+    ),
+    "link-underline": (
+      property: text-decoration-color,
+      class: link-underline,
+      local-vars: (
+        "link-underline-opacity": 1
+      ),
+      values: map-merge(
+        $utilities-links-underline,
+        (
+          null: rgba(var(--#{$prefix}link-color-rgb), var(--#{$prefix}link-underline-opacity, 1)),
+        )
+      )
+    ),
+    "link-underline-opacity": (
+      css-var: true,
+      class: link-underline-opacity,
+      state: hover,
+      values: (
+        0: 0,
+        10: .1,
+        25: .25,
+        50: .5,
+        75: .75,
+        100: 1
+      ),
+    ),
+    // scss-docs-end utils-links
     // scss-docs-start utils-bg-color
     "background-color": (
       property: background-color,
@@ -563,7 +668,9 @@ $utilities: map-merge(
       values: map-merge(
         $utilities-bg-colors,
         (
-          "transparent": transparent
+          "transparent": transparent,
+          "body-secondary": rgba(var(--#{$prefix}secondary-bg-rgb), var(--#{$prefix}bg-opacity)),
+          "body-tertiary": rgba(var(--#{$prefix}tertiary-bg-rgb), var(--#{$prefix}bg-opacity)),
         )
       )
     ),
@@ -578,6 +685,11 @@ $utilities: map-merge(
         100: 1
       )
     ),
+    "subtle-background-color": (
+      property: background-color,
+      class: bg,
+      values: $utilities-bg-subtle
+    ),
     // scss-docs-end utils-bg-color
     "gradient": (
       property: background-image,
@@ -606,7 +718,7 @@ $utilities: map-merge(
         2: var(--#{$prefix}border-radius),
         3: var(--#{$prefix}border-radius-lg),
         4: var(--#{$prefix}border-radius-xl),
-        5: var(--#{$prefix}border-radius-2xl),
+        5: var(--#{$prefix}border-radius-xxl),
         circle: 50%,
         pill: var(--#{$prefix}border-radius-pill)
       )
@@ -614,22 +726,62 @@ $utilities: map-merge(
     "rounded-top": (
       property: border-top-left-radius border-top-right-radius,
       class: rounded-top,
-      values: (null: var(--#{$prefix}border-radius))
+      values: (
+        null: var(--#{$prefix}border-radius),
+        0: 0,
+        1: var(--#{$prefix}border-radius-sm),
+        2: var(--#{$prefix}border-radius),
+        3: var(--#{$prefix}border-radius-lg),
+        4: var(--#{$prefix}border-radius-xl),
+        5: var(--#{$prefix}border-radius-xxl),
+        circle: 50%,
+        pill: var(--#{$prefix}border-radius-pill)
+      )
     ),
     "rounded-end": (
       property: border-top-right-radius border-bottom-right-radius,
       class: rounded-end,
-      values: (null: var(--#{$prefix}border-radius))
+      values: (
+        null: var(--#{$prefix}border-radius),
+        0: 0,
+        1: var(--#{$prefix}border-radius-sm),
+        2: var(--#{$prefix}border-radius),
+        3: var(--#{$prefix}border-radius-lg),
+        4: var(--#{$prefix}border-radius-xl),
+        5: var(--#{$prefix}border-radius-xxl),
+        circle: 50%,
+        pill: var(--#{$prefix}border-radius-pill)
+      )
     ),
     "rounded-bottom": (
       property: border-bottom-right-radius border-bottom-left-radius,
       class: rounded-bottom,
-      values: (null: var(--#{$prefix}border-radius))
+      values: (
+        null: var(--#{$prefix}border-radius),
+        0: 0,
+        1: var(--#{$prefix}border-radius-sm),
+        2: var(--#{$prefix}border-radius),
+        3: var(--#{$prefix}border-radius-lg),
+        4: var(--#{$prefix}border-radius-xl),
+        5: var(--#{$prefix}border-radius-xxl),
+        circle: 50%,
+        pill: var(--#{$prefix}border-radius-pill)
+      )
     ),
     "rounded-start": (
       property: border-bottom-left-radius border-top-left-radius,
       class: rounded-start,
-      values: (null: var(--#{$prefix}border-radius))
+      values: (
+        null: var(--#{$prefix}border-radius),
+        0: 0,
+        1: var(--#{$prefix}border-radius-sm),
+        2: var(--#{$prefix}border-radius),
+        3: var(--#{$prefix}border-radius-lg),
+        4: var(--#{$prefix}border-radius-xl),
+        5: var(--#{$prefix}border-radius-xxl),
+        circle: 50%,
+        pill: var(--#{$prefix}border-radius-pill)
+      )
     ),
     // scss-docs-end utils-border-radius
     // scss-docs-start utils-visibility
@@ -640,8 +792,15 @@ $utilities: map-merge(
         visible: visible,
         invisible: hidden,
       )
-    )
+    ),
     // scss-docs-end utils-visibility
+    // scss-docs-start utils-zindex
+    "z-index": (
+      property: z-index,
+      class: z,
+      values: $zindex-levels,
+    )
+    // scss-docs-end utils-zindex
   ),
   $utilities
 );
diff --git a/scss/_variables-dark.scss b/scss/_variables-dark.scss
new file mode 100644
index 0000000..494eefa
--- /dev/null
+++ b/scss/_variables-dark.scss
@@ -0,0 +1,85 @@
+// Dark color mode variables
+//
+// Custom variables for the `[data-bs-theme="dark"]` theme. Use this as a starting point for your own custom color modes by creating a new theme-specific file like `_variables-dark.scss` and adding the variables you need.
+
+//
+// Global colors
+//
+
+// scss-docs-start sass-dark-mode-vars
+// scss-docs-start theme-text-dark-variables
+$primary-text-emphasis-dark:        tint-color($primary, 40%) !default;
+$secondary-text-emphasis-dark:      tint-color($secondary, 40%) !default;
+$success-text-emphasis-dark:        tint-color($success, 40%) !default;
+$info-text-emphasis-dark:           tint-color($info, 40%) !default;
+$warning-text-emphasis-dark:        tint-color($warning, 40%) !default;
+$danger-text-emphasis-dark:         tint-color($danger, 40%) !default;
+$light-text-emphasis-dark:          $gray-100 !default;
+$dark-text-emphasis-dark:           $gray-300 !default;
+// scss-docs-end theme-text-dark-variables
+
+// scss-docs-start theme-bg-subtle-dark-variables
+$primary-bg-subtle-dark:            shade-color($primary, 80%) !default;
+$secondary-bg-subtle-dark:          shade-color($secondary, 80%) !default;
+$success-bg-subtle-dark:            shade-color($success, 80%) !default;
+$info-bg-subtle-dark:               shade-color($info, 80%) !default;
+$warning-bg-subtle-dark:            shade-color($warning, 80%) !default;
+$danger-bg-subtle-dark:             shade-color($danger, 80%) !default;
+$light-bg-subtle-dark:              $gray-800 !default;
+$dark-bg-subtle-dark:               mix($gray-800, $black) !default;
+// scss-docs-end theme-bg-subtle-dark-variables
+
+// scss-docs-start theme-border-subtle-dark-variables
+$primary-border-subtle-dark:        shade-color($primary, 40%) !default;
+$secondary-border-subtle-dark:      shade-color($secondary, 40%) !default;
+$success-border-subtle-dark:        shade-color($success, 40%) !default;
+$info-border-subtle-dark:           shade-color($info, 40%) !default;
+$warning-border-subtle-dark:        shade-color($warning, 40%) !default;
+$danger-border-subtle-dark:         shade-color($danger, 40%) !default;
+$light-border-subtle-dark:          $gray-700 !default;
+$dark-border-subtle-dark:           $gray-800 !default;
+// scss-docs-end theme-border-subtle-dark-variables
+
+$body-color-dark:                   $gray-500 !default;
+$body-bg-dark:                      $gray-900 !default;
+$body-secondary-color-dark:         rgba($body-color-dark, .75) !default;
+$body-secondary-bg-dark:            $gray-800 !default;
+$body-tertiary-color-dark:          rgba($body-color-dark, .5) !default;
+$body-tertiary-bg-dark:             mix($gray-800, $gray-900, 50%) !default;
+$body-emphasis-color-dark:          $white !default;
+$border-color-dark:                 $gray-700 !default;
+$border-color-translucent-dark:     rgba($white, .15) !default;
+$headings-color-dark:               inherit !default;
+$link-color-dark:                   tint-color($primary, 40%) !default;
+$link-hover-color-dark:             shift-color($link-color-dark, -$link-shade-percentage) !default;
+$code-color-dark:                   tint-color($code-color, 40%) !default;
+
+
+//
+// Forms
+//
+
+$form-select-indicator-color-dark:  $body-color-dark !default;
+$form-select-indicator-dark:        url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path fill='none' stroke='#{$form-select-indicator-color-dark}' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/></svg>") !default;
+
+$form-switch-color-dark:            rgba($white, .25) !default;
+$form-switch-bg-image-dark:         url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'><circle r='3' fill='#{$form-switch-color-dark}'/></svg>") !default;
+
+// scss-docs-start form-validation-colors-dark
+$form-valid-color-dark:             $green-300 !default;
+$form-valid-border-color-dark:      $green-300 !default;
+$form-invalid-color-dark:           $red-300 !default;
+$form-invalid-border-color-dark:    $red-300 !default;
+// scss-docs-end form-validation-colors-dark
+
+
+//
+// Accordion
+//
+
+$accordion-icon-color-dark:         $primary-text-emphasis-dark !default;
+$accordion-icon-active-color-dark:  $primary-text-emphasis-dark !default;
+
+$accordion-button-icon-dark:         url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$accordion-icon-color-dark}'><path fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/></svg>") !default;
+$accordion-button-active-icon-dark:  url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$accordion-icon-active-color-dark}'><path fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/></svg>") !default;
+// scss-docs-end sass-dark-mode-vars
diff --git a/scss/_variables.scss b/scss/_variables.scss
index e021836..0288898 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -321,6 +321,39 @@ $theme-colors: (
 ) !default;
 // scss-docs-end theme-colors-map
 
+// scss-docs-start theme-text-variables
+$primary-text-emphasis:   shade-color($primary, 60%) !default;
+$secondary-text-emphasis: shade-color($secondary, 60%) !default;
+$success-text-emphasis:   shade-color($success, 60%) !default;
+$info-text-emphasis:      shade-color($info, 60%) !default;
+$warning-text-emphasis:   shade-color($warning, 60%) !default;
+$danger-text-emphasis:    shade-color($danger, 60%) !default;
+$light-text-emphasis:     $gray-700 !default;
+$dark-text-emphasis:      $gray-700 !default;
+// scss-docs-end theme-text-variables
+
+// scss-docs-start theme-bg-subtle-variables
+$primary-bg-subtle:       tint-color($primary, 80%) !default;
+$secondary-bg-subtle:     tint-color($secondary, 80%) !default;
+$success-bg-subtle:       tint-color($success, 80%) !default;
+$info-bg-subtle:          tint-color($info, 80%) !default;
+$warning-bg-subtle:       tint-color($warning, 80%) !default;
+$danger-bg-subtle:        tint-color($danger, 80%) !default;
+$light-bg-subtle:         mix($gray-100, $white) !default;
+$dark-bg-subtle:          $gray-400 !default;
+// scss-docs-end theme-bg-subtle-variables
+
+// scss-docs-start theme-border-subtle-variables
+$primary-border-subtle:   tint-color($primary, 60%) !default;
+$secondary-border-subtle: tint-color($secondary, 60%) !default;
+$success-border-subtle:   tint-color($success, 60%) !default;
+$info-border-subtle:      tint-color($info, 60%) !default;
+$warning-border-subtle:   tint-color($warning, 60%) !default;
+$danger-border-subtle:    tint-color($danger, 60%) !default;
+$light-border-subtle:     $gray-200 !default;
+$dark-border-subtle:      $gray-500 !default;
+// scss-docs-end theme-border-subtle-variables
+
 // Characters which are escaped by the escape-svg function
 $escaped-characters: (
   ("<", "%3c"),
@@ -351,6 +384,9 @@ $enable-negative-margins:     false !default;
 $enable-deprecation-messages: true !default;
 $enable-important-utilities:  true !default;
 
+$enable-dark-mode:            true !default;
+$color-mode-type:             data !default; // `data` or `media-query`
+
 // Prefix for :root CSS variables
 
 $variable-prefix:             bs- !default; // Deprecated in v5.2.0 for the shorter `$prefix`
@@ -398,9 +434,17 @@ $position-values: (
 //
 // Settings for the `<body>` element.
 
-$body-bg:                   $white !default;
-$body-color:                $gray-900 !default;
 $body-text-align:           null !default;
+$body-color:                $gray-900 !default;
+$body-bg:                   $white !default;
+
+$body-secondary-color:      rgba($body-color, .75) !default;
+$body-secondary-bg:         $gray-200 !default;
+
+$body-tertiary-color:       rgba($body-color, .5) !default;
+$body-tertiary-bg:          $gray-100 !default;
+
+$body-emphasis-color:       $black !default;
 
 // Links
 //
@@ -415,6 +459,15 @@ $link-hover-decoration:                   null !default;
 $stretched-link-pseudo-element:           after !default;
 $stretched-link-z-index:                  1 !default;
 
+// Icon links
+// scss-docs-start icon-link-variables
+$icon-link-gap:               .375rem !default;
+$icon-link-underline-offset:  .25em !default;
+$icon-link-icon-size:         1em !default;
+$icon-link-icon-transition:   .2s ease-in-out transform !default;
+$icon-link-icon-transform:    translate3d(.25em, 0, 0) !default;
+// scss-docs-end icon-link-variables
+
 // Paragraphs
 //
 // Style p element.
@@ -485,7 +538,6 @@ $border-widths: (
   4: 4px,
   5: 5px
 ) !default;
-
 $border-style:                solid !default;
 $border-color:                $gray-300 !default;
 $border-color-translucent:    rgba($black, .175) !default;
@@ -496,9 +548,12 @@ $border-radius:               .375rem !default;
 $border-radius-sm:            .25rem !default;
 $border-radius-lg:            .5rem !default;
 $border-radius-xl:            1rem !default;
-$border-radius-2xl:           2rem !default;
+$border-radius-xxl:           2rem !default;
 $border-radius-pill:          50rem !default;
 // scss-docs-end border-radius-variables
+// fusv-disable
+$border-radius-2xl:           $border-radius-xxl !default; // Deprecated in v5.3.0
+// fusv-enable
 
 // scss-docs-start box-shadow-variables
 $box-shadow:                  0 .5rem 1rem rgba($black, .15) !default;
@@ -510,6 +565,14 @@ $box-shadow-inset:            inset 0 1px 2px rgba($black, .075) !default;
 $component-active-color:      $white !default;
 $component-active-bg:         $primary !default;
 
+// scss-docs-start focus-ring-variables
+$focus-ring-width:      .25rem !default;
+$focus-ring-opacity:    .25 !default;
+$focus-ring-color:      rgba($primary, $focus-ring-opacity) !default;
+$focus-ring-blur:       0 !default;
+$focus-ring-box-shadow: 0 0 $focus-ring-blur $focus-ring-width $focus-ring-color !default;
+// scss-docs-end focus-ring-variables
+
 // scss-docs-start caret-variables
 $caret-width:                 .3em !default;
 $caret-vertical-align:        $caret-width * .85 !default;
@@ -556,6 +619,7 @@ $font-size-lg:                $font-size-base * 1.25 !default;
 $font-weight-lighter:         lighter !default;
 $font-weight-light:           300 !default;
 $font-weight-normal:          400 !default;
+$font-weight-medium:          500 !default;
 $font-weight-semibold:        600 !default;
 $font-weight-bold:            700 !default;
 $font-weight-bolder:          bolder !default;
@@ -591,7 +655,7 @@ $headings-font-family:        null !default;
 $headings-font-style:         null !default;
 $headings-font-weight:        500 !default;
 $headings-line-height:        1.2 !default;
-$headings-color:              null !default;
+$headings-color:              inherit !default;
 // scss-docs-end headings-variables
 
 // scss-docs-start display-headings
@@ -618,7 +682,9 @@ $small-font-size:             .875em !default;
 
 $sub-sup-font-size:           .75em !default;
 
-$text-muted:                  $gray-600 !default;
+// fusv-disable
+$text-muted:                  var(--#{$prefix}secondary-color) !default; // Deprecated in 5.3.0
+// fusv-enable
 
 $initialism-font-size:        $small-font-size !default;
 
@@ -636,7 +702,7 @@ $hr-height:                   null !default; // Deprecated in v5.2.0
 // fusv-enable
 
 $hr-border-color:             null !default; // Allows for inherited colors
-$hr-border-width:             $border-width !default;
+$hr-border-width:             var(--#{$prefix}border-width) !default;
 $hr-opacity:                  .25 !default;
 
 $legend-margin-bottom:        .5rem !default;
@@ -665,7 +731,7 @@ $table-cell-padding-x-sm:     .25rem !default;
 $table-cell-vertical-align:   top !default;
 
 $table-color:                 var(--#{$prefix}body-color) !default;
-$table-bg:                    transparent !default;
+$table-bg:                    var(--#{$prefix}body-bg) !default;
 $table-accent-bg:             transparent !default;
 
 $table-th-font-weight:        null !default;
@@ -683,7 +749,7 @@ $table-hover-bg-factor:       .075 !default;
 $table-hover-bg:              rgba($black, $table-hover-bg-factor) !default;
 
 $table-border-factor:         .1 !default;
-$table-border-width:          $border-width !default;
+$table-border-width:          var(--#{$prefix}border-width) !default;
 $table-border-color:          var(--#{$prefix}border-color) !default;
 
 $table-striped-order:         odd !default;
@@ -691,7 +757,7 @@ $table-striped-columns-order: even !default;
 
 $table-group-separator-color: currentcolor !default;
 
-$table-caption-color:         $text-muted !default;
+$table-caption-color:         var(--#{$prefix}secondary-color) !default;
 
 $table-bg-scale:              -80% !default;
 // scss-docs-end table-variables
@@ -721,11 +787,11 @@ $input-btn-font-family:       null !default;
 $input-btn-font-size:         $font-size-base !default;
 $input-btn-line-height:       $line-height-base !default;
 
-$input-btn-focus-width:         .25rem !default;
-$input-btn-focus-color-opacity: .25 !default;
-$input-btn-focus-color:         rgba($component-active-bg, $input-btn-focus-color-opacity) !default;
-$input-btn-focus-blur:          0 !default;
-$input-btn-focus-box-shadow:    0 0 $input-btn-focus-blur $input-btn-focus-width $input-btn-focus-color !default;
+$input-btn-focus-width:         $focus-ring-width !default;
+$input-btn-focus-color-opacity: $focus-ring-opacity !default;
+$input-btn-focus-color:         $focus-ring-color !default;
+$input-btn-focus-blur:          $focus-ring-blur !default;
+$input-btn-focus-box-shadow:    $focus-ring-box-shadow !default;
 
 $input-btn-padding-y-sm:      .25rem !default;
 $input-btn-padding-x-sm:      .5rem !default;
@@ -735,7 +801,7 @@ $input-btn-padding-y-lg:      .5rem !default;
 $input-btn-padding-x-lg:      1rem !default;
 $input-btn-font-size-lg:      $font-size-lg !default;
 
-$input-btn-border-width:      $border-width !default;
+$input-btn-border-width:      var(--#{$prefix}border-width) !default;
 // scss-docs-end input-btn-variables
 
 
@@ -744,6 +810,7 @@ $input-btn-border-width:      $border-width !default;
 // For each of Bootstrap's buttons, define text, background, and border color.
 
 // scss-docs-start btn-variables
+$btn-color:                   var(--#{$prefix}body-color) !default;
 $btn-padding-y:               $input-btn-padding-y !default;
 $btn-padding-x:               $input-btn-padding-x !default;
 $btn-font-family:             $input-btn-font-family !default;
@@ -773,9 +840,9 @@ $btn-link-hover-color:        var(--#{$prefix}link-hover-color) !default;
 $btn-link-disabled-color:     $gray-600 !default;
 
 // Allows for customizing button radius independently from global border radius
-$btn-border-radius:           $border-radius !default;
-$btn-border-radius-sm:        $border-radius-sm !default;
-$btn-border-radius-lg:        $border-radius-lg !default;
+$btn-border-radius:           var(--#{$prefix}border-radius) !default;
+$btn-border-radius-sm:        var(--#{$prefix}border-radius-sm) !default;
+$btn-border-radius-lg:        var(--#{$prefix}border-radius-lg) !default;
 
 $btn-transition:              color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out !default;
 
@@ -797,7 +864,7 @@ $form-text-margin-top:                  .25rem !default;
 $form-text-font-size:                   $small-font-size !default;
 $form-text-font-style:                  null !default;
 $form-text-font-weight:                 null !default;
-$form-text-color:                       $text-muted !default;
+$form-text-color:                       var(--#{$prefix}secondary-color) !default;
 // scss-docs-end form-text-variables
 
 // scss-docs-start form-label-variables
@@ -824,19 +891,19 @@ $input-padding-y-lg:                    $input-btn-padding-y-lg !default;
 $input-padding-x-lg:                    $input-btn-padding-x-lg !default;
 $input-font-size-lg:                    $input-btn-font-size-lg !default;
 
-$input-bg:                              $body-bg !default;
+$input-bg:                              var(--#{$prefix}body-bg) !default;
 $input-disabled-color:                  null !default;
-$input-disabled-bg:                     $gray-200 !default;
+$input-disabled-bg:                     var(--#{$prefix}secondary-bg) !default;
 $input-disabled-border-color:           null !default;
 
-$input-color:                           $body-color !default;
-$input-border-color:                    $gray-400 !default;
+$input-color:                           var(--#{$prefix}body-color) !default;
+$input-border-color:                    var(--#{$prefix}border-color) !default;
 $input-border-width:                    $input-btn-border-width !default;
 $input-box-shadow:                      $box-shadow-inset !default;
 
-$input-border-radius:                   $border-radius !default;
-$input-border-radius-sm:                $border-radius-sm !default;
-$input-border-radius-lg:                $border-radius-lg !default;
+$input-border-radius:                   var(--#{$prefix}border-radius) !default;
+$input-border-radius-sm:                var(--#{$prefix}border-radius-sm) !default;
+$input-border-radius-lg:                var(--#{$prefix}border-radius-lg) !default;
 
 $input-focus-bg:                        $input-bg !default;
 $input-focus-border-color:              tint-color($component-active-bg, 50%) !default;
@@ -844,10 +911,10 @@ $input-focus-color:                     $input-color !default;
 $input-focus-width:                     $input-btn-focus-width !default;
 $input-focus-box-shadow:                $input-btn-focus-box-shadow !default;
 
-$input-placeholder-color:               $gray-600 !default;
-$input-plaintext-color:                 $body-color !default;
+$input-placeholder-color:               var(--#{$prefix}secondary-color) !default;
+$input-plaintext-color:                 var(--#{$prefix}body-color) !default;
 
-$input-height-border:                   $input-border-width * 2 !default;
+$input-height-border:                   calc(#{$input-border-width} * 2) !default; // stylelint-disable-line function-disallowed-list
 
 $input-height-inner:                    add($input-line-height * 1em, $input-padding-y * 2) !default;
 $input-height-inner-half:               add($input-line-height * .5em, $input-padding-y) !default;
@@ -874,11 +941,11 @@ $form-check-transition:                   null !default;
 $form-check-input-active-filter:          brightness(90%) !default;
 
 $form-check-input-bg:                     $input-bg !default;
-$form-check-input-border:                 1px solid rgba($black, .25) !default;
+$form-check-input-border:                 var(--#{$prefix}border-width) solid var(--#{$prefix}border-color) !default;
 $form-check-input-border-radius:          .25em !default;
 $form-check-radio-border-radius:          50% !default;
 $form-check-input-focus-border:           $input-focus-border-color !default;
-$form-check-input-focus-box-shadow:       $input-btn-focus-box-shadow !default;
+$form-check-input-focus-box-shadow:       $focus-ring-box-shadow !default;
 
 $form-check-input-checked-color:          $component-active-color !default;
 $form-check-input-checked-bg-color:       $component-active-bg !default;
@@ -919,7 +986,7 @@ $input-group-addon-padding-y:           $input-padding-y !default;
 $input-group-addon-padding-x:           $input-padding-x !default;
 $input-group-addon-font-weight:         $input-font-weight !default;
 $input-group-addon-color:               $input-color !default;
-$input-group-addon-bg:                  $gray-200 !default;
+$input-group-addon-bg:                  var(--#{$prefix}tertiary-bg) !default;
 $input-group-addon-border-color:        $input-border-color !default;
 // scss-docs-end input-group-variables
 
@@ -934,7 +1001,7 @@ $form-select-line-height:           $input-line-height !default;
 $form-select-color:                 $input-color !default;
 $form-select-bg:                    $input-bg !default;
 $form-select-disabled-color:        null !default;
-$form-select-disabled-bg:           $gray-200 !default;
+$form-select-disabled-bg:           $input-disabled-bg !default;
 $form-select-disabled-border-color: $input-disabled-border-color !default;
 $form-select-bg-position:           right $form-select-padding-x center !default;
 $form-select-bg-size:               16px 12px !default; // In pixels because image dimensions
@@ -971,7 +1038,7 @@ $form-select-transition:          $input-transition !default;
 $form-range-track-width:          100% !default;
 $form-range-track-height:         .5rem !default;
 $form-range-track-cursor:         pointer !default;
-$form-range-track-bg:             $gray-300 !default;
+$form-range-track-bg:             var(--#{$prefix}tertiary-bg) !default;
 $form-range-track-border-radius:  1rem !default;
 $form-range-track-box-shadow:     $box-shadow-inset !default;
 
@@ -984,26 +1051,28 @@ $form-range-thumb-box-shadow:              0 .1rem .25rem rgba($black, .1) !defa
 $form-range-thumb-focus-box-shadow:        0 0 0 1px $body-bg, $input-focus-box-shadow !default;
 $form-range-thumb-focus-box-shadow-width:  $input-focus-width !default; // For focus box shadow issue in Edge
 $form-range-thumb-active-bg:               tint-color($component-active-bg, 70%) !default;
-$form-range-thumb-disabled-bg:             $gray-500 !default;
+$form-range-thumb-disabled-bg:             var(--#{$prefix}secondary-color) !default;
 $form-range-thumb-transition:              background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out !default;
 // scss-docs-end form-range-variables
 
 // scss-docs-start form-file-variables
 $form-file-button-color:          $input-color !default;
-$form-file-button-bg:             $input-group-addon-bg !default;
-$form-file-button-hover-bg:       shade-color($form-file-button-bg, 5%) !default;
+$form-file-button-bg:             var(--#{$prefix}tertiary-bg) !default;
+$form-file-button-hover-bg:       var(--#{$prefix}secondary-bg) !default;
 // scss-docs-end form-file-variables
 
 // scss-docs-start form-floating-variables
-$form-floating-height:            add(3.5rem, $input-height-border) !default;
-$form-floating-line-height:       1.25 !default;
-$form-floating-padding-x:         $input-padding-x !default;
-$form-floating-padding-y:         1rem !default;
-$form-floating-input-padding-t:   1.625rem !default;
-$form-floating-input-padding-b:   .625rem !default;
-$form-floating-label-opacity:     .65 !default;
-$form-floating-label-transform:   scale(.85) translateY(-.5rem) translateX(.15rem) !default;
-$form-floating-transition:        opacity .1s ease-in-out, transform .1s ease-in-out !default;
+$form-floating-height:                  add(3.5rem, $input-height-border) !default;
+$form-floating-line-height:             1.25 !default;
+$form-floating-padding-x:               $input-padding-x !default;
+$form-floating-padding-y:               1rem !default;
+$form-floating-input-padding-t:         1.625rem !default;
+$form-floating-input-padding-b:         .625rem !default;
+$form-floating-label-height:            1.5em !default;
+$form-floating-label-opacity:           .65 !default;
+$form-floating-label-transform:         scale(.85) translateY(-.5rem) translateX(.15rem) !default;
+$form-floating-label-disabled-color:    $gray-600 !default;
+$form-floating-transition:              opacity .1s ease-in-out, transform .1s ease-in-out !default;
 // scss-docs-end form-floating-variables
 
 // Form validation
@@ -1021,15 +1090,30 @@ $form-feedback-icon-invalid-color:  $form-feedback-invalid-color !default;
 $form-feedback-icon-invalid:        url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='#{$form-feedback-icon-invalid-color}'><circle cx='6' cy='6' r='4.5'/><path stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/><circle cx='6' cy='8.2' r='.6' fill='#{$form-feedback-icon-invalid-color}' stroke='none'/></svg>") !default;
 // scss-docs-end form-feedback-variables
 
+// scss-docs-start form-validation-colors
+$form-valid-color:                  $form-feedback-valid-color !default;
+$form-valid-border-color:           $form-feedback-valid-color !default;
+$form-invalid-color:                $form-feedback-invalid-color !default;
+$form-invalid-border-color:         $form-feedback-invalid-color !default;
+// scss-docs-end form-validation-colors
+
 // scss-docs-start form-validation-states
 $form-validation-states: (
   "valid": (
-    "color": $form-feedback-valid-color,
-    "icon": $form-feedback-icon-valid
+    "color": var(--#{$prefix}form-valid-color),
+    "icon": $form-feedback-icon-valid,
+    "tooltip-color": #fff,
+    "tooltip-bg-color": var(--#{$prefix}success),
+    "focus-box-shadow": 0 0 $input-btn-focus-blur $input-focus-width rgba(var(--#{$prefix}success-rgb), $input-btn-focus-color-opacity),
+    "border-color": var(--#{$prefix}form-valid-border-color),
   ),
   "invalid": (
-    "color": $form-feedback-invalid-color,
-    "icon": $form-feedback-icon-invalid
+    "color": var(--#{$prefix}form-invalid-color),
+    "icon": $form-feedback-icon-invalid,
+    "tooltip-color": #fff,
+    "tooltip-bg-color": var(--#{$prefix}danger),
+    "focus-box-shadow": 0 0 $input-btn-focus-blur $input-focus-width rgba(var(--#{$prefix}danger-rgb), $input-btn-focus-color-opacity),
+    "border-color": var(--#{$prefix}form-invalid-border-color),
   )
 ) !default;
 // scss-docs-end form-validation-states
@@ -1052,6 +1136,16 @@ $zindex-tooltip:                    1080 !default;
 $zindex-toast:                      1090 !default;
 // scss-docs-end zindex-stack
 
+// scss-docs-start zindex-levels-map
+$zindex-levels: (
+  n1: -1,
+  0: 0,
+  1: 1,
+  2: 2,
+  3: 3
+) !default;
+// scss-docs-end zindex-levels-map
+
 
 // Navs
 
@@ -1063,19 +1157,24 @@ $nav-link-font-weight:              null !default;
 $nav-link-color:                    var(--#{$prefix}link-color) !default;
 $nav-link-hover-color:              var(--#{$prefix}link-hover-color) !default;
 $nav-link-transition:               color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out !default;
-$nav-link-disabled-color:           $gray-600 !default;
-
-$nav-tabs-border-color:             $gray-300 !default;
-$nav-tabs-border-width:             $border-width !default;
-$nav-tabs-border-radius:            $border-radius !default;
-$nav-tabs-link-hover-border-color:  $gray-200 $gray-200 $nav-tabs-border-color !default;
-$nav-tabs-link-active-color:        $gray-700 !default;
-$nav-tabs-link-active-bg:           $body-bg !default;
-$nav-tabs-link-active-border-color: $gray-300 $gray-300 $nav-tabs-link-active-bg !default;
-
-$nav-pills-border-radius:           $border-radius !default;
+$nav-link-disabled-color:           var(--#{$prefix}secondary-color) !default;
+$nav-link-focus-box-shadow:         $focus-ring-box-shadow !default;
+
+$nav-tabs-border-color:             var(--#{$prefix}border-color) !default;
+$nav-tabs-border-width:             var(--#{$prefix}border-width) !default;
+$nav-tabs-border-radius:            var(--#{$prefix}border-radius) !default;
+$nav-tabs-link-hover-border-color:  var(--#{$prefix}secondary-bg) var(--#{$prefix}secondary-bg) $nav-tabs-border-color !default;
+$nav-tabs-link-active-color:        var(--#{$prefix}emphasis-color) !default;
+$nav-tabs-link-active-bg:           var(--#{$prefix}body-bg) !default;
+$nav-tabs-link-active-border-color: var(--#{$prefix}border-color) var(--#{$prefix}border-color) $nav-tabs-link-active-bg !default;
+
+$nav-pills-border-radius:           var(--#{$prefix}border-radius) !default;
 $nav-pills-link-active-color:       $component-active-color !default;
 $nav-pills-link-active-bg:          $component-active-bg !default;
+
+$nav-underline-gap:                 1rem !default;
+$nav-underline-border-width:        .125rem !default;
+$nav-underline-link-active-color:   var(--#{$prefix}emphasis-color) !default;
 // scss-docs-end nav-variables
 
 
@@ -1101,12 +1200,13 @@ $navbar-toggler-border-radius:      $btn-border-radius !default;
 $navbar-toggler-focus-width:        $btn-focus-width !default;
 $navbar-toggler-transition:         box-shadow .15s ease-in-out !default;
 
-$navbar-light-color:                rgba($black, .55) !default;
-$navbar-light-hover-color:          rgba($black, .7) !default;
-$navbar-light-active-color:         rgba($black, .9) !default;
-$navbar-light-disabled-color:       rgba($black, .3) !default;
-$navbar-light-toggler-icon-bg:      url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'><path stroke='#{$navbar-light-color}' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/></svg>") !default;
-$navbar-light-toggler-border-color: rgba($black, .1) !default;
+$navbar-light-color:                rgba(var(--#{$prefix}emphasis-color-rgb), .65) !default;
+$navbar-light-hover-color:          rgba(var(--#{$prefix}emphasis-color-rgb), .8) !default;
+$navbar-light-active-color:         rgba(var(--#{$prefix}emphasis-color-rgb), 1) !default;
+$navbar-light-disabled-color:       rgba(var(--#{$prefix}emphasis-color-rgb), .3) !default;
+$navbar-light-icon-color:           rgba($body-color, .75) !default;
+$navbar-light-toggler-icon-bg:      url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'><path stroke='#{$navbar-light-icon-color}' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/></svg>") !default;
+$navbar-light-toggler-border-color: rgba(var(--#{$prefix}emphasis-color-rgb), .15) !default;
 $navbar-light-brand-color:          $navbar-light-active-color !default;
 $navbar-light-brand-hover-color:    $navbar-light-active-color !default;
 // scss-docs-end navbar-variables
@@ -1133,24 +1233,24 @@ $dropdown-padding-x:                0 !default;
 $dropdown-padding-y:                .5rem !default;
 $dropdown-spacer:                   .125rem !default;
 $dropdown-font-size:                $font-size-base !default;
-$dropdown-color:                    $body-color !default;
-$dropdown-bg:                       $white !default;
+$dropdown-color:                    var(--#{$prefix}body-color) !default;
+$dropdown-bg:                       var(--#{$prefix}body-bg) !default;
 $dropdown-border-color:             var(--#{$prefix}border-color-translucent) !default;
-$dropdown-border-radius:            $border-radius !default;
-$dropdown-border-width:             $border-width !default;
-$dropdown-inner-border-radius:      subtract($dropdown-border-radius, $dropdown-border-width) !default;
+$dropdown-border-radius:            var(--#{$prefix}border-radius) !default;
+$dropdown-border-width:             var(--#{$prefix}border-width) !default;
+$dropdown-inner-border-radius:      calc(#{$dropdown-border-radius} - #{$dropdown-border-width}) !default; // stylelint-disable-line function-disallowed-list
 $dropdown-divider-bg:               $dropdown-border-color !default;
 $dropdown-divider-margin-y:         $spacer * .5 !default;
 $dropdown-box-shadow:               $box-shadow !default;
 
-$dropdown-link-color:               $gray-900 !default;
-$dropdown-link-hover-color:         shade-color($dropdown-link-color, 10%) !default;
-$dropdown-link-hover-bg:            $gray-200 !default;
+$dropdown-link-color:               var(--#{$prefix}body-color) !default;
+$dropdown-link-hover-color:         $dropdown-link-color !default;
+$dropdown-link-hover-bg:            var(--#{$prefix}tertiary-bg) !default;
 
 $dropdown-link-active-color:        $component-active-color !default;
 $dropdown-link-active-bg:           $component-active-bg !default;
 
-$dropdown-link-disabled-color:      $gray-500 !default;
+$dropdown-link-disabled-color:      var(--#{$prefix}tertiary-color) !default;
 
 $dropdown-item-padding-y:           $spacer * .25 !default;
 $dropdown-item-padding-x:           $spacer !default;
@@ -1192,33 +1292,33 @@ $pagination-padding-x-lg:           1.5rem !default;
 $pagination-font-size:              $font-size-base !default;
 
 $pagination-color:                  var(--#{$prefix}link-color) !default;
-$pagination-bg:                     $white !default;
-$pagination-border-radius:          $border-radius !default;
-$pagination-border-width:           $border-width !default;
-$pagination-margin-start:           ($pagination-border-width * -1) !default;
-$pagination-border-color:           $gray-300 !default;
+$pagination-bg:                     var(--#{$prefix}body-bg) !default;
+$pagination-border-radius:          var(--#{$prefix}border-radius) !default;
+$pagination-border-width:           var(--#{$prefix}border-width) !default;
+$pagination-margin-start:           calc(#{$pagination-border-width} * -1) !default; // stylelint-disable-line function-disallowed-list
+$pagination-border-color:           var(--#{$prefix}border-color) !default;
 
 $pagination-focus-color:            var(--#{$prefix}link-hover-color) !default;
-$pagination-focus-bg:               $gray-200 !default;
-$pagination-focus-box-shadow:       $input-btn-focus-box-shadow !default;
+$pagination-focus-bg:               var(--#{$prefix}secondary-bg) !default;
+$pagination-focus-box-shadow:       $focus-ring-box-shadow !default;
 $pagination-focus-outline:          0 !default;
 
 $pagination-hover-color:            var(--#{$prefix}link-hover-color) !default;
-$pagination-hover-bg:               $gray-200 !default;
-$pagination-hover-border-color:     $gray-300 !default;
+$pagination-hover-bg:               var(--#{$prefix}tertiary-bg) !default;
+$pagination-hover-border-color:     var(--#{$prefix}border-color) !default; // Todo in v6: remove this?
 
 $pagination-active-color:           $component-active-color !default;
 $pagination-active-bg:              $component-active-bg !default;
-$pagination-active-border-color:    $pagination-active-bg !default;
+$pagination-active-border-color:    $component-active-bg !default;
 
-$pagination-disabled-color:         $gray-600 !default;
-$pagination-disabled-bg:            $white !default;
-$pagination-disabled-border-color:  $gray-300 !default;
+$pagination-disabled-color:         var(--#{$prefix}secondary-color) !default;
+$pagination-disabled-bg:            var(--#{$prefix}secondary-bg) !default;
+$pagination-disabled-border-color:  var(--#{$prefix}border-color) !default;
 
 $pagination-transition:              color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out !default;
 
-$pagination-border-radius-sm:       $border-radius-sm !default;
-$pagination-border-radius-lg:       $border-radius-lg !default;
+$pagination-border-radius-sm:       var(--#{$prefix}border-radius-sm) !default;
+$pagination-border-radius-lg:       var(--#{$prefix}border-radius-lg) !default;
 // scss-docs-end pagination-variables
 
 
@@ -1235,18 +1335,20 @@ $placeholder-opacity-min:           .2 !default;
 $card-spacer-y:                     $spacer !default;
 $card-spacer-x:                     $spacer !default;
 $card-title-spacer-y:               $spacer * .5 !default;
-$card-border-width:                 $border-width !default;
+$card-title-color:                  null !default;
+$card-subtitle-color:               null !default;
+$card-border-width:                 var(--#{$prefix}border-width) !default;
 $card-border-color:                 var(--#{$prefix}border-color-translucent) !default;
-$card-border-radius:                $border-radius !default;
+$card-border-radius:                var(--#{$prefix}border-radius) !default;
 $card-box-shadow:                   null !default;
 $card-inner-border-radius:          subtract($card-border-radius, $card-border-width) !default;
 $card-cap-padding-y:                $card-spacer-y * .5 !default;
 $card-cap-padding-x:                $card-spacer-x !default;
-$card-cap-bg:                       rgba($black, .03) !default;
+$card-cap-bg:                       rgba(var(--#{$prefix}body-color-rgb), .03) !default;
 $card-cap-color:                    null !default;
 $card-height:                       null !default;
 $card-color:                        null !default;
-$card-bg:                           $white !default;
+$card-bg:                           var(--#{$prefix}body-bg) !default;
 $card-img-overlay-padding:          $spacer !default;
 $card-group-margin:                 $grid-gutter-width * .5 !default;
 // scss-docs-end card-variables
@@ -1256,11 +1358,11 @@ $card-group-margin:                 $grid-gutter-width * .5 !default;
 // scss-docs-start accordion-variables
 $accordion-padding-y:                     1rem !default;
 $accordion-padding-x:                     1.25rem !default;
-$accordion-color:                         $body-color !default; // Sass variable because of $accordion-button-icon
-$accordion-bg:                            $body-bg !default;
-$accordion-border-width:                  $border-width !default;
+$accordion-color:                         var(--#{$prefix}body-color) !default;
+$accordion-bg:                            var(--#{$prefix}body-bg) !default;
+$accordion-border-width:                  var(--#{$prefix}border-width) !default;
 $accordion-border-color:                  var(--#{$prefix}border-color) !default;
-$accordion-border-radius:                 $border-radius !default;
+$accordion-border-radius:                 var(--#{$prefix}border-radius) !default;
 $accordion-inner-border-radius:           subtract($accordion-border-radius, $accordion-border-width) !default;
 
 $accordion-body-padding-y:                $accordion-padding-y !default;
@@ -1268,18 +1370,18 @@ $accordion-body-padding-x:                $accordion-padding-x !default;
 
 $accordion-button-padding-y:              $accordion-padding-y !default;
 $accordion-button-padding-x:              $accordion-padding-x !default;
-$accordion-button-color:                  $accordion-color !default;
+$accordion-button-color:                  var(--#{$prefix}body-color) !default;
 $accordion-button-bg:                     var(--#{$prefix}accordion-bg) !default;
 $accordion-transition:                    $btn-transition, border-radius .15s ease !default;
-$accordion-button-active-bg:              tint-color($component-active-bg, 90%) !default;
-$accordion-button-active-color:           shade-color($primary, 10%) !default;
+$accordion-button-active-bg:              var(--#{$prefix}primary-bg-subtle) !default;
+$accordion-button-active-color:           var(--#{$prefix}primary-text-emphasis) !default;
 
 $accordion-button-focus-border-color:     $input-focus-border-color !default;
 $accordion-button-focus-box-shadow:       $btn-focus-box-shadow !default;
 
 $accordion-icon-width:                    1.25rem !default;
-$accordion-icon-color:                    $accordion-button-color !default;
-$accordion-icon-active-color:             $accordion-button-active-color !default;
+$accordion-icon-color:                    $body-color !default;
+$accordion-icon-active-color:             $primary-text-emphasis !default;
 $accordion-icon-transition:               transform .2s ease-in-out !default;
 $accordion-icon-transform:                rotate(-180deg) !default;
 
@@ -1292,9 +1394,9 @@ $accordion-button-active-icon:  url("data:image/svg+xml,<svg xmlns='http://www.w
 // scss-docs-start tooltip-variables
 $tooltip-font-size:                 $font-size-sm !default;
 $tooltip-max-width:                 200px !default;
-$tooltip-color:                     $white !default;
-$tooltip-bg:                        $black !default;
-$tooltip-border-radius:             $border-radius !default;
+$tooltip-color:                     var(--#{$prefix}body-bg) !default;
+$tooltip-bg:                        var(--#{$prefix}emphasis-color) !default;
+$tooltip-border-radius:             var(--#{$prefix}border-radius) !default;
 $tooltip-opacity:                   .9 !default;
 $tooltip-padding-y:                 $spacer * .25 !default;
 $tooltip-padding-x:                 $spacer * .5 !default;
@@ -1322,21 +1424,21 @@ $form-feedback-tooltip-border-radius: $tooltip-border-radius !default;
 
 // scss-docs-start popover-variables
 $popover-font-size:                 $font-size-sm !default;
-$popover-bg:                        $white !default;
+$popover-bg:                        var(--#{$prefix}body-bg) !default;
 $popover-max-width:                 276px !default;
-$popover-border-width:              $border-width !default;
+$popover-border-width:              var(--#{$prefix}border-width) !default;
 $popover-border-color:              var(--#{$prefix}border-color-translucent) !default;
-$popover-border-radius:             $border-radius-lg !default;
-$popover-inner-border-radius:       subtract($popover-border-radius, $popover-border-width) !default;
+$popover-border-radius:             var(--#{$prefix}border-radius-lg) !default;
+$popover-inner-border-radius:       calc(#{$popover-border-radius} - #{$popover-border-width}) !default; // stylelint-disable-line function-disallowed-list
 $popover-box-shadow:                $box-shadow !default;
 
 $popover-header-font-size:          $font-size-base !default;
-$popover-header-bg:                 shade-color($popover-bg, 6%) !default;
+$popover-header-bg:                 var(--#{$prefix}secondary-bg) !default;
 $popover-header-color:              $headings-color !default;
 $popover-header-padding-y:          .5rem !default;
 $popover-header-padding-x:          $spacer !default;
 
-$popover-body-color:                $body-color !default;
+$popover-body-color:                var(--#{$prefix}body-color) !default;
 $popover-body-padding-y:            $spacer !default;
 $popover-body-padding-x:            $spacer !default;
 
@@ -1359,16 +1461,16 @@ $toast-padding-x:                   .75rem !default;
 $toast-padding-y:                   .5rem !default;
 $toast-font-size:                   .875rem !default;
 $toast-color:                       null !default;
-$toast-background-color:            rgba($white, .85) !default;
-$toast-border-width:                $border-width !default;
+$toast-background-color:            rgba(var(--#{$prefix}body-bg-rgb), .85) !default;
+$toast-border-width:                var(--#{$prefix}border-width) !default;
 $toast-border-color:                var(--#{$prefix}border-color-translucent) !default;
-$toast-border-radius:               $border-radius !default;
-$toast-box-shadow:                  $box-shadow !default;
+$toast-border-radius:               var(--#{$prefix}border-radius) !default;
+$toast-box-shadow:                  var(--#{$prefix}box-shadow) !default;
 $toast-spacing:                     $container-padding-x !default;
 
-$toast-header-color:                $gray-600 !default;
-$toast-header-background-color:     rgba($white, .85) !default;
-$toast-header-border-color:         rgba($black, .05) !default;
+$toast-header-color:                var(--#{$prefix}secondary-color) !default;
+$toast-header-background-color:     rgba(var(--#{$prefix}body-bg-rgb), .85) !default;
+$toast-header-border-color:         $toast-border-color !default;
 // scss-docs-end toast-variables
 
 
@@ -1380,7 +1482,7 @@ $badge-font-weight:                 $font-weight-bold !default;
 $badge-color:                       $white !default;
 $badge-padding-y:                   .35em !default;
 $badge-padding-x:                   .65em !default;
-$badge-border-radius:               $border-radius !default;
+$badge-border-radius:               var(--#{$prefix}border-radius) !default;
 // scss-docs-end badge-variables
 
 
@@ -1397,10 +1499,10 @@ $modal-dialog-margin-y-sm-up:       1.75rem !default;
 $modal-title-line-height:           $line-height-base !default;
 
 $modal-content-color:               null !default;
-$modal-content-bg:                  $white !default;
+$modal-content-bg:                  var(--#{$prefix}body-bg) !default;
 $modal-content-border-color:        var(--#{$prefix}border-color-translucent) !default;
-$modal-content-border-width:        $border-width !default;
-$modal-content-border-radius:       $border-radius-lg !default;
+$modal-content-border-width:        var(--#{$prefix}border-width) !default;
+$modal-content-border-radius:       var(--#{$prefix}border-radius-lg) !default;
 $modal-content-inner-border-radius: subtract($modal-content-border-radius, $modal-content-border-width) !default;
 $modal-content-box-shadow-xs:       $box-shadow-sm !default;
 $modal-content-box-shadow-sm-up:    $box-shadow !default;
@@ -1438,24 +1540,29 @@ $modal-scale-transform:             scale(1.02) !default;
 $alert-padding-y:               $spacer !default;
 $alert-padding-x:               $spacer !default;
 $alert-margin-bottom:           1rem !default;
-$alert-border-radius:           $border-radius !default;
+$alert-border-radius:           var(--#{$prefix}border-radius) !default;
 $alert-link-font-weight:        $font-weight-bold !default;
-$alert-border-width:            $border-width !default;
+$alert-border-width:            var(--#{$prefix}border-width) !default;
 $alert-bg-scale:                -80% !default;
 $alert-border-scale:            -70% !default;
 $alert-color-scale:             40% !default;
 $alert-dismissible-padding-r:   $alert-padding-x * 3 !default; // 3x covers width of x plus default padding on either side
 // scss-docs-end alert-variables
 
+// fusv-disable
+$alert-bg-scale:                -80% !default; // Deprecated in v5.2.0, to be removed in v6
+$alert-border-scale:            -70% !default; // Deprecated in v5.2.0, to be removed in v6
+$alert-color-scale:             40% !default; // Deprecated in v5.2.0, to be removed in v6
+// fusv-enable
 
 // Progress bars
 
 // scss-docs-start progress-variables
 $progress-height:                   1rem !default;
 $progress-font-size:                $font-size-base * .75 !default;
-$progress-bg:                       $gray-200 !default;
-$progress-border-radius:            $border-radius !default;
-$progress-box-shadow:               $box-shadow-inset !default;
+$progress-bg:                       var(--#{$prefix}secondary-bg) !default;
+$progress-border-radius:            var(--#{$prefix}border-radius) !default;
+$progress-box-shadow:               var(--#{$prefix}box-shadow-inset) !default;
 $progress-bar-color:                $white !default;
 $progress-bar-bg:                   $primary !default;
 $progress-bar-animation-timing:     1s linear infinite !default;
@@ -1466,30 +1573,32 @@ $progress-bar-transition:           width .6s ease !default;
 // List group
 
 // scss-docs-start list-group-variables
-$list-group-color:                  $gray-900 !default;
-$list-group-bg:                     $white !default;
-$list-group-border-color:           rgba($black, .125) !default;
-$list-group-border-width:           $border-width !default;
-$list-group-border-radius:          $border-radius !default;
+$list-group-color:                  var(--#{$prefix}body-color) !default;
+$list-group-bg:                     var(--#{$prefix}body-bg) !default;
+$list-group-border-color:           var(--#{$prefix}border-color) !default;
+$list-group-border-width:           var(--#{$prefix}border-width) !default;
+$list-group-border-radius:          var(--#{$prefix}border-radius) !default;
 
 $list-group-item-padding-y:         $spacer * .5 !default;
 $list-group-item-padding-x:         $spacer !default;
-$list-group-item-bg-scale:          -80% !default;
-$list-group-item-color-scale:       40% !default;
+// fusv-disable
+$list-group-item-bg-scale:          -80% !default; // Deprecated in v5.3.0
+$list-group-item-color-scale:       40% !default; // Deprecated in v5.3.0
+// fusv-enable
 
-$list-group-hover-bg:               $gray-100 !default;
+$list-group-hover-bg:               var(--#{$prefix}tertiary-bg) !default;
 $list-group-active-color:           $component-active-color !default;
 $list-group-active-bg:              $component-active-bg !default;
 $list-group-active-border-color:    $list-group-active-bg !default;
 
-$list-group-disabled-color:         $gray-600 !default;
+$list-group-disabled-color:         var(--#{$prefix}secondary-color) !default;
 $list-group-disabled-bg:            $list-group-bg !default;
 
-$list-group-action-color:           $gray-700 !default;
-$list-group-action-hover-color:     $list-group-action-color !default;
+$list-group-action-color:           var(--#{$prefix}secondary-color) !default;
+$list-group-action-hover-color:     var(--#{$prefix}emphasis-color) !default;
 
-$list-group-action-active-color:    $body-color !default;
-$list-group-action-active-bg:       $gray-200 !default;
+$list-group-action-active-color:    var(--#{$prefix}body-color) !default;
+$list-group-action-active-bg:       var(--#{$prefix}secondary-bg) !default;
 // scss-docs-end list-group-variables
 
 
@@ -1497,11 +1606,11 @@ $list-group-action-active-bg:       $gray-200 !default;
 
 // scss-docs-start thumbnail-variables
 $thumbnail-padding:                 .25rem !default;
-$thumbnail-bg:                      $body-bg !default;
-$thumbnail-border-width:            $border-width !default;
+$thumbnail-bg:                      var(--#{$prefix}body-bg) !default;
+$thumbnail-border-width:            var(--#{$prefix}border-width) !default;
 $thumbnail-border-color:            var(--#{$prefix}border-color) !default;
-$thumbnail-border-radius:           $border-radius !default;
-$thumbnail-box-shadow:              $box-shadow-sm !default;
+$thumbnail-border-radius:           var(--#{$prefix}border-radius) !default;
+$thumbnail-box-shadow:              var(--#{$prefix}box-shadow-sm) !default;
 // scss-docs-end thumbnail-variables
 
 
@@ -1509,7 +1618,7 @@ $thumbnail-box-shadow:              $box-shadow-sm !default;
 
 // scss-docs-start figure-variables
 $figure-caption-font-size:          $small-font-size !default;
-$figure-caption-color:              $gray-600 !default;
+$figure-caption-color:              var(--#{$prefix}secondary-color) !default;
 // scss-docs-end figure-variables
 
 
@@ -1522,8 +1631,8 @@ $breadcrumb-padding-x:              0 !default;
 $breadcrumb-item-padding-x:         .5rem !default;
 $breadcrumb-margin-bottom:          1rem !default;
 $breadcrumb-bg:                     null !default;
-$breadcrumb-divider-color:          $gray-600 !default;
-$breadcrumb-active-color:           $gray-600 !default;
+$breadcrumb-divider-color:          var(--#{$prefix}secondary-color) !default;
+$breadcrumb-active-color:           var(--#{$prefix}secondary-color) !default;
 $breadcrumb-divider:                quote("/") !default;
 $breadcrumb-divider-flipped:        $breadcrumb-divider !default;
 $breadcrumb-border-radius:          null !default;
@@ -1592,7 +1701,7 @@ $btn-close-padding-x:        .25em !default;
 $btn-close-padding-y:        $btn-close-padding-x !default;
 $btn-close-color:            $black !default;
 $btn-close-bg:               url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$btn-close-color}'><path d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414z'/></svg>") !default;
-$btn-close-focus-shadow:     $input-btn-focus-box-shadow !default;
+$btn-close-focus-shadow:     $focus-ring-box-shadow !default;
 $btn-close-opacity:          .5 !default;
 $btn-close-hover-opacity:    .75 !default;
 $btn-close-focus-opacity:    1 !default;
@@ -1612,8 +1721,8 @@ $offcanvas-transition-duration:     .3s !default;
 $offcanvas-border-color:            $modal-content-border-color !default;
 $offcanvas-border-width:            $modal-content-border-width !default;
 $offcanvas-title-line-height:       $modal-title-line-height !default;
-$offcanvas-bg-color:                $modal-content-bg !default;
-$offcanvas-color:                   $modal-content-color !default;
+$offcanvas-bg-color:                var(--#{$prefix}body-bg) !default;
+$offcanvas-color:                   var(--#{$prefix}body-color) !default;
 $offcanvas-box-shadow:              $modal-content-box-shadow-xs !default;
 $offcanvas-backdrop-bg:             $modal-backdrop-bg !default;
 $offcanvas-backdrop-opacity:        $modal-backdrop-opacity !default;
diff --git a/scss/bootstrap-grid.scss b/scss/bootstrap-grid.scss
index 1c4cdd1..52bd577 100644
--- a/scss/bootstrap-grid.scss
+++ b/scss/bootstrap-grid.scss
@@ -5,9 +5,9 @@ $include-column-box-sizing: true !default;
 
 @import "functions";
 @import "variables";
+@import "variables-dark";
 @import "maps";
 
-@import "mixins/lists";
 @import "mixins/breakpoints";
 @import "mixins/container";
 @import "mixins/grid";
@@ -15,8 +15,6 @@ $include-column-box-sizing: true !default;
 
 @import "vendor/rfs";
 
-@import "root";
-
 @import "containers";
 @import "grid";
 
diff --git a/scss/bootstrap-reboot.scss b/scss/bootstrap-reboot.scss
index af52745..5b69b95 100644
--- a/scss/bootstrap-reboot.scss
+++ b/scss/bootstrap-reboot.scss
@@ -3,6 +3,7 @@
 
 @import "functions";
 @import "variables";
+@import "variables-dark";
 @import "maps";
 @import "mixins";
 @import "root";
diff --git a/scss/bootstrap-utilities.scss b/scss/bootstrap-utilities.scss
index 2b3dbc5..99c4a35 100644
--- a/scss/bootstrap-utilities.scss
+++ b/scss/bootstrap-utilities.scss
@@ -4,6 +4,7 @@
 // Configuration
 @import "functions";
 @import "variables";
+@import "variables-dark";
 @import "maps";
 @import "mixins";
 @import "utilities";
diff --git a/scss/bootstrap.scss b/scss/bootstrap.scss
index 8f8296d..449d704 100644
--- a/scss/bootstrap.scss
+++ b/scss/bootstrap.scss
@@ -6,6 +6,7 @@
 // Configuration
 @import "functions";
 @import "variables";
+@import "variables-dark";
 @import "maps";
 @import "mixins";
 @import "utilities";
diff --git a/scss/forms/_floating-labels.scss b/scss/forms/_floating-labels.scss
index 6e5c9a7..3ca4264 100644
--- a/scss/forms/_floating-labels.scss
+++ b/scss/forms/_floating-labels.scss
@@ -5,6 +5,7 @@
   > .form-control-plaintext,
   > .form-select {
     height: $form-floating-height;
+    min-height: $form-floating-height;
     line-height: $form-floating-line-height;
   }
 
@@ -12,7 +13,7 @@
     position: absolute;
     top: 0;
     left: 0;
-    width: 100%;
+    z-index: 2;
     height: 100%; // allow textareas
     padding: $form-floating-padding-y $form-floating-padding-x;
     overflow: hidden;
@@ -55,14 +56,24 @@
   > .form-control-plaintext,
   > .form-select {
     ~ label {
-      opacity: $form-floating-label-opacity;
+      color: rgba(var(--#{$prefix}body-color-rgb), #{$form-floating-label-opacity});
       transform: $form-floating-label-transform;
+
+      &::after {
+        position: absolute;
+        inset: $form-floating-padding-y ($form-floating-padding-x * .5);
+        z-index: -1;
+        height: $form-floating-label-height;
+        content: "";
+        background-color: $input-bg;
+        @include border-radius($input-border-radius);
+      }
     }
   }
   // Duplicated because `:-webkit-autofill` invalidates other selectors when grouped
   > .form-control:-webkit-autofill {
     ~ label {
-      opacity: $form-floating-label-opacity;
+      color: rgba(var(--#{$prefix}body-color-rgb), #{$form-floating-label-opacity});
       transform: $form-floating-label-transform;
     }
   }
@@ -72,4 +83,12 @@
       border-width: $input-border-width 0; // Required to properly position label text - as explained above
     }
   }
+
+  > :disabled ~ label {
+    color: $form-floating-label-disabled-color;
+
+    &::after {
+      background-color: $input-disabled-bg;
+    }
+  }
 }
diff --git a/scss/forms/_form-check.scss b/scss/forms/_form-check.scss
index 42a2a96..83aacba 100644
--- a/scss/forms/_form-check.scss
+++ b/scss/forms/_form-check.scss
@@ -27,11 +27,14 @@
 }
 
 .form-check-input {
+  --#{$prefix}form-check-bg: #{$form-check-input-bg};
+
   width: $form-check-input-width;
   height: $form-check-input-width;
   margin-top: ($line-height-base - $form-check-input-width) * .5; // line-height minus check height
   vertical-align: top;
-  background-color: $form-check-input-bg;
+  background-color: var(--#{$prefix}form-check-bg);
+  background-image: var(--#{$prefix}form-check-bg-image);
   background-repeat: no-repeat;
   background-position: center;
   background-size: contain;
@@ -65,17 +68,17 @@
 
     &[type="checkbox"] {
       @if $enable-gradients {
-        background-image: escape-svg($form-check-input-checked-bg-image), var(--#{$prefix}gradient);
+        --#{$prefix}form-check-bg-image: #{escape-svg($form-check-input-checked-bg-image)}, var(--#{$prefix}gradient);
       } @else {
-        background-image: escape-svg($form-check-input-checked-bg-image);
+        --#{$prefix}form-check-bg-image: #{escape-svg($form-check-input-checked-bg-image)};
       }
     }
 
     &[type="radio"] {
       @if $enable-gradients {
-        background-image: escape-svg($form-check-radio-checked-bg-image), var(--#{$prefix}gradient);
+        --#{$prefix}form-check-bg-image: #{escape-svg($form-check-radio-checked-bg-image)}, var(--#{$prefix}gradient);
       } @else {
-        background-image: escape-svg($form-check-radio-checked-bg-image);
+        --#{$prefix}form-check-bg-image: #{escape-svg($form-check-radio-checked-bg-image)};
       }
     }
   }
@@ -85,9 +88,9 @@
     border-color: $form-check-input-indeterminate-border-color;
 
     @if $enable-gradients {
-      background-image: escape-svg($form-check-input-indeterminate-bg-image), var(--#{$prefix}gradient);
+      --#{$prefix}form-check-bg-image: #{escape-svg($form-check-input-indeterminate-bg-image)}, var(--#{$prefix}gradient);
     } @else {
-      background-image: escape-svg($form-check-input-indeterminate-bg-image);
+      --#{$prefix}form-check-bg-image: #{escape-svg($form-check-input-indeterminate-bg-image)};
     }
   }
 
@@ -121,24 +124,26 @@
   padding-left: $form-switch-padding-start;
 
   .form-check-input {
+    --#{$prefix}form-switch-bg: #{escape-svg($form-switch-bg-image)};
+
     width: $form-switch-width;
     margin-left: $form-switch-padding-start * -1;
-    background-image: escape-svg($form-switch-bg-image);
+    background-image: var(--#{$prefix}form-switch-bg);
     background-position: left center;
     @include border-radius($form-switch-border-radius);
     @include transition($form-switch-transition);
 
     &:focus {
-      background-image: escape-svg($form-switch-focus-bg-image);
+      --#{$prefix}form-switch-bg: #{escape-svg($form-switch-focus-bg-image)};
     }
 
     &:checked {
       background-position: $form-switch-checked-bg-position;
 
       @if $enable-gradients {
-        background-image: escape-svg($form-switch-checked-bg-image), var(--#{$prefix}gradient);
+        --#{$prefix}form-switch-bg: #{escape-svg($form-switch-checked-bg-image)}, var(--#{$prefix}gradient);
       } @else {
-        background-image: escape-svg($form-switch-checked-bg-image);
+        --#{$prefix}form-switch-bg: #{escape-svg($form-switch-checked-bg-image)};
       }
     }
   }
@@ -173,3 +178,11 @@
     }
   }
 }
+
+@if $enable-dark-mode {
+  @include color-mode(dark) {
+    .form-switch .form-check-input:not(:checked):not(:focus) {
+      --#{$prefix}form-switch-bg: #{escape-svg($form-switch-bg-image-dark)};
+    }
+  }
+}
diff --git a/scss/forms/_form-control.scss b/scss/forms/_form-control.scss
index e707c57..ca2a7df 100644
--- a/scss/forms/_form-control.scss
+++ b/scss/forms/_form-control.scss
@@ -44,12 +44,31 @@
     }
   }
 
-  // Add some height to date inputs on iOS
-  // https://github.com/twbs/bootstrap/issues/23307
-  // TODO: we can remove this workaround once https://bugs.webkit.org/show_bug.cgi?id=198959 is resolved
   &::-webkit-date-and-time-value {
+    // On Android Chrome, form-control's "width: 100%" makes the input width too small
+    // Tested under Android 11 / Chrome 89, Android 12 / Chrome 100, Android 13 / Chrome 109
+    //
+    // On iOS Safari, form-control's "appearance: none" + "width: 100%" makes the input width too small
+    // Tested under iOS 16.2 / Safari 16.2
+    min-width: 85px; // Seems to be a good minimum safe width
+
+    // Add some height to date inputs on iOS
+    // https://github.com/twbs/bootstrap/issues/23307
+    // TODO: we can remove this workaround once https://bugs.webkit.org/show_bug.cgi?id=198959 is resolved
     // Multiply line-height by 1em if it has no unit
     height: if(unit($input-line-height) == "", $input-line-height * 1em, $input-line-height);
+
+    // Android Chrome type="date" is taller than the other inputs
+    // because of "margin: 1px 24px 1px 4px" inside the shadow DOM
+    // Tested under Android 11 / Chrome 89, Android 12 / Chrome 100, Android 13 / Chrome 109
+    margin: 0;
+  }
+
+  // Prevent excessive date input height in Webkit
+  // https://github.com/twbs/bootstrap/issues/34433
+  &::-webkit-datetime-edit {
+    display: block;
+    padding: 0;
   }
 
   // Placeholder
@@ -186,6 +205,7 @@ textarea {
   }
 
   &::-webkit-color-swatch {
+    border: 0 !important; // stylelint-disable-line declaration-no-important
     @include border-radius($input-border-radius);
   }
 
diff --git a/scss/forms/_form-select.scss b/scss/forms/_form-select.scss
index 78c34b8..0b26323 100644
--- a/scss/forms/_form-select.scss
+++ b/scss/forms/_form-select.scss
@@ -4,17 +4,18 @@
 // https://primer.github.io/.
 
 .form-select {
+  --#{$prefix}form-select-bg-img: #{escape-svg($form-select-indicator)};
+
   display: block;
   width: 100%;
   padding: $form-select-padding-y $form-select-indicator-padding $form-select-padding-y $form-select-padding-x;
-  -moz-padding-start: subtract($form-select-padding-x, 3px); // See https://github.com/twbs/bootstrap/issues/32636
   font-family: $form-select-font-family;
   @include font-size($form-select-font-size);
   font-weight: $form-select-font-weight;
   line-height: $form-select-line-height;
   color: $form-select-color;
   background-color: $form-select-bg;
-  background-image: escape-svg($form-select-indicator);
+  background-image: var(--#{$prefix}form-select-bg-img), var(--#{$prefix}form-select-bg-icon, none);
   background-repeat: no-repeat;
   background-position: $form-select-bg-position;
   background-size: $form-select-bg-size;
@@ -69,3 +70,11 @@
   @include font-size($form-select-font-size-lg);
   @include border-radius($form-select-border-radius-lg);
 }
+
+@if $enable-dark-mode {
+  @include color-mode(dark) {
+    .form-select {
+      --#{$prefix}form-select-bg-img: #{escape-svg($form-select-indicator-dark)};
+    }
+  }
+}
diff --git a/scss/forms/_input-group.scss b/scss/forms/_input-group.scss
index 247f74a..58e4d40 100644
--- a/scss/forms/_input-group.scss
+++ b/scss/forms/_input-group.scss
@@ -121,7 +121,7 @@
   }
 
   > :not(:first-child):not(.dropdown-menu)#{$validation-messages} {
-    margin-left: -$input-border-width;
+    margin-left: calc(#{$input-border-width} * -1); // stylelint-disable-line function-disallowed-list
     @include border-start-radius(0);
   }
 
diff --git a/scss/helpers/_color-bg.scss b/scss/helpers/_color-bg.scss
index b5ce770..c00acde 100644
--- a/scss/helpers/_color-bg.scss
+++ b/scss/helpers/_color-bg.scss
@@ -1,5 +1,3 @@
-// stylelint-disable function-name-case
-
 // All-caps `RGBA()` function used because of this Sass bug: https://github.com/sass/node-sass/issues/2251
 @each $color, $value in $theme-colors {
   $color-rgb: to-rgb($value);
diff --git a/scss/helpers/_colored-links.scss b/scss/helpers/_colored-links.scss
index 1cb4182..5f86857 100644
--- a/scss/helpers/_colored-links.scss
+++ b/scss/helpers/_colored-links.scss
@@ -1,12 +1,30 @@
+// All-caps `RGBA()` function used because of this Sass bug: https://github.com/sass/node-sass/issues/2251
 @each $color, $value in $theme-colors {
   .link-#{$color} {
-    color: $value !important; // stylelint-disable-line declaration-no-important
+    color: RGBA(var(--#{$prefix}#{$color}-rgb), var(--#{$prefix}link-opacity, 1)) if($enable-important-utilities, !important, null);
+    text-decoration-color: RGBA(var(--#{$prefix}#{$color}-rgb), var(--#{$prefix}link-underline-opacity, 1)) if($enable-important-utilities, !important, null);
 
     @if $link-shade-percentage != 0 {
       &:hover,
       &:focus {
-        color: if(color-contrast($value) == $color-contrast-light, shade-color($value, $link-shade-percentage), tint-color($value, $link-shade-percentage)) !important; // stylelint-disable-line declaration-no-important
+        $hover-color: if(color-contrast($value) == $color-contrast-light, shade-color($value, $link-shade-percentage), tint-color($value, $link-shade-percentage));
+        color: RGBA(#{to-rgb($hover-color)}, var(--#{$prefix}link-opacity, 1)) if($enable-important-utilities, !important, null);
+        text-decoration-color: RGBA(to-rgb($hover-color), var(--#{$prefix}link-underline-opacity, 1)) if($enable-important-utilities, !important, null);
       }
     }
   }
 }
+
+// One-off special link helper as a bridge until v6
+.link-body-emphasis {
+  color: RGBA(var(--#{$prefix}emphasis-color-rgb), var(--#{$prefix}link-opacity, 1)) if($enable-important-utilities, !important, null);
+  text-decoration-color: RGBA(var(--#{$prefix}emphasis-color-rgb), var(--#{$prefix}link-underline-opacity, 1)) if($enable-important-utilities, !important, null);
+
+  @if $link-shade-percentage != 0 {
+    &:hover,
+    &:focus {
+      color: RGBA(var(--#{$prefix}emphasis-color-rgb), var(--#{$prefix}link-opacity, .75)) if($enable-important-utilities, !important, null);
+      text-decoration-color: RGBA(var(--#{$prefix}emphasis-color-rgb), var(--#{$prefix}link-underline-opacity, .75)) if($enable-important-utilities, !important, null);
+    }
+  }
+}
diff --git a/scss/helpers/_focus-ring.scss b/scss/helpers/_focus-ring.scss
new file mode 100644
index 0000000..26508a8
--- /dev/null
+++ b/scss/helpers/_focus-ring.scss
@@ -0,0 +1,5 @@
+.focus-ring:focus {
+  outline: 0;
+  // By default, there is no `--bs-focus-ring-x`, `--bs-focus-ring-y`, or `--bs-focus-ring-blur`, but we provide CSS variables with fallbacks to initial `0` values
+  box-shadow: var(--#{$prefix}focus-ring-x, 0) var(--#{$prefix}focus-ring-y, 0) var(--#{$prefix}focus-ring-blur, 0) var(--#{$prefix}focus-ring-width) var(--#{$prefix}focus-ring-color);
+}
diff --git a/scss/helpers/_icon-link.scss b/scss/helpers/_icon-link.scss
new file mode 100644
index 0000000..3f8bcb3
--- /dev/null
+++ b/scss/helpers/_icon-link.scss
@@ -0,0 +1,25 @@
+.icon-link {
+  display: inline-flex;
+  gap: $icon-link-gap;
+  align-items: center;
+  text-decoration-color: rgba(var(--#{$prefix}link-color-rgb), var(--#{$prefix}link-opacity, .5));
+  text-underline-offset: $icon-link-underline-offset;
+  backface-visibility: hidden;
+
+  > .bi {
+    flex-shrink: 0;
+    width: $icon-link-icon-size;
+    height: $icon-link-icon-size;
+    fill: currentcolor;
+    @include transition($icon-link-icon-transition);
+  }
+}
+
+.icon-link-hover {
+  &:hover,
+  &:focus-visible {
+    > .bi {
+      transform: var(--#{$prefix}icon-link-transform, $icon-link-icon-transform);
+    }
+  }
+}
diff --git a/scss/mixins/_alert.scss b/scss/mixins/_alert.scss
index 231f068..fb524af 100644
--- a/scss/mixins/_alert.scss
+++ b/scss/mixins/_alert.scss
@@ -1,15 +1,18 @@
+@include deprecate("`alert-variant()`", "v5.3.0", "v6.0.0");
+
 // scss-docs-start alert-variant-mixin
 @mixin alert-variant($background, $border, $color) {
   --#{$prefix}alert-color: #{$color};
   --#{$prefix}alert-bg: #{$background};
   --#{$prefix}alert-border-color: #{$border};
+  --#{$prefix}alert-link-color: #{shade-color($color, 20%)};
 
   @if $enable-gradients {
     background-image: var(--#{$prefix}gradient);
   }
 
   .alert-link {
-    color: shade-color($color, 20%);
+    color: var(--#{$prefix}alert-link-color);
   }
 }
 // scss-docs-end alert-variant-mixin
diff --git a/scss/mixins/_banner.scss b/scss/mixins/_banner.scss
index 97ec9d1..4323989 100644
--- a/scss/mixins/_banner.scss
+++ b/scss/mixins/_banner.scss
@@ -1,9 +1,7 @@
 @mixin bsBanner($file) {
   /*!
-   * Bootstrap #{$file} v5.2.3 (https://getbootstrap.com/)
-   * Copyright 2011-2022 The Bootstrap Authors
-   * Copyright 2011-2022 Twitter, Inc.
+   * Bootstrap #{$file} v5.3.0 (https://getbootstrap.com/)
+   * Copyright 2011-2023 The Bootstrap Authors
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
    */
 }
-
diff --git a/scss/mixins/_caret.scss b/scss/mixins/_caret.scss
index 4b0f036..be73116 100644
--- a/scss/mixins/_caret.scss
+++ b/scss/mixins/_caret.scss
@@ -1,44 +1,49 @@
 // scss-docs-start caret-mixins
-@mixin caret-down {
-  border-top: $caret-width solid;
-  border-right: $caret-width solid transparent;
+@mixin caret-down($width: $caret-width) {
+  border-top: $width solid;
+  border-right: $width solid transparent;
   border-bottom: 0;
-  border-left: $caret-width solid transparent;
+  border-left: $width solid transparent;
 }
 
-@mixin caret-up {
+@mixin caret-up($width: $caret-width) {
   border-top: 0;
-  border-right: $caret-width solid transparent;
-  border-bottom: $caret-width solid;
-  border-left: $caret-width solid transparent;
+  border-right: $width solid transparent;
+  border-bottom: $width solid;
+  border-left: $width solid transparent;
 }
 
-@mixin caret-end {
-  border-top: $caret-width solid transparent;
+@mixin caret-end($width: $caret-width) {
+  border-top: $width solid transparent;
   border-right: 0;
-  border-bottom: $caret-width solid transparent;
-  border-left: $caret-width solid;
+  border-bottom: $width solid transparent;
+  border-left: $width solid;
 }
 
-@mixin caret-start {
-  border-top: $caret-width solid transparent;
-  border-right: $caret-width solid;
-  border-bottom: $caret-width solid transparent;
+@mixin caret-start($width: $caret-width) {
+  border-top: $width solid transparent;
+  border-right: $width solid;
+  border-bottom: $width solid transparent;
 }
 
-@mixin caret($direction: down) {
+@mixin caret(
+  $direction: down,
+  $width: $caret-width,
+  $spacing: $caret-spacing,
+  $vertical-align: $caret-vertical-align
+) {
   @if $enable-caret {
     &::after {
       display: inline-block;
-      margin-left: $caret-spacing;
-      vertical-align: $caret-vertical-align;
+      margin-left: $spacing;
+      vertical-align: $vertical-align;
       content: "";
       @if $direction == down {
-        @include caret-down();
+        @include caret-down($width);
       } @else if $direction == up {
-        @include caret-up();
+        @include caret-up($width);
       } @else if $direction == end {
-        @include caret-end();
+        @include caret-end($width);
       }
     }
 
@@ -49,10 +54,10 @@
 
       &::before {
         display: inline-block;
-        margin-right: $caret-spacing;
-        vertical-align: $caret-vertical-align;
+        margin-right: $spacing;
+        vertical-align: $vertical-align;
         content: "";
-        @include caret-start();
+        @include caret-start($width);
       }
     }
 
diff --git a/scss/mixins/_color-mode.scss b/scss/mixins/_color-mode.scss
new file mode 100644
index 0000000..03338b0
--- /dev/null
+++ b/scss/mixins/_color-mode.scss
@@ -0,0 +1,21 @@
+// scss-docs-start color-mode-mixin
+@mixin color-mode($mode: light, $root: false) {
+  @if $color-mode-type == "media-query" {
+    @if $root == true {
+      @media (prefers-color-scheme: $mode) {
+        :root {
+          @content;
+        }
+      }
+    } @else {
+      @media (prefers-color-scheme: $mode) {
+        @content;
+      }
+    }
+  } @else {
+    [data-bs-theme="#{$mode}"] {
+      @content;
+    }
+  }
+}
+// scss-docs-end color-mode-mixin
diff --git a/scss/mixins/_forms.scss b/scss/mixins/_forms.scss
index 2a853a7..d47b1e4 100644
--- a/scss/mixins/_forms.scss
+++ b/scss/mixins/_forms.scss
@@ -21,7 +21,8 @@
   $icon,
   $tooltip-color: color-contrast($color),
   $tooltip-bg-color: rgba($color, $form-feedback-tooltip-opacity),
-  $focus-box-shadow: 0 0 $input-btn-focus-blur $input-focus-width rgba($color, $input-btn-focus-color-opacity)
+  $focus-box-shadow: 0 0 $input-btn-focus-blur $input-focus-width rgba($color, $input-btn-focus-color-opacity),
+  $border-color: $color
 ) {
   .#{$state}-feedback {
     display: none;
@@ -56,7 +57,7 @@
 
   .form-control {
     @include form-validation-state-selector($state) {
-      border-color: $color;
+      border-color: $border-color;
 
       @if $enable-validation-icons {
         padding-right: $input-height-inner;
@@ -67,7 +68,7 @@
       }
 
       &:focus {
-        border-color: $color;
+        border-color: $border-color;
         box-shadow: $focus-box-shadow;
       }
     }
@@ -85,20 +86,20 @@
 
   .form-select {
     @include form-validation-state-selector($state) {
-      border-color: $color;
+      border-color: $border-color;
 
       @if $enable-validation-icons {
         &:not([multiple]):not([size]),
         &:not([multiple])[size="1"] {
+          --#{$prefix}form-select-bg-icon: #{escape-svg($icon)};
           padding-right: $form-select-feedback-icon-padding-end;
-          background-image: escape-svg($form-select-indicator), escape-svg($icon);
           background-position: $form-select-bg-position, $form-select-feedback-icon-position;
           background-size: $form-select-bg-size, $form-select-feedback-icon-size;
         }
       }
 
       &:focus {
-        border-color: $color;
+        border-color: $border-color;
         box-shadow: $focus-box-shadow;
       }
     }
@@ -114,7 +115,7 @@
 
   .form-check-input {
     @include form-validation-state-selector($state) {
-      border-color: $color;
+      border-color: $border-color;
 
       &:checked {
         background-color: $color;
diff --git a/scss/mixins/_list-group.scss b/scss/mixins/_list-group.scss
index e55415f..6274f34 100644
--- a/scss/mixins/_list-group.scss
+++ b/scss/mixins/_list-group.scss
@@ -1,3 +1,5 @@
+@include deprecate("`list-group-item-variant()`", "v5.3.0", "v6.0.0");
+
 // List Groups
 
 // scss-docs-start list-group-mixin
diff --git a/scss/mixins/_utilities.scss b/scss/mixins/_utilities.scss
index 59a2374..4795e89 100644
--- a/scss/mixins/_utilities.scss
+++ b/scss/mixins/_utilities.scss
@@ -1,6 +1,6 @@
 // Utility generator
 // Used to generate utilities & print utilities
-@mixin generate-utility($utility, $infix, $is-rfs-media-query: false) {
+@mixin generate-utility($utility, $infix: "", $is-rfs-media-query: false) {
   $values: map-get($utility, values);
 
   // If the values are a list or string, convert it into a map
diff --git a/scss/mixins/_visually-hidden.scss b/scss/mixins/_visually-hidden.scss
index 4fc7f49..082aeec 100644
--- a/scss/mixins/_visually-hidden.scss
+++ b/scss/mixins/_visually-hidden.scss
@@ -6,7 +6,6 @@
 // See: https://kittygiraudel.com/2016/10/13/css-hide-and-seek/
 
 @mixin visually-hidden() {
-  position: absolute !important;
   width: 1px !important;
   height: 1px !important;
   padding: 0 !important;
@@ -15,6 +14,11 @@
   clip: rect(0, 0, 0, 0) !important;
   white-space: nowrap !important;
   border: 0 !important;
+
+  // Fix for positioned table caption that could become anonymous cells
+  &:not(caption) {
+    position: absolute !important;
+  }
 }
 
 // Use to only display content when it's focused, or one of its child elements is focused
diff --git a/scss/tests/jasmine.js b/scss/tests/jasmine.js
new file mode 100644
index 0000000..25d838c
--- /dev/null
+++ b/scss/tests/jasmine.js
@@ -0,0 +1,16 @@
+/* eslint-disable camelcase */
+
+'use strict'
+
+const path = require('node:path')
+
+module.exports = {
+  spec_dir: 'scss',
+  // Make Jasmine look for `.test.scss` files
+  spec_files: ['**/*.{test,spec}.scss'],
+  // Compile them into JS scripts running `sass-true`
+  requires: [path.join(__dirname, 'sass-true/register')],
+  // Ensure we use `require` so that the require.extensions works
+  // as `import` completely bypasses it
+  jsLoader: 'require'
+}
diff --git a/scss/tests/mixins/_color-modes.test.scss b/scss/tests/mixins/_color-modes.test.scss
new file mode 100644
index 0000000..9ecc628
--- /dev/null
+++ b/scss/tests/mixins/_color-modes.test.scss
@@ -0,0 +1,69 @@
+// stylelint-disable selector-attribute-quotes
+
+@import "../../functions";
+@import "../../variables";
+@import "../../variables-dark";
+@import "../../maps";
+@import "../../mixins";
+
+@include describe("global $color-mode-type: data") {
+  @include it("generates data attribute selectors for dark mode") {
+    @include assert() {
+      @include output() {
+        @include color-mode(dark) {
+          .element {
+            color: var(--bs-primary-text-emphasis);
+            background-color: var(--bs-primary-bg-subtle);
+          }
+        }
+        @include color-mode(dark, true) {
+          --custom-color: #{mix($indigo, $blue, 50%)};
+        }
+      }
+      @include expect() {
+        [data-bs-theme=dark] .element {
+          color: var(--bs-primary-text-emphasis);
+          background-color: var(--bs-primary-bg-subtle);
+        }
+        [data-bs-theme=dark] {
+          --custom-color: #3a3ff8;
+        }
+      }
+    }
+  }
+}
+
+@include describe("global $color-mode-type: media-query") {
+  @include it("generates media queries for dark mode") {
+    $color-mode-type: media-query !global;
+
+    @include assert() {
+      @include output() {
+        @include color-mode(dark) {
+          .element {
+            color: var(--bs-primary-text-emphasis);
+            background-color: var(--bs-primary-bg-subtle);
+          }
+        }
+        @include color-mode(dark, true) {
+          --custom-color: #{mix($indigo, $blue, 50%)};
+        }
+      }
+      @include expect() {
+        @media (prefers-color-scheme: dark) {
+          .element {
+            color: var(--bs-primary-text-emphasis);
+            background-color: var(--bs-primary-bg-subtle);
+          }
+        }
+        @media (prefers-color-scheme: dark) {
+          :root {
+            --custom-color: #3a3ff8;
+          }
+        }
+      }
+    }
+
+    $color-mode-type: data !global;
+  }
+}
diff --git a/scss/tests/mixins/_media-query-color-mode-full.test.scss b/scss/tests/mixins/_media-query-color-mode-full.test.scss
new file mode 100644
index 0000000..00ed82d
--- /dev/null
+++ b/scss/tests/mixins/_media-query-color-mode-full.test.scss
@@ -0,0 +1,8 @@
+$color-mode-type: media-query;
+
+@import "../../bootstrap";
+
+@include describe("global $color-mode-type: media-query") {
+  @include it("compiles entirely Bootstrap CSS with media-query color mode") { // stylelint-disable-line block-no-empty
+  }
+}
diff --git a/scss/tests/mixins/_utilities.test.scss b/scss/tests/mixins/_utilities.test.scss
new file mode 100644
index 0000000..63fcae3
--- /dev/null
+++ b/scss/tests/mixins/_utilities.test.scss
@@ -0,0 +1,393 @@
+$prefix: bs-;
+$enable-important-utilities: false;
+
+// Important: Do not import rfs to check that the mixin just calls the appropriate functions from it
+@import "../../mixins/utilities";
+
+@mixin test-generate-utility($params...) {
+  @include assert() {
+    @include output() {
+      @include generate-utility($params...);
+    }
+
+    @include expect() {
+      @content;
+    }
+  }
+}
+
+@include describe(generate-utility) {
+  @include it("generates a utility class for each value") {
+    @include test-generate-utility(
+      (
+        property: "padding",
+        values: (small: .5rem, large: 2rem)
+      )
+    ) {
+      .padding-small {
+        padding: .5rem;
+      }
+
+      .padding-large {
+        padding: 2rem;
+      }
+    }
+  }
+
+  @include describe("global $enable-important-utilities: true") {
+    @include it("sets !important") {
+      $enable-important-utilities: true !global;
+
+      @include test-generate-utility(
+        (
+          property: "padding",
+          values: (small: .5rem, large: 2rem)
+        )
+      ) {
+        .padding-small {
+          padding: .5rem !important;
+        }
+
+        .padding-large {
+          padding: 2rem !important;
+        }
+      }
+
+      $enable-important-utilities: false !global;
+    }
+  }
+
+  @include describe("$utility") {
+    @include describe("values") {
+      @include it("supports null keys") {
+        @include test-generate-utility(
+          (
+            property: "padding",
+            values: (null: 1rem, small: .5rem, large: 2rem)
+          ),
+        ) {
+          .padding {
+            padding: 1rem;
+          }
+
+          .padding-small {
+            padding: .5rem;
+          }
+
+          .padding-large {
+            padding: 2rem;
+          }
+        }
+      }
+
+      @include it("ignores null values") {
+        @include test-generate-utility(
+          (
+            property: "padding",
+            values: (small: null, large: 2rem)
+          )
+        ) {
+          .padding-large {
+            padding: 2rem;
+          }
+        }
+      }
+
+      @include it("supports lists") {
+        @include test-generate-utility(
+          (
+            property: "padding",
+            values: 1rem 2rem
+          )
+        ) {
+          .padding-1rem {
+            padding: 1rem;
+          }
+
+          .padding-2rem {
+            padding: 2rem;
+          }
+        }
+      }
+
+      @include it("supports single values") {
+        @include test-generate-utility(
+          (
+            property: padding,
+            values: 1rem
+          )
+        ) {
+          .padding-1rem {
+            padding: 1rem;
+          }
+        }
+      }
+    }
+
+    @include describe("class & property") {
+      @include it("adds each property to the declaration") {
+        @include test-generate-utility(
+          (
+            class: padding-x,
+            property: padding-inline-start padding-inline-end,
+            values: 1rem
+          )
+        ) {
+          .padding-x-1rem {
+            padding-inline-start: 1rem;
+            padding-inline-end: 1rem;
+          }
+        }
+      }
+
+      @include it("uses the first property as class name") {
+        @include test-generate-utility(
+          (
+            property: padding-inline-start padding-inline-end,
+            values: 1rem
+          )
+        ) {
+          .padding-inline-start-1rem {
+            padding-inline-start: 1rem;
+            padding-inline-end: 1rem;
+          }
+        }
+      }
+
+      @include it("supports a null class to create classes straight from the values") {
+        @include test-generate-utility(
+          (
+            property: visibility,
+            class: null,
+            values: (
+              visible: visible,
+              invisible: hidden,
+            )
+          )
+        ) {
+          .visible {
+            visibility: visible;
+          }
+
+          .invisible {
+            visibility: hidden;
+          }
+        }
+      }
+    }
+
+    @include describe("state") {
+      @include it("Generates selectors for each states") {
+        @include test-generate-utility(
+          (
+            property: padding,
+            values: 1rem,
+            state: hover focus,
+          )
+        ) {
+          .padding-1rem {
+            padding: 1rem;
+          }
+
+          .padding-1rem-hover:hover {
+            padding: 1rem;
+          }
+
+          .padding-1rem-focus:focus {
+            padding: 1rem;
+          }
+        }
+      }
+    }
+
+    @include describe("css-var"){
+      @include it("sets a CSS variable instead of the property") {
+        @include test-generate-utility(
+          (
+            property: padding,
+            css-variable-name: padding,
+            css-var: true,
+            values: 1rem 2rem
+          )
+        ) {
+          .padding-1rem {
+            --bs-padding: 1rem;
+          }
+
+          .padding-2rem {
+            --bs-padding: 2rem;
+          }
+        }
+      }
+
+      @include it("defaults to class") {
+        @include test-generate-utility(
+          (
+            property: padding,
+            class: padding,
+            css-var: true,
+            values: 1rem 2rem
+          )
+        ) {
+          .padding-1rem {
+            --bs-padding: 1rem;
+          }
+
+          .padding-2rem {
+            --bs-padding: 2rem;
+          }
+        }
+      }
+    }
+
+    @include describe("local-vars") {
+      @include it("generates the listed variables") {
+        @include test-generate-utility(
+          (
+            property: color,
+            class: desaturated-color,
+            local-vars: (
+              color-opacity: 1,
+              color-saturation: .25
+            ),
+            values: (
+              blue: hsla(192deg, var(--bs-color-saturation), 0, var(--bs-color-opacity))
+            )
+          )
+        ) {
+          .desaturated-color-blue {
+            --bs-color-opacity: 1;
+            // Sass compilation will put a leading zero so we want to keep that one
+            // stylelint-disable-next-line stylistic/number-leading-zero
+            --bs-color-saturation: 0.25;
+            color: hsla(192deg, var(--bs-color-saturation), 0, var(--bs-color-opacity));
+          }
+        }
+      }
+    }
+
+    @include describe("css-var & state") {
+      @include it("Generates a rule with for each state with a CSS variable") {
+        @include test-generate-utility(
+          (
+            property: padding,
+            css-var: true,
+            css-variable-name: padding,
+            values: 1rem,
+            state: hover focus,
+          )
+        ) {
+          .padding-1rem {
+            --bs-padding: 1rem;
+          }
+
+          .padding-1rem-hover:hover {
+            --bs-padding: 1rem;
+          }
+
+          .padding-1rem-focus:focus {
+            --bs-padding: 1rem;
+          }
+        }
+      }
+    }
+
+    @include describe("rtl") {
+      @include it("sets up RTLCSS for removal when false") {
+        @include test-generate-utility(
+          (
+            property: padding,
+            values: 1rem,
+            rtl: false
+          )
+        ) {
+          /* rtl:begin:remove */
+
+          .padding-1rem {
+            padding: 1rem;
+          }
+
+          /* rtl:end:remove */
+
+        }
+      }
+    }
+
+    @include describe("rfs") {
+      @include it("sets the fluid value when not inside media query") {
+        @include test-generate-utility(
+          (
+            property: padding,
+            values: 1rem,
+            rfs: true
+          )
+        ) {
+          .padding-1rem {
+            padding: rfs-fluid-value(1rem);
+          }
+        }
+      }
+
+      @include it("sets the value when inside the media query") {
+        @include test-generate-utility(
+          (
+            property: padding,
+            values: 1rem,
+            rfs: true
+          ),
+          $is-rfs-media-query: true
+        ) {
+          .padding-1rem {
+            padding: rfs-value(1rem);
+          }
+        }
+      }
+    }
+  }
+
+  @include describe("$infix") {
+    @include it("inserts the given infix") {
+      @include test-generate-utility(
+        (
+          property: "padding",
+          values: (null: 1rem, small: .5rem, large: 2rem)
+        ),
+        $infix: -sm
+      ) {
+        .padding-sm {
+          padding: 1rem;
+        }
+
+        .padding-sm-small {
+          padding: .5rem;
+        }
+
+        .padding-sm-large {
+          padding: 2rem;
+        }
+      }
+    }
+
+    @include it("strips leading - if class is null") {
+      @include test-generate-utility(
+        (
+          property: visibility,
+          class: null,
+          values: (
+            visible: visible,
+            invisible: hidden,
+          )
+        ),
+        -sm
+      ) {
+        .sm-visible {
+          visibility: visible;
+        }
+
+        .sm-invisible {
+          visibility: hidden;
+        }
+      }
+    }
+  }
+}
diff --git a/scss/tests/sass-true/register.js b/scss/tests/sass-true/register.js
new file mode 100644
index 0000000..d93e414
--- /dev/null
+++ b/scss/tests/sass-true/register.js
@@ -0,0 +1,14 @@
+'use strict'
+
+const path = require('node:path')
+
+const runnerPath = path.join(__dirname, 'runner').replace(/\\/g, '/')
+
+require.extensions['.scss'] = (module, filename) => {
+  const normalizedFilename = filename.replace(/\\/g, '/')
+
+  return module._compile(`
+    const runner = require('${runnerPath}')
+    runner('${normalizedFilename}', { describe, it })
+    `, filename)
+}
diff --git a/scss/tests/sass-true/runner.js b/scss/tests/sass-true/runner.js
new file mode 100644
index 0000000..bef870a
--- /dev/null
+++ b/scss/tests/sass-true/runner.js
@@ -0,0 +1,17 @@
+'use strict'
+
+const fs = require('node:fs')
+const path = require('node:path')
+const { runSass } = require('sass-true')
+
+module.exports = (filename, { describe, it }) => {
+  const data = fs.readFileSync(filename, 'utf8')
+  const TRUE_SETUP = '$true-terminal-output: false; @import "true";'
+  const sassString = TRUE_SETUP + data
+
+  runSass(
+    { describe, it, sourceType: 'string' },
+    sassString,
+    { loadPaths: [path.dirname(filename)] }
+  )
+}
diff --git a/scss/tests/utilities/_api.test.scss b/scss/tests/utilities/_api.test.scss
new file mode 100644
index 0000000..304d8d1
--- /dev/null
+++ b/scss/tests/utilities/_api.test.scss
@@ -0,0 +1,75 @@
+@import "../../functions";
+@import "../../variables";
+@import "../../variables-dark";
+@import "../../maps";
+@import "../../mixins";
+
+$utilities: ();
+
+@include describe("utilities/api") {
+  @include it("generates utilities for each breakpoints") {
+    $utilities: (
+      margin: (
+        property: margin,
+        values: auto
+      ),
+      padding: (
+        property: padding,
+        responsive: true,
+        values: 1rem
+      ),
+      font-size: (
+        property: font-size,
+        values: (large: 1.25rem),
+        print: true
+      )
+    ) !global;
+
+    $grid-breakpoints: (
+      xs: 0,
+      sm: 333px,
+      md: 666px
+    ) !global;
+
+    @include assert() {
+      @include output() {
+        @import "../../utilities/api";
+      }
+
+      @include expect() {
+        // margin is not set to responsive
+        .margin-auto {
+          margin: auto !important;
+        }
+
+        // padding is, though
+        .padding-1rem {
+          padding: 1rem !important;
+        }
+
+        .font-size-large {
+          font-size: 1.25rem !important;
+        }
+
+        @media (min-width: 333px) {
+          .padding-sm-1rem {
+            padding: 1rem !important;
+          }
+        }
+
+        @media (min-width: 666px) {
+          .padding-md-1rem {
+            padding: 1rem !important;
+          }
+        }
+
+        @media print {
+          .font-size-print-large {
+            font-size: 1.25rem !important;
+          }
+        }
+      }
+
+    }
+  }
+}
diff --git a/scss/vendor/_rfs.scss b/scss/vendor/_rfs.scss
index 7e9a6c7..aa1f82b 100644
--- a/scss/vendor/_rfs.scss
+++ b/scss/vendor/_rfs.scss
@@ -1,4 +1,4 @@
-// stylelint-disable property-blacklist, scss/dollar-variable-default
+// stylelint-disable scss/dimension-no-non-numeric-values
 
 // SCSS RFS mixin
 //
@@ -154,8 +154,7 @@ $rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height
     &.enable-rfs {
       @content;
     }
-  }
-  @else {
+  } @else {
     @content;
   }
 }
@@ -168,7 +167,7 @@ $rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height
       @content;
     }
 
-    @include _rfs-media-query {
+    @include _rfs-media-query () {
       .enable-rfs &,
       &.enable-rfs {
         @content;
@@ -182,7 +181,7 @@ $rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height
         @content;
       }
     }
-    @include _rfs-media-query {
+    @include _rfs-media-query () {
       @content;
     }
   }
@@ -193,12 +192,12 @@ $rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height
   // Convert to list
   $values: if(type-of($values) != list, ($values,), $values);
 
-  $val: '';
+  $val: "";
 
   // Loop over each value and calculate value
   @each $value in $values {
     @if $value == 0 {
-      $val: $val + ' 0';
+      $val: $val + " 0";
     }
     @else {
       // Cache $value unit
@@ -206,15 +205,14 @@ $rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height
 
       @if $unit == px {
         // Convert to rem if needed
-        $val: $val + ' ' + if($rfs-unit == rem, #{divide($value, $value * 0 + $rfs-rem-value)}rem, $value);
+        $val: $val + " " + if($rfs-unit == rem, #{divide($value, $value * 0 + $rfs-rem-value)}rem, $value);
       }
       @else if $unit == rem {
         // Convert to px if needed
-        $val: $val + ' ' + if($rfs-unit == px, #{divide($value, $value * 0 + 1) * $rfs-rem-value}px, $value);
-      }
-      @else {
+        $val: $val + " " + if($rfs-unit == px, #{divide($value, $value * 0 + 1) * $rfs-rem-value}px, $value);
+      } @else {
         // If $value isn't a number (like inherit) or $value has a unit (not px or rem, like 1.5em) or $ is 0, just print the value
-        $val: $val + ' ' + $value;
+        $val: $val + " " + $value;
       }
     }
   }
@@ -228,30 +226,26 @@ $rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height
   // Convert to list
   $values: if(type-of($values) != list, ($values,), $values);
 
-  $val: '';
+  $val: "";
 
   // Loop over each value and calculate value
   @each $value in $values {
     @if $value == 0 {
-      $val: $val + ' 0';
-    }
-
-    @else {
+      $val: $val + " 0";
+    } @else {
       // Cache $value unit
       $unit: if(type-of($value) == "number", unit($value), false);
 
       // If $value isn't a number (like inherit) or $value has a unit (not px or rem, like 1.5em) or $ is 0, just print the value
       @if not $unit or $unit != px and $unit != rem {
-        $val: $val + ' ' + $value;
-      }
-
-      @else {
+        $val: $val + " " + $value;
+      } @else {
         // Remove unit from $value for calculations
         $value: divide($value, $value * 0 + if($unit == px, 1, divide(1, $rfs-rem-value)));
 
         // Only add the media query if the value is greater than the minimum value
         @if abs($value) <= $rfs-base-value or not $enable-rfs {
-          $val: $val + ' ' +  if($rfs-unit == rem, #{divide($value, $rfs-rem-value)}rem, #{$value}px);
+          $val: $val + " " + if($rfs-unit == rem, #{divide($value, $rfs-rem-value)}rem, #{$value}px);
         }
         @else {
           // Calculate the minimum value
@@ -273,7 +267,7 @@ $rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height
           $variable-width: #{divide($value-diff * 100, $rfs-breakpoint)}#{$variable-unit};
 
           // Return the calculated value
-          $val: $val + ' calc(' + $min-width + if($value < 0, ' - ', ' + ') + $variable-width + ')';
+          $val: $val + " calc(" + $min-width + if($value < 0, " - ", " + ") + $variable-width + ")";
         }
       }
     }
@@ -287,22 +281,22 @@ $rfs-mq-property-height: if($rfs-mode == max-media-query, max-height, min-height
 @mixin rfs($values, $property: font-size) {
   @if $values != null {
     $val: rfs-value($values);
-    $fluidVal: rfs-fluid-value($values);
+    $fluid-val: rfs-fluid-value($values);
 
     // Do not print the media query if responsive & non-responsive values are the same
-    @if $val == $fluidVal {
+    @if $val == $fluid-val {
       #{$property}: $val;
     }
     @else {
-      @include _rfs-rule {
-        #{$property}: if($rfs-mode == max-media-query, $val, $fluidVal);
+      @include _rfs-rule () {
+        #{$property}: if($rfs-mode == max-media-query, $val, $fluid-val);
 
         // Include safari iframe resize fix if needed
         min-width: if($rfs-safari-iframe-resize-bug-fix, (0 * 1vw), null);
       }
 
-      @include _rfs-media-query-rule {
-        #{$property}: if($rfs-mode == max-media-query, $fluidVal, $val);
+      @include _rfs-media-query-rule () {
+        #{$property}: if($rfs-mode == max-media-query, $fluid-val, $val);
       }
     }
   }