Merge branch 'twbs:main' into mainHEADmain

1 files changed, 408 insertions, 260 deletions

diff --git a/scss/_variables.scss b/scss/_variables.scss
index f6a37b764..9db91c73a 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -60,38 +60,15 @@ $colors: (
   "green":      $green,
   "teal":       $teal,
   "cyan":       $cyan,
+  "black":      $black,
   "white":      $white,
   "gray":       $gray-600,
   "gray-dark":  $gray-800
 ) !default;
 // scss-docs-end colors-map
 
-// scss-docs-start theme-color-variables
-$primary:       $blue !default;
-$secondary:     $gray-600 !default;
-$success:       $green !default;
-$info:          $cyan !default;
-$warning:       $yellow !default;
-$danger:        $red !default;
-$light:         $gray-100 !default;
-$dark:          $gray-900 !default;
-// scss-docs-end theme-color-variables
-
-// scss-docs-start theme-colors-map
-$theme-colors: (
-  "primary":    $primary,
-  "secondary":  $secondary,
-  "success":    $success,
-  "info":       $info,
-  "warning":    $warning,
-  "danger":     $danger,
-  "light":      $light,
-  "dark":       $dark
-) !default;
-// scss-docs-end theme-colors-map
-
-// The contrast ratio to reach against white, to determine if color changes from "light" to "dark". Acceptable values for WCAG 2.0 are 3, 4.5 and 7.
-// See https://www.w3.org/TR/WCAG20/#visual-audio-contrast-contrast
+// The contrast ratio to reach against white, to determine if color changes from "light" to "dark". Acceptable values for WCAG 2.2 are 3, 4.5 and 7.
+// See https://www.w3.org/TR/WCAG/#contrast-minimum
 $min-contrast-ratio:   4.5 !default;
 
 // Customize the light and dark text colors for use in our color contrast function.
@@ -224,8 +201,8 @@ $indigos: (
 ) !default;
 
 $purples: (
-  "purple-100": $purple-200,
-  "purple-200": $purple-100,
+  "purple-100": $purple-100,
+  "purple-200": $purple-200,
   "purple-300": $purple-300,
   "purple-400": $purple-400,
   "purple-500": $purple-500,
@@ -320,6 +297,63 @@ $cyans: (
 ) !default;
 // fusv-enable
 
+// scss-docs-start theme-color-variables
+$primary:       $blue !default;
+$secondary:     $gray-600 !default;
+$success:       $green !default;
+$info:          $cyan !default;
+$warning:       $yellow !default;
+$danger:        $red !default;
+$light:         $gray-100 !default;
+$dark:          $gray-900 !default;
+// scss-docs-end theme-color-variables
+
+// scss-docs-start theme-colors-map
+$theme-colors: (
+  "primary":    $primary,
+  "secondary":  $secondary,
+  "success":    $success,
+  "info":       $info,
+  "warning":    $warning,
+  "danger":     $danger,
+  "light":      $light,
+  "dark":       $dark
+) !default;
+// scss-docs-end theme-colors-map
+
+// scss-docs-start theme-text-variables
+$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"),
@@ -350,9 +384,13 @@ $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
 
-$variable-prefix:             bs- !default;
+$variable-prefix:             bs- !default; // Deprecated in v5.2.0 for the shorter `$prefix`
+$prefix:                      $variable-prefix !default;
 
 // Gradient
 //
@@ -396,9 +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
 //
@@ -413,6 +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.
@@ -467,7 +522,7 @@ $grid-row-columns:            6 !default;
 
 // Container padding
 
-$container-padding-x: $grid-gutter-width * .5 !default;
+$container-padding-x: $grid-gutter-width !default;
 
 
 // Components
@@ -483,16 +538,22 @@ $border-widths: (
   4: 4px,
   5: 5px
 ) !default;
-
+$border-style:                solid !default;
 $border-color:                $gray-300 !default;
+$border-color-translucent:    rgba($black, .175) !default;
 // scss-docs-end border-variables
 
 // scss-docs-start border-radius-variables
-$border-radius:               .25rem !default;
-$border-radius-sm:            .2rem !default;
-$border-radius-lg:            .3rem !default;
+$border-radius:               .375rem !default;
+$border-radius-sm:            .25rem !default;
+$border-radius-lg:            .5rem !default;
+$border-radius-xl:            1rem !default;
+$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;
@@ -504,6 +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;
@@ -534,11 +603,11 @@ $aspect-ratios: (
 
 // scss-docs-start font-variables
 // stylelint-disable value-keyword-case
-$font-family-sans-serif:      system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji" !default;
+$font-family-sans-serif:      system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji" !default;
 $font-family-monospace:       SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace !default;
 // stylelint-enable value-keyword-case
-$font-family-base:            var(--#{$variable-prefix}font-sans-serif) !default;
-$font-family-code:            var(--#{$variable-prefix}font-monospace) !default;
+$font-family-base:            var(--#{$prefix}font-sans-serif) !default;
+$font-family-code:            var(--#{$prefix}font-monospace) !default;
 
 // $font-size-root affects the value of `rem`, which is used for as well font sizes, paddings, and margins
 // $font-size-base affects the font size of the body text
@@ -550,6 +619,8 @@ $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;
 
@@ -584,7 +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
@@ -597,6 +668,8 @@ $display-font-sizes: (
   6: 2.5rem
 ) !default;
 
+$display-font-family: null !default;
+$display-font-style:  null !default;
 $display-font-weight: 300 !default;
 $display-line-height: $headings-line-height !default;
 // scss-docs-end display-headings
@@ -609,7 +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;
 
@@ -620,24 +695,31 @@ $blockquote-footer-font-size: $small-font-size !default;
 
 $hr-margin-y:                 $spacer !default;
 $hr-color:                    inherit !default;
-$hr-bg-color:                 currentColor !default;
-$hr-border-width:             0 !default;
-$hr-height:                   $border-width !default;
+
+// fusv-disable
+$hr-bg-color:                 null !default; // Deprecated in v5.2.0
+$hr-height:                   null !default; // Deprecated in v5.2.0
+// fusv-enable
+
+$hr-border-color:             null !default; // Allows for inherited colors
+$hr-border-width:             var(--#{$prefix}border-width) !default;
 $hr-opacity:                  .25 !default;
 
+// scss-docs-start vr-variables
+$vr-border-width:             var(--#{$prefix}border-width) !default;
+// scss-docs-end vr-variables
+
 $legend-margin-bottom:        .5rem !default;
 $legend-font-size:            1.5rem !default;
 $legend-font-weight:          null !default;
 
-$mark-padding:                .2em !default;
-
 $dt-font-weight:              $font-weight-bold !default;
 
-$nested-kbd-font-weight:      $font-weight-bold !default;
-
 $list-inline-padding:         .5rem !default;
 
-$mark-bg:                     #fcf8e3 !default;
+$mark-padding:                .1875em !default;
+$mark-color:                  $body-color !default;
+$mark-bg:                     $yellow-100 !default;
 // scss-docs-end type-variables
 
 
@@ -653,33 +735,34 @@ $table-cell-padding-x-sm:     .25rem !default;
 
 $table-cell-vertical-align:   top !default;
 
-$table-color:                 $body-color !default;
-$table-bg:                    transparent !default;
+$table-color:                 var(--#{$prefix}emphasis-color) !default;
+$table-bg:                    var(--#{$prefix}body-bg) !default;
 $table-accent-bg:             transparent !default;
 
 $table-th-font-weight:        null !default;
 
 $table-striped-color:         $table-color !default;
 $table-striped-bg-factor:     .05 !default;
-$table-striped-bg:            rgba($black, $table-striped-bg-factor) !default;
+$table-striped-bg:            rgba(var(--#{$prefix}emphasis-color-rgb), $table-striped-bg-factor) !default;
 
 $table-active-color:          $table-color !default;
 $table-active-bg-factor:      .1 !default;
-$table-active-bg:             rgba($black, $table-active-bg-factor) !default;
+$table-active-bg:             rgba(var(--#{$prefix}emphasis-color-rgb), $table-active-bg-factor) !default;
 
 $table-hover-color:           $table-color !default;
 $table-hover-bg-factor:       .075 !default;
-$table-hover-bg:              rgba($black, $table-hover-bg-factor) !default;
+$table-hover-bg:              rgba(var(--#{$prefix}emphasis-color-rgb), $table-hover-bg-factor) !default;
 
-$table-border-factor:         .1 !default;
-$table-border-width:          $border-width !default;
-$table-border-color:          $border-color !default;
+$table-border-factor:         .2 !default;
+$table-border-width:          var(--#{$prefix}border-width) !default;
+$table-border-color:          var(--#{$prefix}border-color) !default;
 
 $table-striped-order:         odd !default;
+$table-striped-columns-order: even !default;
 
-$table-group-separator-color: currentColor !default;
+$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
@@ -709,11 +792,11 @@ $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;
@@ -723,7 +806,7 @@ $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
 
 
@@ -732,6 +815,7 @@ $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;
@@ -756,14 +840,15 @@ $btn-focus-box-shadow:        $input-btn-focus-box-shadow !default;
 $btn-disabled-opacity:        .65 !default;
 $btn-active-box-shadow:       inset 0 3px 5px rgba($black, .125) !default;
 
-$btn-link-color:              $link-color !default;
-$btn-link-hover-color:        $link-hover-color !default;
+$btn-link-color:              var(--#{$prefix}link-color) !default;
+$btn-link-hover-color:        var(--#{$prefix}link-hover-color) !default;
 $btn-link-disabled-color:     $gray-600 !default;
+$btn-link-focus-shadow-rgb:   to-rgb(mix(color-contrast($link-color), $link-color, 15%)) !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;
 
@@ -785,7 +870,7 @@ $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
@@ -812,18 +897,19 @@ $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-disabled-bg:                     $gray-200 !default;
+$input-bg:                              var(--#{$prefix}body-bg) !default;
+$input-disabled-color:                  null !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-box-shadow:                      var(--#{$prefix}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;
@@ -831,10 +917,10 @@ $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;
@@ -861,16 +947,16 @@ $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;
 $form-check-input-checked-border-color:   $form-check-input-checked-bg-color !default;
-$form-check-input-checked-bg-image:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'><path fill='none' stroke='#{$form-check-input-checked-color}' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M6 10l3 3l6-6'/></svg>") !default;
+$form-check-input-checked-bg-image:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'><path fill='none' stroke='#{$form-check-input-checked-color}' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='m6 10 3 3 6-6'/></svg>") !default;
 $form-check-radio-checked-bg-image:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'><circle r='2' fill='#{$form-check-input-checked-color}'/></svg>") !default;
 
 $form-check-input-indeterminate-color:          $component-active-color !default;
@@ -906,7 +992,7 @@ $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
 
@@ -921,12 +1007,12 @@ $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
 $form-select-indicator-color:       $gray-800 !default;
-$form-select-indicator:             url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path fill='none' stroke='#{$form-select-indicator-color}' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/></svg>") !default;
+$form-select-indicator:             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}' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/></svg>") !default;
 
 $form-select-feedback-icon-padding-end: $form-select-padding-x * 2.5 + $form-select-indicator-padding !default;
 $form-select-feedback-icon-position:    center right $form-select-indicator-padding !default;
@@ -935,7 +1021,7 @@ $form-select-feedback-icon-size:        $input-height-inner-half $input-height-i
 $form-select-border-width:        $input-border-width !default;
 $form-select-border-color:        $input-border-color !default;
 $form-select-border-radius:       $input-border-radius !default;
-$form-select-box-shadow:          $box-shadow-inset !default;
+$form-select-box-shadow:          var(--#{$prefix}box-shadow-inset) !default;
 
 $form-select-focus-border-color:  $input-focus-border-color !default;
 $form-select-focus-width:         $input-focus-width !default;
@@ -958,9 +1044,9 @@ $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}secondary-bg) !default;
 $form-range-track-border-radius:  1rem !default;
-$form-range-track-box-shadow:     $box-shadow-inset !default;
+$form-range-track-box-shadow:     var(--#{$prefix}box-shadow-inset) !default;
 
 $form-range-thumb-width:                   1rem !default;
 $form-range-thumb-height:                  $form-range-thumb-width !default;
@@ -971,26 +1057,28 @@ $form-range-thumb-box-shadow:              0 .1rem .25rem rgba($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
@@ -1003,20 +1091,35 @@ $form-feedback-valid-color:         $success !default;
 $form-feedback-invalid-color:       $danger !default;
 
 $form-feedback-icon-valid-color:    $form-feedback-valid-color !default;
-$form-feedback-icon-valid:          url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'><path fill='#{$form-feedback-icon-valid-color}' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/></svg>") !default;
+$form-feedback-icon-valid:          url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'><path fill='#{$form-feedback-icon-valid-color}' d='M2.3 6.73.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1'/></svg>") !default;
 $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
@@ -1036,8 +1139,19 @@ $zindex-modal-backdrop:             1050 !default;
 $zindex-modal:                      1055 !default;
 $zindex-popover:                    1070 !default;
 $zindex-tooltip:                    1080 !default;
+$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
 
@@ -1046,22 +1160,27 @@ $nav-link-padding-y:                .5rem !default;
 $nav-link-padding-x:                1rem !default;
 $nav-link-font-size:                null !default;
 $nav-link-font-weight:              null !default;
-$nav-link-color:                    $link-color !default;
-$nav-link-hover-color:              $link-hover-color !default;
+$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
 
 
@@ -1086,28 +1205,29 @@ $navbar-toggler-font-size:          $font-size-lg !default;
 $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(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
 
-// scss-docs-start navbar-theme-variables
+// scss-docs-start navbar-dark-variables
 $navbar-dark-color:                 rgba($white, .55) !default;
 $navbar-dark-hover-color:           rgba($white, .75) !default;
 $navbar-dark-active-color:          $white !default;
 $navbar-dark-disabled-color:        rgba($white, .25) !default;
-$navbar-dark-toggler-icon-bg:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'><path stroke='#{$navbar-dark-color}' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/></svg>") !default;
+$navbar-dark-icon-color:            $navbar-dark-color !default;
+$navbar-dark-toggler-icon-bg:       url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'><path stroke='#{$navbar-dark-icon-color}' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/></svg>") !default;
 $navbar-dark-toggler-border-color:  rgba($white, .1) !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-brand-color:                $navbar-light-active-color !default;
-$navbar-light-brand-hover-color:          $navbar-light-active-color !default;
-$navbar-dark-brand-color:                 $navbar-dark-active-color !default;
-$navbar-dark-brand-hover-color:           $navbar-dark-active-color !default;
-// scss-docs-end navbar-theme-variables
+$navbar-dark-brand-color:           $navbar-dark-active-color !default;
+$navbar-dark-brand-hover-color:     $navbar-dark-active-color !default;
+// scss-docs-end navbar-dark-variables
 
 
 // Dropdowns
@@ -1120,30 +1240,34 @@ $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-border-color:             rgba($black, .15) !default;
-$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-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:            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-box-shadow:               var(--#{$prefix}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;
 
 $dropdown-header-color:             $gray-600 !default;
-$dropdown-header-padding:           $dropdown-padding-y $dropdown-item-padding-x !default;
+$dropdown-header-padding-x:         $dropdown-item-padding-x !default;
+$dropdown-header-padding-y:         $dropdown-padding-y !default;
+// fusv-disable
+$dropdown-header-padding:           $dropdown-header-padding-y $dropdown-header-padding-x !default; // Deprecated in v5.2.0
+// fusv-enable
 // scss-docs-end dropdown-variables
 
 // scss-docs-start dropdown-dark-variables
@@ -1172,34 +1296,36 @@ $pagination-padding-x-sm:           .5rem !default;
 $pagination-padding-y-lg:           .75rem !default;
 $pagination-padding-x-lg:           1.5rem !default;
 
-$pagination-color:                  $link-color !default;
-$pagination-bg:                     $white !default;
-$pagination-border-width:           $border-width !default;
-$pagination-border-radius:          $border-radius !default;
-$pagination-margin-start:           -$pagination-border-width !default;
-$pagination-border-color:           $gray-300 !default;
+$pagination-font-size:              $font-size-base !default;
 
-$pagination-focus-color:            $link-hover-color !default;
-$pagination-focus-bg:               $gray-200 !default;
-$pagination-focus-box-shadow:       $input-btn-focus-box-shadow !default;
+$pagination-color:                  var(--#{$prefix}link-color) !default;
+$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:               var(--#{$prefix}secondary-bg) !default;
+$pagination-focus-box-shadow:       $focus-ring-box-shadow !default;
 $pagination-focus-outline:          0 !default;
 
-$pagination-hover-color:            $link-hover-color !default;
-$pagination-hover-bg:               $gray-200 !default;
-$pagination-hover-border-color:     $gray-300 !default;
+$pagination-hover-color:            var(--#{$prefix}link-hover-color) !default;
+$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
 
 
@@ -1216,18 +1342,20 @@ $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-border-color:                 rgba($black, .125) !default;
-$card-border-radius:                $border-radius !default;
+$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:                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
@@ -1237,11 +1365,11 @@ $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:                         $body-color !default;
-$accordion-bg:                            $body-bg !default;
-$accordion-border-width:                  $border-width !default;
-$accordion-border-color:                  rgba($black, .125) !default;
-$accordion-border-radius:                 $border-radius !default;
+$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:                 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;
@@ -1249,23 +1377,25 @@ $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-bg:                     $accordion-bg !default;
+$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:     $input-focus-border-color !default;
+// fusv-disable
+$accordion-button-focus-border-color:     $input-focus-border-color !default; // Deprecated in v5.3.3
+// fusv-enable
 $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;
 
-$accordion-button-icon:         url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$accordion-icon-color}'><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;
-$accordion-button-active-icon:  url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$accordion-icon-active-color}'><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;
+$accordion-button-icon:         url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='#{$accordion-icon-color}' stroke-linecap='round' stroke-linejoin='round'><path d='m2 5 6 6 6-6'/></svg>") !default;
+$accordion-button-active-icon:  url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='#{$accordion-icon-active-color}' stroke-linecap='round' stroke-linejoin='round'><path d='m2 5 6 6 6-6'/></svg>") !default;
 // scss-docs-end accordion-variables
 
 // Tooltips
@@ -1273,17 +1403,19 @@ $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:                 $spacer * .5 !default;
-$tooltip-margin:                    0 !default;
+$tooltip-margin:                    null !default; // TODO: remove this in v6
 
 $tooltip-arrow-width:               .8rem !default;
 $tooltip-arrow-height:              .4rem !default;
-$tooltip-arrow-color:               $tooltip-bg !default;
+// fusv-disable
+$tooltip-arrow-color:               null !default; // Deprecated in Bootstrap 5.2.0 for CSS variables
+// fusv-enable
 // scss-docs-end tooltip-variables
 
 // Form tooltips must come after regular tooltips
@@ -1301,30 +1433,34 @@ $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-color:              rgba($black, .2) !default;
-$popover-border-radius:             $border-radius-lg !default;
-$popover-inner-border-radius:       subtract($popover-border-radius, $popover-border-width) !default;
-$popover-box-shadow:                $box-shadow !default;
-
-$popover-header-bg:                 shade-color($popover-bg, 6%) !default;
+$popover-border-width:              var(--#{$prefix}border-width) !default;
+$popover-border-color:              var(--#{$prefix}border-color-translucent) !default;
+$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
+$popover-box-shadow:                var(--#{$prefix}box-shadow) !default;
+
+$popover-header-font-size:          $font-size-base !default;
+$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;
 
 $popover-arrow-width:               1rem !default;
 $popover-arrow-height:              .5rem !default;
-$popover-arrow-color:               $popover-bg !default;
-
-$popover-arrow-outer-color:         fade-in($popover-border-color, .05) !default;
 // scss-docs-end popover-variables
 
+// fusv-disable
+// Deprecated in Bootstrap 5.2.0 for CSS variables
+$popover-arrow-color:               $popover-bg !default;
+$popover-arrow-outer-color:         var(--#{$prefix}border-color-translucent) !default;
+// fusv-enable
+
 
 // Toasts
 
@@ -1334,16 +1470,16 @@ $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:                1px !default;
-$toast-border-color:                rgba($black, .1) !default;
-$toast-border-radius:               $border-radius !default;
-$toast-box-shadow:                  $box-shadow !default;
+$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:               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
 
 
@@ -1355,7 +1491,7 @@ $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
 
 
@@ -1372,24 +1508,27 @@ $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-border-color:        rgba($black, .2) !default;
-$modal-content-border-width:        $border-width !default;
-$modal-content-border-radius:       $border-radius-lg !default;
+$modal-content-bg:                  var(--#{$prefix}body-bg) !default;
+$modal-content-border-color:        var(--#{$prefix}border-color-translucent) !default;
+$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:    $box-shadow !default;
+$modal-content-box-shadow-xs:       var(--#{$prefix}box-shadow-sm) !default;
+$modal-content-box-shadow-sm-up:    var(--#{$prefix}box-shadow) !default;
 
 $modal-backdrop-bg:                 $black !default;
 $modal-backdrop-opacity:            .5 !default;
-$modal-header-border-color:         $border-color !default;
-$modal-footer-border-color:         $modal-header-border-color !default;
+
+$modal-header-border-color:         var(--#{$prefix}border-color) !default;
 $modal-header-border-width:         $modal-content-border-width !default;
-$modal-footer-border-width:         $modal-header-border-width !default;
 $modal-header-padding-y:            $modal-inner-padding !default;
 $modal-header-padding-x:            $modal-inner-padding !default;
 $modal-header-padding:              $modal-header-padding-y $modal-header-padding-x !default; // Keep this for backwards compatibility
 
+$modal-footer-bg:                   null !default;
+$modal-footer-border-color:         $modal-header-border-color !default;
+$modal-footer-border-width:         $modal-header-border-width !default;
+
 $modal-sm:                          300px !default;
 $modal-md:                          500px !default;
 $modal-lg:                          800px !default;
@@ -1410,24 +1549,26 @@ $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-bg-scale:                -80% !default;
-$alert-border-scale:            -70% !default;
-$alert-color-scale:             40% !default;
+$alert-border-width:            var(--#{$prefix}border-width) !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;
@@ -1438,30 +1579,32 @@ $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
 
 
@@ -1469,11 +1612,11 @@ $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-border-color:            $gray-300 !default;
-$thumbnail-border-radius:           $border-radius !default;
-$thumbnail-box-shadow:              $box-shadow-sm !default;
+$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:           var(--#{$prefix}border-radius) !default;
+$thumbnail-box-shadow:              var(--#{$prefix}box-shadow-sm) !default;
 // scss-docs-end thumbnail-variables
 
 
@@ -1481,7 +1624,7 @@ $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
 
 
@@ -1494,8 +1637,8 @@ $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;
@@ -1526,16 +1669,18 @@ $carousel-caption-spacer:            1.25rem !default;
 
 $carousel-control-icon-width:        2rem !default;
 
-$carousel-control-prev-icon-bg:      url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$carousel-control-color}'><path d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/></svg>") !default;
-$carousel-control-next-icon-bg:      url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$carousel-control-color}'><path d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z'/></svg>") !default;
+$carousel-control-prev-icon-bg:      url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$carousel-control-color}'><path d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0'/></svg>") !default;
+$carousel-control-next-icon-bg:      url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$carousel-control-color}'><path d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708'/></svg>") !default;
 
 $carousel-transition-duration:       .6s !default;
 $carousel-transition:                transform $carousel-transition-duration ease-in-out !default; // Define transform transition first if using multiple transitions (e.g., `transform 2s ease, opacity .5s ease-out`)
+// scss-docs-end carousel-variables
 
+// scss-docs-start carousel-dark-variables
 $carousel-dark-indicator-active-bg:  $black !default;
 $carousel-dark-caption-color:        $black !default;
 $carousel-dark-control-icon-filter:  invert(1) grayscale(100) !default;
-// scss-docs-end carousel-variables
+// scss-docs-end carousel-dark-variables
 
 
 // Spinners
@@ -1561,8 +1706,8 @@ $btn-close-height:           $btn-close-width !default;
 $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='#{$btn-close-color}'><path d='M.293.293a1 1 0 011.414 0L8 6.586 14.293.293a1 1 0 111.414 1.414L9.414 8l6.293 6.293a1 1 0 01-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 01-1.414-1.414L6.586 8 .293 1.707a1 1 0 010-1.414z'/></svg>") !default;
-$btn-close-focus-shadow:     $input-btn-focus-box-shadow !default;
+$btn-close-bg:               url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$btn-close-color}'><path d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414'/></svg>") !default;
+$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;
@@ -1582,8 +1727,8 @@ $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;
@@ -1594,10 +1739,13 @@ $offcanvas-backdrop-opacity:        $modal-backdrop-opacity !default;
 $code-font-size:                    $small-font-size !default;
 $code-color:                        $pink !default;
 
-$kbd-padding-y:                     .2rem !default;
-$kbd-padding-x:                     .4rem !default;
+$kbd-padding-y:                     .1875rem !default;
+$kbd-padding-x:                     .375rem !default;
 $kbd-font-size:                     $code-font-size !default;
-$kbd-color:                         $white !default;
-$kbd-bg:                            $gray-900 !default;
+$kbd-color:                         var(--#{$prefix}body-bg) !default;
+$kbd-bg:                            var(--#{$prefix}body-color) !default;
+$nested-kbd-font-weight:            null !default; // Deprecated in v5.2.0, removing in v6
 
 $pre-color:                         null !default;
+
+@import "variables-dark"; // TODO: can be removed safely in v6, only here to avoid breaking changes in v5.3