Index: lams_central/web/css/bootstrap/_toasts.scss
===================================================================
diff -u -r9f4482aa1d29f454f091420cc38d3b27a3f4cc8f -rb7c92dbcfdb0469dbc0144190a201757f398e529
--- lams_central/web/css/bootstrap/_toasts.scss	(.../_toasts.scss)	(revision 9f4482aa1d29f454f091420cc38d3b27a3f4cc8f)
+++ lams_central/web/css/bootstrap/_toasts.scss	(.../_toasts.scss)	(revision b7c92dbcfdb0469dbc0144190a201757f398e529)
@@ -1,14 +1,31 @@
 .toast {
-  width: $toast-max-width;
+  // scss-docs-start toast-css-vars
+  --#{$prefix}toast-padding-x: #{$toast-padding-x};
+  --#{$prefix}toast-padding-y: #{$toast-padding-y};
+  --#{$prefix}toast-spacing: #{$toast-spacing};
+  --#{$prefix}toast-max-width: #{$toast-max-width};
+  @include rfs($toast-font-size, --#{$prefix}toast-font-size);
+  --#{$prefix}toast-color: #{$toast-color}; // stylelint-disable-line custom-property-empty-line-before
+  --#{$prefix}toast-bg: #{$toast-background-color};
+  --#{$prefix}toast-border-width: #{$toast-border-width};
+  --#{$prefix}toast-border-color: #{$toast-border-color};
+  --#{$prefix}toast-border-radius: #{$toast-border-radius};
+  --#{$prefix}toast-box-shadow: #{$toast-box-shadow};
+  --#{$prefix}toast-header-color: #{$toast-header-color};
+  --#{$prefix}toast-header-bg: #{$toast-header-background-color};
+  --#{$prefix}toast-header-border-color: #{$toast-header-border-color};
+  // scss-docs-end toast-css-vars
+
+  width: var(--#{$prefix}toast-max-width);
   max-width: 100%;
-  @include font-size($toast-font-size);
-  color: $toast-color;
+  @include font-size(var(--#{$prefix}toast-font-size));
+  color: var(--#{$prefix}toast-color);
   pointer-events: auto;
-  background-color: $toast-background-color;
+  background-color: var(--#{$prefix}toast-bg);
   background-clip: padding-box;
-  border: $toast-border-width solid $toast-border-color;
-  box-shadow: $toast-box-shadow;
-  @include border-radius($toast-border-radius);
+  border: var(--#{$prefix}toast-border-width) solid var(--#{$prefix}toast-border-color);
+  box-shadow: var(--#{$prefix}toast-box-shadow);
+  @include border-radius(var(--#{$prefix}toast-border-radius));
 
   &.showing {
     opacity: 0;
@@ -20,32 +37,34 @@
 }
 
 .toast-container {
+  position: absolute;
+  z-index: $zindex-toast;
   width: max-content;
   max-width: 100%;
   pointer-events: none;
 
   > :not(:last-child) {
-    margin-bottom: $toast-spacing;
+    margin-bottom: var(--#{$prefix}toast-spacing);
   }
 }
 
 .toast-header {
   display: flex;
   align-items: center;
-  padding: $toast-padding-y $toast-padding-x;
-  color: $toast-header-color;
-  background-color: $toast-header-background-color;
+  padding: var(--#{$prefix}toast-padding-y) var(--#{$prefix}toast-padding-x);
+  color: var(--#{$prefix}toast-header-color);
+  background-color: var(--#{$prefix}toast-header-bg);
   background-clip: padding-box;
-  border-bottom: $toast-border-width solid $toast-header-border-color;
-  @include border-top-radius(subtract($toast-border-radius, $toast-border-width));
+  border-bottom: var(--#{$prefix}toast-border-width) solid var(--#{$prefix}toast-header-border-color);
+  @include border-top-radius(calc(var(--#{$prefix}toast-border-radius) - var(--#{$prefix}toast-border-width)));
 
   .btn-close {
-    margin-right: $toast-padding-x * -.5;
-    margin-left: $toast-padding-x;
+    margin-right: calc(var(--#{$prefix}toast-padding-x) * -.5); // stylelint-disable-line function-disallowed-list
+    margin-left: var(--#{$prefix}toast-padding-x);
   }
 }
 
 .toast-body {
-  padding: $toast-padding-x; // apply to both vertical and horizontal
+  padding: var(--#{$prefix}toast-padding-x);
   word-wrap: break-word;
 }