diff --git a/frontend/web/styles/3rdParty/_bootstrap.scss b/frontend/web/styles/3rdParty/_bootstrap.scss
index be1dfef20f65..b04f1cf84a4b 100644
--- a/frontend/web/styles/3rdParty/_bootstrap.scss
+++ b/frontend/web/styles/3rdParty/_bootstrap.scss
@@ -29,6 +29,26 @@ $_color-util: map-merge(
 );
 $utilities: map-merge($utilities, ("color": $_color-util));
 
+// Border colour: token border utilities take over. Values are identical to
+// Bootstrap's, so a no-op; it just moves ownership to the token layer.
+$_border-util: map-get($utilities, "border-color");
+$_border-util: map-merge(
+  $_border-util,
+  (values: map-remove(map-get($_border-util, "values"), "danger", "info", "success", "warning"))
+);
+$utilities: map-merge($utilities, ("border-color": $_border-util));
+
+// Shadow scale is owned by the token utilities (--shadow-*). Drop sm/lg/none so
+// `.shadow-sm` / `.shadow-lg` / `.shadow-none` use the DS tokens, consistent with
+// the token-only `.shadow-md` / `.shadow-xl`. Bootstrap's suffixless `.shadow`
+// (the `null` key) is left in place.
+$_shadow-util: map-get($utilities, "shadow");
+$_shadow-util: map-merge(
+  $_shadow-util,
+  (values: map-remove(map-get($_shadow-util, "values"), "sm", "lg", "none"))
+);
+$utilities: map-merge($utilities, ("shadow": $_shadow-util));
+
 @import "~bootstrap/scss/utilities/api";
 
 // 5. Include any optional Bootstrap CSS as needed