diff --git a/core/themes/claro/css/base/variables.css b/core/themes/claro/css/base/variables.css
index 5dcccbf2608..80e8ca32d77 100644
--- a/core/themes/claro/css/base/variables.css
+++ b/core/themes/claro/css/base/variables.css
@@ -253,4 +253,30 @@
    */
   --layout-region-edit-width: min(60rem, 100%);
   --layout-region-edit-extended-width: min(68rem, 100%);
+  /**
+   * Vertical Tabs.
+   *
+   * These are shared between the vertical tabs and media library.
+   * @see ../components/vertical-tabs.pcss.css
+   * @see ../theme/media-library.pcss.css
+   */
+  --vertical-tabs-margin-vertical: var(--space-s);
+  --vertical-tabs-border-radius: var(--details-accordion-border-size-radius);
+  --vertical-tabs-shadow: var(--details-box-shadow);
+  --vertical-tabs-border-color: var(--details-border-color);
+  --vertical-tabs-border-size: 1px;
+  --vertical-tabs-border: var(--vertical-tabs-border-size) solid var(--vertical-tabs-border-color);
+  --vertical-tabs-menu-item-shadow-extraspace: 0.5rem;
+  --vertical-tabs-menu-item--top-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -2);
+  --vertical-tabs-menu-item--right-margin: calc(var(--vertical-tabs-border-size) * -1);
+  --vertical-tabs-menu-item--bottom-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -1);
+  --vertical-tabs-menu-item--left-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -1);
+  --vertical-tabs-menu-separator-color: var(--color-gray-200);
+  --vertical-tabs-menu-separator-size: 1px;
+  --vertical-tabs-menu-width: 20em;
+  --vertical-tabs-pane-width: calc(100% - var(--vertical-tabs-menu-width));
+  --vertical-tabs-menu-link-focus-border-size: var(--details-summary-focus-border-size);
+  --vertical-tabs-menu-link--active-border-size: 0.25rem;
+  --vertical-tabs-menu-link--active-border-color: var(--color-absolutezero);
+  --vertical-tabs-menu--z-index: 0;
 }
diff --git a/core/themes/claro/css/base/variables.pcss.css b/core/themes/claro/css/base/variables.pcss.css
index 202787031f3..96f738aa269 100644
--- a/core/themes/claro/css/base/variables.pcss.css
+++ b/core/themes/claro/css/base/variables.pcss.css
@@ -247,4 +247,30 @@
    */
   --layout-region-edit-width: min(960px, 100%);
   --layout-region-edit-extended-width: min(1088px, 100%);
+  /**
+   * Vertical Tabs.
+   *
+   * These are shared between the vertical tabs and media library.
+   * @see ../components/vertical-tabs.pcss.css
+   * @see ../theme/media-library.pcss.css
+   */
+  --vertical-tabs-margin-vertical: var(--space-s);
+  --vertical-tabs-border-radius: var(--details-accordion-border-size-radius);
+  --vertical-tabs-shadow: var(--details-box-shadow);
+  --vertical-tabs-border-color: var(--details-border-color);
+  --vertical-tabs-border-size: 1px;
+  --vertical-tabs-border: var(--vertical-tabs-border-size) solid var(--vertical-tabs-border-color);
+  --vertical-tabs-menu-item-shadow-extraspace: 0.5rem;
+  --vertical-tabs-menu-item--top-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -2);
+  --vertical-tabs-menu-item--right-margin: calc(var(--vertical-tabs-border-size) * -1);
+  --vertical-tabs-menu-item--bottom-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -1);
+  --vertical-tabs-menu-item--left-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -1);
+  --vertical-tabs-menu-separator-color: var(--color-gray-200);
+  --vertical-tabs-menu-separator-size: 1px;
+  --vertical-tabs-menu-width: 20em;
+  --vertical-tabs-pane-width: calc(100% - var(--vertical-tabs-menu-width));
+  --vertical-tabs-menu-link-focus-border-size: var(--details-summary-focus-border-size);
+  --vertical-tabs-menu-link--active-border-size: 4px;
+  --vertical-tabs-menu-link--active-border-color: var(--color-absolutezero);
+  --vertical-tabs-menu--z-index: 0;
 }
diff --git a/core/themes/claro/css/components/vertical-tabs.css b/core/themes/claro/css/components/vertical-tabs.css
index f00e953cbb0..85d0f0f82f3 100644
--- a/core/themes/claro/css/components/vertical-tabs.css
+++ b/core/themes/claro/css/components/vertical-tabs.css
@@ -12,31 +12,6 @@
  * Replaces /core/misc/vertical-tabs.css.
  */
 
-:root {
-  /**
-   * Vertical Tabs.
-   */
-  --vertical-tabs-margin-vertical: var(--space-s);
-  --vertical-tabs-border-radius: var(--details-accordion-border-size-radius);
-  --vertical-tabs-shadow: var(--details-box-shadow);
-  --vertical-tabs-border-color: var(--details-border-color);
-  --vertical-tabs-border-size: 1px;
-  --vertical-tabs-border: var(--vertical-tabs-border-size) solid var(--vertical-tabs-border-color);
-  --vertical-tabs-menu-item-shadow-extraspace: 0.5rem;
-  --vertical-tabs-menu-item--top-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -2);
-  --vertical-tabs-menu-item--right-margin: calc(var(--vertical-tabs-border-size) * -1);
-  --vertical-tabs-menu-item--bottom-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -1);
-  --vertical-tabs-menu-item--left-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -1);
-  --vertical-tabs-menu-separator-color: var(--color-gray-200);
-  --vertical-tabs-menu-separator-size: 1px;
-  --vertical-tabs-menu-width: 20em;
-  --vertical-tabs-pane-width: calc(100% - var(--vertical-tabs-menu-width));
-  --vertical-tabs-menu-link-focus-border-size: var(--details-summary-focus-border-size);
-  --vertical-tabs-menu-link--active-border-size: 0.25rem;
-  --vertical-tabs-menu-link--active-border-color: var(--color-absolutezero);
-  --vertical-tabs-menu--z-index: 0;
-}
-
 /**
  * Main wrapper of vertical tabs.
  * This wrapper div is added by JavaScript.
diff --git a/core/themes/claro/css/components/vertical-tabs.pcss.css b/core/themes/claro/css/components/vertical-tabs.pcss.css
index c85061f70b8..7c38c47e95c 100644
--- a/core/themes/claro/css/components/vertical-tabs.pcss.css
+++ b/core/themes/claro/css/components/vertical-tabs.pcss.css
@@ -5,31 +5,6 @@
  * Replaces /core/misc/vertical-tabs.css.
  */
 
-:root {
-  /**
-   * Vertical Tabs.
-   */
-  --vertical-tabs-margin-vertical: var(--space-s);
-  --vertical-tabs-border-radius: var(--details-accordion-border-size-radius);
-  --vertical-tabs-shadow: var(--details-box-shadow);
-  --vertical-tabs-border-color: var(--details-border-color);
-  --vertical-tabs-border-size: 1px;
-  --vertical-tabs-border: var(--vertical-tabs-border-size) solid var(--vertical-tabs-border-color);
-  --vertical-tabs-menu-item-shadow-extraspace: 0.5rem;
-  --vertical-tabs-menu-item--top-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -2);
-  --vertical-tabs-menu-item--right-margin: calc(var(--vertical-tabs-border-size) * -1);
-  --vertical-tabs-menu-item--bottom-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -1);
-  --vertical-tabs-menu-item--left-margin: calc(var(--vertical-tabs-menu-item-shadow-extraspace) * -1);
-  --vertical-tabs-menu-separator-color: var(--color-gray-200);
-  --vertical-tabs-menu-separator-size: 1px;
-  --vertical-tabs-menu-width: 20em;
-  --vertical-tabs-pane-width: calc(100% - var(--vertical-tabs-menu-width));
-  --vertical-tabs-menu-link-focus-border-size: var(--details-summary-focus-border-size);
-  --vertical-tabs-menu-link--active-border-size: 4px;
-  --vertical-tabs-menu-link--active-border-color: var(--color-absolutezero);
-  --vertical-tabs-menu--z-index: 0;
-}
-
 /**
  * Main wrapper of vertical tabs.
  * This wrapper div is added by JavaScript.