diff --git a/core/themes/claro/css/layout/node-add.css b/core/themes/claro/css/layout/node-add.css
index 46c4f8a673c..a2c8cce0210 100644
--- a/core/themes/claro/css/layout/node-add.css
+++ b/core/themes/claro/css/layout/node-add.css
@@ -20,7 +20,7 @@
   .layout-node-form {
     display: grid;
     grid-template-rows: auto 1fr;
-    grid-template-columns: 3fr minmax(22.5rem, 1fr);
+    grid-template-columns: minmax(0, 3fr) minmax(22.5rem, 1fr);
     gap: var(--space-l);
   }
 
diff --git a/core/themes/claro/css/layout/node-add.pcss.css b/core/themes/claro/css/layout/node-add.pcss.css
index f3c3e8587fa..8286afab626 100644
--- a/core/themes/claro/css/layout/node-add.pcss.css
+++ b/core/themes/claro/css/layout/node-add.pcss.css
@@ -16,7 +16,7 @@
   .layout-node-form {
     display: grid;
     grid-template-rows: auto 1fr;
-    grid-template-columns: 3fr minmax(360px, 1fr);
+    grid-template-columns: minmax(0, 3fr) minmax(360px, 1fr);
     gap: var(--space-l);
   }