diff --git a/web-ui/src/app/cases/[caseNumber]/page.tsx b/web-ui/src/app/cases/[caseNumber]/page.tsx
index f72b0e8..179abcc 100644
--- a/web-ui/src/app/cases/[caseNumber]/page.tsx
+++ b/web-ui/src/app/cases/[caseNumber]/page.tsx
@@ -149,8 +149,8 @@ export default function CaseDetailPage({
             StatusRail (banner A, X17), so every tab keeps the status context. */}
         <div className="min-w-0 mt-6">
           <TabsContent value="overview" className="mt-0">
-            {/* documents + agents two-column (mockup 18j) */}
-            <div className="grid gap-6 lg:grid-cols-2 items-start">
+            {/* documents (wider) + agent-activity preview (mockup 18j) */}
+            <div className="grid gap-6 lg:grid-cols-[1.4fr_1fr] items-start">
               <DocumentsPanel data={data} />
               <AgentActivityPreview caseNumber={caseNumber} />
             </div>