diff --git a/frontend/src/components/tools/ToolPanel.tsx b/frontend/src/components/tools/ToolPanel.tsx
index edbf4654d..e3897ba82 100644
--- a/frontend/src/components/tools/ToolPanel.tsx
+++ b/frontend/src/components/tools/ToolPanel.tsx
@@ -56,7 +56,7 @@ export default function ToolPanel() {
 
     if (isFullscreenMode) {
       if (isCatalogActive) {
-        return '100%';
+        return 'clamp(32rem, 48vw, 56rem)';
       }
 
       if (leftPanelView === 'toolContent' && isPanelVisible) {
@@ -79,7 +79,6 @@ export default function ToolPanel() {
       style={{
         width: computedWidth(),
         padding: '0',
-        flex: isCatalogActive ? '1 1 auto' : undefined,
       }}
     >
       <div
diff --git a/frontend/src/pages/HomePage.css b/frontend/src/pages/HomePage.css
index ff49d34d2..ea2355854 100644
--- a/frontend/src/pages/HomePage.css
+++ b/frontend/src/pages/HomePage.css
@@ -199,21 +199,3 @@
   flex: 0 0 auto;
 }
 
-.home-desktop-layout--catalog .home-desktop-layout__quick {
-  max-width: 0;
-  transform: translateX(-100%);
-  opacity: 0;
-  pointer-events: none;
-}
-
-.home-desktop-layout--catalog .home-desktop-layout__tool-panel {
-  flex: 1 1 auto;
-}
-
-.home-desktop-layout--catalog .home-desktop-layout__workbench,
-.home-desktop-layout--catalog .home-desktop-layout__right-rail {
-  max-width: 0;
-  opacity: 0;
-  transform: translateX(2rem);
-  pointer-events: none;
-}
diff --git a/frontend/src/pages/HomePage.tsx b/frontend/src/pages/HomePage.tsx
index 379d4c31f..94bfea8f9 100644
--- a/frontend/src/pages/HomePage.tsx
+++ b/frontend/src/pages/HomePage.tsx
@@ -132,8 +132,6 @@ export default function HomePage() {
 
   // Note: File selection limits are now handled directly by individual tools
 
-  const desktopCatalogActive = !isMobile && toolPanelMode === 'fullscreen' && leftPanelView === 'toolPicker';
-
   return (
     <div className="h-screen overflow-hidden">
       <ToolPanelModePrompt />
@@ -240,7 +238,7 @@ export default function HomePage() {
           align="flex-start"
           gap={0}
           h="100%"
-          className={`flex-nowrap flex home-desktop-layout ${desktopCatalogActive ? 'home-desktop-layout--catalog' : ''}`}
+          className="flex-nowrap flex home-desktop-layout"
         >
           <div className="home-desktop-layout__quick">
             <QuickAccessBar
@@ -250,10 +248,10 @@ export default function HomePage() {
           <div className="home-desktop-layout__tool-panel">
             <ToolPanel />
           </div>
-          <div className="home-desktop-layout__workbench" aria-hidden={desktopCatalogActive}>
+          <div className="home-desktop-layout__workbench">
             <Workbench />
           </div>
-          <div className="home-desktop-layout__right-rail" aria-hidden={desktopCatalogActive}>
+          <div className="home-desktop-layout__right-rail">
             <RightRail />
           </div>
           <FileManager selectedTool={selectedTool as any /* FIX ME */} />