diff --git a/frontend/src/components/viewer/EmbedPdfViewer.tsx b/frontend/src/components/viewer/EmbedPdfViewer.tsx
index 09860e517..cd1c5ece4 100644
--- a/frontend/src/components/viewer/EmbedPdfViewer.tsx
+++ b/frontend/src/components/viewer/EmbedPdfViewer.tsx
@@ -63,18 +63,36 @@ const EmbedPdfViewerContent = ({
 
   // Handle scroll wheel zoom
   React.useEffect(() => {
+    let accumulator = 0;
+
     const handleWheel = (event: WheelEvent) => {
       // Check if Ctrl (Windows/Linux) or Cmd (Mac) is pressed
       if (event.ctrlKey || event.metaKey) {
         event.preventDefault();
         event.stopPropagation();
 
+<<<<<<< HEAD
         if (event.deltaY < 0) {
           // Scroll up - zoom in
           zoomActions.zoomIn();
         } else {
           // Scroll down - zoom out
           zoomActions.zoomOut();
+=======
+        // Convert smooth scrolling gestures into discrete notches
+        accumulator += event.deltaY;
+        const threshold = 10;
+
+        const zoomAPI = window.embedPdfZoom;
+        if (zoomAPI) {
+          if (accumulator <= -threshold) {
+            zoomAPI.zoomIn();
+            accumulator = 0;
+          } else if (accumulator >= threshold) {
+            zoomAPI.zoomOut();
+            accumulator = 0;
+          }
+>>>>>>> 81c5d8ff46dcc5fc983109fb2348b6d6dfb129d2
         }
       }
     };
@@ -113,16 +131,27 @@ const EmbedPdfViewerContent = ({
     };
   }, [isViewerHovered]);
 
+<<<<<<< HEAD
+=======
+  // Expose toggle functions globally for right rail buttons
+  React.useEffect(() => {
+    window.toggleThumbnailSidebar = toggleThumbnailSidebar;
+
+    return () => {
+      delete window.toggleThumbnailSidebar;
+    };
+  }, [toggleThumbnailSidebar]);
+>>>>>>> 81c5d8ff46dcc5fc983109fb2348b6d6dfb129d2
 
   return (
-    <Box 
+    <Box
       ref={viewerRef}
       onMouseEnter={() => setIsViewerHovered(true)}
       onMouseLeave={() => setIsViewerHovered(false)}
-      style={{ 
-        position: 'relative', 
-        height: '100%', 
-        display: 'flex', 
+      style={{
+        position: 'relative',
+        height: '100%',
+        display: 'flex',
         flexDirection: 'column',
         overflow: 'hidden',
         contain: 'layout style paint'
@@ -156,12 +185,14 @@ const EmbedPdfViewerContent = ({
           )}
 
           {/* EmbedPDF Viewer */}
-          <Box style={{ 
-            position: 'relative', 
-            flex: 1, 
+          <Box style={{
+            position: 'relative',
+            flex: 1,
             overflow: 'hidden',
             minHeight: 0,
-            minWidth: 0
+            minWidth: 0,
+            marginRight: isThumbnailSidebarVisible ? '15rem' : '0',
+            transition: 'margin-right 0.3s ease'
           }}>
             <LocalEmbedPDF
               file={effectiveFile.file}
@@ -220,4 +251,4 @@ const EmbedPdfViewer = (props: EmbedPdfViewerProps) => {
   return <EmbedPdfViewerContent {...props} />;
 };
 
-export default EmbedPdfViewer;
\ No newline at end of file
+export default EmbedPdfViewer;
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index d957fa3f0..dd596b1aa 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -12,4 +12,5 @@ export default defineConfig({
       },
     },
   },
+  base: "http://localhost:8080",
 });