diff --git a/components/PublicGrid.tsx b/components/PublicGrid.tsx
index 9831b3b..6793f2d 100644
--- a/components/PublicGrid.tsx
+++ b/components/PublicGrid.tsx
@@ -519,6 +519,10 @@ function FlipBook({ pages, onClose }: { pages: string[]; onClose: () => void })
         aria-label="Chiudi"
       >✕</button>
 
+      <style dangerouslySetInnerHTML={{ __html: `
+        .stf__item.--left  { box-shadow: inset -10px 0 16px -10px rgba(0,0,0,0.5); }
+        .stf__item.--right { box-shadow: inset  10px 0 16px -10px rgba(0,0,0,0.5); }
+      `}} />
       <div
         ref={containerRef}
         style={{