diff --git a/components/PublicGrid.tsx b/components/PublicGrid.tsx
index fe660f2..63b95a7 100644
--- a/components/PublicGrid.tsx
+++ b/components/PublicGrid.tsx
@@ -501,40 +501,25 @@ function FlipBook({ pages, onClose }: { pages: string[]; onClose: () => void })
       <div
         className="relative shadow-2xl"
         style={{
-          width: 'min(95vw, 1400px)',
-          height: 'min(85vh, 900px)',
+          // Two A4 pages side-by-side: aspect ratio ≈ 1.41:1 (2 × 0.707).
+          // Cap by 95vw and 90vh so the book never overflows.
+          width: 'min(95vw, calc(90vh * 1.41))',
+          aspectRatio: '1.41 / 1',
+          maxHeight: '90vh',
           transformStyle: 'preserve-3d',
         }}
       >
         {/* Static left page */}
-        {visibleLeft ? (
+        {visibleLeft && (
           <div className="absolute left-0 top-0 w-1/2 h-full bg-white overflow-hidden flex items-center justify-center">
             <img src={visibleLeft} className={pageImgClass} alt="" draggable={false} />
           </div>
-        ) : (
-          <div
-            className="absolute left-0 top-0 w-1/2 h-full overflow-hidden"
-            style={{
-              background: 'linear-gradient(135deg, #4a3826 0%, #2e2114 55%, #1a1108 100%)',
-              boxShadow: 'inset 0 0 80px rgba(0,0,0,0.55)',
-            }}
-            aria-hidden
-          />
         )}
         {/* Static right page */}
-        {visibleRight ? (
+        {visibleRight && (
           <div className="absolute right-0 top-0 w-1/2 h-full bg-white overflow-hidden flex items-center justify-center">
             <img src={visibleRight} className={pageImgClass} alt="" draggable={false} />
           </div>
-        ) : (
-          <div
-            className="absolute right-0 top-0 w-1/2 h-full overflow-hidden"
-            style={{
-              background: 'linear-gradient(225deg, #4a3826 0%, #2e2114 55%, #1a1108 100%)',
-              boxShadow: 'inset 0 0 80px rgba(0,0,0,0.55)',
-            }}
-            aria-hidden
-          />
         )}
 
         {/* Flipping overlay — forward (right page rotates left) */}