diff --git a/public/sounds/page-flip.mp3 b/public/sounds/page-flip.mp3
new file mode 100644
index 0000000..b5718bf
Binary files /dev/null and b/public/sounds/page-flip.mp3 differ
diff --git a/src/index.css b/src/index.css
index fd5ef1f..9cca77e 100644
--- a/src/index.css
+++ b/src/index.css
@@ -115,6 +115,24 @@ div.stf__item.page,
   overflow: hidden;
 }
 
+/* موبایل: بدون سایهٔ کادر کتاب تا لبهٔ صفحه هنگام ورق دیده شود؛ overflow و contain کمتر تا بریدگی ۳D نماند */
+@media (max-width: 767px) {
+  .flipbook-container {
+    box-shadow: none;
+    border-radius: 2px;
+    overflow: visible;
+  }
+
+  .flipbook-container .stf__wrapper {
+    overflow: visible !important;
+  }
+
+  .flipbook-container .stf__item {
+    contain: none;
+    overflow: visible !important;
+  }
+}
+
 /* استایل برای صفحات داخل flipbook */
 .flipbook-container .stf__item,
 .flipbook-container .page {
diff --git a/src/pages/viewer/components/BookViewer.tsx b/src/pages/viewer/components/BookViewer.tsx
index 682c67a..2e964e8 100644
--- a/src/pages/viewer/components/BookViewer.tsx
+++ b/src/pages/viewer/components/BookViewer.tsx
@@ -6,6 +6,8 @@ import { ArrowLeft2, ArrowRight2 } from 'iconsax-react';
 import { getPaperDimensions } from '@/config/paperSizes';
 
 const VIEWER_SCALE = 0.5;
+/** نسخهٔ فعلی `page-flip.mp3` دو ضربهٔ ورق پشت‌هم دارد؛ فقط تا این سهم از طول پخش می‌شود */
+const PAGE_FLIP_SOUND_PLAY_FRACTION = 0.5;
 /** هم‌راستا با `md` تیلویند (768px) — موبایل: زیر این عرض */
 const MOBILE_QUERY = '(min-width: 768px)';
 
@@ -79,10 +81,11 @@ const BookViewer: FC<BookViewerProps> = ({ pages, catalogSize }) => {
 
     const mobileFit = useMemo(() => {
         if (isDesktop) return null;
-        const padX = 16;
+        const padX = 20;
+        const edgeBleed = 6;
         const reservedNav = 120;
-        const maxW = Math.max(1, viewport.w - padX);
-        const maxH = Math.max(1, viewport.h - reservedNav);
+        const maxW = Math.max(1, viewport.w - padX - edgeBleed * 2);
+        const maxH = Math.max(1, viewport.h - reservedNav - edgeBleed);
         const baseW = bookWidth * VIEWER_SCALE;
         const baseH = bookHeight * VIEWER_SCALE;
         const scale = Math.min(1, maxW / baseW, maxH / baseH);
@@ -111,6 +114,61 @@ const BookViewer: FC<BookViewerProps> = ({ pages, catalogSize }) => {
         }
     }, [currentPage, pages.length]);
 
+    const pageFlipSoundRef = useRef<HTMLAudioElement | null>(null);
+    const pageFlipSoundTrimListenerRef = useRef<(() => void) | null>(null);
+    const lastFlipPageRef = useRef<number | null>(null);
+
+    useEffect(() => {
+        const base = import.meta.env.BASE_URL;
+        const src = `${base}${base.endsWith('/') ? '' : '/'}sounds/page-flip.mp3`;
+        const audio = new Audio(src);
+        audio.preload = 'auto';
+        pageFlipSoundRef.current = audio;
+        return () => {
+            const trim = pageFlipSoundTrimListenerRef.current;
+            if (trim) {
+                audio.removeEventListener('timeupdate', trim);
+                pageFlipSoundTrimListenerRef.current = null;
+            }
+            audio.pause();
+            pageFlipSoundRef.current = null;
+        };
+    }, []);
+
+    const playPageFlipSound = useCallback(() => {
+        const audio = pageFlipSoundRef.current;
+        if (!audio) return;
+        const prevTrim = pageFlipSoundTrimListenerRef.current;
+        if (prevTrim) {
+            audio.removeEventListener('timeupdate', prevTrim);
+            pageFlipSoundTrimListenerRef.current = null;
+        }
+        const onTimeUpdate = () => {
+            const d = audio.duration;
+            if (!Number.isFinite(d) || d <= 0.04) return;
+            const end = d * PAGE_FLIP_SOUND_PLAY_FRACTION;
+            if (audio.currentTime >= end) {
+                audio.pause();
+                audio.currentTime = 0;
+                audio.removeEventListener('timeupdate', onTimeUpdate);
+                pageFlipSoundTrimListenerRef.current = null;
+            }
+        };
+        pageFlipSoundTrimListenerRef.current = onTimeUpdate;
+        try {
+            audio.currentTime = 0;
+            audio.addEventListener('timeupdate', onTimeUpdate);
+            void audio.play().catch(() => {
+                audio.removeEventListener('timeupdate', onTimeUpdate);
+                pageFlipSoundTrimListenerRef.current = null;
+                /* autoplay policy — معمولاً بعد از تعامل کاربر ورق می‌خورد */
+            });
+        } catch {
+            audio.removeEventListener('timeupdate', onTimeUpdate);
+            pageFlipSoundTrimListenerRef.current = null;
+        }
+    }, []);
+
     const handlePageFlip = useCallback((e: FlipEvent) => {
         // react-pageflip شماره صفحه را به صورت 0-based برمی‌گرداند
         // اما باید مطمئن شویم که در محدوده معتبر است
@@ -123,8 +181,13 @@ const BookViewer: FC<BookViewerProps> = ({ pages, catalogSize }) => {
             pageNum = pages.length - 1;
         }
 
+        if (lastFlipPageRef.current !== null && lastFlipPageRef.current !== pageNum) {
+            playPageFlipSound();
+        }
+        lastFlipPageRef.current = pageNum;
+
         setCurrentPage(pageNum);
-    }, [pages.length]);
+    }, [pages.length, playPageFlipSound]);
 
     const goToNextPage = useCallback(() => {
         if (currentPage < pages.length - 1) {
@@ -215,6 +278,14 @@ const BookViewer: FC<BookViewerProps> = ({ pages, catalogSize }) => {
 
     const usePortrait = !isDesktop;
 
+    const prevFlipKeyRef = useRef(flipKey);
+    useEffect(() => {
+        if (prevFlipKeyRef.current !== flipKey) {
+            prevFlipKeyRef.current = flipKey;
+            lastFlipPageRef.current = currentPage;
+        }
+    }, [flipKey, currentPage]);
+
     return (
         <div
             className="flex flex-col items-center gap-4 md:gap-6 w-full h-full max-md:min-h-0 max-md:max-w-full max-md:overflow-x-hidden max-md:pb-[env(safe-area-inset-bottom,0px)]"
@@ -222,7 +293,7 @@ const BookViewer: FC<BookViewerProps> = ({ pages, catalogSize }) => {
         >
             <div
                 className="relative w-full flex justify-center flex-1 max-md:min-h-0 items-center"
-                style={{ overflow: 'hidden' }}
+                style={{ overflow: isDesktop ? 'hidden' : 'visible' }}
             >
                 {/* Border و Shadow عمودی در وسط (فقط دوسوّره/دسکتاپ) */}
                 <div
@@ -233,7 +304,7 @@ const BookViewer: FC<BookViewerProps> = ({ pages, catalogSize }) => {
                 />
                 <div
                     className="max-w-full flex justify-center"
-                    style={{ overflow: 'hidden', isolation: 'isolate' }}
+                    style={{ overflow: isDesktop ? 'hidden' : 'visible', isolation: 'isolate' }}
                 >
                     <HTMLFlipBook
                         key={flipKey}
@@ -245,12 +316,12 @@ const BookViewer: FC<BookViewerProps> = ({ pages, catalogSize }) => {
                         minHeight={pagePixelHeight}
                         maxWidth={pagePixelWidth}
                         maxHeight={pagePixelHeight}
-                        drawShadow={true}
+                        drawShadow={isDesktop}
                         flippingTime={800}
                         usePortrait={usePortrait}
                         startPage={currentPage}
                         autoSize={false}
-                        maxShadowOpacity={0.5}
+                        maxShadowOpacity={isDesktop ? 0.5 : 0}
                         showCover={true}
                         mobileScrollSupport={!usePortrait}
                         clickEventForward={true}