diff --git a/App.tsx b/App.tsx
index 3f4ab6f..b8cbc43 100644
--- a/App.tsx
+++ b/App.tsx
@@ -32,6 +32,13 @@ const App: React.FC = () => {
   const [capturedByWhite, setCapturedByWhite] = useState<Piece[]>([]); // Pieces Black lost to White
   const [capturedByBlack, setCapturedByBlack] = useState<Piece[]>([]); // Pieces White lost to Black
 
+  // Mobile Overlay State
+  const [isInfoOverlayVisible, setIsInfoOverlayVisible] = useState(false);
+
+  const toggleInfoOverlay = useCallback(() => {
+    setIsInfoOverlayVisible(prev => !prev);
+  }, []);
+
   // Helper function to get legal moves (filters out moves that leave king in check)
   const getLegalMoves = useCallback((
     currentBoard: BoardState,
@@ -293,13 +300,24 @@ const App: React.FC = () => {
 
   return (
     <AppLayout
+      isInfoOverlayVisible={isInfoOverlayVisible}
+      toggleInfoOverlay={toggleInfoOverlay}
+      moveHistory={moveHistory}
+      gameStatusMessage={message}
+      onResetGame={resetGame}
+      isCheckmate={isCheckmate}
+      isStalemate={isStalemate}
+      isCheck={isCheck}
+      capturedByWhiteData={capturedByWhite}
+      capturedByBlackData={capturedByBlack}
       headerContent={
         <>
           <h1 className="text-5xl md:text-6xl font-extrabold bg-gradient-to-r from-sky-400 via-blue-500 to-indigo-600 bg-clip-text text-transparent tracking-tight drop-shadow-lg">
             React Chess
           </h1>
           <div className="mt-3 md:mt-4">
-            <div className={`inline-flex items-center px-4 py-2 rounded-full text-sm md:text-base font-medium shadow-lg backdrop-blur-sm border transition-all duration-300 ${
+            {/* This status message display is now only for desktop (lg screens) */}
+            <div className={`hidden lg:inline-flex items-center px-4 py-2 rounded-full text-sm md:text-base font-medium shadow-lg backdrop-blur-sm border transition-all duration-300 ${
               isCheckmate
                 ? 'bg-emerald-500/20 text-emerald-300 border-emerald-500/40 shadow-emerald-500/20'
                 : isStalemate
@@ -335,7 +353,7 @@ const App: React.FC = () => {
         </>
       }
       mainContent={
-        <div className="p-4 bg-gradient-to-br from-slate-800/50 to-slate-700/50 backdrop-blur-sm rounded-2xl shadow-2xl border border-slate-600/50">
+        <div className="p-1 sm:p-2 md:p-4 bg-gradient-to-br from-slate-800/50 to-slate-700/50 backdrop-blur-sm rounded-2xl shadow-2xl border border-slate-600/50">
           <BoardComponent
             board={board}
             selectedSquare={selectedSquare}
diff --git a/components/AppLayout.tsx b/components/AppLayout.tsx
index ae374bb..e13e312 100644
--- a/components/AppLayout.tsx
+++ b/components/AppLayout.tsx
@@ -1,10 +1,25 @@
 import React from 'react';
+import { MobileInfoOverlay } from './MobileInfoOverlay'; // Import MobileInfoOverlay
+import { CapturedPiecesDisplay } from './CapturedPiecesDisplay'; // Import CapturedPiecesDisplay
+import { Piece } from '../types'; // Assuming Piece type might be needed for new props
 
 export interface AppLayoutProps {
   headerContent: React.ReactNode;
-  leftSidebarContent: React.ReactNode;
+  leftSidebarContent: React.ReactNode; // For desktop
   mainContent: React.ReactNode;
-  rightSidebarContent: React.ReactNode;
+  rightSidebarContent: React.ReactNode; // For desktop
+  // Props for MobileInfoOverlay
+  isInfoOverlayVisible: boolean;
+  toggleInfoOverlay: () => void;
+  moveHistory: string[];
+  gameStatusMessage: string;
+  onResetGame: () => void;
+  isCheckmate: boolean;
+  isStalemate: boolean;
+  isCheck: boolean;
+  // Props for mobile captured pieces
+  capturedByWhiteData: Piece[];
+  capturedByBlackData: Piece[];
 }
 
 export const AppLayout: React.FC<AppLayoutProps> = ({
@@ -12,6 +27,16 @@ export const AppLayout: React.FC<AppLayoutProps> = ({
   leftSidebarContent,
   mainContent,
   rightSidebarContent,
+  isInfoOverlayVisible,
+  toggleInfoOverlay,
+  moveHistory,
+  gameStatusMessage,
+  onResetGame,
+  isCheckmate,
+  isStalemate,
+  isCheck,
+  capturedByWhiteData,
+  capturedByBlackData,
 }) => {
   return (
     <div className={`
@@ -28,44 +53,87 @@ export const AppLayout: React.FC<AppLayoutProps> = ({
         <div className="absolute -bottom-40 -left-40 w-80 h-80 bg-purple-500/10 rounded-full blur-3xl"></div>
       </div>
 
-      <header className="mb-6 md:mb-8 text-center relative z-10">
-        {headerContent}
+      <header className="w-full max-w-sm sm:max-w-md md:max-w-xl lg:max-w-6xl xl:max-w-7xl mb-6 md:mb-8 text-center relative z-10 flex items-center justify-between px-1">
+        {/* Mobile Info Toggle Button - aligned to the left or start */}
+        <button
+          onClick={toggleInfoOverlay}
+          className="p-2 rounded-md bg-slate-700/80 hover:bg-slate-600/80 text-white lg:hidden shadow-md"
+          aria-label="Toggle game info panel"
+        >
+          <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
+          </svg>
+        </button>
+
+        {/* Header Content (Title and Desktop Status) - takes remaining space and centers its content */}
+        <div className="flex-grow">
+          {headerContent}
+        </div>
+
+        {/* Spacer to balance the mobile button, hidden on lg screens */}
+        <div className="w-9 h-9 lg:hidden" aria-hidden="true"></div>
       </header>
 
       <div className={`
         flex flex-col lg:flex-row
-        gap-6 items-start
+        gap-2 sm:gap-4 lg:gap-6 items-start
         w-full
         max-w-sm sm:max-w-md md:max-w-xl lg:max-w-6xl xl:max-w-7xl
         relative z-10
       `}>
-        {/* Left Side */}
-        <div className={`
-          w-full lg:w-64
-          order-2 lg:order-1
-          flex-shrink-0 space-y-4
-        `}>
-          {leftSidebarContent}
+        {/* Mobile: Captured Black Pieces (Top) - order-1 ensures it's first in flex-col */}
+        <div className="w-full order-1 lg:hidden">
+          <CapturedPiecesDisplay pieces={capturedByBlackData} title="Black's Captures" />
         </div>
 
-        {/* Center - Chess Board */}
+        {/* Main Content (Board) - Order changes for mobile vs desktop */}
+        {/* On mobile, order-2. On desktop, it's part of lg:flex-row, effectively order-2 by source order among visible lg items */}
         <div className={`
           flex-grow flex justify-center
-          order-1 lg:order-2
+          order-2
           w-full lg:w-auto
         `}>
-          {mainContent}
+          {mainContent} {/* This is the BoardComponent */}
+        </div>
+
+        {/* Mobile: Captured White Pieces (Bottom) - order-3 ensures it's last in flex-col before desktop sidebars */}
+        <div className="w-full order-3 lg:hidden">
+          <CapturedPiecesDisplay pieces={capturedByWhiteData} title="White's Captures" />
+        </div>
+
+        {/* Desktop Left Sidebar (contains both captured displays from App.tsx) */}
+        {/* order-1 for lg screens, hidden on smaller screens */}
+        <div className={`
+          w-full lg:w-64
+          order-1
+          hidden lg:flex lg:flex-col lg:flex-shrink-0 lg:space-y-4
+        `}>
+          {leftSidebarContent}
         </div>
 
-        {/* Right Side */}
+        {/* Desktop Right Sidebar (Game Info, Moves, Reset from App.tsx) */}
+        {/* order-3 for lg screens, hidden on smaller screens */}
         <div className={`
           w-full lg:w-64
-          order-3 lg:order-3
-          flex-shrink-0 space-y-6
+          order-3
+          hidden lg:flex lg:flex-col lg:flex-shrink-0 lg:space-y-6
         `}>
           {rightSidebarContent}
         </div>
       </div>
+
+      {isInfoOverlayVisible && (
+        <MobileInfoOverlay
+          isOpen={isInfoOverlayVisible}
+          onClose={toggleInfoOverlay}
+          moveHistory={moveHistory}
+          gameStatusMessage={gameStatusMessage}
+          onResetGame={onResetGame}
+          isCheckmate={isCheckmate}
+          isStalemate={isStalemate}
+          isCheck={isCheck}
+        />
+      )}
     </div>
   );
 };
diff --git a/components/CapturedPiecesDisplay.tsx b/components/CapturedPiecesDisplay.tsx
index f3df579..c3dfe4e 100644
--- a/components/CapturedPiecesDisplay.tsx
+++ b/components/CapturedPiecesDisplay.tsx
@@ -9,31 +9,31 @@ export interface CapturedPiecesDisplayProps {
 
 export const CapturedPiecesDisplay: React.FC<CapturedPiecesDisplayProps> = ({ pieces, title }) => (
   <div className={`
-    p-4
+    p-1 sm:p-2 md:p-4
     bg-gradient-to-br from-slate-800/80 to-slate-700/80
     backdrop-blur-sm rounded-xl shadow-xl
     border border-slate-600/50
     w-full
   `}>
     <h3 className={`
-      text-md font-bold
+      text-xs sm:text-sm md:text-md font-bold
       text-transparent bg-gradient-to-r from-sky-400 to-blue-500 bg-clip-text
-      mb-3 border-b border-slate-600/50 pb-2
+      mb-1 sm:mb-2 md:mb-3 border-b border-slate-600/50 pb-1 sm:pb-1 md:pb-2
     `}>
       {title}
     </h3>
     <div className={`
       flex flex-wrap
-      gap-x-2 gap-y-1
-      min-h-[3rem] items-center
+      gap-x-1 gap-y-0.5 sm:gap-x-2 sm:gap-y-1
+      min-h-[2rem] sm:min-h-[2.5rem] md:min-h-[3rem] items-center
     `}>
       {pieces.length === 0 && (
-        <span className="text-sm text-slate-400 italic">No pieces captured</span>
+        <span className="text-xs sm:text-sm text-slate-400 italic">No pieces captured</span>
       )}
       {pieces.map((p, i) => (
         <div
           key={`${p.type}-${p.color}-${i}`}
-          className="text-3xl drop-shadow-lg hover:scale-110 transition-transform duration-200"
+          className="text-lg sm:text-xl md:text-2xl lg:text-3xl drop-shadow-lg hover:scale-110 transition-transform duration-200"
           title={`${p.color} ${p.type}`}
         >
           {/* This usage expects PIECE_UNICODE to be { [color]: { [type]: char } } */}
diff --git a/components/MobileInfoOverlay.tsx b/components/MobileInfoOverlay.tsx
new file mode 100644
index 0000000..14d5aed
--- /dev/null
+++ b/components/MobileInfoOverlay.tsx
@@ -0,0 +1,103 @@
+import React from 'react';
+import NotationDisplay from './NotationDisplay'; // Assuming NotationDisplay is in the same components folder
+
+interface MobileInfoOverlayProps {
+  isOpen: boolean;
+  onClose: () => void;
+  moveHistory: string[];
+  gameStatusMessage: string;
+  onResetGame: () => void;
+  isCheckmate: boolean; // Added to determine button text
+  isStalemate: boolean; // Added to determine button text
+  isCheck: boolean; // Added for status message styling
+}
+
+export const MobileInfoOverlay: React.FC<MobileInfoOverlayProps> = ({
+  isOpen,
+  onClose,
+  moveHistory,
+  gameStatusMessage,
+  onResetGame,
+  isCheckmate,
+  isStalemate,
+  isCheck,
+}) => {
+  if (!isOpen) {
+    return null;
+  }
+
+  // Determine status message styling based on game state
+  // Similar to App.tsx, but adapted for the overlay
+  let statusMessageClasses = 'px-3 py-2 rounded-md text-sm font-medium text-center ';
+  if (isCheckmate) {
+    statusMessageClasses += 'bg-emerald-500/20 text-emerald-300 border border-emerald-500/40';
+  } else if (isStalemate) {
+    statusMessageClasses += 'bg-yellow-500/20 text-yellow-300 border border-yellow-500/40';
+  } else if (isCheck) {
+    statusMessageClasses += 'bg-red-500/20 text-red-300 border border-red-500/40 animate-pulse';
+  } else {
+    statusMessageClasses += 'bg-slate-700/60 text-slate-300 border border-slate-600/40';
+  }
+
+
+  return (
+    <div
+      className="fixed inset-0 z-40 bg-slate-900/70 backdrop-blur-sm lg:hidden"
+      onClick={onClose} // Close when clicking backdrop
+      role="dialog"
+      aria-modal="true"
+    >
+      <div
+        className="fixed inset-x-4 bottom-4 top-16 z-50 flex flex-col gap-4 p-4 bg-slate-800 rounded-lg shadow-xl lg:hidden overflow-y-auto scrollbar-thin scrollbar-thumb-slate-600 scrollbar-track-slate-700"
+        onClick={(e) => e.stopPropagation()} // Prevent closing when clicking inside panel
+      >
+        {/* Close Button */}
+        <button
+          onClick={onClose}
+          className="absolute top-2 right-2 p-2 text-slate-400 hover:text-slate-200 transition-colors"
+          aria-label="Close info panel"
+        >
+          <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+          </svg>
+        </button>
+
+        {/* Game Status Message */}
+        <div className={statusMessageClasses}>
+          {gameStatusMessage}
+        </div>
+
+        {/* Move History */}
+        <div className="flex-grow flex flex-col min-h-0"> {/* Ensure NotationDisplay can shrink and scroll */}
+          <NotationDisplay moveHistory={moveHistory} />
+        </div>
+
+        {/* Reset Game Button */}
+        <button
+          type="button"
+          onClick={() => {
+            onResetGame();
+            onClose(); // Close overlay after resetting
+          }}
+          className={`
+            w-full px-6 py-3 mt-auto
+            bg-gradient-to-r from-sky-600 to-blue-600
+            hover:from-sky-500 hover:to-blue-500
+            text-white font-bold text-base rounded-xl
+            shadow-xl transform transition-all duration-200
+            hover:scale-105 hover:shadow-2xl
+            focus:outline-none focus:ring-4 focus:ring-sky-500 focus:ring-opacity-50
+            active:scale-95
+          `}
+        >
+          <span className="flex items-center justify-center gap-2">
+            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
+            </svg>
+            {isCheckmate || isStalemate ? 'Play Again' : 'Reset Game'}
+          </span>
+        </button>
+      </div>
+    </div>
+  );
+};