diff --git a/src/App.module.css b/src/App.module.css
index ce4b11a..d7c97be 100644
--- a/src/App.module.css
+++ b/src/App.module.css
@@ -1,4 +1,4 @@
-.appContainer {
+.appWrapper {
   height: 100vh;
   width: 100%;
   overflow: hidden;
@@ -20,24 +20,24 @@
     display: flex;
   }
 
-  .alphaZone {
+  .firstZone {
     flex: 1;
   }
 
-  .betaZone {
+  .secondZone {
     flex: 1;
   }
 
-  .colorPickerContainer {
+  .colorPickerWrapper {
   }
 
-  .colorValuesContainer {
+  .colorValuesWrapper {
   }
 
-  .paletteEditorContainer {
+  .paletteEditorWrapper {
   }
 
-  .paletteLibraryContainer {
+  .paletteLibraryWrapper {
   }
 }
 
@@ -61,35 +61,35 @@
   .mobileRightNav {
   }
 
-  .mobileAlphaZone {
+  .mobileFirstZone {
     flex: 1;
   }
 
-  .mobileBetaZone {
+  .mobileSecondZone {
     flex: 1;
   }
 
-  .tabbedContainer {
+  .tabWrapper {
     max-height: 100vh;
     overflow-y: scroll;
     scroll-snap-type: y mandatory;
   }
 
-  .tabbedContainer .tab {
+  .tabWrapper .tab {
     height: 100vh;
     scroll-snap-align: start;
   }
 
-  .colorPickerContainer {
+  .colorPickerWrapper {
   }
 
-  .colorValuesContainer {
+  .colorValuesWrapper {
   }
 
-  .paletteEditorContainer {
+  .paletteEditorWrapper {
   }
 
-  .paletteLibraryContainer {
+  .paletteLibraryWrapper {
   }
 }
 
@@ -119,32 +119,32 @@
     margin-left: auto;
   }
 
-  .mobileAlphaZone {
+  .mobileFirstZone {
   }
 
-  .mobileBetaZone {
+  .mobileSecondZone {
   }
 
-  .tabbedContainer {
+  .tabWrapper {
     display: flex;
     overflow-x: scroll;
     scroll-snap-type: x mandatory;
   }
 
-  .tabbedContainer .tab {
+  .tabWrapper .tab {
     min-width: 100vw;
     scroll-snap-align: start;
   }
 
-  .colorPickerContainer {
+  .colorPickerWrapper {
   }
 
-  .colorValuesContainer {
+  .colorValuesWrapper {
   }
 
-  .paletteEditorContainer {
+  .paletteEditorWrapper {
   }
 
-  .paletteLibraryContainer {
+  .paletteLibraryWrapper {
   }
 }
diff --git a/src/App.tsx b/src/App.tsx
index f8df026..dc38dae 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -5,86 +5,224 @@ import ColorValues from "./components/ColorValues/ColorValues";
 import { LeftMenu, RightMenu } from "./components/SideMenu";
 import clsx from "clsx";
 
+// Menu Button Components
+
+interface MenuButtonProps {
+  onClick: () => void;
+  isOpen: boolean;
+}
+
+function LeftMenuButton({ onClick, isOpen }: MenuButtonProps) {
+  return (
+    <button
+      className={styles.leftMenuButton}
+      onClick={onClick}
+      aria-label="Open left menu"
+      aria-haspopup="dialog"
+      aria-expanded={isOpen}
+    >
+      ☰
+    </button>
+  );
+}
+
+function RightMenuButton({ onClick, isOpen }: MenuButtonProps) {
+  return (
+    <button
+      className={styles.rightMenuButton}
+      onClick={onClick}
+      aria-label="Open right menu"
+      aria-haspopup="dialog"
+      aria-expanded={isOpen}
+    >
+      ☰
+    </button>
+  );
+}
+
+// Mobile Layout Components
+
+interface MenuStateProps {
+  isRightMenuOpen: boolean;
+  isLeftMenuOpen: boolean;
+  setIsRightMenuOpen: (state: boolean) => void;
+  setIsLeftMenuOpen: (state: boolean) => void;
+}
+
+function MobileTopNav({
+  onLeftMenuClick,
+  onRightMenuClick,
+  isRightMenuOpen,
+  isLeftMenuOpen,
+}: {
+  onLeftMenuClick: () => void;
+  onRightMenuClick: () => void;
+  isRightMenuOpen: boolean;
+  isLeftMenuOpen: boolean;
+}) {
+  return (
+    <nav className={styles.mobileTopNav} aria-label="Mobile top navigation">
+      <LeftMenuButton onClick={onLeftMenuClick} isOpen={isLeftMenuOpen} />
+      <RightMenuButton onClick={onRightMenuClick} isOpen={isRightMenuOpen} />
+    </nav>
+  );
+}
+
+function MobileLeftNav({ onClick, isOpen }: MenuButtonProps) {
+  return (
+    <nav className={styles.mobileLeftNav} aria-label="Mobile left navigation">
+      <LeftMenuButton onClick={onClick} isOpen={isOpen} />
+    </nav>
+  );
+}
+
+function MobileRightNav({ onClick, isOpen }: MenuButtonProps) {
+  return (
+    <nav className={styles.mobileRightNav} aria-label="Mobile right navigation">
+      <RightMenuButton onClick={onClick} isOpen={isOpen} />
+    </nav>
+  );
+}
+
+function MobileFirstZone() {
+  return (
+    <section className={styles.mobileFirstZone} aria-label="Color tools">
+      <div className={styles.tabWrapper} role="tablist">
+        <div
+          className={clsx(styles.tab, styles.colorPickerWrapper)}
+          role="tabpanel"
+          aria-label="Color Picker"
+        >
+          <ColorPicker />
+        </div>
+        <div
+          className={clsx(styles.tab, styles.colorValuesWrapper)}
+          role="tabpanel"
+          aria-label="Color values"
+        >
+          <ColorValues />
+        </div>
+      </div>
+    </section>
+  );
+}
+
+function MobileSecondZone() {
+  return (
+    <section className={styles.mobileSecondZone} aria-label="Palette tools">
+      <div
+        className={styles.paletteEditorWrapper}
+        aria-label="Palette editor"
+      ></div>
+    </section>
+  );
+}
+
+function MobileContent({
+  isLeftMenuOpen,
+  setIsLeftMenuOpen,
+  isRightMenuOpen,
+  setIsRightMenuOpen,
+}: MenuStateProps) {
+  const toggleRightMenu = () => setIsRightMenuOpen(!isRightMenuOpen);
+  const toggleLeftMenu = () => setIsLeftMenuOpen(!isLeftMenuOpen);
+
+  return (
+    <main className={styles.mobileContent}>
+      <MobileTopNav
+        onLeftMenuClick={toggleLeftMenu}
+        onRightMenuClick={toggleRightMenu}
+        isLeftMenuOpen={isLeftMenuOpen}
+        isRightMenuOpen={isRightMenuOpen}
+      />
+
+      <MobileLeftNav onClick={toggleLeftMenu} isOpen={isLeftMenuOpen} />
+
+      <MobileFirstZone />
+      <MobileSecondZone />
+
+      <MobileRightNav onClick={toggleRightMenu} isOpen={isRightMenuOpen} />
+
+      <LeftMenu
+        isOpen={isLeftMenuOpen}
+        onClose={() => setIsLeftMenuOpen(false)}
+      >
+        <div id="user-info" aria-label="User information">
+          User Info
+        </div>
+      </LeftMenu>
+
+      <RightMenu
+        isOpen={isRightMenuOpen}
+        onClose={() => setIsRightMenuOpen(false)}
+      >
+        <div
+          id="palette-library"
+          className={styles.paletteLibraryWrapper}
+          aria-label="Palette library"
+        >
+          Palette Library
+        </div>
+      </RightMenu>
+    </main>
+  );
+}
+
+// Desktop Layout Components
+
+function FirstZone() {
+  return (
+    <section className={styles.firstZone} aria-label="Color tools">
+      <div className={styles.colorPickerWrapper} aria-label="Color picker">
+        <ColorPicker />
+      </div>
+
+      <div className={styles.colorValuesWrapper} aria-label="Color values">
+        <ColorValues />
+      </div>
+    </section>
+  );
+}
+
+function SecondZone() {
+  return (
+    <section className={styles.secondZone} aria-label="Palette tools">
+      <div
+        className={styles.paletteEditorWrapper}
+        aria-label="Palette editor"
+      ></div>
+      <div
+        className={styles.paletteLibraryWrapper}
+        aria-label="Palette library"
+      ></div>
+    </section>
+  );
+}
+
+function DesktopContent() {
+  return (
+    <main className={styles.mainContent}>
+      <FirstZone />
+      <SecondZone />
+    </main>
+  );
+}
+
+// Main App Component
+
 function App() {
   const [isRightMenuOpen, setIsRightMenuOpen] = useState(false);
   const [isLeftMenuOpen, setIsLeftMenuOpen] = useState(false);
 
-  const toggleRightMenu = () => setIsRightMenuOpen(!isRightMenuOpen);
-  const toggleLeftMenu = () => setIsLeftMenuOpen(!isLeftMenuOpen);
-
-  const RightMenuButton = () => (
-    <button className={styles.rightMenuButton} onClick={toggleRightMenu}>
-      ☰
-    </button>
-  );
-  const LeftMenuButton = () => (
-    <button className={styles.leftMenuButton} onClick={toggleLeftMenu}>
-      ☰
-    </button>
-  );
-
   return (
-    <div className={styles.appContainer}>
-      <div className={styles.mobileContent}>
-        <div className={styles.mobileTopNav}>
-          <LeftMenuButton />
-          <RightMenuButton />
-        </div>
-
-        <div className={styles.mobileLeftNav}>
-          <LeftMenuButton />
-        </div>
-
-        <div className={styles.mobileAlphaZone}>
-          <div className={styles.tabbedContainer}>
-            <div className={clsx(styles.tab, styles.colorPickerContainer)}>
-              <ColorPicker />
-            </div>
-            <div className={clsx(styles.tab, styles.colorValuesContainer)}>
-              <ColorValues />
-            </div>
-          </div>
-        </div>
-
-        <div className={styles.mobileBetaZone}>
-          <div className={styles.paletteEditorContainer}></div>
-        </div>
-
-        <div className={styles.mobileRightNav}>
-          <RightMenuButton />
-        </div>
-
-        <LeftMenu
-          isOpen={isLeftMenuOpen}
-          onClose={() => setIsLeftMenuOpen(false)}
-        >
-          <div>User Info</div>
-        </LeftMenu>
-
-        <RightMenu
-          isOpen={isRightMenuOpen}
-          onClose={() => setIsRightMenuOpen(false)}
-        >
-          <div className={styles.paletteLibraryContainer}>Palette Library</div>
-        </RightMenu>
-      </div>
-
-      <div className={styles.mainContent}>
-        <div className={styles.alphaZone}>
-          <div className={styles.colorPickerContainer}>
-            <ColorPicker />
-          </div>
-
-          <div className={styles.colorValuesContainer}>
-            <ColorValues />
-          </div>
-        </div>
-
-        <div className={styles.betaZone}>
-          <div className={styles.paletteEditorContainer}></div>
-          <div className={styles.paletteLibraryContainer}></div>
-        </div>
-      </div>
+    <div className={styles.appWrapper} role="application">
+      <MobileContent
+        isLeftMenuOpen={isLeftMenuOpen}
+        setIsLeftMenuOpen={setIsLeftMenuOpen}
+        isRightMenuOpen={isRightMenuOpen}
+        setIsRightMenuOpen={setIsRightMenuOpen}
+      />
+      <DesktopContent />
     </div>
   );
 }
diff --git a/src/components/SideMenu/SideMenu.module.css b/src/components/SideMenu/SideMenu.module.css
index bb0cb1d..952c849 100644
--- a/src/components/SideMenu/SideMenu.module.css
+++ b/src/components/SideMenu/SideMenu.module.css
@@ -9,6 +9,14 @@
   transition: 0.3s ease-out;
 }
 
+.sideMenu:not(.open) {
+  visibility: hidden;
+}
+
+.sideMenu.open {
+  visibility: visible;
+}
+
 .sideMenuUnderlay {
   position: fixed;
   top: 0;
diff --git a/src/components/SideMenu/SideMenu.tsx b/src/components/SideMenu/SideMenu.tsx
index 7b0802d..d9971c4 100644
--- a/src/components/SideMenu/SideMenu.tsx
+++ b/src/components/SideMenu/SideMenu.tsx
@@ -14,6 +14,7 @@ interface BaseMenuProps extends SideMenuProps {
 
 function BaseMenu({ isOpen, onClose, children, position }: BaseMenuProps) {
   const isLeftMenu = position === "left";
+  const menuId = `${position}-side-menu`;
 
   const handleUnderlayClick = (e: React.MouseEvent<HTMLDivElement>) => {
     if (e.target === e.currentTarget) {
@@ -25,8 +26,13 @@ function BaseMenu({ isOpen, onClose, children, position }: BaseMenuProps) {
     <div
       className={clsx(styles.sideMenuUnderlay, { [styles.open]: isOpen })}
       onClick={handleUnderlayClick}
+      aria-hidden={!isOpen}
     >
       <div
+        id={menuId}
+        role="dialog"
+        aria-modal="true"
+        aria-label={`${position} side menu`}
         data-cy={`${position}-menu`}
         className={clsx(
           styles.sideMenu,
@@ -43,6 +49,7 @@ function BaseMenu({ isOpen, onClose, children, position }: BaseMenuProps) {
         >
           <div className={styles.topNav}>
             <button
+              aria-label="Close menu"
               data-cy="close-menu"
               className={styles.closeButton}
               onClick={onClose}