diff --git a/src/index.html b/src/index.html
index c5224da..f4741d1 100644
--- a/src/index.html
+++ b/src/index.html
@@ -109,14 +109,20 @@
         <span id="volume-value">50%</span>
       </section>
 
-      <!-- Hidden Cast Overlay -->
-      <div id="cast-overlay" class="overlay hidden">
-        <div class="overlay-content">
-          <h3>Connect to Device</h3>
-          <ul id="device-list">
-            <li>Searching...</li>
+      <!-- Hidden Cast Overlay (Beautified) -->
+      <div id="cast-overlay" class="overlay hidden" aria-hidden="true" data-tauri-drag-region>
+        <div class="modal" role="dialog" aria-modal="true" aria-labelledby="deviceTitle">
+          <h2 id="deviceTitle">Connect to Device</h2>
+
+          <ul id="device-list" class="device-list">
+            <!-- Render device items here -->
+            <li class="device">
+              <div class="device-main">Scanning...</div>
+              <div class="device-sub">Searching for speakers</div>
+            </li>
           </ul>
-          <button id="close-overlay">Cancel</button>
+
+          <button id="close-overlay" class="btn cancel" type="button">Cancel</button>
         </div>
       </div>
 
diff --git a/src/main.js b/src/main.js
index 9bb31d6..aacc707 100644
--- a/src/main.js
+++ b/src/main.js
@@ -58,6 +58,11 @@ function setupEventListeners() {
   castBtn.addEventListener('click', openCastOverlay);
   closeOverlayBtn.addEventListener('click', closeCastOverlay);
 
+  // Close overlay on background click
+  castOverlay.addEventListener('click', (e) => {
+    if (e.target === castOverlay) closeCastOverlay();
+  });
+
   // Close button
   document.getElementById('close-btn').addEventListener('click', async () => {
     const appWindow = getCurrentWindow();
@@ -213,37 +218,37 @@ function handleVolumeInput() {
 // Cast Logic
 async function openCastOverlay() {
   castOverlay.classList.remove('hidden');
-  deviceListEl.innerHTML = '<li>Scanning...</li>';
+  castOverlay.setAttribute('aria-hidden', 'false');
+  deviceListEl.innerHTML = '<li class="device"><div class="device-main">Scanning...</div><div class="device-sub">Searching for speakers</div></li>';
 
   try {
     const devices = await invoke('list_cast_devices');
     deviceListEl.innerHTML = '';
 
-    // Add "Stop Casting / Local" option
+    // Add "This Computer" option
     const localLi = document.createElement('li');
-    localLi.textContent = 'This Computer (Local Playback)';
+    localLi.className = 'device' + (currentMode === 'local' ? ' selected' : '');
+    localLi.innerHTML = '<div class="device-main">This Computer</div><div class="device-sub">Local Playback</div>';
     localLi.onclick = () => selectCastDevice(null);
     deviceListEl.appendChild(localLi);
 
-    if (devices.length === 0) {
-      const li = document.createElement('li');
-      li.textContent = 'No speakers found';
-      deviceListEl.appendChild(li);
-    } else {
+    if (devices.length > 0) {
       devices.forEach(d => {
         const li = document.createElement('li');
-        li.textContent = d;
+        li.className = 'device' + (currentMode === 'cast' && currentCastDevice === d ? ' selected' : '');
+        li.innerHTML = `<div class="device-main">${d}</div><div class="device-sub">Google Cast Speaker</div>`;
         li.onclick = () => selectCastDevice(d);
         deviceListEl.appendChild(li);
       });
     }
   } catch (e) {
-    deviceListEl.innerHTML = `<li>Error: ${e}</li>`;
+    deviceListEl.innerHTML = `<li class="device"><div class="device-main">Error</div><div class="device-sub">${e}</div></li>`;
   }
 }
 
 function closeCastOverlay() {
   castOverlay.classList.add('hidden');
+  castOverlay.setAttribute('aria-hidden', 'true');
 }
 
 async function selectCastDevice(deviceName) {
diff --git a/src/styles.css b/src/styles.css
index 24fe013..ef8bde6 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -408,20 +408,16 @@ input[type=range]::-webkit-slider-thumb {
     height: 24px;
 }
 
-/* Cast Overlay */
+/* Cast Overlay (Beautified as per layout2_plan.md) */
 .overlay {
-    position: absolute;
-    top: 0;
-    left: 0;
-    width: 100%;
-    height: 100%;
-    background: rgba(0,0,0,0.6);
-    backdrop-filter: blur(10px);
-    z-index: 10;
+    position: fixed;
+    inset: 0;
+    background: rgba(20, 10, 35, 0.45);
+    backdrop-filter: blur(14px);
     display: flex;
-    justify-content: center;
     align-items: center;
-    border-radius: var(--card-radius);
+    justify-content: center;
+    z-index: 1000;
     opacity: 0;
     pointer-events: none;
     transition: opacity 0.3s;
@@ -432,48 +428,99 @@ input[type=range]::-webkit-slider-thumb {
     pointer-events: auto;
 }
 
-.overlay-content {
-    background: #2a2a2a;
-    padding: 24px;
-    border-radius: 16px;
-    width: 80%;
-    max-height: 70%;
-    display: flex;
-    flex-direction: column;
-    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
+/* Modal */
+.modal {
+    width: min(420px, calc(100vw - 48px));
+    padding: 22px;
+    border-radius: 22px;
+    background: rgba(30, 30, 40, 0.82);
+    border: 1px solid rgba(255,255,255,0.12);
+    box-shadow: 0 30px 80px rgba(0,0,0,0.6);
+    color: #fff;
+    animation: pop 0.22s ease;
+    -webkit-app-region: no-drag;
+}
+
+@keyframes pop {
+    from { transform: scale(0.94); opacity: 0; }
+    to   { transform: scale(1); opacity: 1; }
+}
+
+.modal h2 {
+    margin: 0 0 14px;
+    text-align: center;
+    font-size: 20px;
+}
+
+/* Device list */
+.device-list {
+    list-style: none;
+    padding: 10px 5px;
+    margin: 0 0 18px;
+    max-height: 360px;
+    overflow-y: auto;
+}
+
+/* Device row */
+.device {
+    padding: 12px 14px;
+    border-radius: 14px;
+    margin-bottom: 8px;
+    cursor: pointer;
+    background: rgba(255,255,255,0.05);
+    transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
+    text-align: left;
+}
+
+.device:hover {
+    background: rgba(255,255,255,0.10);
+    transform: translateY(-1px);
+}
+
+.device .device-main {
+    font-size: 15px;
+    font-weight: 600;
     color: var(--text-main);
 }
 
-.overlay-content h3 {
-    margin-top: 0;
-    font-size: 1.1rem;
-    text-align: center;
+.device .device-sub {
+    margin-top: 3px;
+    font-size: 12px;
+    opacity: 0.7;
+    color: var(--text-muted);
 }
 
-#device-list {
-    list-style: none;
-    padding: 0;
-    margin: 16px 0;
-    overflow-y: auto;
-    flex: 1;
+/* Selected device */
+.device.selected {
+    background: linear-gradient(135deg, #c77dff, #8b5cf6);
+    box-shadow: 0 0 18px rgba(199,125,255,0.65);
+    color: #111;
 }
 
-#device-list li {
-    padding: 10px;
-    border-bottom: 1px solid rgba(255,255,255,0.1);
-    cursor: pointer;
+.device.selected .device-main,
+.device.selected .device-sub {
+    color: #111;
 }
 
-#device-list li:hover {
-    background: rgba(255,255,255,0.1);
+.device.selected .device-sub {
+    opacity: 0.85;
 }
 
-#close-overlay {
-    background: var(--danger);
+/* Cancel button */
+.btn.cancel {
+    width: 100%;
+    padding: 12px;
+    border-radius: 999px;
     border: none;
-    padding: 10px;
-    border-radius: 8px;
-    color: white;
+    background: #d16b7d;
+    color: #fff;
+    font-size: 15px;
     cursor: pointer;
+    transition: transform 0.15s ease, background 0.2s;
     font-weight: 600;
 }
+
+.btn.cancel:hover {
+    transform: scale(1.02);
+    background: #e17c8d;
+}