diff --git a/static/app.css b/static/app.css
index 138fb9b..925e3c2 100644
--- a/static/app.css
+++ b/static/app.css
@@ -13,6 +13,9 @@ body {
 }
   /* Header styles */
   .site-header {
+    position: sticky;
+    top: 0;
+    z-index: 1000;
     display: flex;
     align-items: center;
     padding: 10px 20px;
@@ -74,10 +77,15 @@ li {
   box-shadow: 0 1px 3px rgba(0,0,0,0.1);
 }
 
+/* mouse symbol for links */
+li.directory-item, li.file-item,
+li.directory-item a, li.file-item a {
+  cursor: pointer;
+}
+
 /* Directory Items (in a list) */
 .directory-item {
   padding: 15px;
-  /* Use flex for list items if needed */
 }
 
 /* Grid Layout for Directories */
@@ -100,23 +108,19 @@ li {
   grid-template-columns: 1fr auto;
   align-items: center;
   margin: 10px 0;
-  padding: 15px;
+  padding: 15px 10px;
   background-color: #fff;
   border-radius: 5px;
   box-shadow: 0 1px 3px rgba(0,0,0,0.1);
 }
 
 /* Link Styles */
-a.directory-link,
+.directory-link,
 a.play-file {
   color: #34495e;
   text-decoration: none;
   word-break: break-all;
 }
-a.directory-link:hover,
-a.play-file:hover {
-  color: #34495e;
-}
 a.show-transcript {
   text-decoration: none;
   color: #34495e;
diff --git a/static/app.js b/static/app.js
index e984a2a..0a824de 100644
--- a/static/app.js
+++ b/static/app.js
@@ -20,50 +20,39 @@ function renderContent(data) {
   // Render breadcrumbs, directories (grid view when appropriate), and files.
   let breadcrumbHTML = '';
   data.breadcrumbs.forEach((crumb, index) => {
-    breadcrumbHTML += `<a href="#" data-path="${crumb.path}">${crumb.name}</a>`;
+    breadcrumbHTML += `<a href="#" class="breadcrumb-link" data-path="${crumb.path}">${crumb.name}</a>`;
     if (index < data.breadcrumbs.length - 1) {
       breadcrumbHTML += `<span>&gt;</span>`;
     }
   });
   document.getElementById('breadcrumbs').innerHTML = breadcrumbHTML;
 
-  // Render directories.
+  // Build the HTML for directories and files.
   let contentHTML = '';
   if (data.directories.length > 0) {
     contentHTML += '<ul>';
-    // Check if every directory name is short (≤15 characters)
-    const areAllShort = data.directories.every(dir => dir.name.length <= 15);
-    if (areAllShort) {
-      contentHTML += '<div class="directories-grid">';
-      data.directories.forEach(dir => {
-        contentHTML += `<div class="directory-item">📁 <a href="#" class="directory-link" data-path="${dir.path}">${dir.name}</a></div>`;
-      });
-      contentHTML += '</div>';
-    } else {
-      contentHTML += '<ul>';
-      data.directories.forEach(dir => {
-        contentHTML += `<li class="directory-item">📁 <a href="#" class="directory-link" data-path="${dir.path}">${dir.name}</a></li>`;
-      });
-      contentHTML += '</ul>';
-    }
+    data.directories.forEach(dir => {
+      contentHTML += `
+        <li class="directory-item">
+          📁 <a href="#" class="directory-link" data-path="${dir.path}">${dir.name}</a>
+        </li>`;
+    });
+    contentHTML += '</ul>';
   }
 
-  // Render files.
   if (data.files.length > 0) {
     contentHTML += '<ul>';
     data.files.forEach((file, idx) => {
       let symbol = '📄';
       if (file.file_type === 'music') {
         symbol = '🔊';
-        // Add each music file to currentMusicFiles with its index.
         currentMusicFiles.push({ path: file.path, index: idx });
       } else if (file.file_type === 'image') {
         symbol = '🖼️';
       }
-      // Add a data-index attribute for music files.
       const indexAttr = file.file_type === 'music' ? ` data-index="${currentMusicFiles.length - 1}"` : '';
       contentHTML += `<li class="file-item">
-              <a href="#" class="play-file"${indexAttr} data-url="${file.path}" data-file-type="${file.file_type}">${symbol} ${file.name.replace('.mp3', '')}</a>`;
+                <a href="#" class="play-file"${indexAttr} data-url="${file.path}" data-file-type="${file.file_type}">${symbol} ${file.name.replace('.mp3', '')}</a>`;
       if (file.has_transcript) {
         contentHTML += `<a href="#" class="show-transcript" data-url="${file.transcript_url}" title="Show Transcript">&#128196;</a>`;
       }
@@ -72,7 +61,35 @@ function renderContent(data) {
     contentHTML += '</ul>';
   }
 
+  // Insert the generated HTML into a container in the DOM.
   document.getElementById('content').innerHTML = contentHTML;
+
+  // Now attach the event listeners for directories.
+  document.querySelectorAll('li.directory-item').forEach(li => {
+    li.addEventListener('click', function(e) {
+      // Only trigger if the click did not start on an <a>.
+      if (!e.target.closest('a')) {
+        const anchor = li.querySelector('a.directory-link');
+        if (anchor) {
+          anchor.click();
+        }
+      }
+    });
+  });
+
+  // Now attach the event listeners for files.
+  document.querySelectorAll('li.file-item').forEach(li => {
+    li.addEventListener('click', function(e) {
+      // Only trigger if the click did not start on an <a>.
+      if (!e.target.closest('a')) {
+        const anchor = li.querySelector('a.play-file');
+        if (anchor) {
+          anchor.click();
+        }
+      }
+    });
+  });
+  
   // Update global variable for gallery images (only image files).
   currentGalleryImages = data.files
     .filter(f => f.file_type === 'image')
diff --git a/static/audioplayer.js b/static/audioplayer.js
index d96c932..657e9b0 100644
--- a/static/audioplayer.js
+++ b/static/audioplayer.js
@@ -101,7 +101,9 @@ function updateTimeInfo() {
 audio.ontimeupdate = function() {
   changeTimelinePosition();
   updateTimeInfo();
-  if ('mediaSession' in navigator && typeof navigator.mediaSession.setPositionState === 'function') {
+  if ('mediaSession' in navigator &&
+      typeof navigator.mediaSession.setPositionState === 'function' &&
+      !isNaN(audio.duration)) {
     navigator.mediaSession.setPositionState({
       duration: audio.duration,
       playbackRate: audio.playbackRate,
@@ -112,7 +114,9 @@ audio.ontimeupdate = function() {
 
 // --- Also update media session on play (in case timeupdate lags) ---
 audio.onplay = function() {
-  if ('mediaSession' in navigator && typeof navigator.mediaSession.setPositionState === 'function') {
+  if ('mediaSession' in navigator &&
+      typeof navigator.mediaSession.setPositionState === 'function' &&
+      !isNaN(audio.duration)) {
     navigator.mediaSession.setPositionState({
       duration: audio.duration,
       playbackRate: audio.playbackRate,