Fix video modal dropdown stacking

css/style.css

@@ -321,7 +321,7 @@ header img {
     max-width: 64rem;
     max-height: calc(100vh - 4rem); /* Account for padding */
     border-radius: 0.5rem;
-    overflow: hidden;
+    overflow: visible;
   }
 
   .video-container {
@@ -329,6 +329,16 @@ header img {
   }
 }
 
+#modalNav {
+  position: sticky;
+  top: 0;
+  z-index: 60;
+}
+
+[data-more-menu="true"] {
+  z-index: 70;
+}
+
 /* Mobile-specific styles */
 @media (max-width: 767px) {
   #playerModal {