Add video overlay styles and position relative to .video-shell

client/src/index.css

@@ -167,6 +167,7 @@ h4 {
   overflow: hidden;
   box-shadow: 0 14px 30px rgba(0, 0, 0, 0.2);
   max-width: 960px;
+  position: relative;
 }
 
 .video-shell video {
@@ -185,6 +186,21 @@ h4 {
   box-shadow: 0 10px 18px rgba(0, 0, 0, 0.18);
 }
 
+.video-overlay {
+  position: absolute;
+  inset: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.5rem;
+  background: linear-gradient(180deg, rgba(0, 0, 0, 0.45), rgba(0, 0, 0, 0.65));
+  padding: 1rem;
+}
+
+.video-overlay .button {
+  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
+}
+
 .video-row {
   display: flex;
   flex-direction: column;