diff --git a/public/script.js b/public/script.js
index 9dc09a9..d0a26fe 100644
--- a/public/script.js
+++ b/public/script.js
@@ -424,7 +424,11 @@ function displayClusterMembers(members, expandedCards = new Map()) {
                             <span class="latency-value">${member.latency ? member.latency + 'ms' : 'N/A'}</span>
                         </div>
                     </div>
-                    <div class="expand-icon">▶️</div>
+                    <div class="expand-icon">
+                    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                        <path d="M6 9l6 6 6-6"/>
+                    </svg>
+                </div>
                 </div>
                 <div class="member-details">
                     <div class="loading-details">Loading detailed information...</div>
diff --git a/public/styles.css b/public/styles.css
index a8daa91..e91ac37 100644
--- a/public/styles.css
+++ b/public/styles.css
@@ -150,8 +150,23 @@ p {
     transform: scale(1.02);
 }
 
+.expand-icon:hover {
+    background: rgba(255, 255, 255, 0.1);
+    color: rgba(255, 255, 255, 0.9);
+    border-color: rgba(255, 255, 255, 0.2);
+}
+
+.expand-icon:hover svg {
+}
+
 .member-card.expanded .expand-icon {
-    transform: rotate(90deg);
+    background: rgba(255, 255, 255, 0.15);
+    border-color: rgba(255, 255, 255, 0.25);
+    color: rgba(255, 255, 255, 0.9);
+}
+
+.member-card.expanded .expand-icon svg {
+    transform: rotate(180deg);
 }
 
 .member-header {
@@ -166,9 +181,25 @@ p {
 }
 
 .expand-icon {
-    font-size: 1.2rem;
-    opacity: 0.7;
-    transition: transform 0.3s ease;
+    color: rgba(255, 255, 255, 0.7);
+    cursor: pointer;
+    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+    margin-left: auto;
+    padding: 0.25rem;
+    border-radius: 8px;
+    background: rgba(255, 255, 255, 0.05);
+    border: 1px solid rgba(255, 255, 255, 0.1);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.expand-icon svg {
+    width: 20px;
+    height: 20px;
+    stroke: currentColor;
+    stroke-width: 2;
+    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
 }
 
 .member-details {