diff --git a/client/src/App.css b/client/src/App.css
index 9bad2c7..adeb030 100644
--- a/client/src/App.css
+++ b/client/src/App.css
@@ -76,6 +76,31 @@
   box-shadow: inset 0 2px 0 #6ab04c, inset 0 -2px 0 #2d6b1a;
 }
 
+/* === Cross-link Button === */
+.cross-link-btn {
+  display: flex;
+  align-items: center;
+  gap: 0.25rem;
+  padding: 0.5rem 1rem;
+  border: 2px solid #1a1a1a;
+  background: #2e4a8b;
+  color: #55ffff;
+  font-size: 0.875rem;
+  font-weight: 700;
+  font-family: 'Silkscreen', 'Courier New', monospace;
+  text-shadow: 1px 1px 0 #1a1a1a;
+  text-decoration: none;
+  cursor: pointer;
+  transition: all 0.1s;
+  box-shadow: inset 0 2px 0 #4466bb, inset 0 -2px 0 #1a2a66;
+  white-space: nowrap;
+}
+
+.cross-link-btn:hover {
+  background: #3e5a9b;
+  color: white;
+}
+
 .panel-content-wrapper {
   flex: 1;
   overflow: hidden;