diff --git a/style/base.css b/style/base.css
index ac0d54f..05bba3d 100644
--- a/style/base.css
+++ b/style/base.css
@@ -19,3 +19,17 @@
 #jupyter-ai-tutor-panel .jp-chat-input-container .jp-chat-input-toolbar {
   border-top: none;
 }
+
+/* Override toolbar visibility on cell overlap */
+/* stylelint-disable-next-line selector-class-pattern */
+.jp-toolbar-overlap .jp-cell-toolbar {
+  display: flex !important;
+  opacity: 0.15;
+}
+
+/* stylelint-disable-next-line selector-class-pattern */
+.jp-toolbar-overlap .jp-cell-toolbar:hover {
+  opacity: 1 !important;
+  background-color: var(--jp-layout-color1);
+  box-shadow: var(--jp-elevation-z2);
+}