diff --git a/web/templates/index.html b/web/templates/index.html
index 14dcf57..795a5e7 100644
--- a/web/templates/index.html
+++ b/web/templates/index.html
@@ -156,6 +156,12 @@
       border-left: 1px solid var(--rule);
     }
 
+    .mode-btn:focus,
+    .mode-btn:focus-visible {
+      outline: none;
+      box-shadow: none;
+    }
+
     .mode-btn.active {
       background: var(--ink);
       color: var(--white);