diff --git a/assets/stylesheets/lesson/index.css b/assets/stylesheets/lesson/index.css
index 279ff13..814f79d 100644
--- a/assets/stylesheets/lesson/index.css
+++ b/assets/stylesheets/lesson/index.css
@@ -42,6 +42,9 @@
     font-size: 0.7em;
     color: var(--code-trigger-color);
 
+    cursor: pointer;
+    user-select: none;
+
     &:last-child {
       margin-right: 0;
     }
@@ -49,6 +52,7 @@
     @modifier active {
       background: var(--code-trigger-bg-active);
       color: var(--code-trigger-color-active);
+      cursor: default;
     }
   }
 
diff --git a/public/stylesheets/style.css b/public/stylesheets/style.css
index 46dfecd..d22f9ff 100644
--- a/public/stylesheets/style.css
+++ b/public/stylesheets/style.css
@@ -2066,6 +2066,12 @@ github.com style (c) Vasily Polovnyov <vast@whiteants.net>
     font-family: 'robotomedium', Helvetica, sans-serif;
     font-size: 0.7em;
     color: #fff;
+
+    cursor: pointer;
+    -webkit-user-select: none;
+       -moz-user-select: none;
+        -ms-user-select: none;
+            user-select: none;
 }
 
 .lesson-module-code__trigger:last-child {
@@ -2075,6 +2081,7 @@ github.com style (c) Vasily Polovnyov <vast@whiteants.net>
 .lesson-module-code__trigger--active {
       background: #f7f9fa;
       color: #a9b9c0;
+      cursor: default;
 }
 
 .lesson-module-code__code {