diff --git a/src/css/frontend.scss b/src/css/frontend.scss
index 6b23dece..cb7138a1 100644
--- a/src/css/frontend.scss
+++ b/src/css/frontend.scss
@@ -2,15 +2,6 @@
 @import '_variables';
 @import '_citations';
 
-@mixin toggle-base {
-    @include reset;
-    position: relative;
-    font-weight: 600;
-    padding: 5px;
-    vertical-align: middle;
-    user-select: none;
-}
-
 :global {
     .abt-bibligraphy__container {
         display: block;
@@ -20,11 +11,15 @@
     }
 
     .abt-bibliography__heading_toggle {
-        @include toggle-base;
+        @include reset;
+        position: relative;
+        font-weight: 600;
+        padding: 5px;
+        vertical-align: middle;
+        user-select: none;
     }
 
     .abt-bibliography__heading_toggle:hover {
-        @include toggle-base;
         padding: 5px;
         vertical-align: middle;
         user-select: none;
@@ -44,7 +39,6 @@
     }
 
     .abt-bibliography__heading_toggle:focus {
-        @include toggle-base;
         padding: 5px;
         vertical-align: middle;
         user-select: none;