diff --git a/assets/stylesheets/common/campaign.scss b/assets/stylesheets/common/campaign.scss
index 94d783d..ebd635a 100644
--- a/assets/stylesheets/common/campaign.scss
+++ b/assets/stylesheets/common/campaign.scss
@@ -1,3 +1,5 @@
+@use "sass:math";
+
 .subscription-campaign-sidebar {
   #main-outlet
     .container.list-container
@@ -329,11 +331,10 @@ $sidebar-box-shadow2: ();
 
 @for $i from 0 through $particles {
   $box-shadow: $box-shadow,
-    random($width)-$width /
-      2 +
+    random($width)-$width *
+      0.5 +
       px
-      random($height)-$height /
-      1.2 +
+      random($height)-math.div($height, 1.2) +
       px
       hsl(random(360), 100, 50);
   $box-shadow2: $box-shadow2, 0 0 #fff;
@@ -341,11 +342,10 @@ $sidebar-box-shadow2: ();
 
 @for $i from 0 through $sidebar-particles {
   $sidebar-box-shadow: $sidebar-box-shadow,
-    random($sidebar-width)-$sidebar-width /
-      2 +
+    random($sidebar-width)-$sidebar-width *
+      0.5 +
       px
-      random($sidebar-height)-$sidebar-height /
-      1.2 +
+      random($sidebar-height)-math.div($sidebar-height, 1.2) +
       px
       hsl(random(360), 100, 50);
   $sidebar-box-shadow2: $sidebar-box-shadow2, 0 0 #fff;