diff --git a/css/back.css b/css/back.css
index d7a0cbd..51a8cf8 100644
--- a/css/back.css
+++ b/css/back.css
@@ -18,6 +18,7 @@
   background-image: linear-gradient(hsl(158, 82, 57, 85%), hsl(252, 82, 57));
   animation: rotate var(--speed) var(--easing) alternate infinite;
   border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
+  z-index: -100;
 }
 
 @media (min-width: 720px) {