diff --git a/theme/themes/eea/extras/contentBox.less b/theme/themes/eea/extras/contentBox.less
index 57b19989f9..6ae12b71c6 100644
--- a/theme/themes/eea/extras/contentBox.less
+++ b/theme/themes/eea/extras/contentBox.less
@@ -16,6 +16,7 @@
   margin-right: -50vw;
   left: 50%;
   right: 50%;
+  z-index: @contentBoxBeforeZIndex;
 }
 
 .content-box {
@@ -28,7 +29,6 @@
     padding-top: @contentBoxContainerMarginTop;
     padding-bottom: @contentBoxContainerMarginBottom;
     position: relative;
-    z-index: @contentBoxContainerZIndex;
   }
 
   &.primary {
diff --git a/theme/themes/eea/extras/contentBox.variables b/theme/themes/eea/extras/contentBox.variables
index fa8b09ea19..be0166b787 100644
--- a/theme/themes/eea/extras/contentBox.variables
+++ b/theme/themes/eea/extras/contentBox.variables
@@ -8,6 +8,7 @@
 @contentBoxBackgroundColor: @grey-1;
 @contentBoxNoBackground: transparent;
 @contentBoxColorInverted : inherit;
+@contentBoxBeforeZIndex: -1;
 
 /* Themes */
 @contentBoxBackgroundColorPrimary: @primaryColor;