diff --git a/example.css b/example.css
index 5b1108d..bcc292e 100644
--- a/example.css
+++ b/example.css
@@ -156,7 +156,7 @@ textarea:not([disabled]):focus {
     background-color: gray; }
 
 .hover_full_view_change {
-  z-index: 1000;
+  z-index: 100;
   background-color: rgba(0, 0, 0, 0.5);
   transition: background-color .2s ease-in-out;
   pointer-events: none; }
diff --git a/global/_config.scss b/global/_config.scss
index e6fe272..49f09bd 100644
--- a/global/_config.scss
+++ b/global/_config.scss
@@ -112,7 +112,10 @@ $basic_color_map: ();
 
 $box_sizing: $default_box_sizing;
 
-$z_top: 1000;
+$z_heaven: 100;
+$z_top: 10;
+$z_basic: 1;
+$z_earth: -100;
 
 $basic_width: 96%;
 $width_small: 80%;