diff --git a/src/static_src/css/bornhack.css b/src/static_src/css/bornhack.css
index 20313a2a..f19fc65b 100644
--- a/src/static_src/css/bornhack.css
+++ b/src/static_src/css/bornhack.css
@@ -12,6 +12,20 @@ a, a:active, a:focus {
    outline: none;
 }
 
+/* Z-index */
+/* Bootstrap values
+.dropdown-backdrop { z-index: 990; }
+.navbar-static-top, .dropdown-menu { z-index: 1000; }
+.navbar-fixed-top, .navbar-fixed-bottom { z-index: 1030; }
+.modal-backdrop { z-index: 1040; }
+.modal { z-index: 1050; }
+.popover { z-index: 1060; }
+.tooltip { z-index: 1070; }
+ */
+.sticky {
+  z-index: 980;
+}
+
 @media (max-width: 520px) {
   #main {
     width: 100%;
@@ -236,7 +250,6 @@ footer {
 .sticky {
   position: sticky;
   background-color: #fff;
-  z-index: 9999;
 }
 
 #daypicker {