Merge pull request #1433 from segmentio/fix-agolia-z-index

fix: remove zero z-index property

Author: markzegarelli

src/_sass/pages/_docs.scss

@@ -19,7 +19,7 @@
 
   &__navbar {
     position: relative;
-    z-index: 0;
+    z-index: 1;
     padding: 16px 40px;
     display: none;