diff --git a/templates/components/navigation.gohtml b/templates/components/navigation.gohtml
index 2e070ea..661fa71 100644
--- a/templates/components/navigation.gohtml
+++ b/templates/components/navigation.gohtml
@@ -96,7 +96,7 @@
 
 {{define "header_navigation"}}
 {{$currentPath := .CurrentPath}}
-<header class="fixed inset-x-0 top-0 z-50 h-16 bg-background-sidebar">
+<header class="fixed inset-x-0 top-0 z-50 h-16 border-b border-border-light bg-background-sidebar">
   <nav class="flex h-full items-center justify-between pl-4 md:pl-8" aria-label="Primary navigation">
     <div class="flex h-full items-center gap-4">
       <a href="/" class="inline-flex size-12 items-center justify-center focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-foreground-muted" title="Home" aria-label="Home" aria-current="{{if eq $currentPath "/"}}page{{end}}">