diff --git a/src/components/Header.astro b/src/components/Header.astro
index 0babb6c..01ba585 100644
--- a/src/components/Header.astro
+++ b/src/components/Header.astro
@@ -4,7 +4,7 @@ import { SITE_TITLE } from "@/consts";
 import ThemeToggle from "@components/ThemeToggle";
 ---
 <!-- sticky top-0 z-10 w-full -->
-<header class="m-0 px-4 shadow-lg dark:bg-zinc-800 bg-zinc-200 dark:text-zinc-300 text-black">
+<header class="m-0 px-4 border-b border-zinc-400/50 dark:border-zinc-700/60 dark:bg-zinc-800 bg-zinc-200 dark:text-zinc-300 text-black">
   <nav>
     <h2>
       <a href="/">{SITE_TITLE}</a>