diff --git a/sys0-code/app/manage_user.php b/sys0-code/app/manage_user.php
index d502891..14a29db 100644
--- a/sys0-code/app/manage_user.php
+++ b/sys0-code/app/manage_user.php
@@ -172,13 +172,13 @@ function load_user()
 	<div class="container" style="min-height:95vh">
 		<div class="row">
 			<div class="col-mt-12">
-				<div style="display:flex">
-					<h4>Nach Benutzer suchen, um zu verwalten</h4>
-					<form action="manage_user.php" method="GET">
-						<input type="text" class="form-control" name="username" style="width:70%">
-						<button type="submit" class="btn btn-primary" style="width:25%">Search</button>
-					</form>
-				</div>
+				 <div class="d-flex flex-column align-items-center bg-white border rounded p-4 shadow" style="width: 80%; max-width: 600px;">
+        <h4>Nach Benutzer suchen, um zu verwalten</h4>
+        <form action="manage_user.php" method="GET" class="d-flex w-100 mt-3">
+            <input type="text" class="form-control flex-grow-1 mr-2" name="username" placeholder="Benutzername eingeben" style="padding: 0.375rem 0.75rem; border: 1px solid #ced4da; border-radius: 0.25rem;">
+            <button type="submit" class="btn btn-primary" style="padding: 0.375rem 0.75rem; border: none; border-radius: 0.25rem; cursor: pointer;">Search</button>
+        </form>
+    </div>
 				<!-- list users and their permissions -->
 				<?php
 					echo("<table class='table'>");