diff --git a/core/templates/base.html b/core/templates/base.html
index d636f86..a22ffc7 100644
--- a/core/templates/base.html
+++ b/core/templates/base.html
@@ -24,7 +24,23 @@
 </head>
 
 <body>
-  {% block content %}{% endblock %}
+  {% if user.is_authenticated %}
+  <nav class="navbar navbar-expand-lg navbar-light bg-light mb-3">
+    <div class="container">
+      <a class="navbar-brand" href="{% url 'project_list' %}">AI Business Planning</a>
+      <div class="d-flex align-items-center">
+        <span class="navbar-text me-3">Welcome, {{ user.username }}</span>
+        <form method="post" action="{% url 'logout' %}">
+          {% csrf_token %}
+          <button type="submit" class="btn btn-outline-secondary btn-sm">Logout</button>
+        </form>
+      </div>
+    </div>
+  </nav>
+  {% endif %}
+  <div class="container">
+    {% block content %}{% endblock %}
+  </div>
 </body>
 
 </html>
\ No newline at end of file
