Update app.py

app.py

@@ -9,17 +9,17 @@ app = Flask(__name__)
 # Define the path to static files
 static_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)))
 
-@app.route('/css')
-def css():
-    return send_from_directory(os.path.join(static_dir, 'css'))
+@app.route('/css/<path:filename>')
+def css(filename):
+    return send_from_directory(os.path.join(static_dir, 'css'), filename)
 
-@app.route('/js')
-def js():
-    return send_from_directory(os.path.join(static_dir, 'js'))
+@app.route('/js/<path:filename>')
+def js(filename):
+    return send_from_directory(os.path.join(static_dir, 'js'), filename)
 
-@app.route('/img')
-def img():
-    return send_from_directory(os.path.join(static_dir, 'img'))
+@app.route('/img/<path:filename>')
+def img(filename):
+    return send_from_directory(os.path.join(static_dir, 'img'), filename)
 
 @app.route('/')
 def index():