Update app.py

app.py

@@ -10,7 +10,7 @@ import sklearn
 custom_css = """
 <style>
     html, body, [data-testid="stAppViewContainer"] {
-        background:url('https://images.pexels.com/photos/8849288/pexels-photo-8849288.jpeg?auto=compress&cs=tinysrgb&w=600') no-repeat center center fixed;
+        background:url('https://images.pexels.com/photos/19670/pexels-photo.jpg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=2') no-repeat center center fixed;
         background-size: cover; /* Cover the entire screen */
         font-family: Arial, sans-serif;
         color: #333333;