add application file

app.py

@@ -0,0 +1,40 @@
+import gradio as gr
+
+def greet(name):
+    return f"Hello {name}!"
+
+demo = gr.Interface(
+    fn=greet,
+    inputs=gr.Textbox(placeholder="Enter your name"),
+    outputs="text",
+    title="Greeting App",
+    description="A simple app to greet users.",
+    theme="default",
+    allow_flagging="never",
+    allow_screenshot=False,
+    css="""
+    body {
+        background-color: #f0f0f0;
+    }
+    .gradio-container {
+        font-family: Arial, sans-serif;
+    }
+    .gr-button {
+        background-color: #007bff;
+        color: white;
+    }
+    .gr-button:hover {
+        background-color: #0056b3;
+    }
+    .gr-textbox {
+        border: 2px solid #007bff;
+        border-radius: 5px;
+    }
+    .gr-textbox:focus {
+        border-color: #0056b3;
+        box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
+    }
+    """
+)
+
+demo.launch()