Update demo.py

demo.py

@@ -5,7 +5,7 @@ def run_test_power(model_name, real_text, generated_text, N=10):
     return "Prediction: Human (Mocked)"
 
 css = """
-#header { text-align: center; font-size: 3em; margin-bottom: 20px; }
+#header { text-align: center; font-size: 2em; margin-bottom: 15px; }
 #output-text { font-weight: bold; font-size: 1.2em; }
 .links {
     display: flex;