Update app.py

app.py

@@ -4,7 +4,15 @@ os.environ["KERAS_BACKEND"] = "tensorflow"
 import keras
 import keras_nlp
 
-css = ".container {background: url(https://stsci-opo.org/STScI-01J6D97YGSQACWK990TH56K6AF.png); background-size: cover; opacity=0.2}"
+css = """
+body {
+    background-image: url('https://stsci-opo.org/STScI-01J6D97YGSQACWK990TH56K6AF.png');
+    background-size: cover;
+    background-repeat: no-repeat;
+    background-position: center;
+    opacity: 0.1;
+}
+"""
 
 
 gemma_lm = keras_nlp.models.CausalLM.from_preset("hf://sultan-hassan/CosmoGemma_2b_en")