Update app.py

app.py

@@ -289,7 +289,7 @@ async def analyze_file(file: UploadFile = File(...)):
                     margin-top: 20px;
                 }}
                 .result-box {{
-                    background: white;
+                    background: #2d2d2d;
                     padding: 20px;
                     border-radius: 12px;
                     margin: 10px 0;