Update app.py

app.py

@@ -265,8 +265,8 @@ custom_css = """
         transform: scale(0.95);
     }
     #clear-history {
-        background-color: #e53e3e; /* Red */
-        color: black;
+        background-color: linear-gradient(135deg, #ff0000 0%, #ff7300 100%); /* Red gradient */
+        color: white;
         border: none;
         border-radius: 8px;
         padding: 10px 13px;