Change some UI codes

lib/EAnalyzer/SearchEvent.dart

@@ -71,7 +71,14 @@ class _ListPageState extends State<ListPage> {
             itemCount: snapshot.data.length,
             itemBuilder: (_, index){
               return Card(
+                elevation: 8,
+                shape: RoundedRectangleBorder(
+                  borderRadius: BorderRadius.circular(15.0),
+                ),
+                
+                color: Colors.lightGreen[100],
                 child: ListTile(
+                  leading: Icon(Icons.location_city, size: 40),
                   title: Text(snapshot.data[index].data()["hotelName"]),
                   subtitle: Text(snapshot.data[index].data()["riskLocation"]),
                   onTap: () => navigateToDetail(snapshot.data[index]),