modified card and dissmiss padding

lib/box_checker.dart

@@ -43,6 +43,9 @@ class _MainListPageState extends State<MainListPage> {
   int _selectedPage = data.Page.lists.index;
   List<data.List> lists = [];
 
+  final double _marginHorizontal = 10;
+  final double _cardSpacing = 4;
+
   Future<void> _loadData(data.Page listType) async {
     lists.clear();
     var res = await DBHelper.dbHelper.getAllLists(listType);
@@ -66,6 +69,9 @@ class _MainListPageState extends State<MainListPage> {
 
   @override
   Widget build(BuildContext context) {
+    final EdgeInsets cardMargin =
+        EdgeInsets.symmetric(vertical: _cardSpacing, horizontal: 0);
+
     return Scaffold(
         appBar: AppBar(
           title: Text(widget.title),
@@ -83,7 +89,9 @@ class _MainListPageState extends State<MainListPage> {
           tooltip: 'Add List',
           child: const Icon(Icons.add),
         ),
-        body: RefreshIndicator(
+        body: Container(
+            padding: EdgeInsets.symmetric(horizontal: _marginHorizontal),
+            child: RefreshIndicator(
                 onRefresh: () => _loadData(data.Page.values[_selectedPage]),
                 child: ListView.builder(
                     itemCount: lists.length,
@@ -92,6 +100,7 @@ class _MainListPageState extends State<MainListPage> {
                         direction: DismissDirection.startToEnd,
                         key: Key(lists[index].id.toString()),
                         background: Card(
+                          margin: cardMargin,
                           color: Colors.red,
                           child: Row(
                             children: const [
@@ -137,6 +146,7 @@ class _MainListPageState extends State<MainListPage> {
                           });
                         },
                         child: Card(
+                          margin: cardMargin,
                           child: ListTile(
                             onTap: () {
                               Navigator.push(
@@ -152,7 +162,7 @@ class _MainListPageState extends State<MainListPage> {
                           ),
                         ),
                       );
-                })),
+                    }))),
         bottomNavigationBar: BottomNavigationBar(
             elevation: 4,
             currentIndex: _selectedPage,