different border radius per device type and os

larger tiles on tablets

lib/utils/tile_size.dart

@@ -0,0 +1,24 @@
+import 'dart:io';
+
+import 'package:flutter/widgets.dart';
+
+enum DeviceType { phone, tablet }
+
+DeviceType getDeviceType() {
+  final data = MediaQueryData.fromWindow(WidgetsBinding.instance.window);
+  return data.size.shortestSide < 550 ? DeviceType.phone : DeviceType.tablet;
+}
+
+int calcTileMaxWidth() {
+  if (Platform.isLinux || Platform.isMacOS || Platform.isWindows) {
+    return 300;
+  } else if (Platform.isAndroid || Platform.isIOS) {
+    if (getDeviceType() == DeviceType.tablet) {
+      return 150;
+    } else {
+      return 100;
+    }
+  } else {
+    return 250;
+  }
+}