responsive-layoutlisted

# Responsive Layout in Flutter Techniques for building cross-platform Flutter layouts that adapt to phones, tablets, foldables, and desktops. ## Breakpoint System ```dart class ResponsiveBreakpoints { static const double mobile = 600; static const double tablet = 900; static const double desktop = 1200; static bool isMobile(BuildContext context) => MediaQuery.sizeOf(context).width < mobile; static bool isTablet(BuildContext context) => MediaQuery.sizeOf(context).width >= mobile && MediaQuery.sizeOf(context).width < desktop; static bool isDesktop(BuildContext context) => MediaQuery.sizeOf(context).width >= desktop; } ``` ## Pattern 1: `LayoutBuilder` for Component Adaptability Use `LayoutBuilder` when a component should adapt based on its parent container's width, rather than the entire screen: ```dart class AdaptiveCardList extends StatelessWidget { const AdaptiveCardList({super.key}); @override Widget build(BuildContext context) { return LayoutBuilder( builder: (context, constraints) { if (constraints.maxWidth > 800) { // Grid layout on wide containers return GridView.builder( gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount( crossAxisCount: 3, childAspectRatio: 1.5, crossAxisSpacing: 16, mainAxisSpacing: 16, ), itemCount: 9, itemBuilder: (context, index) => CardTile(inde