feat: custom button

lib/custom button.dart

@@ -0,0 +1,123 @@
+import 'package:flutter/material.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+const Color lightPrimaryColor = Color(0xFF6C98FF);
+const Color lightSecondaryColor = Color(0xFF87A9F7);
+
+const Color darkPrimaryColor = Color(0xFF497BEE);
+const Color darkSecondaryColor = Color(0xFF6C98FF);
+
+const Color disabledColor = Color(0xFF808080);
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Button Variants Demo',
+      themeMode: ThemeMode.system,
+      theme: ThemeData(
+        useMaterial3: true,
+        brightness: Brightness.light,
+        colorScheme: ColorScheme.light(
+          primary: lightPrimaryColor,
+          secondary: lightSecondaryColor,
+        ),
+      ),
+      darkTheme: ThemeData(
+        useMaterial3: true,
+        brightness: Brightness.dark,
+        colorScheme: ColorScheme.dark(
+          primary: darkPrimaryColor,
+          secondary: darkSecondaryColor,
+        ),
+      ),
+      home: const ButtonDemoPage(),
+    );
+  }
+}
+
+class ButtonDemoPage extends StatelessWidget {
+  const ButtonDemoPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text("Button Variants")),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          children: const [
+            CustomButton(variant: 'surface', disabled: false),
+            SizedBox(height: 10),
+            CustomButton(variant: 'surface', disabled: true),
+            SizedBox(height: 10),
+            CustomButton(variant: 'outline', disabled: false),
+            SizedBox(height: 10),
+            CustomButton(variant: 'outline', disabled: true),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class CustomButton extends StatelessWidget {
+  final String variant;
+  final bool disabled;
+
+  const CustomButton({
+    super.key,
+    required this.variant,
+    required this.disabled,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final bool isOutline = variant == 'outline';
+    final colorScheme = Theme.of(context).colorScheme;
+    final Color primary = colorScheme.primary;
+
+    return SizedBox(
+      width: 120,
+      height: 34,
+      child: ElevatedButton(
+        onPressed: disabled ? null : () {},
+        style: ButtonStyle(
+          backgroundColor: WidgetStateProperty.resolveWith<Color>((states) {
+            if (states.contains(WidgetState.disabled)) {
+              return isOutline ? Colors.white : disabledColor;
+            }
+            return isOutline ? Colors.white : primary;
+          }),
+          foregroundColor: WidgetStateProperty.resolveWith<Color>((states) {
+            if (states.contains(WidgetState.disabled)) {
+              return isOutline ? disabledColor : Colors.white;
+            }
+            return isOutline ? primary : Colors.white;
+          }),
+          side: WidgetStateProperty.resolveWith<BorderSide>((states) {
+            if (!isOutline) return BorderSide.none;
+            return BorderSide(
+              color: states.contains(WidgetState.disabled)
+                  ? disabledColor
+                  : primary,
+            );
+          }),
+          padding: WidgetStateProperty.all(
+            const EdgeInsets.symmetric(vertical: 8, horizontal: 12),
+          ),
+          elevation: WidgetStateProperty.all(0),
+          shape: WidgetStateProperty.all(
+            RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
+          ),
+        ),
+        child: const Text('Button', style: TextStyle(fontSize: 12)),
+      ),
+    );
+  }
+}