feat: update login page

lib/presentation/pages/auth/login/login_page.dart

@@ -1,5 +1,6 @@
 import 'package:auto_route/auto_route.dart';
 import 'package:flutter/material.dart';
+import 'dart:math' as math;
 
 import '../../../../common/extension/extension.dart';
 import '../../../../common/theme/theme.dart';
@@ -26,8 +27,13 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
 
   late AnimationController _fadeController;
   late AnimationController _slideController;
+  late AnimationController _backgroundController;
+  late AnimationController _floatingController;
+
   late Animation<double> _fadeAnimation;
   late Animation<Offset> _slideAnimation;
+  late Animation<double> _backgroundAnimation;
+  late Animation<double> _floatingAnimation;
 
   @override
   void initState() {
@@ -43,6 +49,16 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
       vsync: this,
     );
 
+    _backgroundController = AnimationController(
+      duration: const Duration(seconds: 10),
+      vsync: this,
+    )..repeat();
+
+    _floatingController = AnimationController(
+      duration: const Duration(seconds: 6),
+      vsync: this,
+    )..repeat(reverse: true);
+
     _fadeAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
       CurvedAnimation(parent: _fadeController, curve: Curves.easeInOut),
     );
@@ -51,8 +67,19 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
         Tween<Offset>(begin: const Offset(0, 0.3), end: Offset.zero).animate(
           CurvedAnimation(parent: _slideController, curve: Curves.easeOutCubic),
         );
+
+    _backgroundAnimation = Tween<double>(
+      begin: 0.0,
+      end: 2 * math.pi,
+    ).animate(_backgroundController);
+
+    _floatingAnimation = Tween<double>(begin: -20.0, end: 20.0).animate(
+      CurvedAnimation(parent: _floatingController, curve: Curves.easeInOut),
+    );
+
     _emailController.text = 'test@example.com';
     _passwordController.text = 'password';
+
     _fadeController.forward();
     _slideController.forward();
   }
@@ -61,6 +88,8 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
   void dispose() {
     _fadeController.dispose();
     _slideController.dispose();
+    _backgroundController.dispose();
+    _floatingController.dispose();
     _emailController.dispose();
     _passwordController.dispose();
     super.dispose();
@@ -86,7 +115,13 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      body: Container(
+      body: AnimatedBuilder(
+        animation: Listenable.merge([
+          _backgroundController,
+          _floatingController,
+        ]),
+        builder: (context, child) {
+          return Container(
             decoration: const BoxDecoration(
               gradient: LinearGradient(
                 begin: Alignment.topLeft,
@@ -94,10 +129,18 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
                 colors: AppColor.primaryGradient,
               ),
             ),
-        child: SafeArea(
+            child: Stack(
+              children: [
+                // Animated background elements
+                _buildAnimatedBackground(),
+
+                // Main content
+                SafeArea(
                   child: Center(
                     child: SingleChildScrollView(
-              padding: EdgeInsets.symmetric(horizontal: AppValue.padding),
+                      padding: EdgeInsets.symmetric(
+                        horizontal: AppValue.padding,
+                      ),
                       child: FadeTransition(
                         opacity: _fadeAnimation,
                         child: SlideTransition(
@@ -115,8 +158,122 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
                     ),
                   ),
                 ),
+              ],
             ),
           );
+        },
+      ),
+    );
+  }
+
+  Widget _buildAnimatedBackground() {
+    return Stack(
+      children: [
+        // Floating circles
+        ...List.generate(6, (index) {
+          final double size = 80 + (index * 40);
+          final double left =
+              (index * 60.0) % MediaQuery.of(context).size.width;
+          final double top =
+              (index * 120.0) % MediaQuery.of(context).size.height;
+
+          return Positioned(
+            left: left + math.sin(_backgroundAnimation.value + index) * 30,
+            top: top + _floatingAnimation.value + (index * 10),
+            child: Container(
+              width: size,
+              height: size,
+              decoration: BoxDecoration(
+                shape: BoxShape.circle,
+                color: Colors.white.withOpacity(0.1),
+                border: Border.all(
+                  color: Colors.white.withOpacity(0.2),
+                  width: 2,
+                ),
+              ),
+            ),
+          );
+        }),
+
+        // Rotating geometric shapes
+        Positioned(
+          top: 100,
+          right: 50,
+          child: Transform.rotate(
+            angle: _backgroundAnimation.value,
+            child: Container(
+              width: 60,
+              height: 60,
+              decoration: BoxDecoration(
+                color: Colors.white.withOpacity(0.08),
+                borderRadius: BorderRadius.circular(12),
+                border: Border.all(
+                  color: Colors.white.withOpacity(0.15),
+                  width: 1,
+                ),
+              ),
+            ),
+          ),
+        ),
+
+        Positioned(
+          bottom: 150,
+          left: 30,
+          child: Transform.rotate(
+            angle: -_backgroundAnimation.value * 0.5,
+            child: Container(
+              width: 80,
+              height: 80,
+              decoration: BoxDecoration(
+                color: Colors.white.withOpacity(0.06),
+                shape: BoxShape.circle,
+                border: Border.all(
+                  color: Colors.white.withOpacity(0.12),
+                  width: 1,
+                ),
+              ),
+            ),
+          ),
+        ),
+
+        // Floating particles
+        ...List.generate(8, (index) {
+          return Positioned(
+            left: (index * 45.0) % MediaQuery.of(context).size.width,
+            top: (index * 80.0) % MediaQuery.of(context).size.height,
+            child: Transform.translate(
+              offset: Offset(
+                math.sin(_backgroundAnimation.value + index * 0.5) * 20,
+                math.cos(_backgroundAnimation.value + index * 0.3) * 15,
+              ),
+              child: Container(
+                width: 4 + (index % 3) * 2,
+                height: 4 + (index % 3) * 2,
+                decoration: BoxDecoration(
+                  shape: BoxShape.circle,
+                  color: Colors.white.withOpacity(0.3),
+                ),
+              ),
+            ),
+          );
+        }),
+
+        // Gradient overlay for better text readability
+        Container(
+          decoration: BoxDecoration(
+            gradient: LinearGradient(
+              begin: Alignment.topCenter,
+              end: Alignment.bottomCenter,
+              colors: [
+                Colors.transparent,
+                Colors.black.withOpacity(0.1),
+                Colors.transparent,
+              ],
+            ),
+          ),
+        ),
+      ],
+    );
   }
 
   Widget _buildLogo(BuildContext context) {
@@ -127,13 +284,29 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
           style: AppStyle.h1.copyWith(
             fontWeight: FontWeight.bold,
             color: AppColor.white,
+            shadows: [
+              Shadow(
+                offset: const Offset(0, 2),
+                blurRadius: 10,
+                color: Colors.black.withOpacity(0.3),
+              ),
+            ],
           ),
           textAlign: TextAlign.center,
         ),
         const SpaceHeight(8),
         Text(
           context.lang.login_desc,
-          style: AppStyle.lg.copyWith(color: AppColor.textLight),
+          style: AppStyle.lg.copyWith(
+            color: AppColor.textLight,
+            shadows: [
+              Shadow(
+                offset: const Offset(0, 1),
+                blurRadius: 5,
+                color: Colors.black.withOpacity(0.2),
+              ),
+            ],
+          ),
         ),
       ],
     );
@@ -147,10 +320,17 @@ class _LoginPageState extends State<LoginPage> with TickerProviderStateMixin {
         color: AppColor.white,
         borderRadius: BorderRadius.circular(24),
         boxShadow: [
+          BoxShadow(
+            color: AppColor.black.withOpacity(0.15),
+            blurRadius: 40,
+            offset: const Offset(0, 20),
+            spreadRadius: 0,
+          ),
           BoxShadow(
             color: AppColor.black.withOpacity(0.1),
-            blurRadius: 30,
+            blurRadius: 10,
-            offset: const Offset(0, 15),
+            offset: const Offset(0, 5),
+            spreadRadius: 0,
           ),
         ],
       ),