diff --git a/lib/widgets/glass_app_bar.dart b/lib/widgets/glass_app_bar.dart
index 4440c37..e873a3b 100644
--- a/lib/widgets/glass_app_bar.dart
+++ b/lib/widgets/glass_app_bar.dart
@@ -41,7 +41,7 @@ class GlassAppBar extends StatelessWidget implements PreferredSizeWidget {
             color: glassColor,
             border: Border(
               bottom: BorderSide(
-                color: Colors.white.withOpacity(borderOpacity),
+                color: Colors.white.withValues(alpha: borderOpacity),
                 width: 1,
               ),
             ),
@@ -78,7 +78,7 @@ class GlassAppBar extends StatelessWidget implements PreferredSizeWidget {
                               fontWeight: FontWeight.w600,
                               letterSpacing: 0.4,
                             ),
-                            fillColor: Colors.white.withOpacity(0.95),
+                            fillColor: Colors.white.withValues(alpha: 0.95),
                             strokeColor: Colors.black,
                             strokeWidth: 1.5,
                           ),
@@ -116,7 +116,8 @@ class GlassIconButton extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final iconColor =
-        color ?? Theme.of(context).colorScheme.onSurface.withOpacity(0.85);
+        color ??
+        Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.85);
     return Tooltip(
       message: tooltip ?? '',
       child: InkWell(
@@ -129,9 +130,9 @@ class GlassIconButton extends StatelessWidget {
             child: Container(
               padding: const EdgeInsets.all(10),
               decoration: BoxDecoration(
-                color: Colors.white.withOpacity(0.12),
+                color: Colors.white.withValues(alpha: 0.12),
                 shape: BoxShape.circle,
-                border: Border.all(color: Colors.white.withOpacity(0.25)),
+                border: Border.all(color: Colors.white.withValues(alpha: 0.25)),
               ),
               child: Icon(icon, color: iconColor, size: 22),
             ),
diff --git a/lib/widgets/person_weight_card.dart b/lib/widgets/person_weight_card.dart
index 2365c7e..6ee250e 100644
--- a/lib/widgets/person_weight_card.dart
+++ b/lib/widgets/person_weight_card.dart
@@ -84,7 +84,7 @@ class PersonWeightCard extends StatelessWidget {
                       bottom: 12,
                     ),
                     itemCount: history.length,
-                    separatorBuilder: (_, __) => Divider(
+                    separatorBuilder: (_, _) => Divider(
                       color: Colors.white.withValues(alpha: 0.08),
                       height: 1,
                     ),