main, change layout so that minutes cannot be modified while the alarm is enabled, also handle validation better.

lib/main.dart

@@ -66,6 +66,9 @@ class _HomeScreenState extends State<HomeScreen> {
   int _minutesBefore = 30;
   bool _loading = false;
 
+  String? _sunsetErrorText = null;
+  String? _minuteErrorText = null;
+
   static const _alarmId = 1001;
 
   @override
@@ -426,40 +429,46 @@ class _HomeScreenState extends State<HomeScreen> {
             // --- Minutes before ---
             Row(
               children: [
-                const Text('Minutes before: '),
+                if (!_alarmEnabled)
-                SizedBox(
+                  Expanded(
-                  width: 80,
+                    child: TextField(
-                  child: TextField(
+                      controller: _minutesController,
-                    controller: _minutesController,
+                      keyboardType: TextInputType.number,
-                    keyboardType: TextInputType.number,
+                      decoration: InputDecoration(
-                    decoration: const InputDecoration(
+                        border: OutlineInputBorder(),
-                      border: OutlineInputBorder(),
+                        labelText: 'Minutes Before Sunset',
+                        errorText: _minuteErrorText,
+                      ),
+                      onChanged: (v) {
+                        final val = int.tryParse(v);
+                        setState(() {
+                          if (val != null) {
+                            _minuteErrorText = null;
+                            _minutesBefore = val;
+                          } else {
+                            _minuteErrorText = 'Invalid Minute Value';
+                          }
+                        });
+                      },
                     ),
-                    onChanged: (v) {
+                  ),
-                      final val = int.tryParse(v);
+
-                      if (val != null && val >= 0) {
+                // --- Toggle ---
-                        _minutesBefore = val;
+                Expanded(
-                      } else {
+                  child: SwitchListTile(
-                        _showSnack('Invalid Minute Value');
+                    //title: const Text('Enable Sunset Alarm'),
-                      }
+                    title: Text(_alarmEnabled ? 'Sunset Alarm Enabled' : ''),
-                    },
+                    subtitle: Text(
+                      _alarmEnabled
+                          ? 'Will alert ${_minutesBefore} min before sunset. ($_alarmDisplayTime)'
+                          : '',
+                    ),
+                    value: _alarmEnabled,
+                    onChanged: _toggleAlarm,
                   ),
                 ),
               ],
             ),
-            const SizedBox(height: 24),
-
-            // --- Toggle ---
-            SwitchListTile(
-              title: const Text('Enable Sunset Alarm'),
-              subtitle: Text(
-                _alarmEnabled
-                    ? 'Will alert ${_minutesBefore} min before sunset. ($_alarmDisplayTime)'
-                    : 'Alarm is off',
-              ),
-              value: _alarmEnabled,
-              onChanged: _toggleAlarm,
-            ),
           ],
         ),
       ),