diff --git a/lib/ui/teacher_student_management_page.dart b/lib/ui/teacher_student_management_page.dart
index bccdd5f..9ae1e2a 100644
--- a/lib/ui/teacher_student_management_page.dart
+++ b/lib/ui/teacher_student_management_page.dart
@@ -417,90 +417,100 @@ class _TeacherStudentManagementPageState
                 const SizedBox(height: 16),
 
                 // 📝 학생 추가 컨테이너 폼
-                Container(
-                  padding: const EdgeInsets.all(20),
-                  decoration: BoxDecoration(
-                    color: Colors.white,
-                    borderRadius: BorderRadius.circular(24),
-                    boxShadow: [
-                      BoxShadow(
-                        color: Colors.black.withValues(alpha: 0.04),
-                        blurRadius: 16,
+                // 🖥️ 웹 넓은 화면에서 폼이 지나치게 길어지지 않도록 현재 폭의 2/3로 제한한다.
+                LayoutBuilder(
+                  builder: (context, constraints) {
+                    return ConstrainedBox(
+                      constraints: BoxConstraints(
+                        maxWidth: constraints.maxWidth * 2 / 3,
                       ),
-                    ],
-                  ),
-                  child: Column(
-                    children: [
-                      TextField(
-                        controller: _addIdController,
-                        keyboardType: TextInputType.number,
-                        decoration: const InputDecoration(
-                          labelText: '학번',
-                          prefixIcon: Icon(Icons.badge),
-                        ),
-                      ),
-                      const SizedBox(height: 12),
-                      TextField(
-                        controller: _addNameController,
-                        decoration: const InputDecoration(
-                          labelText: '이름',
-                          prefixIcon: Icon(Icons.person),
-                        ),
-                      ),
-                      const SizedBox(height: 12),
-                      TextField(
-                        controller: _addPwController,
-                        obscureText: true,
-                        decoration: const InputDecoration(
-                          labelText: '초기 비밀번호',
-                          prefixIcon: Icon(Icons.lock),
-                        ),
-                      ),
-                      const SizedBox(height: 12),
-                      DropdownButtonFormField<int>(
-                        initialValue: _selectedGrade,
-                        decoration: const InputDecoration(
-                          labelText: '학년 (선택)',
-                          prefixIcon: Icon(Icons.class_),
-                        ),
-                        items: const [
-                          DropdownMenuItem(value: 1, child: Text('1학년')),
-                          DropdownMenuItem(value: 2, child: Text('2학년')),
-                          DropdownMenuItem(value: 3, child: Text('3학년')),
-                        ],
-                        onChanged: (value) =>
-                            setState(() => _selectedGrade = value),
-                      ),
-                      const SizedBox(height: 20),
-                      SizedBox(
-                        width: double.infinity,
-                        height: 50,
-                        child: ElevatedButton(
-                          onPressed: _controller.isWorking
-                              ? null
-                              : _addStudentAccount,
-                          style: ElevatedButton.styleFrom(
-                            backgroundColor: Colors.orange,
-                            foregroundColor: Colors.white,
-                            shape: RoundedRectangleBorder(
-                              borderRadius: BorderRadius.circular(12),
+                      child: Container(
+                        padding: const EdgeInsets.all(20),
+                        decoration: BoxDecoration(
+                          color: Colors.white,
+                          borderRadius: BorderRadius.circular(24),
+                          boxShadow: [
+                            BoxShadow(
+                              color: Colors.black.withValues(alpha: 0.04),
+                              blurRadius: 16,
                             ),
-                          ),
-                          child: _controller.isWorking
-                              ? const CircularProgressIndicator(
-                                  color: Colors.white,
-                                )
-                              : const Text(
-                                  '학생 등록 완료',
-                                  style: TextStyle(
-                                    fontWeight: FontWeight.bold,
-                                    fontSize: 15,
+                          ],
+                        ),
+                        child: Column(
+                          children: [
+                            TextField(
+                              controller: _addIdController,
+                              keyboardType: TextInputType.number,
+                              decoration: const InputDecoration(
+                                labelText: '학번',
+                                prefixIcon: Icon(Icons.badge),
+                              ),
+                            ),
+                            const SizedBox(height: 12),
+                            TextField(
+                              controller: _addNameController,
+                              decoration: const InputDecoration(
+                                labelText: '이름',
+                                prefixIcon: Icon(Icons.person),
+                              ),
+                            ),
+                            const SizedBox(height: 12),
+                            TextField(
+                              controller: _addPwController,
+                              obscureText: true,
+                              decoration: const InputDecoration(
+                                labelText: '초기 비밀번호',
+                                prefixIcon: Icon(Icons.lock),
+                              ),
+                            ),
+                            const SizedBox(height: 12),
+                            DropdownButtonFormField<int>(
+                              initialValue: _selectedGrade,
+                              decoration: const InputDecoration(
+                                labelText: '학년 (선택)',
+                                prefixIcon: Icon(Icons.class_),
+                              ),
+                              items: const [
+                                DropdownMenuItem(value: 1, child: Text('1학년')),
+                                DropdownMenuItem(value: 2, child: Text('2학년')),
+                                DropdownMenuItem(value: 3, child: Text('3학년')),
+                              ],
+                              onChanged: (value) =>
+                                  setState(() => _selectedGrade = value),
+                            ),
+                            const SizedBox(height: 20),
+                            SizedBox(
+                              width: double.infinity,
+                              height: 50,
+                              child: ElevatedButton(
+                                onPressed: _controller.isWorking
+                                    ? null
+                                    : _addStudentAccount,
+                                style: ElevatedButton.styleFrom(
+                                  backgroundColor: Colors.orange,
+                                  foregroundColor: Colors.white,
+                                  shape: RoundedRectangleBorder(
+                                    borderRadius: BorderRadius.circular(12),
                                   ),
                                 ),
+                                child: _controller.isWorking
+                                    ? const CircularProgressIndicator(
+                                        color: Colors.white,
+                                      )
+                                    : const Text(
+                                        '학생 등록 완료',
+                                        style: TextStyle(
+                                          fontWeight: FontWeight.bold,
+                                          fontSize: 15,
+                                        ),
+                                      ),
+                              ),
+                            ),
+                          ],
                         ),
                       ),
-                    ],
-                  ),
+                    );
+                  },
                 ),
                 const SizedBox(height: 36),