rgin: '20px auto', 
          padding: '20px',
          fontFamily: 'Arial, sans-serif'
        },
        children: [
          {
            h1: {
              text: 'Todo List',
              style: { textAlign: 'center', color: '#333', marginBottom: '30px' }
            }
          },
          {
            div: {
              className: 'add-todo',
              style: { display: 'flex', marginBottom: '20px' },
              children: [
                {
                  input: {
                 