How to add a class in yii form button submit

This is a code for a form. I want to add a class for submit button and add a inline style for all text fields. How can I do this one?

for example in view source look like this I want to edit like this

<div class="form">
<?php $form=$this->beginWidget('CActiveForm', array(
    'id'=>'login-form',
    'enableClientValidation'=>true,
    'clientOptions'=>array(
        'validateOnSubmit'=>true,
    ),
)); ?>

    <p class="note">Fields with <span class="required">*</span> are required.</p>

    <div class="row">
        <?php echo $form->labelEx($model,'username'); ?>
        <?php echo $form->textField($model,'username'); ?>
        <?php echo $form->error($model,'username'); ?>
    </div>

    <div class="row">
        <?php echo $form->labelEx($model,'password'); ?>
        <?php echo $form->passwordField($model,'password'); ?>
        <?php echo $form->error($model,'password'); ?>
        <p class="hint">
            Hint: You may login with <kbd>demo</kbd>/<kbd>demo</kbd> or <kbd>admin</kbd>/<kbd>admin</kbd>.
        </p>
    </div>

    <div class="row rememberMe">
        <?php echo $form->checkBox($model,'rememberMe'); ?>
        <?php echo $form->label($model,'rememberMe'); ?>
        <?php echo $form->error($model,'rememberMe'); ?>
    </div>

    <div class="row buttons">
        <?php echo CHtml::submitButton('Login'); ?>
    </div>

<?php $this->endWidget(); ?>
</div><!-- form -->