Krijg mijn buttons niet gelijk kwa grootte.

Ik ben benzig met een site voor iemand te maken maar ik krijg wat ik wil niet voor elkaar. Ik hoop dat iemand hier de oplossing voor me heeft! Het gaat om www.meijerenbarmentlo.nl Ik krijg de buttons in de call to action widget niet gelijk kwa grootte en niet gecentreerd van de pagina. Iemand de oplossing? Dit is de php file van deze widget:

<?php
add_action( 'widgets_init','rambo_site_intro_widget'); 
   function rambo_site_intro_widget() { return   register_widget( 'rambo_site_intro_widget' ); }
/**
 * Adds rambo_sidbar_usefull_page_widget widget.
 */
class rambo_site_intro_widget extends WP_Widget {

	/**
	 * Register widget with WordPress.
	 */
	function __construct() {
		parent::__construct(
			'rambo_site_intro_widget', // Base ID
			__('WBR : Call To Action Top', 'rambo'), // Name
			array( 'description' => __( 'Display the Site Intro Section.', 'rambo' ), ) // Args
		);
	}

	/**
	 * Front-end display of widget.
	 *
	 * @see WP_Widget::widget()
	 *
	 * @param array $args     Widget arguments.
	 * @param array $instance Saved values from database.
	 */
	public function widget( $args, $instance ) {
		echo $args['before_widget'];
		$instance[ 'description' ] = isset($instance[ 'description' ])?$instance[ 'description' ]:'';
		$instance[ 'site_intro_text' ] = isset($instance[ 'site_intro_text' ])?$instance[ 'site_intro_text' ]:'';
		$instance[ 'site_intro_link' ] = isset($instance[ 'site_intro_link' ])?$instance[ 'site_intro_link' ]:'';
		$instance[ 'site_intro_target' ] = isset($instance[ 'site_intro_target' ])?$instance[ 'site_intro_target' ]:'';		
		
		//echo $args['before_widget'];
		if ( ! empty( $title ) )
		echo $args['before_title'] . $title . $args['after_title']; ?>		
		
				
					<div class="span8">		
						<h1><?php echo  $instance[ 'description' ];?></h1>
					</div>
					<div class="span4">
						<?php
						if(($instance['site_intro_link'])!=null){
					
						echo '<a class="purchase_now_btn" href="'.$instance['site_intro_link'].'" '.($instance['site_intro_target']==true?'target="_blank"':'').' >'.$instance['site_intro_text'].'
					    </a>';					    
						}
						?>
					</div>
		<?php
		echo $args['after_widget'];		
		//echo $args['after_widget']; // end of sidbar usefull links widget		
	}

	/**
	 * Back-end widget form.
	 *
	 * @see WP_Widget::form()
	 *
	 * @param array $instance Previously saved values from database.
	 */
		public function form( $instance ) {
			
		
		$instance[ 'description' ] = isset($instance[ 'description' ])?$instance[ 'description' ]:'';	
		$instance[ 'site_intro_link' ] = isset($instance[ 'site_intro_link' ])?$instance[ 'site_intro_link' ]:'';	
		$instance[ 'site_intro_text' ] = isset($instance[ 'site_intro_text' ])?$instance[ 'site_intro_text' ]:'';	
		$instance[ 'site_intro_target' ] = isset($instance[ 'site_intro_target' ])?$instance[ 'site_intro_target' ]:'';	
		?>
		
		
		<h4 for="<?php echo $this->get_field_id( 'description' ); ?>"><?php _e( 'Description','rambo' ); ?></h4>
		<input class="widefat" id="<?php echo $this->get_field_id( 'description' ); ?>" name="<?php echo $this->get_field_name( 'description' ); ?>" type="text" value="<?php if($instance[ 'description' ]) echo esc_attr($instance[ 'description' ]);?>" />
		
		<h4 for="<?php echo $this->get_field_id( 'site_intro_text' ); ?>"><?php _e('Button Text','rambo' ); ?></h4>
		<input class="widefat" id="<?php echo $this->get_field_id( 'site_intro_text' ); ?>" name="<?php echo $this->get_field_name( 'site_intro_text' ); ?>" type="text" value="<?php if($instance[ 'site_intro_text' ]) echo esc_attr($instance[ 'site_intro_text' ]);?>" />
		
		<h4 for="<?php echo $this->get_field_id( 'site_intro_link' ); ?>"><?php _e('Button Link','rambo' ); ?></h4>
		<input class="widefat" id="<?php echo $this->get_field_id( 'site_intro_link' ); ?>" name="<?php echo $this->get_field_name( 'site_intro_link' ); ?>" type="text" value="<?php if($instance[ 'site_intro_link' ]) echo esc_attr($instance[ 'site_intro_link' ]);?>" />
		
		<p>
		<input class="checkbox" type="checkbox" <?php if($instance['site_intro_target']==true){ echo 'checked'; } ?> id="<?php echo $this->get_field_id( 'site_intro_target' ); ?>" name="<?php echo $this->get_field_name( 'site_intro_target' ); ?>" /> 
		<label for="<?php echo $this->get_field_id( 'site_intro_target' ); ?>">
		<?php _e('Open link in new tab','rambo' ); ?></label>
		</p>
		
		
		
		<?php 
	}

	/**
	 * Sanitize widget form values as they are saved.
	 *
	 * @see WP_Widget::update()
	 *
	 * @param array $new_instance Values just sent to be saved.
	 * @param array $old_instance Previously saved values from database.
	 *
	 * @return array Updated safe values to be saved.
	 */
	public function update( $new_instance, $old_instance ) {
		$instance = array();
		
		$instance['description'] = ( ! empty( $new_instance['description'] ) ) ? strip_tags( $new_instance['description'] ) : '';		

		
		$instance['site_intro_text'] = ( ! empty( $new_instance['site_intro_text'] ) ) ? strip_tags( $new_instance['site_intro_text'] ) : '';

		
		$instance['site_intro_link'] = ( ! empty( $new_instance['site_intro_link'] ) ) ? strip_tags( $new_instance['site_intro_link'] ) : '';		
				

		$instance['site_intro_target'] = ( ! empty( $new_instance['site_intro_target'] ) ) ? strip_tags( $new_instance['site_intro_target'] ) : '';		
		
		return $instance;
	}

}
?>