Custom Post Type Slider

cpt-slider.php

<?php 	    
      $slider = new WP_Query(array( 'post_type' => 'project' ) );		
			if( $slider->have_posts() ) : 
	  	while($slider->have_posts()) : 
	  	$slider->the_post();
			?>
      
			<style type="text/css"> 
				.project-box { 
					background-image: url('<?php the_field('featured_image') ?>'); 
				} 
				.project-box:hover {
					background-image: url('<?php the_field('featured_image_hover') ?>'); 
				}
			</style>
			
    	<a class="project-link" href="<?php the_permalink(); ?>" rel="bookmark"><div class="project-box"><span class="tooltiptext"><?php the_title(); ?></span></div></a>
      
			<?php 
				endwhile; 
				endif; 
				wp_reset_query(); 
			?>