function post_loop() {
    ob_start();

    // Query arguments
    $args = array(
        'post_type' => 'post',
        'posts_per_page' => -1,
    );

    $data = new WP_Query($args);
    ?>
    <div class="row">
        <?php if ($data->have_posts()): ?>
            <?php while ($data->have_posts()): $data->the_post(); ?>
                <div class="col-lg-4 col-md-4 col-sm-12 col-xs-12">
                    <div class="main-post">
                        <!-- Featured Image -->
                        <div class="MainImg">
                            <div class="blog-fig">
                                <?php if (has_post_thumbnail()): ?>
                                    <?php the_post_thumbnail('full'); ?>
                                <?php endif; ?>
                            </div>
                        </div>
                        
                        <!-- Post Excerpt -->
                        <div class="blg-content">
                            <div class="blg-ttl">
                                <h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
                            </div>
                            <div class="blg-excerp">
                                <?php echo wp_trim_words(get_the_content(), 40, '...'); ?>
                            </div>
                            <div class="blg-btn">
                                <a href="<?php the_permalink(); ?>">Read More</a>
                            </div>
                        </div>
                    </div>
                </div>
            <?php endwhile; ?>
        <?php else: ?>
            <p>No posts found.</p>
        <?php endif; ?>
    </div>
    <?php

    // Reset Post Data
    wp_reset_postdata();

    return ob_get_clean();
}
add_shortcode('wp_post_data', 'post_loop');