How can I set up a custom message when search returns 0 results?

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My code:

<?php

global $searchandfilter;

$atrair_home = $searchandfilter->get(180)->current_query();

    if ((!$atrair_home->is_filtered())&&($atrair_home->get_search_term()=="")) {

        $args = array(
            'post_type' => array(
                'post',
                'ebooks',
                'podcasts',
                'videos'
            ),
            'post_status' => 'publish',
           );
           
          $posts = new WP_Query( $args );
          if( $posts->have_posts() ) :
          ?>
    <?php
                while( $posts->have_posts() ) :
                  $posts->the_post();
                  ?>
        <div class="posts-double">
				<?php if ( has_post_thumbnail()) : // Check if Thumbnail exists ?>
				<a class="thumbnail" href="<?php the_permalink() ?>" rel="bookmark">
					<?php 
										$featured_img_url = get_the_post_thumbnail_url(get_the_ID(),'thumbnail');
										echo '<div class="image" style="background:url('.esc_url($featured_img_url).')"></div>' ?>
					<?php endif; ?>
				</a>
				<div class="content">
					<a class="title" href="<?php the_permalink() ?>" rel="bookmark">
						<?php the_title(); ?>
					</a>
					<p class="descriptions">
						<?php echo wp_trim_words( get_the_content(), 15, '...' );?>
					</p>
					<div class="related-post-category">
						<?php the_tags(); 
								$post_type = get_post_type(get_the_ID());
								$post_name = get_post_type_object(get_post_type())->labels;
								if ( $post_type != 'post' ) {
									echo '<a href="'.get_post_type_archive_link( $post_type ).'"><span class="'.$post_type.'">'.$post_name->name.'</span></a>';
								};
								?>
					</div>
				</div>
				<div class="posts-footer">
						<div class="related-time">
							<?php echo do_shortcode('[rt_reading_time]'); ?>
						</div>
						<div class="related-bookmark">
							<?php echo do_shortcode('[cbxwpbookmarkbtn]'); ?>
						</div>
					</div>
			</div>
        <?php
                endwhile;
                wp_reset_postdata();
    
          else :
            echo 'Não conseguimos encontrar nenhum resultado...';
          endif;
    
            }

    else
    //Inicio fim
    {

        if ( $query->have_posts() )
        {
            ?>
            
            Found <?php echo $query->found_posts; ?> Results<br />
            <div class='search-filter-results-list'>
            <?php
                while ($query->have_posts())
                {
                    $query->the_post();
                    
                    ?>
                            <div class="posts-double">
                        <?php if ( has_post_thumbnail()) : // Check if Thumbnail exists ?>
                        <a class="thumbnail" href="<?php the_permalink() ?>" rel="bookmark">
                            <?php 
                                                $featured_img_url = get_the_post_thumbnail_url(get_the_ID(),'thumbnail');
                                                echo '<div class="image" style="background:url('.esc_url($featured_img_url).')"></div>' ?>
                            <?php endif; ?>
                        </a>
                        <div class="content">
                            <a class="title" href="<?php the_permalink() ?>" rel="bookmark">
                                <?php the_title(); ?>
                            </a>
                            <p class="descriptions">
                                <?php echo wp_trim_words( get_the_content(), 15, '...' );?>
                            </p>
                            <div class="related-post-category">
                                <?php the_tags(); 
                                        $post_type = get_post_type(get_the_ID());
                                        $post_name = get_post_type_object(get_post_type())->labels;
                                        if ( $post_type != 'post' ) {
                                            echo '<a href="'.get_post_type_archive_link( $post_type ).'"><span class="'.$post_type.'">'.$post_name->name.'</span></a>';
                                        };
                                        ?>
                            </div>
                        </div>
                        <div class="posts-footer">
                                <div class="related-time">
                                    <?php echo do_shortcode('[rt_reading_time]'); ?>
                                </div>
                                <div class="related-bookmark">
                                    <?php echo do_shortcode('[cbxwpbookmarkbtn]'); ?>
                                </div>
                            </div>
                    </div>
            
                            <?php
                            
            
                }
            ?>
            </div>
        <?php
        }
        else
        {
            ?>
            <div class='search-filter-results-list' data-search-filter-action='infinite-scroll-end'>
                <span>End of Results</span>
            </div>
            <?php
        }
    }
        ?>