index.php

<?php get_header(); ?>

<?php if (!is_front_page()) { ?>
  <header class="page-header wp-block-group has-global-padding is-layout-constrained">
    <h1 class="headline wp-block-post-title">
      <?php
        if (is_home() && !is_front_page() && single_post_title()) {
          single_post_title();
        } elseif (is_archive()) {
          the_archive_title();
        } elseif (is_search()) {
          echo 'Search Results for "' . esc_html(get_search_query()) . '"';
        }
      ?>
    </h1>
    <?php if (is_archive() && !empty(get_the_archive_description())) { ?>
      <div class="term-description wp-block-group alignfull has-global-padding is-layout-constrained has-gray-wash-background-color">
        <?php the_archive_description(); ?>
      </div>
    <?php } ?>
    <?php
      if (is_search()) {
        ?>
          <form role="search" method="get" action="<?php echo esc_url(home_url()); ?>http://robots.local/" class="wp-block-search__button-outside wp-block-search__text-button wp-block-search">
            <label for="wp-block-search__input-1" class="wp-block-search__label screen-reader-text">Search</label>
            <div class="wp-block-search__inside-wrapper ">
              <input type="search" id="wp-block-search__input-1" class="wp-block-search__input " name="s" value="<?php echo esc_attr(get_search_query()); ?>" placeholder="" required="">
              <button type="submit" class="wp-block-search__button wp-element-button">Search</button>
            </div>
          </form>
        <?php
      }
    ?>
  </header>
<?php } ?>

<div class="posts wp-block-query has-global-padding is-layout-constrained">
  <?php if (have_posts()) { ?>
    <?php
      while (have_posts()) {
        the_post();
        get_template_part('template-parts/loop-index');
      }
      the_posts_pagination();
    ?>
  <?php } else { ?>
    <p><?php _e('No posts match your query.', 'cpt-theme'); ?></p>
  <?php } ?>
</div>

<?php get_footer(); ?>