<form role="search" method="get" class="search-form" action="<?php echo home_url( '/' ); ?>">
  <label>
    <span class="screen-reader-text"><?php echo _x( 'Search for:', 'label' ); ?></span>
    <?php if ( doing_action( 'buena_search_form' ) ): ?>
      <input type="search" class="search-field" value="<?php echo get_search_query(); ?>" name="s" title="<?php echo esc_attr_x( 'Search for:', 'label' ); ?>" />
    <?php else: ?>
      <input type="search" class="search-field" placeholder="<?php echo esc_attr_x( 'Search …', 'placeholder' ); ?>" value="<?php echo get_search_query(); ?>" name="s" title="<?php echo esc_attr_x( 'Search for:', 'label' ); ?>" />
    <?php endif; ?>
  </label>
  <button type="submit" class="search-submit" title="<?php esc_attr_e( 'Query search', 'buena-theme' ); ?>"><?php echo esc_html_x( 'Search', 'submit button' ); ?></button>
</form>