[Theme Esplanade] Full width search results

Hi there!

I recently started to use wordpress for creating my website.
Now I have a problem which I couldn´t solve yet.
If I perform a search on my website, the results page is not full width
as I want it to be.
Within the Theme templates there was no search.php, so I set up one on my own. But even with an extensive google search and a search within this forum I couldn´t find an answer which helped me with that.

I would really be happy if u could help me with this problem and just let me know which further information you need.

Here is the search.php:
(as u see I already kicked out the sidebar command in the end of this file)

<?php get_header(); ?>

        <div id="container">
            <div id="content">

<?php if ( have_posts() ) : ?>

                <h1 class="page-title"><?php _e( 'Suchergebnisse für: ', 'Esplanade' ); ?><span><?php the_search_query(); ?></span></h1>

<?php global $wp_query; $total_pages = $wp_query->max_num_pages; if ( $total_pages > 1 ) { ?>
                <div id="nav-above" class="navigation">
                    <div class="nav-previous"><?php next_posts_link(__( '<span class="meta-nav">«</span> Older posts', 'Esplanade' )) ?></div>
                    <div class="nav-next"><?php previous_posts_link(__( 'Newer posts <span class="meta-nav">»</span>', 'Esplanade' )) ?></div>
                </div><!-- #nav-above -->
<?php } ?>                           

<?php while ( have_posts() ) : the_post() ?>

                <div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
                    <h2 class="entry-title"><a href="<?php the_permalink(); ?>" title="<?php printf( __('Permalink to %s', 'your-theme'), the_title_attribute('echo=0') ); ?>" rel="bookmark"><?php the_title(); ?></a></h2>

<?php if ( $post->post_type == 'post' ) { ?>
                    <div class="entry-meta">
                        <span class="meta-prep meta-prep-author"><?php _e('By ', 'Esplanade'); ?></span>
                        <span class="author vcard"><a class="url fn n" href="<?php echo get_author_link( false, $authordata->ID, $authordata->user_nicename ); ?>" title="<?php printf( __( 'View all posts by %s', 'your-theme' ), $authordata->display_name ); ?>"><?php the_author(); ?></a></span>
                        <span class="meta-sep"> | </span>
                        <span class="meta-prep meta-prep-entry-date"><?php _e('Published ', 'your-theme'); ?></span>
                        <span class="entry-date"><abbr class="published" title="<?php the_time('Y-m-d\TH:i:sO') ?>"><?php the_time( get_option( 'date_format' ) ); ?></abbr></span>
                        <?php edit_post_link( __( 'Edit', 'your-theme' ), "<span class=\"meta-sep\">|</span>\n\t\t\t\t\t\t<span class=\"edit-link\">", "</span>\n\t\t\t\t\t" ) ?>
                    </div><!-- .entry-meta -->
<?php } ?>

                    <div class="entry-summary">
<?php the_excerpt( __( 'Continue reading <span class="meta-nav">»</span>', 'Esplanade' )  ); ?>
<?php wp_link_pages('before=<div class="page-link">' . __( 'Pages:', 'Esplanade' ) . '&after=</div>') ?>
                    </div><!-- .entry-summary -->

<?php if ( $post->post_type == 'post' ) { ?>
                    <div class="entry-utility">
                        <span class="cat-links"><span class="entry-utility-prep entry-utility-prep-cat-links"><?php _e( 'Posted in ', 'Esplanade' ); ?></span><?php echo get_the_category_list(', '); ?></span>
                        <span class="meta-sep"> | </span>
                        <?php the_tags( '<span class="tag-links"><span class="entry-utility-prep entry-utility-prep-tag-links">' . __('Tagged ', 'Esplanade' ) . '</span>', ", ", "</span>\n\t\t\t\t\t\t<span class=\"meta-sep\">|</span>\n" ) ?>
                        <span class="comments-link"><?php comments_popup_link( __( 'Leave a comment', 'Esplanade' ), __( '1 Comment', 'Esplanade' ), __( '% Comments', 'Esplanadee' ) ) ?></span>
                        <?php edit_post_link( __( 'Edit', 'Esplanade' ), "<span class=\"meta-sep\">|</span>\n\t\t\t\t\t\t<span class=\"edit-link\">", "</span>\n\t\t\t\t\t\n" ) ?>
                    </div><!-- #entry-utility -->
<?php } ?>
                </div><!-- #post-<?php the_ID(); ?> -->

<?php endwhile; ?>

<?php global $wp_query; $total_pages = $wp_query->max_num_pages; if ( $total_pages > 1 ) { ?>
                <div id="nav-below" class="navigation">
                    <div class="nav-previous"><?php next_posts_link(__( '<span class="meta-nav">«</span> Older posts', 'Esplanade' )) ?></div>
                    <div class="nav-next"><?php previous_posts_link(__( 'Newer posts <span class="meta-nav">»</span>', 'Esplanade' )) ?></div>
                </div><!-- #nav-below -->
<?php } ?>           

<?php else : ?>

                <div id="post-0" class="post no-results not-found">
                    <h2 class="entry-title"><?php _e( 'Leider ergabe Ihre Suchanfrage keinen Treffer', 'Esplanade' ) ?></h2>
                    <div class="entry-content">
                        <p><?php _e( 'Versuchen Sie es doch hier gleich nocheinmal!', 'Esplanade' ); ?></p>
    <?php get_search_form(); ?>
                    </div><!-- .entry-content -->
                </div>

<?php endif; ?>

</div><!-- #content -->
        </div><!-- #container -->

<?php get_footer(); ?>

Thank u in advance
Pandabaer