if ( ! defined( 'ABSPATH' ) ) {
  exit;
}
get_header();
<div class="front-page">
    <header>
        get_template_part('template-parts/content','header');
    </header>
    <main>
        while ( have_posts() ) :
        the_post();
        the_content(); 
        endwhile;
    </main>
    <footer>
        get_template_part('template-parts/content','footer');
    </footer>
</div>
get_footer()

/*
Theme Name: Mon Thème Minimal
Theme URI: https://example.com
Author: Ton Agence
Author URI: https://example.com
Description: Thème WordPress minimal pour démarrage rapide.
Version: 1.0.0
License: GNU General Public License v2 or later
Text Domain: mon-theme-minimal
*/

/* Reset très basique */
body {
    margin: 0;
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.5;
    color: #222;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px;
    background-color: pink;
}

define("WEBSITE_VERSION", '1.0.0');

function monsite_setup() {
   add_theme_support('title-tag');
   add_theme_support('post-thumbnails');
   add_theme_support('html5', [
        'search-form',
        'comment-form',
        'comment-list',
        'gallery',
        'caption',
    ]);
}
add_action('after_setup_theme', 'monsite_setup');

function monsite_enqueue_assets() {
    wp_enqueue_style(
        'main-style',
        get_stylesheet_directory_uri() . "/assets/style/css/main.css",
        [],
        WEBSITE_VERSION
    );

    wp_enqueue_script(
        'main-js',
        get_stylesheet_directory_uri() . "/assets/js/main.js",
        ["jquery"],
        WEBSITE_VERSION,
        true
    );
}
add_action('wp_enqueue_scripts', 'monsite_enqueue_assets');