style.css

/*
Theme Name: Void Canvas
Theme URI: https://github.com/arobd/blank-wordpress-theme
Author: Arafat Rahman
Author URI: https://arafatbd.net/
Description: A WordPress Theme which doesn't show any content in the frontend and is completely blank. Since the Backend (exampledomain.de/wp-content) is still available, you can use this WordPress Theme as headless CMS for any Javascript Framework you like (i.e. via RestAPI). Enjoy!
Version: 1.0.1
License: GNU General Public License v3 or later
License URI: https://www.gnu.org/licenses/gpl-3.0.html
Tags: featured-images, theme-options,
Text Domain: void-canvas
Requires at least: 4.6
Tested up to: 6.3
Requires PHP: 5.6
*/

body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin-top: 50px;
  background-color: #f0f0f0;
  color: #333;
}
.container {
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  display: inline-block;
}