style.css

/*
Theme Name: Reponsive Blog
Theme URI: http://localhost:3000;
Author: Amy Kang
Author URI: http://amy-kang.com;
Description: A simple responsive WordPress blog
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: responsive-blog

*/

body {
  background: #F1F1E9;
}

div.main-container img {
  width: 100%;
  height: 200px;
}