style.css

/*
Theme Name: Flat
Theme URI: https://themeisle.com/themes/flat/
Author: ThemeIsle
Author URI: https://themeisle.com
Description: Flat is a free Blog Theme designed by YoArts. Works nice for a personal blog, magazine ,news or review website.
Version: 1.7.11
WordPress Available:  yes
Requires License:    no
License: GNU General Public License v3 or later
License URI: http://www.gnu.org/licenses/gpl-3.0.html
Text Domain: flat
Tags: two-columns, left-sidebar, custom-background, custom-colors, custom-menu, editor-style, post-formats, custom-colors, translation-ready,featured-images, threaded-comments, translation-ready

This theme, like WordPress, is licensed under the GPL.
Use it to make something cool, have fun, and share what you've learned with others.
*/

.sticky {}
.bypostauthor {}