Create a child theme for WordPress

style.css

/*
Theme Name:     {Child Theme name}
Theme URI:      http: //www.example.com
Description:    Child theme for {Parent theme name}
Author:         {Author}
Author URI:     http://www.example.com
Template:       {name of the folder of the parent theme
Version:        {version number}
*/

/*
 * Imports the style.css of the parent theme
 * ***********************************************************************/
@import url("../parent-theme-name-folder/style.css");