Please refer to these notes in style.css
/***
* Rename /css/custom-sample.css to /css/custom.css and uncomment the following line to load your own
* custom styles without modifying the originals (this will preserve your changes across theme updates)
*
* @import url(css/custom.css);
*/
/***
* NOTE: If you rename /css/site-wide-sample.css to /css/site-wide.css you can apply CSS styles to any
* theme that is in use across your whole site. This includes any blog or member theme. You do not
* need to add an @import declaration in this file, it will load automaticaly.
*/
