Can you please post a link to your site?
You also should not be updating any of the theme’s CSS files (or any PHP files for that matter). The next time you upgrade/update the theme, your changes will be lost. The theme has a Custom CSS option where you can add your overriding CSS rules by going to Appearance → Customizer → General → Custom CSS. If you need to modify a .PHP file, then you should be using a child theme.
Sorry I did not explain well.
I’m talking about Custom CSS the same are you talking about. I just want to write custom css not from the admin panel, so i was wondering where is located in the ftp folder. In which MesoColumn folder i can find the custom.css? I hope i was more precise.
Anyway suddenly the code is working also media queries I have added in Custom Css.
The website is http://www.alesitiprova.it
Thank you
The custom CSS options for most themes (as well as CSS plugins) are stored as a database option and not as a file, so it would not be possible to FTP changes to it. If you do a view source on your site, you’ll see that the custom CSS gets written as in inline stylesheet just before the close of the head section. Perhaps MesoColumn is different in how it stores its custom CSS, but I wouldn’t think so.