Can not create child theme

In fact, I did create both ways – manually and with a plugin, but style.css was not working.

Also I noticed that bootstrap.css styles are overriding styles from the theme (not child theme) so this causes OLs in my posts to be font-size:14px, while other texts were 16px on the same page.

Of course we can add body {font-size:16px !important;} in style.css for example, but I don’t like the idea to deal with this kind of problems every now and then in the future.

I was going to buy this theme as it really corresponds to the designs I have for my current project but now I am searching for another theme.