Hi guys, I followed all the steps of the article by James Ruvalcava ( https://backdropcms.org/news/build-sub-theme-basis-default-frontend-theme-backdrop ) in local I got the results, but when uploading the subtheme to the hostin, I recognized the subtheme, but it does not recognize me the changes of css
PD: sorry for my english
From what you have said, this is probably NOT your problem, but just in case I will share this advice - because I ran into this recently.
If you save any color changes in the theme settings (using color module). Your theme will create new temporary css files. These files will override the main css files until you regenerate them by re-saving the color settings in your theme.
If you have not saved any color changes through the theme user interface, then this is probably not your problem, but it's still worth being aware of. We're trying to find a way to fix this.