I know this question is already asked but was for Ubuntu 18.10.
I have found this question but when i tried to find
/usr/share/gnome-shell/theme/gnome-shell.cssi didn't find anything. so this method is no longer working on the last version of ubuntu.
I am wondering how to install stock Adwaita shell theme on Ubuntu 20.04 with Gnome 3.36?
edit : i have found the solution by extracting
/usr/share/gnome-shell/gnome-shell-theme.gresource using this script i got gnome-shell.css file which i moved to
/usr/share/themes/AnyNameOfYourChoice/gnome-shell/ then changing shell theme using gnome-tweaks
Thank you for your answer