Looking good. A few questions about the toolchain:
What do you use PostCSS for?
How are the the scss files actually compiled?
What do you use PostCSS for?
How are the the scss files actually compiled?
The scss files are compiled by webpack to normal css at build time using sass loader, I used vue-cli to automate the webpack configuration https://cli.vuejs.org/ process
Oh and the poss css file is just a leftover config file for a package that i decided not to use ( Ant Design )