hitaboy

This is the at-rule-no-unknown rule provided by vscode's built-in list.

In order to get rid of it you need to do the following:

1. Install stylelint extension code --install-extension stylelint.vscode-stylelint

2. Install stylelint recommended config npm install stylelint-config-recommended --save-dev

3. Add these two lines in your vscode USER SETTINGS