userstyles/.stylelintrc.json

{
  "extends": "stylelint-config-recommended",
  "plugins": [
    "stylelint-scss"
  ],
  "rules": {
    "at-rule-no-unknown": [
      true,
      {
        "ignoreAtRules": [
          "include",
          "mixin"
        ]
      }
    ],
    "indentation": 2,
    "string-quotes": "single",
    "no-descending-specificity": null
  }
}