.stylelintrc.json

{
  "extends": "stylelint-config-standard",
  "rules": {
      "indentation": 2,
      "string-quotes": "double",
      "no-duplicate-selectors": true,
      "color-hex-case": "upper",
      "color-hex-length": "short",
      "color-named": "never",
      "selector-combinator-space-after": "always",
      "selector-attribute-quotes": "never",
      "selector-attribute-operator-space-before": "never",
      "selector-attribute-operator-space-after": "never",
      "selector-attribute-brackets-space-inside": "never",
      "declaration-block-trailing-semicolon": "always",
      "declaration-no-important": null,
      "declaration-colon-space-before": "never",
      "declaration-colon-space-after": "always",
      "value-no-vendor-prefix": true,
      "number-leading-zero": "never",
      "function-url-quotes": null,
      "font-family-name-quotes": "always-where-recommended",
      "comment-whitespace-inside": "always",
      "at-rule-no-vendor-prefix": null,
      "rule-empty-line-before": ["always", {
        "except": ["first-nested"],
        "ignore": ["after-comment"]
      }],
      "selector-pseudo-element-colon-notation": "single",
      "selector-pseudo-class-parentheses-space-inside": "never",
      "selector-no-vendor-prefix": true,
      "media-feature-range-operator-space-before": "always",
      "media-feature-range-operator-space-after": "always",
      "media-feature-parentheses-space-inside": "never",
      "media-feature-name-no-vendor-prefix": true,
      "media-feature-colon-space-before": "never",
      "media-feature-colon-space-after": "always",
      "block-opening-brace-space-before": "never",
      "at-rule-empty-line-before": null,
      "font-family-no-missing-generic-family-keyword": null,
      "selector-list-comma-newline-after": "always-multi-line",
      "no-empty-source": null
  }
}