.stylelintrc

{
  "extends": "stylelint-config-standard",
  "rules": {
    "at-rule-no-unknown": [
      true,
      ignoreAtRules: [
        "mixin", "include"
      ]
    ],
    "indentation": 2,
    "string-quotes": "double",
    "no-duplicate-selectors": true,
    "color-hex-case": "upper",
    "color-hex-length": "short",
    "selector-max-id": 0,
    "selector-combinator-space-after": "always",
    "selector-attribute-quotes": "always",
    "selector-type-case": "upper",
    "declaration-block-trailing-semicolon": "always",
    "declaration-no-important": true,
    "declaration-colon-space-before": "never",
    "declaration-colon-space-after": "always-single-line",
    "declaration-colon-newline-after": null,
    "property-no-vendor-prefix": true,
    "value-no-vendor-prefix": true,
    "number-leading-zero": "never",
    "function-url-quotes": "always",
    "font-family-name-quotes": "always-where-required",
    "comment-whitespace-inside": "always",
    "comment-empty-line-before": null,
    "custom-property-empty-line-before": null,
    "at-rule-no-vendor-prefix": true,
    "selector-pseudo-element-colon-notation": "double",
    "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": "always",
    "media-feature-colon-space-before": "never",
    "media-feature-colon-space-after": "always"
  }
}