.stylelintrc.json

{
  "extends": "stylelint-config-standard",
  "rules": {
    "at-rule-empty-line-before": null,
    "at-rule-no-unknown": [
      true, {
        "ignoreAtRules": ["if", "else", "mixin", "include", "content", "for"]
      }
    ],
    "indentation": 2,
    "string-quotes": "double",
    "color-hex-case": "lower",
    "color-hex-length": "short",
    "color-named": "never",
    "selector-combinator-space-after": "always",
    "selector-attribute-quotes": "always",
    "selector-attribute-operator-space-before": "always",
    "selector-attribute-operator-space-after": "always",
    "selector-attribute-brackets-space-inside": "never",
    "declaration-block-trailing-semicolon": "always",
    "declaration-colon-space-before": "never",
    "declaration-colon-space-after": "always",
    "function-url-quotes": "always",
    "font-weight-notation": "numeric",
    "font-family-name-quotes": "always-where-recommended",
    "comment-whitespace-inside": "always",
    "comment-empty-line-before": "always",
    "selector-pseudo-element-colon-notation": "double",
    "selector-pseudo-class-parentheses-space-inside": "never",
    "max-nesting-depth": 4,
    "media-feature-range-operator-space-before": "always",
    "media-feature-range-operator-space-after": "always",
    "media-feature-parentheses-space-inside": "never",
    "media-feature-colon-space-before": "never",
    "media-feature-colon-space-after": "always",
    "no-missing-end-of-source-newline": null,
    "no-duplicate-selectors": true,
    "selector-max-specificity": "0,4,0",
    "unit-whitelist": ["em", "rems", "px", "fr", "%", "vh", "vw", "vmin", "vmax"]
  }
}