.stylelintrc

{
  "plugins": [
    "stylelint-declaration-strict-value"
  ],
  "extends": "stylelint-config-recommended-scss",
  "rules": {
    "declaration-no-important": true,
    "declaration-block-single-line-max-declarations": 1,
    "declaration-bang-space-after": "never",
    "declaration-bang-space-before": "always",
    "declaration-colon-space-after": "always",
    "declaration-colon-space-before": "never",
    "declaration-block-semicolon-newline-after": "always",
    "declaration-block-semicolon-newline-before": "never-multi-line",
    "declaration-block-semicolon-space-before": "never",
    "declaration-block-trailing-semicolon": "always",
    "declaration-property-value-disallowed-list": [
      {"/^[^$].*/": ["/#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}|[A-Fa-f0-9]{4}|[A-Fa-f0-9]{8})/", "/\\srgba\\((\\s?\\d,)/"]},
      {"message": "No color literals allowed (declaration-property-value-blacklist)"}
    ],

    "shorthand-property-no-redundant-values": true,

    "no-descending-specificity": [
      true,
      {"severity": "warning"}
    ],

    "selector-max-specificity": "0,5,5",
    "selector-max-compound-selectors": 5,
    "selector-max-empty-lines": 0,
    "selector-max-universal": 2,

    "max-nesting-depth": [
      4,
      {"severity": "warning"}
    ],

    "function-comma-space-after": "always-single-line",
    "function-comma-space-before": "never",
    "function-max-empty-lines": 0,
    "function-name-case": "lower",
    "function-parentheses-space-inside": "never-single-line",
    "function-whitespace-after": "always",

    "number-leading-zero": "never",
    "number-no-trailing-zeros": true,

    "string-quotes": "single",

    "unit-case": "lower",

    "value-keyword-case": "lower",
    "value-list-comma-space-after": "always-single-line",
    "value-list-comma-space-before": "never",
    "value-list-max-empty-lines": 0,

    "property-case": "lower",

    "block-closing-brace-empty-line-before": "never",
    "block-closing-brace-newline-after": "always",
    "block-closing-brace-newline-before": "always",
    "block-opening-brace-newline-after": "always",
    "block-opening-brace-space-before": "always",

    "selector-attribute-brackets-space-inside": "never",
    "selector-attribute-operator-space-after": "never",
    "selector-attribute-operator-space-before": "never",
    "selector-combinator-space-after": "always",
    "selector-combinator-space-before": "always",
    "selector-descendant-combinator-no-non-space": true,
    "selector-pseudo-class-case": "lower",
    "selector-pseudo-class-parentheses-space-inside": "never",
    "selector-pseudo-element-case": "lower",
    "selector-pseudo-element-colon-notation": "double",
    "selector-type-case": "lower",
    "selector-list-comma-newline-after": "always",
    "selector-list-comma-newline-before": "never-multi-line",
    "selector-list-comma-space-before": "never",

    "rule-empty-line-before": [
      "always",
      {
        "ignore": [
          "first-nested",
          "after-comment"
        ]
      }
    ],

    "media-feature-colon-space-after": "always",
    "media-feature-colon-space-before": "never",
    "media-feature-name-case": "lower",
    "media-feature-parentheses-space-inside": "never",
    "media-feature-range-operator-space-after": "always",
    "media-feature-range-operator-space-before": "always",

    "color-named": "never",

    "indentation": 2,
    "linebreaks": "unix",
    "max-empty-lines": 3,
    "no-eol-whitespace": true,
    "no-missing-end-of-source-newline": true,

    "scale-unlimited/declaration-strict-value": [
      ["z-index", "font-family"],
      {
        "ignoreKeywords": [
          "inherit",
          "initial",
          "unset",
          "auto"
        ]
      }
    ]
  }
}