.stylelintrc

{
  "plugins": [
    "stylelint-order"
  ],
  "rules": {
    "at-rule-no-vendor-prefix": true,
    "at-rule-name-case": "lower",
    "at-rule-name-space-after": "always",
    "at-rule-semicolon-newline-after": "always",

    "block-closing-brace-empty-line-before": "never",
    "block-closing-brace-newline-after": "always",
    "block-closing-brace-newline-before": "always-multi-line",
    "block-no-empty": true,
    "block-opening-brace-newline-after": "always-multi-line",
    "block-opening-brace-space-after": "always-single-line",
    "block-opening-brace-space-before": "always",

    "color-hex-case": "lower",
    "color-hex-length": "short",
    "color-no-invalid-hex": true,

    "comment-empty-line-before": "always",
    "comment-no-empty": true,
    "comment-whitespace-inside": "always",

    "declaration-bang-space-after": "never",
    "declaration-bang-space-before": "always",
    "declaration-colon-newline-after": "always-multi-line",
    "declaration-colon-space-after": "always-single-line",
    "declaration-colon-space-before": "never",
    "declaration-block-no-duplicate-properties": [true, {"ignore": ["consecutive-duplicates-with-different-values"]}],
    "declaration-block-no-shorthand-property-overrides": true,
    "declaration-block-semicolon-newline-after": "always-multi-line",
    "declaration-block-semicolon-space-after": "always-single-line",
    "declaration-block-semicolon-space-before": "never",
    "declaration-block-single-line-max-declarations": 1,
    "declaration-block-trailing-semicolon": "always",

    "function-calc-no-unspaced-operator": true,
    "function-comma-newline-after": "always-multi-line",
    "function-comma-newline-before": "never-multi-line",
    "function-comma-space-after": "always-single-line",
    "function-comma-space-before": "never",
    "function-max-empty-lines": 0,
    "function-parentheses-newline-inside": "always-multi-line",
    "function-parentheses-space-inside": "never-single-line",
    "function-url-quotes": "always",
    "function-whitespace-after": "always",

    "indentation": 4,

    "length-zero-no-unit": true,

    "max-empty-lines": 2,
    "max-line-length": [ 120, {"ignore": "non-comments"} ],
    "max-nesting-depth": 6,

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

    "media-query-list-comma-newline-after": "always-multi-line",
    "media-query-list-comma-space-after": "always-single-line",
    "media-query-list-comma-space-before": "never",

    "no-empty-source": true,
    "no-eol-whitespace": true,
    "no-extra-semicolons": true,
    "no-missing-end-of-source-newline": true,

    "number-leading-zero": "never",
    "number-max-precision": 3,
    "number-no-trailing-zeros": true,

    "order/properties-order": [
      {
        "order": "strict",
        "emptyLineBefore": "always",
        "properties": [
          "content"
        ]
      }, {
        "order": "flexible",
        "emptyLineBefore": "always",
        "properties": [
          "background",
          "background-color",
          "color",
          "fill",
          "filter",
          "font",
          "font-family",
          "font-size",
          "font-style",
          "font-weight",
          "letter",
          "letter-spacing",
          "line-height",
          "text",
          "text-align",
          "text-decoration",
          "text-transform",
          "white-space",
          "word"
        ]
      }, {
        "order": "flexible",
        "emptyLineBefore": "always",
        "properties": [
          "border",
          "border-top",
          "border-left",
          "border-bottom",
          "border-right",
          "border-radius",
          "box-sizing",
          "display",
          "height",
          "margin",
          "margin-top",
          "margin-left",
          "margin-bottom",
          "margin-right",
          "max-height",
          "max-width",
          "min-height",
          "min-width",
          "outline",
          "overflow",
          "padding",
          "padding-top",
          "padding-left",
          "padding-bottom",
          "padding-right",
          "vertical-align",
          "visibility",
          "width"
        ]
      }, {
        "order": "flexible",
        "properties": [
          "align-items",
          "align-self",
          "flex",
          "flex-direction",
          "flex-shrink",
          "flex-grow",
          "justify-content"
        ]
      }, {
        "order": "flexible",
        "emptyLineBefore": "always",
        "properties": [
          "bottom",
          "float",
          "left",
          "position",
          "right",
          "top",
          "z-index"
        ]
      }, {
        "order": "flexible",
        "emptyLineBefore": "always",
        "properties": [
          "animation",
          "box-shadow",
          "opacity",
          "transition",
          "transform"
        ]
      }, {
        "order": "flexible",
        "emptyLineBefore": "always",
        "properties": [
          "appearance",
          "list-style",
          "table-style",
          "cursor"
        ]
      }
    ],

    "property-case": "lower",
    "property-no-unknown": [true, {"checkPrefixed": true}],

    "selector-attribute-brackets-space-inside": "never",
    "selector-attribute-quotes": "always",
    "selector-combinator-space-after": "always",
    "selector-combinator-space-before": "always",
    "selector-list-comma-newline-after": "always",
    "selector-list-comma-space-before": "never",
    "selector-max-empty-lines": 0,
    "selector-max-compound-selectors": 6,
    "selector-max-specificity": "1,3,0",
    "selector-pseudo-class-case": "lower",
    "selector-pseudo-class-no-unknown": true,
    "selector-pseudo-class-parentheses-space-inside": "never",
    "selector-pseudo-element-case": "lower",
    "selector-pseudo-element-colon-notation": "double",
    "selector-pseudo-element-no-unknown": true,
    "selector-type-case": "lower",
    "selector-type-no-unknown": true,

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

    "string-no-newline": true,
    "string-quotes": "double",

    "unit-case": "lower",
    "unit-no-unknown": true,

    "value-list-comma-newline-after": "always-multi-line",
    "value-list-comma-space-after": "always-single-line",
    "value-list-comma-space-before": "never",
    "value-list-max-empty-lines": 0
  }
}