stylelint.json

{
  "extends": [
    "stylelint-config-standard"
  ],
  "rules": {
    "color-hex-case": "lower",
    "color-no-invalid-hex": true,

    "function-calc-no-unspaced-operator": true,
    "function-comma-space-after": "always-single-line",
    "function-comma-space-before": "never",
    "function-name-case": "lower",
    "function-url-quotes": "always",
    "function-whitespace-after": "always",

    "number-leading-zero": "always",
    "number-no-trailing-zeros": true,
    "length-zero-no-unit": true,

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

    "unit-case": "lower",
    "unit-no-unknown": true,
    "unit-whitelist": ["px", "%", "deg", "ms", "em"],

    "value-list-comma-space-after": "always-single-line",
    "value-list-comma-space-before": "never",

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

    "property-case": "lower",

    "declaration-block-no-duplicate-properties": true,
    "declaration-block-no-ignored-properties": true,
    "declaration-block-trailing-semicolon": "always",
    "declaration-block-single-line-max-declarations": 1,
    "declaration-block-semicolon-space-before": "never",
    "declaration-block-semicolon-space-after": "always-single-line",
    "declaration-block-semicolon-newline-before": "never-multi-line",
    "declaration-block-semicolon-newline-after": "always-multi-line",

    "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-before": "always-multi-line",

    "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-pseudo-class-case": "lower",
    "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-no-unknown": null,
    "selector-type-case": "lower",
    "selector-no-id": true,

    "declaration-empty-line-before": null,
    "declaration-block-properties-order": [
      {
        "properties": [
          "content"
        ]
      }, {
        "properties": [
          "position",
          "z-index",
          "top",
          "right",
          "bottom",
          "left"
        ]
      }, {
        "properties": [
          "opacity",
          "display",
          "overflow",
          "box-sizing",
          "flex",
          "flex-basis",
          "flex-direction",
          "flex-flow",
          "flex-grow",
          "flex-shrink",
          "flex-wrap",
          "align-self",
          "align-items",
          "align-content",
          "justify-content",
          "order",
          "width",
          "height",
          "min-width",
          "min-height",
          "max-width",
          "max-height",
          "padding",
          "padding-top",
          "padding-right",
          "padding-bottom",
          "padding-left",
          "margin",
          "margin-top",
          "margin-right",
          "margin-bottom",
          "margin-left",
          "border-radius",
          "border",
          "border-top",
          "border-right",
          "border-bottom",
          "border-left"
        ]
      }, {
        "properties": [
          "cursor",
          "pointer-events",
          "color",
          "font-size",
          "font-style",
          "font-weight",
          "font-family",
          "line-height",
          "text-align",
          "text-shadow",
          "box-shadow",
          "background",
          "background-size",
          "background-color",
          "background-image",
          "background-repeat",
          "background-position",
          "background-attachment"
        ]
      }, {
        "properties": [
          "filter",
          "animation",
          "animation-name",
          "animation-delay",
          "animation-duration",
          "animation-direction",
          "animation-fill-mode",
          "animation-play-state",
          "animation-iteration-count",
          "animation-timing-function",
          "transform",
          "transform-style",
          "transform-origin",
          "transition",
          "transition-delay",
          "transition-duration",
          "transition-property",
          "transition-timing-function"
        ]
      }
    ]
  }
}