.stylelintrc.json

{
  "extends": [
    "stylelint-config-standard-scss"
  ],
  "ignoreFiles": [
    "**/_variables.scss"
  ],
  "plugins": [
    "stylelint-declaration-strict-value"
  ],
  "rules": {
    "font-family-name-quotes": "always-unless-keyword",

    "value-keyword-case": "lower",
    "value-no-vendor-prefix": true,

    "block-opening-brace-newline-after": "always",

    "selector-class-pattern": "^([a-z][a-z0-9]*)((-|--|_|__)[a-z0-9]+)*$",
    "selector-attribute-quotes": "always",
    "selector-max-id": 0,
    "selector-no-vendor-prefix": true,
    "selector-pseudo-element-colon-notation": "single",
    "no-duplicate-selectors": true,
    "selector-max-specificity": "1,3,1",

    "scss/no-global-function-names": null,

    "no-extra-semicolons": true,
    "scss/dollar-variable-pattern": "^([a-z][a-z0-9]*)((-|--|_|__)[a-z0-9]+)*$",
    "declaration-colon-newline-after": null,
    "scss/at-extend-no-missing-placeholder": null,
    "alpha-value-notation": null,
    "color-function-notation": null,

    "at-rule-empty-line-before": [ "always", {
      "except": ["first-nested"],
      "ignore": [
        "blockless-after-blockless",
        "after-comment"
      ]
    }],
    "at-rule-no-unknown": [ true, {
      "ignoreAtRules": [
        "extend",
        "include",
        "mixin"
      ]
    }],

    "indentation": 4,
    "max-nesting-depth": 2,

    "scale-unlimited/declaration-strict-value": ["/color/", {
      "ignoreKeywords": ["inherit", "transparent"]
    }],

    "declaration-empty-line-before": null
  }
}