.stylelintrc.json

{
  "extends": "stylelint-config-recommended",
  "rules": {
    "block-closing-brace-empty-line-before": "never",
    "block-closing-brace-newline-after": "always",
    "block-closing-brace-newline-before": "always-multi-line",
    "block-closing-brace-space-after": "always-single-line",
    "block-closing-brace-space-before": "always-single-line",
    "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",
    "length-zero-no-unit": true,
    "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-empty-line-before" : "never",
    "declaration-block-semicolon-newline-after": "always-multi-line",
    "declaration-block-semicolon-newline-before": "never-multi-line",
    "declaration-block-semicolon-space-after": "always-single-line",
    "declaration-block-trailing-semicolon": "always",
    "declaration-block-semicolon-space-before": "never",
    "indentation": [ 2, { "baseIndentLevel": 1 } ],
    "max-empty-lines": 1,
    "number-leading-zero": "always",
    "number-no-trailing-zeros": true,
    "no-eol-whitespace": true,
    "no-empty-first-line": true,
    "rule-empty-line-before": [ "always", { "except": [ "first-nested" ] } ],
    "selector-attribute-brackets-space-inside": "always",
    "selector-attribute-operator-space-after": "never",
    "selector-attribute-operator-space-before": "never",
    "selector-attribute-quotes": "always",
    "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": "single",
    "selector-type-case": "lower",
    "selector-list-comma-newline-after": "always",
    "selector-class-pattern": "^[a-z0-9_]+(-[a-z0-9]+)*$"
  }
}