.stylelintrc

## .stylelintrc
{
    "rules": {
        "color-hex-case": "lower",
        "color-hex-length": "long",
        "color-named": "never",
        "color-no-invalid-hex": true,
        "font-family-name-quotes": "always-where-required",
        "font-weight-notation": "numeric",
        "function-linear-gradient-no-nonstandard-direction": true,
        "function-name-case": "lower",
        "function-url-data-uris": "never",
        "number-leading-zero": "never",
        "number-no-trailing-zeros": true,
        "string-no-newline": true,
        "string-quotes": "double",
        "length-zero-no-unit": true,
        "unit-case": "lower",
        "unit-no-unknown": true,
        "value-keyword-case": "lower",
        "value-no-vendor-prefix": true,
        "shorthand-property-no-redundant-values": true,
        "property-case": "lower",
        "property-no-unknown": true,
        "property-no-vendor-prefix": true,
        "declaration-block-no-duplicate-properties": true,
        "declaration-block-no-shorthand-property-overrides": true,
        "declaration-block-single-line-max-declarations": 1,
        "declaration-block-trailing-semicolon": "always",
        "block-no-empty": true,
        "selector-attribute-brackets-space-inside": "never",
        "selector-attribute-operator-space-after": "never",
        "selector-attribute-operator-space-before": "never",
        "selector-attribute-quotes": "always",
        "selector-class-pattern": ["^[a-z]([a-z0-9]){1,3}-[A-Z][a-zA-Z0-9]+(_[A-Z][a-zA-Z0-9]+)?(-([a-z0-9-]+)?[a-z0-9])?$", { "resolveNestedSelectors": true }],
        "selector-combinator-space-after": "always",
        "selector-combinator-space-before": "always",
        "selector-max-compound-selectors": 3,
        "selector-max-specificity": "0,3,0",
        "selector-no-id": true,
        "selector-no-qualifying-type": true,
        "selector-no-type": true,
        "selector-no-universal": true,
        "selector-no-vendor-prefix": true,
        "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": "single",
        "selector-pseudo-element-no-unknown": true,
        "media-feature-name-case": "lower",
        "media-feature-name-no-vendor-prefix": true,
        "media-feature-parentheses-space-inside": "never",
        "media-feature-range-operator-space-after": "always",
        "media-feature-range-operator-space-before": "always",
        "at-rule-no-unknown": [true, {"ignoreAtRules": ["mixin"]}],
        "at-rule-no-vendor-prefix": true,
        "at-rule-semicolon-newline-after": "always",
        "at-rule-name-space-after": "always",
        "comment-no-empty": true,
        "no-duplicate-selectors": true,
        "no-empty-source": true,
        "no-extra-semicolons": true,
        "no-invalid-double-slash-comments": true
    }
}