.stylelintrc

{
    "extends": "stylelint-config-standard",
    "plugins": [
        "stylelint-scss"
    ],
    "rules": {
        "indentation": 4,
        "string-quotes": "single",
        "no-duplicate-selectors": true,
        "color-hex-case": "upper",
        "color-hex-length": "long",
        "color-named": "never",
        "declaration-block-trailing-semicolon": "always",
        "declaration-no-important": true,
        "declaration-colon-space-before": "never",
        "declaration-colon-space-after": "always",
        "property-no-vendor-prefix": true,
        "value-no-vendor-prefix": true,
        "number-leading-zero": "never",
        "function-url-quotes": "always",
        "font-weight-notation": "numeric",
        "font-family-name-quotes": "always-where-required",
        "comment-whitespace-inside": "always",
        "at-rule-no-vendor-prefix": true,
        "rule-empty-line-before": "always",
        "media-feature-range-operator-space-before": "always",
        "media-feature-range-operator-space-after": "always",
        "media-feature-parentheses-space-inside": "never",
        "media-feature-name-no-vendor-prefix": true,
        "media-feature-colon-space-before": "never",
        "media-feature-colon-space-after": "always",
        "block-no-empty": null,
        "property-no-unknown": null,
        "at-rule-no-unknown": null,
        "scss/at-rule-no-unknown": true
    }
}