.stylelintrc.json

{
    "rules": {
        "at-rule-empty-line-before": [
            "always",
            {
                "except": [
                    "blockless-after-same-name-blockless",
                    "first-nested"
                ],
                "ignore": ["after-comment"],
                "severity": "warning"
            }
        ],
        "at-rule-name-case": ["lower", { "severity": "warning" }],
        "at-rule-name-space-after": [
            "always-single-line",
            { "severity": "warning" }
        ],
        "at-rule-semicolon-newline-after": [
            "always",
            { "severity": "warning" }
        ],
        "block-no-empty": true,
        "block-closing-brace-empty-line-before": [
            "never",
            { "severity": "warning" }
        ],
        "block-closing-brace-newline-after": [
            "always",
            { "severity": "warning" }
        ],
        "block-closing-brace-newline-before": [
            "always-multi-line",
            { "severity": "warning" }
        ],
        "block-closing-brace-space-before": [
            "always-single-line",
            { "severity": "warning" }
        ],
        "block-opening-brace-newline-after": [
            "always-multi-line",
            { "severity": "warning" }
        ],
        "block-opening-brace-space-after": [
            "always-single-line",
            { "severity": "warning" }
        ],
        "block-opening-brace-space-before": [
            "always",
            { "severity": "warning" }
        ],
        "color-no-invalid-hex": true,
        "color-hex-case": ["lower", { "severity": "warning" }],
        "color-hex-length": ["short", { "severity": "warning" }],
        "comment-no-empty": true,
        "comment-empty-line-before": [
            "always",
            {
                "except": ["first-nested"],
                "ignore": ["stylelint-commands"],
                "severity": "warning"
            }
        ],
        "comment-whitespace-inside": ["always", { "severity": "warning" }],
        "custom-property-empty-line-before": [
            "always",
            {
                "except": ["after-custom-property", "first-nested"],
                "ignore": ["after-comment", "inside-single-line-block"],
                "severity": "warning"
            }
        ],
        "declaration-block-no-duplicate-properties": [
            true,
            { "severity": "warning" }
        ],
        "declaration-block-no-shorthand-property-overrides": true,
        "declaration-bang-space-after": ["never", { "severity": "warning" }],
        "declaration-bang-space-before": ["always", { "severity": "warning" }],
        "declaration-block-semicolon-newline-after": [
            "always-multi-line",
            { "severity": "warning" }
        ],
        "declaration-block-semicolon-space-after": [
            "always-single-line",
            { "severity": "warning" }
        ],
        "declaration-block-semicolon-space-before": [
            "never",
            { "severity": "warning" }
        ],
        "declaration-block-single-line-max-declarations": [
            1,
            { "severity": "warning" }
        ],
        "declaration-block-trailing-semicolon": [
            "always",
            { "severity": "warning" }
        ],
        "declaration-colon-newline-after": [
            "always-multi-line",
            { "severity": "warning" }
        ],
        "declaration-colon-space-after": [
            "always-single-line",
            { "severity": "warning" }
        ],
        "declaration-colon-space-before": ["never", { "severity": "warning" }],
        "declaration-empty-line-before": [
            "always",
            {
                "except": ["after-declaration", "first-nested"],
                "ignore": ["after-comment", "inside-single-line-block"],
                "severity": "warning"
            }
        ],
        "font-family-no-duplicate-names": true,
        "font-family-no-missing-generic-family-keyword": [
            true,
            { "severity": "warning" }
        ],
        "function-calc-no-unspaced-operator": [true, { "severity": "warning" }],
        "function-linear-gradient-no-nonstandard-direction": true,
        "function-comma-newline-after": [
            "always-multi-line",
            { "severity": "warning" }
        ],
        "function-comma-space-after": [
            "always-single-line",
            { "severity": "warning" }
        ],
        "function-comma-space-before": ["never", { "severity": "warning" }],
        "function-max-empty-lines": [0, { "severity": "warning" }],
        "function-name-case": ["lower", { "severity": "warning" }],
        "function-parentheses-newline-inside": [
            "always-multi-line",
            { "severity": "warning" }
        ],
        "function-parentheses-space-inside": [
            "never-single-line",
            { "severity": "warning" }
        ],
        "function-whitespace-after": ["always", { "severity": "warning" }],
        "keyframe-declaration-no-important": [true, { "severity": "warning" }],
        "length-zero-no-unit": [true, { "severity": "warning" }],
        "max-empty-lines": [1, { "severity": "warning" }],
        "media-feature-name-no-unknown": true,
        "media-feature-colon-space-after": [
            "always",
            { "severity": "warning" }
        ],
        "media-feature-colon-space-before": [
            "never",
            { "severity": "warning" }
        ],
        "media-feature-name-case": ["lower", { "severity": "warning" }],
        "media-feature-parentheses-space-inside": [
            "never",
            { "severity": "warning" }
        ],
        "media-feature-range-operator-space-after": [
            "always",
            { "severity": "warning" }
        ],
        "media-feature-range-operator-space-before": [
            "always",
            { "severity": "warning" }
        ],
        "media-query-list-comma-newline-after": [
            "always-multi-line",
            { "severity": "warning" }
        ],
        "media-query-list-comma-space-after": [
            "always-single-line",
            { "severity": "warning" }
        ],
        "media-query-list-comma-space-before": [
            "never",
            { "severity": "warning" }
        ],
        "no-duplicate-at-import-rules": true,
        "no-duplicate-selectors": [true, { "severity": "warning" }],
        "no-empty-source": true,
        "no-extra-semicolons": [true, { "severity": "warning" }],
        "no-eol-whitespace": [true, { "severity": "warning" }],
        "no-missing-end-of-source-newline": [true, { "severity": "warning" }],
        "no-invalid-double-slash-comments": [true, { "severity": "warning" }],
        "number-leading-zero": ["always", { "severity": "warning" }],
        "number-no-trailing-zeros": [true, { "severity": "warning" }],
        "property-no-unknown": [true, { "severity": "warning" }],
        "property-case": ["lower", { "severity": "warning" }],
        "rule-empty-line-before": [
            "always-multi-line",
            {
                "except": ["first-nested"],
                "ignore": ["after-comment"],
                "severity": "warning"
            }
        ],
        "selector-pseudo-class-no-unknown": true,
        "selector-pseudo-element-no-unknown": true,
        "selector-type-no-unknown": true,
        "selector-attribute-brackets-space-inside": [
            "never",
            { "severity": "warning" }
        ],
        "selector-attribute-operator-space-after": [
            "never",
            { "severity": "warning" }
        ],
        "selector-attribute-operator-space-before": [
            "never",
            { "severity": "warning" }
        ],
        "selector-combinator-space-after": [
            "always",
            { "severity": "warning" }
        ],
        "selector-combinator-space-before": [
            "always",
            { "severity": "warning" }
        ],
        "selector-descendant-combinator-no-non-space": [
            true,
            { "severity": "warning" }
        ],
        "selector-list-comma-newline-after": [
            "always",
            { "severity": "warning" }
        ],
        "selector-list-comma-space-before": [
            "never",
            { "severity": "warning" }
        ],
        "selector-max-empty-lines": [0, { "severity": "warning" }],
        "selector-pseudo-class-case": ["lower", { "severity": "warning" }],
        "selector-pseudo-class-parentheses-space-inside": [
            "never",
            { "severity": "warning" }
        ],
        "selector-pseudo-element-case": ["lower", { "severity": "warning" }],
        "selector-pseudo-element-colon-notation": [
            "double",
            { "severity": "warning" }
        ],
        "selector-type-case": ["lower", { "severity": "warning" }],
        "string-no-newline": [true, { "severity": "warning" }],
        "unit-no-unknown": true,
        "unit-case": ["lower", { "severity": "warning" }],
        "value-list-comma-newline-after": [
            "always-multi-line",
            { "severity": "warning" }
        ],
        "value-list-comma-space-after": [
            "always-single-line",
            { "severity": "warning" }
        ],
        "value-list-comma-space-before": ["never", { "severity": "warning" }],
        "value-list-max-empty-lines": [0, { "severity": "warning" }]
    }
}