.stylelintrc

{
    "extends": "stylelint-config-recommended",
    "rules": {
        "alpha-value-notation": [
            "percentage",
            {
                "exceptProperties": [
                    "opacity",
                    "fill-opacity",
                    "flood-opacity",
                    "stop-opacity",
                    "stroke-opacity"
                ]
            }
        ],
        "at-rule-empty-line-before": [
            "always",
            {
                "except": [
                    "blockless-after-same-name-blockless",
                    "first-nested"
                ],
                "ignore": [
                    "after-comment"
                ]
            }
        ],
        "at-rule-no-vendor-prefix": true,
        "color-function-notation": "modern",
        "color-hex-length": "short",
        "comment-empty-line-before": [
            "always",
            {
                "except": [
                    "first-nested"
                ],
                "ignore": [
                    "stylelint-commands"
                ]
            }
        ],
        "comment-whitespace-inside": "always",
        "custom-property-empty-line-before": [
            "always",
            {
                "except": [
                    "after-custom-property",
                    "first-nested"
                ],
                "ignore": [
                    "after-comment",
                    "inside-single-line-block"
                ]
            }
        ],
        "custom-media-pattern": "^([a-z][a-z0-9]*)(-[a-z0-9]+)*$",
        "custom-property-pattern": "^([a-z][a-z0-9]*)(-[a-z0-9]+)*$",
        "declaration-block-no-redundant-longhand-properties": true,
        "declaration-block-single-line-max-declarations": 1,
        "declaration-empty-line-before": [
            "always",
            {
                "except": [
                    "after-declaration",
                    "first-nested"
                ],
                "ignore": [
                    "after-comment",
                    "inside-single-line-block"
                ]
            }
        ],
        "font-family-name-quotes": "always-where-recommended",
        "function-name-case": "lower",
        "function-url-quotes": "always",
        "hue-degree-notation": "angle",
        "import-notation": "url",
        "keyframe-selector-notation": "percentage-unless-within-keyword-only-block",
        "keyframes-name-pattern": "^([a-z][a-z0-9]*)(-[a-z0-9]+)*$",
        "length-zero-no-unit": [
            true,
            {
                "ignore": [
                    "custom-properties"
                ]
            }
        ],
        "lightness-notation": "percentage",
        "media-feature-name-no-vendor-prefix": true,
        "media-feature-range-notation": "context",
        "number-max-precision": 4,
        "property-no-vendor-prefix": true,
        "rule-empty-line-before": [
            "always-multi-line",
            {
                "except": [
                    "first-nested"
                ],
                "ignore": [
                    "after-comment"
                ]
            }
        ],
        "selector-attribute-quotes": "always",
        "selector-class-pattern": "^([a-z][a-z0-9]*)(-[a-z0-9]+)*$",
        "selector-id-pattern": "^([a-z][a-z0-9]*)(-[a-z0-9]+)*$",
        "selector-no-vendor-prefix": true,
        "selector-not-notation": "complex",
        "selector-pseudo-element-colon-notation": "double",
        "selector-type-case": "lower",
        "shorthand-property-no-redundant-values": true,
        "value-keyword-case": "lower",
        "value-no-vendor-prefix": [
            true,
            {
                "ignoreValues": [
                    "box",
                    "inline-box"
                ]
            }
        ]
    }
}