.stylelintrc.json

{
  "extends": ["stylelint-config-standard"],
  "plugins": ["stylelint-order"],
  "customSyntax": "postcss-lit",
  "rules": {
    "order/properties-alphabetical-order": true,
    "no-duplicate-selectors": true,
    "color-hex-length": "short",
    "selector-attribute-quotes": "always",
    "value-no-vendor-prefix": true,
    "font-weight-notation": "named-where-possible",
    "font-family-name-quotes": "always-unless-keyword",
    "comment-whitespace-inside": "always",
    "comment-empty-line-before": null,
    "rule-empty-line-before": [
      "always-multi-line",
      {
        "except": ["first-nested"]
      }
    ],
    "selector-pseudo-element-colon-notation": "double",
    "media-feature-name-no-vendor-prefix": true,
    "no-descending-specificity": null,
    "declaration-block-no-redundant-longhand-properties": null,
    "property-no-vendor-prefix": null,
    "selector-class-pattern": [
      "^([a-z][a-z0-9]*)((-{1,2}|_{1,2})[a-z0-9]+)*$",
      {
        "message": "Expected class selector to be either kebab-case, kebab--case or snake__case"
      }
    ],
    "selector-id-pattern": [
      "^([a-z][a-z0-9]*)((-{1,2}|_{1,2})[a-z0-9]+)*$",
      {
        "message": "Expected id selector to be either kebab-case, kebab--case or snake__case"
      }
    ]
  }
}