.stylelintrc.json

{
  "$schema": "https://json.schemastore.org/stylelintrc",
  "extends": "stylelint-config-standard",
  "plugins": ["stylelint-use-nesting"],
  "ignoreFiles": ["_site/**/*"],
  "rules": {
    "declaration-property-unit-allowed-list": {
      "/^border/": ["px"],
      "/^padding|^gap/": ["rem"]
    },
    "unit-allowed-list": ["%", "deg", "px", "rem", "ms", "vw"],
    "number-max-precision": 5,
    "csstools/use-nesting": "always",
    "selector-max-universal": 0,
    "selector-disallowed-list": [
      "/^\\./",
      {
        "message": "Global Class-only selector \"%s\" is not allowed."
      }
    ],
    "selector-combinator-allowed-list": [">"],
    "selector-nested-pattern": [
      "^(?!&\\s*>)(&|>)\\s*",
      {
        "splitList": true,
        "message": "\"%s\" must start with a child combinator (>) or the ampersand (&)"
      }
    ],
    "no-descending-specificity": [
      true,
      { "ignore": ["selectors-within-list"] }
    ],
    "property-no-vendor-prefix": [
      true,
      {
        "ignoreProperties": ["appearance"]
      }
    ]
  }
}