.stylelintrc.json

{
  "extends": "stylelint-config-standard",
  "rules": {
    "at-rule-empty-line-before": [
      "always",
      {
        "except": ["blockless-after-blockless", "inside-block"],
        "ignore": ["after-comment", "inside-block"]
      }
    ],
    "at-rule-name-case": "lower",
    "at-rule-no-unknown": [
      true,
      {
        "ignoreAtRules": ["import", "mixin", "extend", "include", "each"]
      }
    ],
    "at-rule-no-vendor-prefix": true,
    "color-hex-case": "upper",
    "color-hex-length": "long",
    "color-named": "never",
    "declaration-empty-line-before": "never",
    "declaration-no-important": true,
    "font-weight-notation": "numeric",
    "no-descending-specificity": [true, { "severity": "warning" }],
    "selector-class-pattern": "^([a-z][a-z]*)(-[a-z]+)*$",
    "selector-max-id": 0,
    "shorthand-property-no-redundant-values": true,
    "string-quotes": "single",
    "value-no-vendor-prefix": true
  }
}