.stylelintrc

{
  "processors": ["stylelint-processor-html"],
  "extends": "stylelint-config-standard",
  "rules": {
    "block-no-empty": true,
    "block-opening-brace-space-before": "always",
    "color-hex-case": "lower",
    "color-hex-length": "long",
    "color-named": "never",
    "color-no-invalid-hex": true,
    "declaration-block-no-duplicate-properties": true,
    "declaration-block-no-shorthand-property-overrides": true,
    "declaration-block-semicolon-space-before": "never",
    "declaration-block-single-line-max-declarations": 1,
    "declaration-colon-space-after": "always",
    "declaration-colon-space-before": "never",
    "font-weight-notation": "numeric",
    "length-zero-no-unit": true,
    "no-duplicate-selectors": true,
    "no-extra-semicolons": true,
    "no-invalid-double-slash-comments": true,
    "number-leading-zero": "always",
    "number-no-trailing-zeros": true,
    "selector-list-comma-newline-after": "always-multi-line",
    "selector-max-compound-selectors": 5,
    "shorthand-property-no-redundant-values": true,
    "value-keyword-case": "lower",
    "value-no-vendor-prefix": true,
    "no-empty-source": null,
    "semi": ["error", "never"]
  }
}