.stylelintrc

{
	"plugins": [
		"stylelint-order"
	],
	"ignoreFiles": [
		"./phpBB/styles/prosilver/theme/normalize.css"
	],
	"rules": {
		"at-rule-name-case": "lower",
		"at-rule-name-newline-after": "always-multi-line",
		"at-rule-name-space-after": "always-single-line",
		"at-rule-no-vendor-prefix": true,
		"at-rule-semicolon-newline-after": "always",

		"block-closing-brace-newline-after": [
			"always", {
				"ignoreAtRules": ["if", "else"]
			}
		],
		"block-closing-brace-newline-before": "always-multi-line",
		"block-closing-brace-space-before": "always-single-line",

		"block-no-empty": true,

		"block-opening-brace-newline-after": "always-multi-line",
		"block-opening-brace-space-after": "always-single-line",
		"block-opening-brace-space-before": "always",

		"color-hex-case": "lower",
		"color-hex-length": "long",
		"color-named": "never",
		"color-no-invalid-hex": true,

		"comment-empty-line-before": [
			"always", {
				"except": ["first-nested"],
				"ignore": ["stylelint-commands"]
			}
		],
		"comment-whitespace-inside": "always",

		"declaration-bang-space-after": "never",
		"declaration-bang-space-before": "always",

		"declaration-block-no-shorthand-property-overrides": true,
		"declaration-block-semicolon-newline-after": "always-multi-line",
		"declaration-block-semicolon-newline-before": "never-multi-line",
		"declaration-block-semicolon-space-after": "always-single-line",
		"declaration-block-semicolon-space-before": "never",
		"declaration-block-trailing-semicolon": "always",
		"declaration-block-single-line-max-declarations": 1,
		"declaration-block-no-duplicate-properties": [
			true, {
				"ignore": ["consecutive-duplicates-with-different-values"]
			}
		],

		"declaration-colon-newline-after": "always-multi-line",
		"declaration-colon-space-after": "always-single-line",
		"declaration-colon-space-before": "never",

		"declaration-empty-line-before": "never",

		"declaration-property-unit-disallowed-list": {
			"line-height": ["rem", "em", "%"]
		},
		"declaration-property-unit-allowed-list": {
			"height": ["px", "%", "vh"],
			"width": ["px", "%", "vw"],
			"font-size": ["px", "rem", "%"],
			"margin-left": ["px", "rem", "%"],
			"margin-right": ["px", "rem", "%"],
			"margin-top": ["px", "rem", "%"],
			"margin-bottom": ["px", "rem", "%"],
			"padding-left": ["px", "rem"],
			"padding-right": ["px", "rem"],
			"padding-top": ["px", "rem"],
			"padding-bottom": ["px", "rem"],
			"letter-spacing": ["em"],
			"word-spacing": ["em"]
		},

		"font-family-name-quotes": "always-where-recommended",
		"function-calc-no-unspaced-operator": true,

		"function-comma-newline-after": "never-multi-line",
		"function-comma-newline-before": "never-multi-line",
		"function-comma-space-after": "always-single-line",
		"function-comma-space-before": "never-single-line",

		"function-linear-gradient-no-nonstandard-direction": true,
		"function-max-empty-lines": 5,

		"function-name-case": "lower",
		"function-parentheses-newline-inside": "always-multi-line",
		"function-parentheses-space-inside": "never-single-line",
		"function-url-quotes": "always",
		"function-whitespace-after": "always",

		"indentation": "tab",

		"length-zero-no-unit": true,

		"max-empty-lines": 10,
		"max-line-length": 180,
		"max-nesting-depth": 4,

		"media-feature-colon-space-after": "always",
		"media-feature-colon-space-before": "never",
		"media-feature-name-case": "lower",
		"media-feature-parentheses-space-inside": "never",
		"media-feature-range-operator-space-after": "always",
		"media-feature-range-operator-space-before": "always",
		"media-query-list-comma-newline-after": "always-multi-line",
		"media-query-list-comma-newline-before": "never-multi-line",
		"media-query-list-comma-space-after": "always-single-line",
		"media-query-list-comma-space-before": "never",

		"no-duplicate-selectors": true,
		"no-empty-source": true,
		"no-eol-whitespace": true,
		"no-extra-semicolons": true,
		"no-missing-end-of-source-newline": true,
		"no-unknown-animations": true,

		"number-leading-zero": "always",
		"number-max-precision": 10,
		"number-no-trailing-zeros": true,

		"property-case": "lower",
		"property-no-unknown": true,

		"rule-empty-line-before": ["always-multi-line", {
			"ignore": ["after-comment"],
			"except": ["first-nested"]
		}],

		"selector-attribute-brackets-space-inside": "never",
		"selector-attribute-operator-space-after": "never",
		"selector-attribute-operator-space-before": "never",
		"selector-attribute-quotes": "always",

		"selector-combinator-space-after": "always",
		"selector-combinator-space-before": "always",

		"selector-list-comma-newline-after": "always",
		"selector-list-comma-space-before": "never",

		"selector-max-empty-lines": 5,
		"selector-max-compound-selectors": 5,

		"selector-pseudo-class-case": "lower",
		"selector-pseudo-class-no-unknown": true,
		"selector-pseudo-class-parentheses-space-inside": "never",

		"selector-pseudo-element-case": "lower",
		"selector-pseudo-element-colon-notation": "single",
		"selector-pseudo-element-no-unknown": true,

		"selector-type-case": "lower",
		"selector-type-no-unknown": true,

		"selector-descendant-combinator-no-non-space": true,
		"selector-max-id": 0,
		"selector-no-qualifying-type": [
			true, {
				"ignore": ["attribute"]
			}
		],

		"shorthand-property-no-redundant-values": true,

		"string-no-newline": true,
		"string-quotes": "double",

		"unit-case": "lower",
		"unit-no-unknown": true,

		"value-list-comma-newline-after": "always-multi-line",
		"value-list-comma-newline-before": "never-multi-line",
		"value-list-comma-space-after": "always-single-line",
		"value-list-comma-space-before": "never",
		"order/order": [
			"custom-properties",
			"dollar-variables",
			{
				"type": "at-rule",
				"name": "include",
				"parameter": "type"
			},
			"declarations",
			"rules",
			{
				"type": "at-rule",
				"name": "include",
				"parameter": "fluid"
			},
			{
				"type": "at-rule",
				"name": "media"
			}
		],
		"order/properties-order": [
			[
				"font",
				"font-family",
				"font-size",
				"font-weight",
				"font-style",
				"font-variant",
				"font-size-adjust",
				"font-stretch",
				"font-effect",
				"font-emphasize",
				"font-emphasize-position",
				"font-emphasize-style",
				"font-smooth",
				"font-smoothing",
				"line-height",
				"text-align",
				"text-align-last",
				"vertical-align",
				"white-space",
				"text-decoration",
				"text-emphasis",
				"text-emphasis-color",
				"text-emphasis-style",
				"text-emphasis-position",
				"text-indent",
				"text-justify",
				"letter-spacing",
				"word-spacing",
				"writing-mode",
				"text-outline",
				"text-transform",
				"text-size-adjust",
				"text-wrap",
				"text-overflow",
				"text-overflow-ellipsis",
				"text-overflow-mode",
				"word-wrap",
				"word-break",
				"tab-size",
				"hyphens",

				"background",
				"background-color",
				"background-image",
				"background-repeat",
				"background-attachment",
				"background-position",
				"background-position-x",
				"background-position-y",
				"background-clip",
				"background-origin",
				"background-size",
				"interpolation-mode",
				"filter",

				"border",
				"border-width",
				"border-style",
				"border-color",
				"border-top",
				"border-top-width",
				"border-top-style",
				"border-top-color",
				"border-right",
				"border-right-width",
				"border-right-style",
				"border-right-color",
				"border-bottom",
				"border-bottom-width",
				"border-bottom-style",
				"border-bottom-color",
				"border-left",
				"border-left-width",
				"border-left-style",
				"border-left-color",
				"border-radius",
				"border-top-left-radius",
				"border-top-right-radius",
				"border-bottom-right-radius",
				"border-bottom-left-radius",
				"border-image",
				"border-image-source",
				"border-image-slice",
				"border-image-width",
				"border-image-outset",
				"border-image-repeat",
				"outline",
				"outline-width",
				"outline-style",
				"outline-color",
				"outline-offset",
				"tap-highlight-color",

				"box-decoration-break",
				"box-shadow",
				"text-shadow",

				"color",
				"opacity",

				"position",
				"z-index",
				"top",
				"right",
				"bottom",
				"left",

				"display",
				"visibility",
				"float",
				"clear",
				"overflow",
				"overflow-x",
				"overflow-y",
				"overflow-scrolling",
				"clip",
				"zoom",
				"flex",
				"flex-direction",
				"flex-order",
				"flex-pack",
				"flex-align",
				"flex-basis",
				"flex-grow",
				"flex-shrink",
				"flex-wrap",
				"justify-content",
				"align-items",
				"align-self",

				"box-sizing",
				"width",
				"min-width",
				"max-width",
				"height",
				"min-height",
				"max-height",
				"margin",
				"margin-top",
				"margin-right",
				"margin-bottom",
				"margin-left",
				"padding",
				"padding-top",
				"padding-right",
				"padding-bottom",
				"padding-left",

				"table-layout",
				"empty-cells",
				"caption-side",
				"border-spacing",
				"border-collapse",
				"list-style",
				"list-style-position",
				"list-style-type",
				"list-style-image",

				"content",
				"quotes",
				"counter-reset",
				"counter-increment",
				"resize",
				"cursor",
				"touch-callout",
				"touch-action",
				"user-select",
				"nav-index",
				"nav-up",
				"nav-right",
				"nav-down",
				"nav-left",
				"transition",
				"transition-delay",
				"transition-timing-function",
				"transition-duration",
				"transition-property",
				"transform",
				"transform-origin",
				"animation",
				"animation-name",
				"animation-duration",
				"animation-play-state",
				"animation-timing-function",
				"animation-delay",
				"animation-iteration-count",
				"animation-direction",
				"pointer-events"
			],
			{ "unspecified": "bottomAlphabetical" }
		]
	}
}