diff --git a/packages/selector-specificity/CHANGELOG.md b/packages/selector-specificity/CHANGELOG.md
index c5d8456ff..8591ba57a 100644
--- a/packages/selector-specificity/CHANGELOG.md
+++ b/packages/selector-specificity/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changes to Selector Specificity
 
+### Unreleased (patch)
+
+- Prevent mutation of selectors with An+B microsyntax (e.g. `:nth-child(2n+1 of .foo)`) during specificity calculation
+
 ### 3.1.0
 
 _May 11, 2024_
diff --git a/packages/selector-specificity/dist/index.cjs b/packages/selector-specificity/dist/index.cjs
index bdd635af5..22f96490c 100644
--- a/packages/selector-specificity/dist/index.cjs
+++ b/packages/selector-specificity/dist/index.cjs
@@ -1 +1 @@
-"use strict";var e=require("postcss-selector-parser");function selectorSpecificity(t,s){const i=s?.customSpecificity?.(t);if(i)return i;if(!t)return{a:0,b:0,c:0};let c=0,n=0,o=0;if("universal"==t.type)return{a:0,b:0,c:0};if("id"===t.type)c+=1;else if("tag"===t.type)o+=1;else if("class"===t.type)n+=1;else if("attribute"===t.type)n+=1;else if(isPseudoElement(t))switch(t.value.toLowerCase()){case"::slotted":if(o+=1,t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case"::view-transition-group":case"::view-transition-image-pair":case"::view-transition-old":case"::view-transition-new":return t.nodes&&1===t.nodes.length&&"selector"===t.nodes[0].type&&selectorNodeContainsNothingOrOnlyUniversal(t.nodes[0])?{a:0,b:0,c:0}:{a:0,b:0,c:1};default:o+=1}else if(e.isPseudoClass(t))switch(t.value.toLowerCase()){case":-webkit-any":case":any":default:n+=1;break;case":-moz-any":case":has":case":is":case":matches":case":not":if(t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case":where":break;case":nth-child":case":nth-last-child":if(n+=1,t.nodes&&t.nodes.length>0){const i=t.nodes[0].nodes.findIndex((e=>"tag"===e.type&&"of"===e.value.toLowerCase()));if(i>-1){const a=e.selector({nodes:[],value:""});a.parent=t;t.nodes[0].nodes.slice(i+1).forEach((e=>{e.remove(),a.append(e)}));const r=[a];t.nodes.length>1&&r.push(...t.nodes.slice(1));const f=specificityOfMostSpecificListItem(r,s);c+=f.a,n+=f.b,o+=f.c}}break;case":local":case":global":t.nodes&&t.nodes.length>0&&t.nodes.forEach((e=>{const t=selectorSpecificity(e,s);c+=t.a,n+=t.b,o+=t.c}));break;case":host":case":host-context":if(n+=1,t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case":active-view-transition":case":active-view-transition-type":return{a:0,b:1,c:0}}else e.isContainer(t)&&t.nodes.length>0&&t.nodes.forEach((e=>{const t=selectorSpecificity(e,s);c+=t.a,n+=t.b,o+=t.c}));return{a:c,b:n,c:o}}function specificityOfMostSpecificListItem(e,t){let s={a:0,b:0,c:0};return e.forEach((e=>{const i=selectorSpecificity(e,t);i.a>s.a?s=i:i.a<s.a||(i.b>s.b?s=i:i.b<s.b||i.c>s.c&&(s=i))})),s}function isPseudoElement(t){return e.isPseudoElement(t)}function selectorNodeContainsNothingOrOnlyUniversal(e){if(!e)return!1;if(!e.nodes)return!1;const t=e.nodes.filter((e=>"comment"!==e.type));return 0===t.length||1===t.length&&"universal"===t[0].type}exports.compare=function compare(e,t){return e.a===t.a?e.b===t.b?e.c-t.c:e.b-t.b:e.a-t.a},exports.selectorSpecificity=selectorSpecificity,exports.specificityOfMostSpecificListItem=specificityOfMostSpecificListItem;
+"use strict";var e=require("postcss-selector-parser");function compare(e,t){return e.a===t.a?e.b===t.b?e.c-t.c:e.b-t.b:e.a-t.a}function selectorSpecificity(t,s){const i=s?.customSpecificity?.(t);if(i)return i;if(!t)return{a:0,b:0,c:0};let c=0,n=0,o=0;if("universal"==t.type)return{a:0,b:0,c:0};if("id"===t.type)c+=1;else if("tag"===t.type)o+=1;else if("class"===t.type)n+=1;else if("attribute"===t.type)n+=1;else if(isPseudoElement(t))switch(t.value.toLowerCase()){case"::slotted":if(o+=1,t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case"::view-transition-group":case"::view-transition-image-pair":case"::view-transition-old":case"::view-transition-new":return t.nodes&&1===t.nodes.length&&"selector"===t.nodes[0].type&&selectorNodeContainsNothingOrOnlyUniversal(t.nodes[0])?{a:0,b:0,c:0}:{a:0,b:0,c:1};default:o+=1}else if(e.isPseudoClass(t))switch(t.value.toLowerCase()){case":-webkit-any":case":any":default:n+=1;break;case":-moz-any":case":has":case":is":case":matches":case":not":if(t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case":where":break;case":nth-child":case":nth-last-child":if(n+=1,t.nodes&&t.nodes.length>0){const i=t.nodes[0].nodes.findIndex((e=>"tag"===e.type&&"of"===e.value.toLowerCase()));if(i>-1){const a=e.selector({nodes:[],value:""});t.nodes[0].nodes.slice(i+1).forEach((e=>{a.append(e.clone())}));const r=[a];t.nodes.length>1&&r.push(...t.nodes.slice(1));const l=specificityOfMostSpecificListItem(r,s);c+=l.a,n+=l.b,o+=l.c}}break;case":local":case":global":t.nodes&&t.nodes.length>0&&t.nodes.forEach((e=>{const t=selectorSpecificity(e,s);c+=t.a,n+=t.b,o+=t.c}));break;case":host":case":host-context":if(n+=1,t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case":active-view-transition":case":active-view-transition-type":return{a:0,b:1,c:0}}else e.isContainer(t)&&t.nodes?.length>0&&t.nodes.forEach((e=>{const t=selectorSpecificity(e,s);c+=t.a,n+=t.b,o+=t.c}));return{a:c,b:n,c:o}}function specificityOfMostSpecificListItem(e,t){let s={a:0,b:0,c:0};return e.forEach((e=>{const i=selectorSpecificity(e,t);compare(i,s)<0||(s=i)})),s}function isPseudoElement(t){return e.isPseudoElement(t)}function selectorNodeContainsNothingOrOnlyUniversal(e){if(!e)return!1;if(!e.nodes)return!1;const t=e.nodes.filter((e=>"comment"!==e.type));return 0===t.length||1===t.length&&"universal"===t[0].type}exports.compare=compare,exports.selectorSpecificity=selectorSpecificity,exports.specificityOfMostSpecificListItem=specificityOfMostSpecificListItem;
diff --git a/packages/selector-specificity/dist/index.mjs b/packages/selector-specificity/dist/index.mjs
index 92fc56cac..b6c4e1cbe 100644
--- a/packages/selector-specificity/dist/index.mjs
+++ b/packages/selector-specificity/dist/index.mjs
@@ -1 +1 @@
-import e from"postcss-selector-parser";function compare(e,t){return e.a===t.a?e.b===t.b?e.c-t.c:e.b-t.b:e.a-t.a}function selectorSpecificity(t,s){const i=s?.customSpecificity?.(t);if(i)return i;if(!t)return{a:0,b:0,c:0};let c=0,n=0,o=0;if("universal"==t.type)return{a:0,b:0,c:0};if("id"===t.type)c+=1;else if("tag"===t.type)o+=1;else if("class"===t.type)n+=1;else if("attribute"===t.type)n+=1;else if(isPseudoElement(t))switch(t.value.toLowerCase()){case"::slotted":if(o+=1,t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case"::view-transition-group":case"::view-transition-image-pair":case"::view-transition-old":case"::view-transition-new":return t.nodes&&1===t.nodes.length&&"selector"===t.nodes[0].type&&selectorNodeContainsNothingOrOnlyUniversal(t.nodes[0])?{a:0,b:0,c:0}:{a:0,b:0,c:1};default:o+=1}else if(e.isPseudoClass(t))switch(t.value.toLowerCase()){case":-webkit-any":case":any":default:n+=1;break;case":-moz-any":case":has":case":is":case":matches":case":not":if(t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case":where":break;case":nth-child":case":nth-last-child":if(n+=1,t.nodes&&t.nodes.length>0){const i=t.nodes[0].nodes.findIndex((e=>"tag"===e.type&&"of"===e.value.toLowerCase()));if(i>-1){const a=e.selector({nodes:[],value:""});a.parent=t;t.nodes[0].nodes.slice(i+1).forEach((e=>{e.remove(),a.append(e)}));const r=[a];t.nodes.length>1&&r.push(...t.nodes.slice(1));const l=specificityOfMostSpecificListItem(r,s);c+=l.a,n+=l.b,o+=l.c}}break;case":local":case":global":t.nodes&&t.nodes.length>0&&t.nodes.forEach((e=>{const t=selectorSpecificity(e,s);c+=t.a,n+=t.b,o+=t.c}));break;case":host":case":host-context":if(n+=1,t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case":active-view-transition":case":active-view-transition-type":return{a:0,b:1,c:0}}else e.isContainer(t)&&t.nodes.length>0&&t.nodes.forEach((e=>{const t=selectorSpecificity(e,s);c+=t.a,n+=t.b,o+=t.c}));return{a:c,b:n,c:o}}function specificityOfMostSpecificListItem(e,t){let s={a:0,b:0,c:0};return e.forEach((e=>{const i=selectorSpecificity(e,t);i.a>s.a?s=i:i.a<s.a||(i.b>s.b?s=i:i.b<s.b||i.c>s.c&&(s=i))})),s}function isPseudoElement(t){return e.isPseudoElement(t)}function selectorNodeContainsNothingOrOnlyUniversal(e){if(!e)return!1;if(!e.nodes)return!1;const t=e.nodes.filter((e=>"comment"!==e.type));return 0===t.length||1===t.length&&"universal"===t[0].type}export{compare,selectorSpecificity,specificityOfMostSpecificListItem};
+import e from"postcss-selector-parser";function compare(e,t){return e.a===t.a?e.b===t.b?e.c-t.c:e.b-t.b:e.a-t.a}function selectorSpecificity(t,s){const i=s?.customSpecificity?.(t);if(i)return i;if(!t)return{a:0,b:0,c:0};let c=0,n=0,o=0;if("universal"==t.type)return{a:0,b:0,c:0};if("id"===t.type)c+=1;else if("tag"===t.type)o+=1;else if("class"===t.type)n+=1;else if("attribute"===t.type)n+=1;else if(isPseudoElement(t))switch(t.value.toLowerCase()){case"::slotted":if(o+=1,t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case"::view-transition-group":case"::view-transition-image-pair":case"::view-transition-old":case"::view-transition-new":return t.nodes&&1===t.nodes.length&&"selector"===t.nodes[0].type&&selectorNodeContainsNothingOrOnlyUniversal(t.nodes[0])?{a:0,b:0,c:0}:{a:0,b:0,c:1};default:o+=1}else if(e.isPseudoClass(t))switch(t.value.toLowerCase()){case":-webkit-any":case":any":default:n+=1;break;case":-moz-any":case":has":case":is":case":matches":case":not":if(t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case":where":break;case":nth-child":case":nth-last-child":if(n+=1,t.nodes&&t.nodes.length>0){const i=t.nodes[0].nodes.findIndex((e=>"tag"===e.type&&"of"===e.value.toLowerCase()));if(i>-1){const a=e.selector({nodes:[],value:""});t.nodes[0].nodes.slice(i+1).forEach((e=>{a.append(e.clone())}));const r=[a];t.nodes.length>1&&r.push(...t.nodes.slice(1));const l=specificityOfMostSpecificListItem(r,s);c+=l.a,n+=l.b,o+=l.c}}break;case":local":case":global":t.nodes&&t.nodes.length>0&&t.nodes.forEach((e=>{const t=selectorSpecificity(e,s);c+=t.a,n+=t.b,o+=t.c}));break;case":host":case":host-context":if(n+=1,t.nodes&&t.nodes.length>0){const e=specificityOfMostSpecificListItem(t.nodes,s);c+=e.a,n+=e.b,o+=e.c}break;case":active-view-transition":case":active-view-transition-type":return{a:0,b:1,c:0}}else e.isContainer(t)&&t.nodes?.length>0&&t.nodes.forEach((e=>{const t=selectorSpecificity(e,s);c+=t.a,n+=t.b,o+=t.c}));return{a:c,b:n,c:o}}function specificityOfMostSpecificListItem(e,t){let s={a:0,b:0,c:0};return e.forEach((e=>{const i=selectorSpecificity(e,t);compare(i,s)<0||(s=i)})),s}function isPseudoElement(t){return e.isPseudoElement(t)}function selectorNodeContainsNothingOrOnlyUniversal(e){if(!e)return!1;if(!e.nodes)return!1;const t=e.nodes.filter((e=>"comment"!==e.type));return 0===t.length||1===t.length&&"universal"===t[0].type}export{compare,selectorSpecificity,specificityOfMostSpecificListItem};
diff --git a/packages/selector-specificity/src/index.ts b/packages/selector-specificity/src/index.ts
index f8259266b..4f5c517d9 100644
--- a/packages/selector-specificity/src/index.ts
+++ b/packages/selector-specificity/src/index.ts
@@ -193,16 +193,11 @@ export function selectorSpecificity(node: Node, options?: CalculationOptions): S
 								value: '',
 							});
 
-							selector.parent = node;
-
-							const firstPart = node.nodes[0].nodes.slice(ofSeparatorIndex + 1);
-							firstPart.forEach((child) => {
-								child.remove();
-								selector.append(child);
+							node.nodes[0].nodes.slice(ofSeparatorIndex + 1).forEach((child) => {
+								selector.append(child.clone());
 							});
 
 							const selectorList = [selector];
-
 							if (node.nodes.length > 1) {
 								selectorList.push(...node.nodes.slice(1));
 							}
@@ -273,7 +268,7 @@ export function selectorSpecificity(node: Node, options?: CalculationOptions): S
 			default:
 				b += 1;
 		}
-	} else if ((parser.isContainer(node)) && node.nodes.length > 0) {
+	} else if ((parser.isContainer(node)) && node.nodes?.length > 0) {
 		node.nodes.forEach((child) => {
 			const specificity = selectorSpecificity(child, options);
 			a += specificity.a;
@@ -301,24 +296,11 @@ export function specificityOfMostSpecificListItem(nodes: Array<Node>, options?:
 
 	nodes.forEach((child) => {
 		const itemSpecificity = selectorSpecificity(child, options);
-		if (itemSpecificity.a > mostSpecificListItem.a) {
-			mostSpecificListItem = itemSpecificity;
-			return;
-		} else if (itemSpecificity.a < mostSpecificListItem.a) {
+		if (compare(itemSpecificity, mostSpecificListItem) < 0) {
 			return;
 		}
 
-		if (itemSpecificity.b > mostSpecificListItem.b) {
-			mostSpecificListItem = itemSpecificity;
-			return;
-		} else if (itemSpecificity.b < mostSpecificListItem.b) {
-			return;
-		}
-
-		if (itemSpecificity.c > mostSpecificListItem.c) {
-			mostSpecificListItem = itemSpecificity;
-			return;
-		}
+		mostSpecificListItem = itemSpecificity;
 	});
 
 	return mostSpecificListItem;
diff --git a/plugins/postcss-is-pseudo-class/dist/index.cjs b/plugins/postcss-is-pseudo-class/dist/index.cjs
index 31b3157c8..3055fe924 100644
--- a/plugins/postcss-is-pseudo-class/dist/index.cjs
+++ b/plugins/postcss-is-pseudo-class/dist/index.cjs
@@ -1 +1 @@
-"use strict";var e=require("postcss-selector-parser"),o=require("@csstools/selector-specificity");function alwaysValidSelector(o){const s=e().astSync(o);let t=!0;return s.walk((e=>{if("class"!==e.type&&"comment"!==e.type&&"id"!==e.type&&"root"!==e.type&&"selector"!==e.type&&"string"!==e.type&&"tag"!==e.type&&"universal"!==e.type&&("attribute"!==e.type||e.insensitive)&&("combinator"!==e.type||"+"!==e.value&&">"!==e.value&&"~"!==e.value&&" "!==e.value)&&("pseudo"!==e.type||e.nodes?.length||":hover"!==e.value.toLowerCase()&&":focus"!==e.value.toLowerCase())){if("pseudo"===e.type&&1===e.nodes?.length&&":not"===e.value.toLowerCase()){let o=!0;if(e.nodes[0].walkCombinators((()=>{o=!1})),o)return}return t=!1,!1}})),t}function sortCompoundSelectorsInsideComplexSelector(o){if(!o||!o.nodes||1===o.nodes.length)return;const s=[];let t=[];for(let n=0;n<o.nodes.length;n++)"combinator"!==o.nodes[n].type?e.isPseudoElement(o.nodes[n])?(s.push(t),t=[o.nodes[n]]):t.push(o.nodes[n]):(s.push(t),s.push([o.nodes[n]]),t=[]);s.push(t);const n=[];for(let e=0;e<s.length;e++){const o=s[e];o.sort(((e,o)=>"selector"===e.type&&"selector"===o.type&&e.nodes.length&&o.nodes.length?selectorTypeOrder(e.nodes[0],e.nodes[0].type)-selectorTypeOrder(o.nodes[0],o.nodes[0].type):"selector"===e.type&&e.nodes.length?selectorTypeOrder(e.nodes[0],e.nodes[0].type)-selectorTypeOrder(o,o.type):"selector"===o.type&&o.nodes.length?selectorTypeOrder(e,e.type)-selectorTypeOrder(o.nodes[0],o.nodes[0].type):selectorTypeOrder(e,e.type)-selectorTypeOrder(o,o.type)));const t=new Set(o.map((e=>e.type))),r=t.has("universal")&&(t.has("tag")||t.has("attribute")||t.has("class")||t.has("id")||t.has("pseudo"));for(let e=0;e<o.length;e++)"universal"===o[e].type&&r?o[e].remove():n.push(o[e])}for(let s=n.length-1;s>=0;s--){const t=n[s-1];if(n[s].remove(),t&&"tag"===t.type&&"tag"===n[s].type){const t=e.pseudo({value:":is",nodes:[e.selector({value:"",nodes:[n[s]]})]});o.prepend(t)}else o.prepend(n[s])}}function selectorTypeOrder(o,t){return e.isPseudoElement(o)?s.pseudoElement:s[t]}const s={universal:0,tag:1,pseudoElement:2,id:3,class:4,attribute:5,pseudo:6,selector:7,string:8,root:9,comment:10};function childAdjacentChild(e){return!(!e||!e.nodes)&&("selector"===e.type&&(3===e.nodes.length&&(!(!e.nodes[0]||"pseudo"!==e.nodes[0].type||":-csstools-matches"!==e.nodes[0].value)&&(!(!e.nodes[1]||"combinator"!==e.nodes[1].type||"+"!==e.nodes[1].value&&"~"!==e.nodes[1].value)&&(!(!e.nodes[2]||"pseudo"!==e.nodes[2].type||":-csstools-matches"!==e.nodes[2].value)&&(!(!e.nodes[0].nodes||1!==e.nodes[0].nodes.length)&&("selector"===e.nodes[0].nodes[0].type&&(!(!e.nodes[0].nodes[0].nodes||3!==e.nodes[0].nodes[0].nodes.length)&&(!(!e.nodes[0].nodes[0].nodes||"combinator"!==e.nodes[0].nodes[0].nodes[1].type||">"!==e.nodes[0].nodes[0].nodes[1].value)&&(!(!e.nodes[2].nodes||1!==e.nodes[2].nodes.length)&&("selector"===e.nodes[2].nodes[0].type&&(!(!e.nodes[2].nodes[0].nodes||3!==e.nodes[2].nodes[0].nodes.length)&&(!(!e.nodes[2].nodes[0].nodes||"combinator"!==e.nodes[2].nodes[0].nodes[1].type||">"!==e.nodes[2].nodes[0].nodes[1].value)&&(e.nodes[0].nodes[0].insertAfter(e.nodes[0].nodes[0].nodes[0],e.nodes[2].nodes[0].nodes[0].clone()),e.nodes[2].nodes[0].nodes[1].remove(),e.nodes[2].nodes[0].nodes[0].remove(),e.nodes[0].replaceWith(e.nodes[0].nodes[0]),e.nodes[2].replaceWith(e.nodes[2].nodes[0]),!0))))))))))))))}function isInCompoundWithOneOtherElement(o){if(!o||!o.nodes)return!1;if("selector"!==o.type)return!1;if(2!==o.nodes.length)return!1;let s,t;return o.nodes[0]&&"pseudo"===o.nodes[0].type&&":-csstools-matches"===o.nodes[0].value?(s=0,t=1):o.nodes[1]&&"pseudo"===o.nodes[1].type&&":-csstools-matches"===o.nodes[1].value&&(s=1,t=0),!!s&&(!!o.nodes[t]&&(("selector"!==o.nodes[t].type||!o.nodes[t].some((o=>"combinator"===o.type||e.isPseudoElement(o))))&&("combinator"!==o.nodes[t].type&&(o.nodes[s].nodes[0].append(o.nodes[t].clone()),o.nodes[s].replaceWith(...o.nodes[s].nodes[0].nodes),o.nodes[t].remove(),!0))))}function isPseudoInFirstCompound(e){if(!e||!e.nodes)return!1;if("selector"!==e.type)return!1;let o=-1;for(let s=0;s<e.nodes.length;s++){const t=e.nodes[s];if("combinator"===t.type)return!1;if("pseudo"===t.type&&":-csstools-matches"===t.value){if(!t.nodes||1!==t.nodes.length)return!1;o=s;break}}if(-1===o)return!1;const s=e.nodes.slice(0,o),t=e.nodes[o],n=e.nodes.slice(o+1);return s.forEach((e=>{t.nodes[0].append(e.clone())})),n.forEach((e=>{t.nodes[0].append(e.clone())})),t.replaceWith(...t.nodes),s.forEach((e=>{e.remove()})),n.forEach((e=>{e.remove()})),!0}function complexSelectors(o,s,t,n){return o.flatMap((o=>{if(-1===o.indexOf(":-csstools-matches")&&-1===o.toLowerCase().indexOf(":is"))return o;const r=e().astSync(o);return r.walkPseudos((o=>{if(":is"===o.value.toLowerCase()&&o.nodes&&o.nodes.length&&"selector"===o.nodes[0].type&&0===o.nodes[0].nodes.length)return o.value=":not",void o.nodes[0].append(e.universal());if(":-csstools-matches"===o.value)if(!o.nodes||o.nodes.length){if(o.walkPseudos((o=>{if(e.isPseudoElement(o)){let e=o.value;if(e.startsWith("::-csstools-invalid-"))return;for(;e.startsWith(":");)e=e.slice(1);o.value=`::-csstools-invalid-${e}`,n()}})),1===o.nodes.length&&"selector"===o.nodes[0].type){if(1===o.nodes[0].nodes.length)return void o.replaceWith(o.nodes[0].nodes[0]);if(!o.nodes[0].some((e=>"combinator"===e.type)))return void o.replaceWith(...o.nodes[0].nodes)}1!==r.nodes.length||"selector"!==r.nodes[0].type||1!==r.nodes[0].nodes.length||r.nodes[0].nodes[0]!==o?childAdjacentChild(o.parent)||isInCompoundWithOneOtherElement(o.parent)||isPseudoInFirstCompound(o.parent)||("warning"===s.onComplexSelector&&t(),o.value=":is"):o.replaceWith(...o.nodes[0].nodes)}else o.remove()})),r.walk((e=>{"selector"===e.type&&"nodes"in e&&1===e.nodes.length&&"selector"===e.nodes[0].type&&e.replaceWith(e.nodes[0])})),r.walk((e=>{"nodes"in e&&sortCompoundSelectorsInsideComplexSelector(e)})),r.toString()})).filter((e=>!!e))}function splitSelectors(s,t,n=0){const r=":not(#"+t.specificityMatchingName+")",d=":not(."+t.specificityMatchingName+")",l=":not("+t.specificityMatchingName+")";return s.flatMap((s=>{if(-1===s.toLowerCase().indexOf(":is"))return s;let c=!1;const i=[];if(e().astSync(s).walkPseudos((e=>{if(":is"!==e.value.toLowerCase()||!e.nodes||!e.nodes.length)return;if("selector"===e.nodes[0].type&&0===e.nodes[0].nodes.length)return;if("pseudo"===e.parent?.parent?.type&&":not"===e.parent?.parent?.value?.toLowerCase())return void i.push([{start:e.parent.parent.sourceIndex,end:e.parent.parent.sourceIndex+e.parent.parent.toString().length,option:`:not(${e.nodes.toString()})`}]);if("pseudo"===e.parent?.parent?.type&&":has"===e.parent?.parent?.value?.toLowerCase())return void(e.value=":-csstools-matches");let s=e.parent;for(;s;){if(s.value&&":is"===s.value.toLowerCase()&&"pseudo"===s.type)return void(c=!0);s=s.parent}const t=o.selectorSpecificity(e),n=e.sourceIndex,a=n+e.toString().length,p=[];e.nodes.forEach((e=>{const s={start:n,end:a,option:""},c=o.selectorSpecificity(e);let i=e.toString().trim();const u=Math.max(0,t.a-c.a),h=Math.max(0,t.b-c.b),f=Math.max(0,t.c-c.c);for(let e=0;e<u;e++)i+=r;for(let e=0;e<h;e++)i+=d;for(let e=0;e<f;e++)i+=l;s.option=i,p.push(s)})),i.push(p)})),!i.length)return[s];let a=[];return cartesianProduct(...i).forEach((e=>{let o="";for(let t=0;t<e.length;t++){const n=e[t];o+=s.substring(e[t-1]?.end||0,e[t].start),o+=":-csstools-matches("+n.option+")",t===e.length-1&&(o+=s.substring(e[t].end))}a.push(o)})),c&&n<10&&(a=splitSelectors(a,t,n+1)),a})).filter((e=>!!e))}function cartesianProduct(...e){const o=[],s=e.length-1;return function helper(t,n){for(let r=0,d=e[n].length;r<d;r++){const d=t.slice(0);d.push(e[n][r]),n===s?o.push(d):helper(d,n+1)}}([],0),o}const t=/:is\(/i,creator=e=>{const o={specificityMatchingName:"does-not-exist",...e||{}};return{postcssPlugin:"postcss-is-pseudo-class",prepare(){const e=new WeakSet;return{postcssPlugin:"postcss-is-pseudo-class",Rule(s,{result:n}){if(!s.selector)return;if(!t.test(s.selector))return;if(e.has(s))return;let r=!1;const warnOnComplexSelector=()=>{"warning"===o.onComplexSelector&&(r||(r=!0,s.warn(n,`Complex selectors in '${s.selector}' can not be transformed to an equivalent selector without ':is()'.`)))};let d=!1;const warnOnPseudoElements=()=>{"warning"===o.onPseudoElement&&(d||(d=!0,s.warn(n,`Pseudo elements are not allowed in ':is()', unable to transform '${s.selector}'`)))};try{let t=!1;const n=[],r=complexSelectors(splitSelectors(s.selectors,{specificityMatchingName:o.specificityMatchingName}),{onComplexSelector:o.onComplexSelector},warnOnComplexSelector,warnOnPseudoElements);if(Array.from(new Set(r)).forEach((o=>{if(s.selectors.indexOf(o)>-1)n.push(o);else{if(alwaysValidSelector(o))return n.push(o),void(t=!0);e.add(s),s.cloneBefore({selector:o}),t=!0}})),n.length&&t&&(e.add(s),s.cloneBefore({selectors:n})),!o.preserve){if(!t)return;s.remove()}}catch(e){if(e.message.indexOf("call stack size exceeded")>-1)throw e;s.warn(n,`Failed to parse selector "${s.selector}"`)}}}}}};creator.postcss=!0,module.exports=creator;
+"use strict";var e=require("postcss-selector-parser"),o=require("@csstools/selector-specificity");function alwaysValidSelector(o){const s=e().astSync(o);let t=!0;return s.walk((e=>{if("class"!==e.type&&"comment"!==e.type&&"id"!==e.type&&"root"!==e.type&&"selector"!==e.type&&"string"!==e.type&&"tag"!==e.type&&"universal"!==e.type&&("attribute"!==e.type||e.insensitive)&&("combinator"!==e.type||"+"!==e.value&&">"!==e.value&&"~"!==e.value&&" "!==e.value)&&("pseudo"!==e.type||e.nodes?.length||":hover"!==e.value.toLowerCase()&&":focus"!==e.value.toLowerCase())){if("pseudo"===e.type&&1===e.nodes?.length&&":not"===e.value.toLowerCase()){let o=!0;if(e.nodes[0].walkCombinators((()=>{o=!1})),o)return}return t=!1,!1}})),t}function sortCompoundSelectorsInsideComplexSelector(o){if(!o||!o.nodes||1===o.nodes.length)return;const s=[];let t=[];for(let n=0;n<o.nodes.length;n++)"combinator"!==o.nodes[n].type?e.isPseudoElement(o.nodes[n])?(s.push(t),t=[o.nodes[n]]):t.push(o.nodes[n]):(s.push(t),s.push([o.nodes[n]]),t=[]);s.push(t);const n=[];for(let e=0;e<s.length;e++){const o=s[e];o.sort(((e,o)=>"selector"===e.type&&"selector"===o.type&&e.nodes.length&&o.nodes.length?selectorTypeOrder(e.nodes[0],e.nodes[0].type)-selectorTypeOrder(o.nodes[0],o.nodes[0].type):"selector"===e.type&&e.nodes.length?selectorTypeOrder(e.nodes[0],e.nodes[0].type)-selectorTypeOrder(o,o.type):"selector"===o.type&&o.nodes.length?selectorTypeOrder(e,e.type)-selectorTypeOrder(o.nodes[0],o.nodes[0].type):selectorTypeOrder(e,e.type)-selectorTypeOrder(o,o.type)));const t=new Set(o.map((e=>e.type))),r=t.has("universal")&&(t.has("tag")||t.has("attribute")||t.has("class")||t.has("id")||t.has("pseudo"));for(let e=0;e<o.length;e++)"universal"===o[e].type&&r?o[e].remove():n.push(o[e])}for(let s=n.length-1;s>=0;s--){const t=n[s-1];if(n[s].remove(),t&&"tag"===t.type&&"tag"===n[s].type){const t=e.pseudo({value:":is",nodes:[e.selector({value:"",nodes:[n[s]]})]});o.prepend(t)}else o.prepend(n[s])}}function selectorTypeOrder(o,t){return e.isPseudoElement(o)?s.pseudoElement:s[t]}const s={universal:0,tag:1,pseudoElement:2,id:3,class:4,attribute:5,pseudo:6,selector:7,string:8,root:9,comment:10};function childAdjacentChild(e){return!(!e||!e.nodes)&&("selector"===e.type&&(3===e.nodes.length&&(!(!e.nodes[0]||"pseudo"!==e.nodes[0].type||":-csstools-matches"!==e.nodes[0].value)&&(!(!e.nodes[1]||"combinator"!==e.nodes[1].type||"+"!==e.nodes[1].value&&"~"!==e.nodes[1].value)&&(!(!e.nodes[2]||"pseudo"!==e.nodes[2].type||":-csstools-matches"!==e.nodes[2].value)&&(!(!e.nodes[0].nodes||1!==e.nodes[0].nodes.length)&&("selector"===e.nodes[0].nodes[0].type&&(!(!e.nodes[0].nodes[0].nodes||3!==e.nodes[0].nodes[0].nodes.length)&&(!(!e.nodes[0].nodes[0].nodes||"combinator"!==e.nodes[0].nodes[0].nodes[1].type||">"!==e.nodes[0].nodes[0].nodes[1].value)&&(!(!e.nodes[2].nodes||1!==e.nodes[2].nodes.length)&&("selector"===e.nodes[2].nodes[0].type&&(!(!e.nodes[2].nodes[0].nodes||3!==e.nodes[2].nodes[0].nodes.length)&&(!(!e.nodes[2].nodes[0].nodes||"combinator"!==e.nodes[2].nodes[0].nodes[1].type||">"!==e.nodes[2].nodes[0].nodes[1].value)&&(e.nodes[0].nodes[0].insertAfter(e.nodes[0].nodes[0].nodes[0],e.nodes[2].nodes[0].nodes[0].clone()),e.nodes[2].nodes[0].nodes[1].remove(),e.nodes[2].nodes[0].nodes[0].remove(),e.nodes[0].replaceWith(e.nodes[0].nodes[0]),e.nodes[2].replaceWith(e.nodes[2].nodes[0]),!0))))))))))))))}function isInCompoundWithOneOtherElement(o){if(!o||!o.nodes)return!1;if("selector"!==o.type)return!1;if(2!==o.nodes.length)return!1;let s,t;return o.nodes[0]&&"pseudo"===o.nodes[0].type&&":-csstools-matches"===o.nodes[0].value?(s=0,t=1):o.nodes[1]&&"pseudo"===o.nodes[1].type&&":-csstools-matches"===o.nodes[1].value&&(s=1,t=0),!!s&&(!!o.nodes[t]&&(("selector"!==o.nodes[t].type||!o.nodes[t].some((o=>"combinator"===o.type||e.isPseudoElement(o))))&&("combinator"!==o.nodes[t].type&&(o.nodes[s].nodes[0].append(o.nodes[t].clone()),o.nodes[s].replaceWith(...o.nodes[s].nodes[0].nodes),o.nodes[t].remove(),!0))))}function isPseudoInFirstCompound(e){if(!e||!e.nodes)return!1;if("selector"!==e.type)return!1;let o=-1;for(let s=0;s<e.nodes.length;s++){const t=e.nodes[s];if("combinator"===t.type)return!1;if("pseudo"===t.type&&":-csstools-matches"===t.value){if(!t.nodes||1!==t.nodes.length)return!1;o=s;break}}if(-1===o)return!1;const s=e.nodes.slice(0,o),t=e.nodes[o],n=e.nodes.slice(o+1);return s.forEach((e=>{t.nodes[0].append(e.clone())})),n.forEach((e=>{t.nodes[0].append(e.clone())})),t.replaceWith(...t.nodes),s.forEach((e=>{e.remove()})),n.forEach((e=>{e.remove()})),!0}function complexSelectors(o,s,t,n){return o.flatMap((o=>{if(-1===o.indexOf(":-csstools-matches")&&-1===o.toLowerCase().indexOf(":is"))return o;const r=e().astSync(o);return r.walkPseudos((o=>{if(":is"===o.value.toLowerCase()&&o.nodes&&o.nodes.length&&"selector"===o.nodes[0].type&&0===o.nodes[0].nodes.length)return o.value=":not",void o.nodes[0].append(e.universal());if(":-csstools-matches"===o.value)if(!o.nodes||o.nodes.length){if(o.walkPseudos((o=>{if(e.isPseudoElement(o)){let e=o.value;if(e.startsWith("::-csstools-invalid-"))return;for(;e.startsWith(":");)e=e.slice(1);o.value=`::-csstools-invalid-${e}`,n()}})),1===o.nodes.length&&"selector"===o.nodes[0].type){if(1===o.nodes[0].nodes.length)return void o.replaceWith(o.nodes[0].nodes[0]);if(!o.nodes[0].some((e=>"combinator"===e.type)))return void o.replaceWith(...o.nodes[0].nodes)}1!==r.nodes.length||"selector"!==r.nodes[0].type||1!==r.nodes[0].nodes.length||r.nodes[0].nodes[0]!==o?childAdjacentChild(o.parent)||isInCompoundWithOneOtherElement(o.parent)||isPseudoInFirstCompound(o.parent)||("warning"===s.onComplexSelector&&t(),o.value=":is"):o.replaceWith(...o.nodes[0].nodes)}else o.remove()})),r.walk((e=>{"selector"===e.type&&"nodes"in e&&1===e.nodes.length&&"selector"===e.nodes[0].type&&e.replaceWith(e.nodes[0])})),r.walk((e=>{"nodes"in e&&sortCompoundSelectorsInsideComplexSelector(e)})),r.toString()})).filter((e=>!!e))}function splitSelectors(s,t,n=0){const r=":not(#"+t.specificityMatchingName+")",d=":not(."+t.specificityMatchingName+")",l=":not("+t.specificityMatchingName+")";return s.flatMap((s=>{if(-1===s.toLowerCase().indexOf(":is"))return s;let c=!1;const i=[];if(e().astSync(s).walkPseudos((e=>{if(":is"!==e.value.toLowerCase()||!e.nodes||!e.nodes.length)return;if("selector"===e.nodes[0].type&&0===e.nodes[0].nodes.length)return;if("pseudo"===e.parent?.parent?.type&&":not"===e.parent?.parent?.value?.toLowerCase())return void i.push([{start:e.parent.parent.sourceIndex,end:e.parent.parent.sourceIndex+e.parent.parent.toString().length,option:`:not(${e.nodes.toString()})`}]);if("pseudo"===e.parent?.parent?.type&&":has"===e.parent?.parent?.value?.toLowerCase())return void(e.value=":-csstools-matches");let s=e.parent;for(;s;){if(s.value&&":is"===s.value.toLowerCase()&&"pseudo"===s.type)return void(c=!0);s=s.parent}const t=o.selectorSpecificity(e),n=e.sourceIndex,a=n+e.toString().length,p=[];e.nodes.forEach((e=>{const s={start:n,end:a,option:""},c=o.selectorSpecificity(e);let i=e.toString().trim();const u=Math.max(0,t.a-c.a),h=Math.max(0,t.b-c.b),f=Math.max(0,t.c-c.c);for(let e=0;e<u;e++)i+=r;for(let e=0;e<h;e++)i+=d;for(let e=0;e<f;e++)i+=l;s.option=i,p.push(s)})),i.push(p)})),!i.length)return[s];let a=[];return cartesianProduct(...i).forEach((e=>{let o="";for(let t=0;t<e.length;t++){const n=e[t];o+=s.substring(e[t-1]?.end||0,e[t].start),o+=":-csstools-matches("+n.option+")",t===e.length-1&&(o+=s.substring(e[t].end))}a.push(o)})),c&&n<10&&(a=splitSelectors(a,t,n+1)),a})).filter((e=>!!e))}function cartesianProduct(...e){const o=[],s=e.length-1;return function helper(t,n){for(let r=0,d=e[n].length;r<d;r++){const d=t.slice(0);d.push(e[n][r]),n===s?o.push(d):helper(d,n+1)}}([],0),o}const t=/:is\(/i,creator=e=>{const o={specificityMatchingName:"does-not-exist",...e||{}};return{postcssPlugin:"postcss-is-pseudo-class",prepare(){const e=new WeakSet;return{postcssPlugin:"postcss-is-pseudo-class",Rule(s,{result:n}){if(!s.selector)return;if(!t.test(s.selector))return;if(e.has(s))return;let r=!1;const warnOnComplexSelector=()=>{"warning"===o.onComplexSelector&&(r||(r=!0,s.warn(n,`Complex selectors in '${s.selector}' can not be transformed to an equivalent selector without ':is()'.`)))};let d=!1;const warnOnPseudoElements=()=>{"warning"===o.onPseudoElement&&(d||(d=!0,s.warn(n,`Pseudo elements are not allowed in ':is()', unable to transform '${s.selector}'`)))};try{let t=!1;const n=[],r=complexSelectors(splitSelectors(s.selectors,{specificityMatchingName:o.specificityMatchingName}),{onComplexSelector:o.onComplexSelector},warnOnComplexSelector,warnOnPseudoElements);if(Array.from(new Set(r)).forEach((o=>{if(s.selectors.indexOf(o)>-1)n.push(o);else{if(alwaysValidSelector(o))return n.push(o),void(t=!0);e.add(s),s.cloneBefore({selector:o}),t=!0}})),n.length&&t&&(e.add(s),s.cloneBefore({selectors:n})),!o.preserve){if(!t)return;s.remove()}}catch(e){if(e.message.indexOf("call stack size exceeded")>-1)throw e;s.warn(n,`Failed to parse selector "${s.selector}" with error: ${e.message}`)}}}}}};creator.postcss=!0,module.exports=creator;
diff --git a/plugins/postcss-is-pseudo-class/dist/index.mjs b/plugins/postcss-is-pseudo-class/dist/index.mjs
index 42a457a37..2d34a4d22 100644
--- a/plugins/postcss-is-pseudo-class/dist/index.mjs
+++ b/plugins/postcss-is-pseudo-class/dist/index.mjs
@@ -1 +1 @@
-import e from"postcss-selector-parser";import{selectorSpecificity as o}from"@csstools/selector-specificity";function alwaysValidSelector(o){const s=e().astSync(o);let t=!0;return s.walk((e=>{if("class"!==e.type&&"comment"!==e.type&&"id"!==e.type&&"root"!==e.type&&"selector"!==e.type&&"string"!==e.type&&"tag"!==e.type&&"universal"!==e.type&&("attribute"!==e.type||e.insensitive)&&("combinator"!==e.type||"+"!==e.value&&">"!==e.value&&"~"!==e.value&&" "!==e.value)&&("pseudo"!==e.type||e.nodes?.length||":hover"!==e.value.toLowerCase()&&":focus"!==e.value.toLowerCase())){if("pseudo"===e.type&&1===e.nodes?.length&&":not"===e.value.toLowerCase()){let o=!0;if(e.nodes[0].walkCombinators((()=>{o=!1})),o)return}return t=!1,!1}})),t}function sortCompoundSelectorsInsideComplexSelector(o){if(!o||!o.nodes||1===o.nodes.length)return;const s=[];let t=[];for(let n=0;n<o.nodes.length;n++)"combinator"!==o.nodes[n].type?e.isPseudoElement(o.nodes[n])?(s.push(t),t=[o.nodes[n]]):t.push(o.nodes[n]):(s.push(t),s.push([o.nodes[n]]),t=[]);s.push(t);const n=[];for(let e=0;e<s.length;e++){const o=s[e];o.sort(((e,o)=>"selector"===e.type&&"selector"===o.type&&e.nodes.length&&o.nodes.length?selectorTypeOrder(e.nodes[0],e.nodes[0].type)-selectorTypeOrder(o.nodes[0],o.nodes[0].type):"selector"===e.type&&e.nodes.length?selectorTypeOrder(e.nodes[0],e.nodes[0].type)-selectorTypeOrder(o,o.type):"selector"===o.type&&o.nodes.length?selectorTypeOrder(e,e.type)-selectorTypeOrder(o.nodes[0],o.nodes[0].type):selectorTypeOrder(e,e.type)-selectorTypeOrder(o,o.type)));const t=new Set(o.map((e=>e.type))),r=t.has("universal")&&(t.has("tag")||t.has("attribute")||t.has("class")||t.has("id")||t.has("pseudo"));for(let e=0;e<o.length;e++)"universal"===o[e].type&&r?o[e].remove():n.push(o[e])}for(let s=n.length-1;s>=0;s--){const t=n[s-1];if(n[s].remove(),t&&"tag"===t.type&&"tag"===n[s].type){const t=e.pseudo({value:":is",nodes:[e.selector({value:"",nodes:[n[s]]})]});o.prepend(t)}else o.prepend(n[s])}}function selectorTypeOrder(o,t){return e.isPseudoElement(o)?s.pseudoElement:s[t]}const s={universal:0,tag:1,pseudoElement:2,id:3,class:4,attribute:5,pseudo:6,selector:7,string:8,root:9,comment:10};function childAdjacentChild(e){return!(!e||!e.nodes)&&("selector"===e.type&&(3===e.nodes.length&&(!(!e.nodes[0]||"pseudo"!==e.nodes[0].type||":-csstools-matches"!==e.nodes[0].value)&&(!(!e.nodes[1]||"combinator"!==e.nodes[1].type||"+"!==e.nodes[1].value&&"~"!==e.nodes[1].value)&&(!(!e.nodes[2]||"pseudo"!==e.nodes[2].type||":-csstools-matches"!==e.nodes[2].value)&&(!(!e.nodes[0].nodes||1!==e.nodes[0].nodes.length)&&("selector"===e.nodes[0].nodes[0].type&&(!(!e.nodes[0].nodes[0].nodes||3!==e.nodes[0].nodes[0].nodes.length)&&(!(!e.nodes[0].nodes[0].nodes||"combinator"!==e.nodes[0].nodes[0].nodes[1].type||">"!==e.nodes[0].nodes[0].nodes[1].value)&&(!(!e.nodes[2].nodes||1!==e.nodes[2].nodes.length)&&("selector"===e.nodes[2].nodes[0].type&&(!(!e.nodes[2].nodes[0].nodes||3!==e.nodes[2].nodes[0].nodes.length)&&(!(!e.nodes[2].nodes[0].nodes||"combinator"!==e.nodes[2].nodes[0].nodes[1].type||">"!==e.nodes[2].nodes[0].nodes[1].value)&&(e.nodes[0].nodes[0].insertAfter(e.nodes[0].nodes[0].nodes[0],e.nodes[2].nodes[0].nodes[0].clone()),e.nodes[2].nodes[0].nodes[1].remove(),e.nodes[2].nodes[0].nodes[0].remove(),e.nodes[0].replaceWith(e.nodes[0].nodes[0]),e.nodes[2].replaceWith(e.nodes[2].nodes[0]),!0))))))))))))))}function isInCompoundWithOneOtherElement(o){if(!o||!o.nodes)return!1;if("selector"!==o.type)return!1;if(2!==o.nodes.length)return!1;let s,t;return o.nodes[0]&&"pseudo"===o.nodes[0].type&&":-csstools-matches"===o.nodes[0].value?(s=0,t=1):o.nodes[1]&&"pseudo"===o.nodes[1].type&&":-csstools-matches"===o.nodes[1].value&&(s=1,t=0),!!s&&(!!o.nodes[t]&&(("selector"!==o.nodes[t].type||!o.nodes[t].some((o=>"combinator"===o.type||e.isPseudoElement(o))))&&("combinator"!==o.nodes[t].type&&(o.nodes[s].nodes[0].append(o.nodes[t].clone()),o.nodes[s].replaceWith(...o.nodes[s].nodes[0].nodes),o.nodes[t].remove(),!0))))}function isPseudoInFirstCompound(e){if(!e||!e.nodes)return!1;if("selector"!==e.type)return!1;let o=-1;for(let s=0;s<e.nodes.length;s++){const t=e.nodes[s];if("combinator"===t.type)return!1;if("pseudo"===t.type&&":-csstools-matches"===t.value){if(!t.nodes||1!==t.nodes.length)return!1;o=s;break}}if(-1===o)return!1;const s=e.nodes.slice(0,o),t=e.nodes[o],n=e.nodes.slice(o+1);return s.forEach((e=>{t.nodes[0].append(e.clone())})),n.forEach((e=>{t.nodes[0].append(e.clone())})),t.replaceWith(...t.nodes),s.forEach((e=>{e.remove()})),n.forEach((e=>{e.remove()})),!0}function complexSelectors(o,s,t,n){return o.flatMap((o=>{if(-1===o.indexOf(":-csstools-matches")&&-1===o.toLowerCase().indexOf(":is"))return o;const r=e().astSync(o);return r.walkPseudos((o=>{if(":is"===o.value.toLowerCase()&&o.nodes&&o.nodes.length&&"selector"===o.nodes[0].type&&0===o.nodes[0].nodes.length)return o.value=":not",void o.nodes[0].append(e.universal());if(":-csstools-matches"===o.value)if(!o.nodes||o.nodes.length){if(o.walkPseudos((o=>{if(e.isPseudoElement(o)){let e=o.value;if(e.startsWith("::-csstools-invalid-"))return;for(;e.startsWith(":");)e=e.slice(1);o.value=`::-csstools-invalid-${e}`,n()}})),1===o.nodes.length&&"selector"===o.nodes[0].type){if(1===o.nodes[0].nodes.length)return void o.replaceWith(o.nodes[0].nodes[0]);if(!o.nodes[0].some((e=>"combinator"===e.type)))return void o.replaceWith(...o.nodes[0].nodes)}1!==r.nodes.length||"selector"!==r.nodes[0].type||1!==r.nodes[0].nodes.length||r.nodes[0].nodes[0]!==o?childAdjacentChild(o.parent)||isInCompoundWithOneOtherElement(o.parent)||isPseudoInFirstCompound(o.parent)||("warning"===s.onComplexSelector&&t(),o.value=":is"):o.replaceWith(...o.nodes[0].nodes)}else o.remove()})),r.walk((e=>{"selector"===e.type&&"nodes"in e&&1===e.nodes.length&&"selector"===e.nodes[0].type&&e.replaceWith(e.nodes[0])})),r.walk((e=>{"nodes"in e&&sortCompoundSelectorsInsideComplexSelector(e)})),r.toString()})).filter((e=>!!e))}function splitSelectors(s,t,n=0){const r=":not(#"+t.specificityMatchingName+")",d=":not(."+t.specificityMatchingName+")",l=":not("+t.specificityMatchingName+")";return s.flatMap((s=>{if(-1===s.toLowerCase().indexOf(":is"))return s;let a=!1;const c=[];if(e().astSync(s).walkPseudos((e=>{if(":is"!==e.value.toLowerCase()||!e.nodes||!e.nodes.length)return;if("selector"===e.nodes[0].type&&0===e.nodes[0].nodes.length)return;if("pseudo"===e.parent?.parent?.type&&":not"===e.parent?.parent?.value?.toLowerCase())return void c.push([{start:e.parent.parent.sourceIndex,end:e.parent.parent.sourceIndex+e.parent.parent.toString().length,option:`:not(${e.nodes.toString()})`}]);if("pseudo"===e.parent?.parent?.type&&":has"===e.parent?.parent?.value?.toLowerCase())return void(e.value=":-csstools-matches");let s=e.parent;for(;s;){if(s.value&&":is"===s.value.toLowerCase()&&"pseudo"===s.type)return void(a=!0);s=s.parent}const t=o(e),n=e.sourceIndex,i=n+e.toString().length,p=[];e.nodes.forEach((e=>{const s={start:n,end:i,option:""},a=o(e);let c=e.toString().trim();const u=Math.max(0,t.a-a.a),h=Math.max(0,t.b-a.b),f=Math.max(0,t.c-a.c);for(let e=0;e<u;e++)c+=r;for(let e=0;e<h;e++)c+=d;for(let e=0;e<f;e++)c+=l;s.option=c,p.push(s)})),c.push(p)})),!c.length)return[s];let i=[];return cartesianProduct(...c).forEach((e=>{let o="";for(let t=0;t<e.length;t++){const n=e[t];o+=s.substring(e[t-1]?.end||0,e[t].start),o+=":-csstools-matches("+n.option+")",t===e.length-1&&(o+=s.substring(e[t].end))}i.push(o)})),a&&n<10&&(i=splitSelectors(i,t,n+1)),i})).filter((e=>!!e))}function cartesianProduct(...e){const o=[],s=e.length-1;return function helper(t,n){for(let r=0,d=e[n].length;r<d;r++){const d=t.slice(0);d.push(e[n][r]),n===s?o.push(d):helper(d,n+1)}}([],0),o}const t=/:is\(/i,creator=e=>{const o={specificityMatchingName:"does-not-exist",...e||{}};return{postcssPlugin:"postcss-is-pseudo-class",prepare(){const e=new WeakSet;return{postcssPlugin:"postcss-is-pseudo-class",Rule(s,{result:n}){if(!s.selector)return;if(!t.test(s.selector))return;if(e.has(s))return;let r=!1;const warnOnComplexSelector=()=>{"warning"===o.onComplexSelector&&(r||(r=!0,s.warn(n,`Complex selectors in '${s.selector}' can not be transformed to an equivalent selector without ':is()'.`)))};let d=!1;const warnOnPseudoElements=()=>{"warning"===o.onPseudoElement&&(d||(d=!0,s.warn(n,`Pseudo elements are not allowed in ':is()', unable to transform '${s.selector}'`)))};try{let t=!1;const n=[],r=complexSelectors(splitSelectors(s.selectors,{specificityMatchingName:o.specificityMatchingName}),{onComplexSelector:o.onComplexSelector},warnOnComplexSelector,warnOnPseudoElements);if(Array.from(new Set(r)).forEach((o=>{if(s.selectors.indexOf(o)>-1)n.push(o);else{if(alwaysValidSelector(o))return n.push(o),void(t=!0);e.add(s),s.cloneBefore({selector:o}),t=!0}})),n.length&&t&&(e.add(s),s.cloneBefore({selectors:n})),!o.preserve){if(!t)return;s.remove()}}catch(e){if(e.message.indexOf("call stack size exceeded")>-1)throw e;s.warn(n,`Failed to parse selector "${s.selector}"`)}}}}}};creator.postcss=!0;export{creator as default};
+import e from"postcss-selector-parser";import{selectorSpecificity as o}from"@csstools/selector-specificity";function alwaysValidSelector(o){const s=e().astSync(o);let t=!0;return s.walk((e=>{if("class"!==e.type&&"comment"!==e.type&&"id"!==e.type&&"root"!==e.type&&"selector"!==e.type&&"string"!==e.type&&"tag"!==e.type&&"universal"!==e.type&&("attribute"!==e.type||e.insensitive)&&("combinator"!==e.type||"+"!==e.value&&">"!==e.value&&"~"!==e.value&&" "!==e.value)&&("pseudo"!==e.type||e.nodes?.length||":hover"!==e.value.toLowerCase()&&":focus"!==e.value.toLowerCase())){if("pseudo"===e.type&&1===e.nodes?.length&&":not"===e.value.toLowerCase()){let o=!0;if(e.nodes[0].walkCombinators((()=>{o=!1})),o)return}return t=!1,!1}})),t}function sortCompoundSelectorsInsideComplexSelector(o){if(!o||!o.nodes||1===o.nodes.length)return;const s=[];let t=[];for(let n=0;n<o.nodes.length;n++)"combinator"!==o.nodes[n].type?e.isPseudoElement(o.nodes[n])?(s.push(t),t=[o.nodes[n]]):t.push(o.nodes[n]):(s.push(t),s.push([o.nodes[n]]),t=[]);s.push(t);const n=[];for(let e=0;e<s.length;e++){const o=s[e];o.sort(((e,o)=>"selector"===e.type&&"selector"===o.type&&e.nodes.length&&o.nodes.length?selectorTypeOrder(e.nodes[0],e.nodes[0].type)-selectorTypeOrder(o.nodes[0],o.nodes[0].type):"selector"===e.type&&e.nodes.length?selectorTypeOrder(e.nodes[0],e.nodes[0].type)-selectorTypeOrder(o,o.type):"selector"===o.type&&o.nodes.length?selectorTypeOrder(e,e.type)-selectorTypeOrder(o.nodes[0],o.nodes[0].type):selectorTypeOrder(e,e.type)-selectorTypeOrder(o,o.type)));const t=new Set(o.map((e=>e.type))),r=t.has("universal")&&(t.has("tag")||t.has("attribute")||t.has("class")||t.has("id")||t.has("pseudo"));for(let e=0;e<o.length;e++)"universal"===o[e].type&&r?o[e].remove():n.push(o[e])}for(let s=n.length-1;s>=0;s--){const t=n[s-1];if(n[s].remove(),t&&"tag"===t.type&&"tag"===n[s].type){const t=e.pseudo({value:":is",nodes:[e.selector({value:"",nodes:[n[s]]})]});o.prepend(t)}else o.prepend(n[s])}}function selectorTypeOrder(o,t){return e.isPseudoElement(o)?s.pseudoElement:s[t]}const s={universal:0,tag:1,pseudoElement:2,id:3,class:4,attribute:5,pseudo:6,selector:7,string:8,root:9,comment:10};function childAdjacentChild(e){return!(!e||!e.nodes)&&("selector"===e.type&&(3===e.nodes.length&&(!(!e.nodes[0]||"pseudo"!==e.nodes[0].type||":-csstools-matches"!==e.nodes[0].value)&&(!(!e.nodes[1]||"combinator"!==e.nodes[1].type||"+"!==e.nodes[1].value&&"~"!==e.nodes[1].value)&&(!(!e.nodes[2]||"pseudo"!==e.nodes[2].type||":-csstools-matches"!==e.nodes[2].value)&&(!(!e.nodes[0].nodes||1!==e.nodes[0].nodes.length)&&("selector"===e.nodes[0].nodes[0].type&&(!(!e.nodes[0].nodes[0].nodes||3!==e.nodes[0].nodes[0].nodes.length)&&(!(!e.nodes[0].nodes[0].nodes||"combinator"!==e.nodes[0].nodes[0].nodes[1].type||">"!==e.nodes[0].nodes[0].nodes[1].value)&&(!(!e.nodes[2].nodes||1!==e.nodes[2].nodes.length)&&("selector"===e.nodes[2].nodes[0].type&&(!(!e.nodes[2].nodes[0].nodes||3!==e.nodes[2].nodes[0].nodes.length)&&(!(!e.nodes[2].nodes[0].nodes||"combinator"!==e.nodes[2].nodes[0].nodes[1].type||">"!==e.nodes[2].nodes[0].nodes[1].value)&&(e.nodes[0].nodes[0].insertAfter(e.nodes[0].nodes[0].nodes[0],e.nodes[2].nodes[0].nodes[0].clone()),e.nodes[2].nodes[0].nodes[1].remove(),e.nodes[2].nodes[0].nodes[0].remove(),e.nodes[0].replaceWith(e.nodes[0].nodes[0]),e.nodes[2].replaceWith(e.nodes[2].nodes[0]),!0))))))))))))))}function isInCompoundWithOneOtherElement(o){if(!o||!o.nodes)return!1;if("selector"!==o.type)return!1;if(2!==o.nodes.length)return!1;let s,t;return o.nodes[0]&&"pseudo"===o.nodes[0].type&&":-csstools-matches"===o.nodes[0].value?(s=0,t=1):o.nodes[1]&&"pseudo"===o.nodes[1].type&&":-csstools-matches"===o.nodes[1].value&&(s=1,t=0),!!s&&(!!o.nodes[t]&&(("selector"!==o.nodes[t].type||!o.nodes[t].some((o=>"combinator"===o.type||e.isPseudoElement(o))))&&("combinator"!==o.nodes[t].type&&(o.nodes[s].nodes[0].append(o.nodes[t].clone()),o.nodes[s].replaceWith(...o.nodes[s].nodes[0].nodes),o.nodes[t].remove(),!0))))}function isPseudoInFirstCompound(e){if(!e||!e.nodes)return!1;if("selector"!==e.type)return!1;let o=-1;for(let s=0;s<e.nodes.length;s++){const t=e.nodes[s];if("combinator"===t.type)return!1;if("pseudo"===t.type&&":-csstools-matches"===t.value){if(!t.nodes||1!==t.nodes.length)return!1;o=s;break}}if(-1===o)return!1;const s=e.nodes.slice(0,o),t=e.nodes[o],n=e.nodes.slice(o+1);return s.forEach((e=>{t.nodes[0].append(e.clone())})),n.forEach((e=>{t.nodes[0].append(e.clone())})),t.replaceWith(...t.nodes),s.forEach((e=>{e.remove()})),n.forEach((e=>{e.remove()})),!0}function complexSelectors(o,s,t,n){return o.flatMap((o=>{if(-1===o.indexOf(":-csstools-matches")&&-1===o.toLowerCase().indexOf(":is"))return o;const r=e().astSync(o);return r.walkPseudos((o=>{if(":is"===o.value.toLowerCase()&&o.nodes&&o.nodes.length&&"selector"===o.nodes[0].type&&0===o.nodes[0].nodes.length)return o.value=":not",void o.nodes[0].append(e.universal());if(":-csstools-matches"===o.value)if(!o.nodes||o.nodes.length){if(o.walkPseudos((o=>{if(e.isPseudoElement(o)){let e=o.value;if(e.startsWith("::-csstools-invalid-"))return;for(;e.startsWith(":");)e=e.slice(1);o.value=`::-csstools-invalid-${e}`,n()}})),1===o.nodes.length&&"selector"===o.nodes[0].type){if(1===o.nodes[0].nodes.length)return void o.replaceWith(o.nodes[0].nodes[0]);if(!o.nodes[0].some((e=>"combinator"===e.type)))return void o.replaceWith(...o.nodes[0].nodes)}1!==r.nodes.length||"selector"!==r.nodes[0].type||1!==r.nodes[0].nodes.length||r.nodes[0].nodes[0]!==o?childAdjacentChild(o.parent)||isInCompoundWithOneOtherElement(o.parent)||isPseudoInFirstCompound(o.parent)||("warning"===s.onComplexSelector&&t(),o.value=":is"):o.replaceWith(...o.nodes[0].nodes)}else o.remove()})),r.walk((e=>{"selector"===e.type&&"nodes"in e&&1===e.nodes.length&&"selector"===e.nodes[0].type&&e.replaceWith(e.nodes[0])})),r.walk((e=>{"nodes"in e&&sortCompoundSelectorsInsideComplexSelector(e)})),r.toString()})).filter((e=>!!e))}function splitSelectors(s,t,n=0){const r=":not(#"+t.specificityMatchingName+")",d=":not(."+t.specificityMatchingName+")",l=":not("+t.specificityMatchingName+")";return s.flatMap((s=>{if(-1===s.toLowerCase().indexOf(":is"))return s;let a=!1;const c=[];if(e().astSync(s).walkPseudos((e=>{if(":is"!==e.value.toLowerCase()||!e.nodes||!e.nodes.length)return;if("selector"===e.nodes[0].type&&0===e.nodes[0].nodes.length)return;if("pseudo"===e.parent?.parent?.type&&":not"===e.parent?.parent?.value?.toLowerCase())return void c.push([{start:e.parent.parent.sourceIndex,end:e.parent.parent.sourceIndex+e.parent.parent.toString().length,option:`:not(${e.nodes.toString()})`}]);if("pseudo"===e.parent?.parent?.type&&":has"===e.parent?.parent?.value?.toLowerCase())return void(e.value=":-csstools-matches");let s=e.parent;for(;s;){if(s.value&&":is"===s.value.toLowerCase()&&"pseudo"===s.type)return void(a=!0);s=s.parent}const t=o(e),n=e.sourceIndex,i=n+e.toString().length,p=[];e.nodes.forEach((e=>{const s={start:n,end:i,option:""},a=o(e);let c=e.toString().trim();const u=Math.max(0,t.a-a.a),h=Math.max(0,t.b-a.b),f=Math.max(0,t.c-a.c);for(let e=0;e<u;e++)c+=r;for(let e=0;e<h;e++)c+=d;for(let e=0;e<f;e++)c+=l;s.option=c,p.push(s)})),c.push(p)})),!c.length)return[s];let i=[];return cartesianProduct(...c).forEach((e=>{let o="";for(let t=0;t<e.length;t++){const n=e[t];o+=s.substring(e[t-1]?.end||0,e[t].start),o+=":-csstools-matches("+n.option+")",t===e.length-1&&(o+=s.substring(e[t].end))}i.push(o)})),a&&n<10&&(i=splitSelectors(i,t,n+1)),i})).filter((e=>!!e))}function cartesianProduct(...e){const o=[],s=e.length-1;return function helper(t,n){for(let r=0,d=e[n].length;r<d;r++){const d=t.slice(0);d.push(e[n][r]),n===s?o.push(d):helper(d,n+1)}}([],0),o}const t=/:is\(/i,creator=e=>{const o={specificityMatchingName:"does-not-exist",...e||{}};return{postcssPlugin:"postcss-is-pseudo-class",prepare(){const e=new WeakSet;return{postcssPlugin:"postcss-is-pseudo-class",Rule(s,{result:n}){if(!s.selector)return;if(!t.test(s.selector))return;if(e.has(s))return;let r=!1;const warnOnComplexSelector=()=>{"warning"===o.onComplexSelector&&(r||(r=!0,s.warn(n,`Complex selectors in '${s.selector}' can not be transformed to an equivalent selector without ':is()'.`)))};let d=!1;const warnOnPseudoElements=()=>{"warning"===o.onPseudoElement&&(d||(d=!0,s.warn(n,`Pseudo elements are not allowed in ':is()', unable to transform '${s.selector}'`)))};try{let t=!1;const n=[],r=complexSelectors(splitSelectors(s.selectors,{specificityMatchingName:o.specificityMatchingName}),{onComplexSelector:o.onComplexSelector},warnOnComplexSelector,warnOnPseudoElements);if(Array.from(new Set(r)).forEach((o=>{if(s.selectors.indexOf(o)>-1)n.push(o);else{if(alwaysValidSelector(o))return n.push(o),void(t=!0);e.add(s),s.cloneBefore({selector:o}),t=!0}})),n.length&&t&&(e.add(s),s.cloneBefore({selectors:n})),!o.preserve){if(!t)return;s.remove()}}catch(e){if(e.message.indexOf("call stack size exceeded")>-1)throw e;s.warn(n,`Failed to parse selector "${s.selector}" with error: ${e.message}`)}}}}}};creator.postcss=!0;export{creator as default};
diff --git a/plugins/postcss-is-pseudo-class/src/index.ts b/plugins/postcss-is-pseudo-class/src/index.ts
index 5d7b13ff8..1cc9db81d 100644
--- a/plugins/postcss-is-pseudo-class/src/index.ts
+++ b/plugins/postcss-is-pseudo-class/src/index.ts
@@ -145,7 +145,7 @@ const creator: PluginCreator<pluginOptions> = (opts?: pluginOptions) => {
 							throw err;
 						}
 
-						rule.warn(result, `Failed to parse selector "${rule.selector}"`);
+						rule.warn(result, `Failed to parse selector "${rule.selector}" with error: ${err.message}`);
 					}
 				},
 			};
diff --git a/plugins/postcss-is-pseudo-class/test/basic.css b/plugins/postcss-is-pseudo-class/test/basic.css
index bf5d3c23d..3817c225d 100644
--- a/plugins/postcss-is-pseudo-class/test/basic.css
+++ b/plugins/postcss-is-pseudo-class/test/basic.css
@@ -173,3 +173,7 @@ header:is(.a .b) {
 :has(:is(.foo .bar) .fooz) {
 	color: green;
 }
+
+:is(:nth-child(2n+1 of .foo), .foo) {
+	color: green;
+}
diff --git a/plugins/postcss-is-pseudo-class/test/basic.does-not-exist.expect.css b/plugins/postcss-is-pseudo-class/test/basic.does-not-exist.expect.css
index b6087d462..c2e04eaeb 100644
--- a/plugins/postcss-is-pseudo-class/test/basic.does-not-exist.expect.css
+++ b/plugins/postcss-is-pseudo-class/test/basic.does-not-exist.expect.css
@@ -273,3 +273,11 @@ input:hover, input:focus, button:hover, button:focus {
 :has(:is(.foo .bar) .fooz) {
 	color: green;
 }
+
+:nth-child(2n+1 of .foo) {
+	color: green;
+}
+
+.foo:not(.something-random) {
+	color: green;
+}
diff --git a/plugins/postcss-is-pseudo-class/test/basic.expect.css b/plugins/postcss-is-pseudo-class/test/basic.expect.css
index 768dda588..bb3c858c8 100644
--- a/plugins/postcss-is-pseudo-class/test/basic.expect.css
+++ b/plugins/postcss-is-pseudo-class/test/basic.expect.css
@@ -273,3 +273,11 @@ input:hover, input:focus, button:hover, button:focus {
 :has(:is(.foo .bar) .fooz) {
 	color: green;
 }
+
+:nth-child(2n+1 of .foo) {
+	color: green;
+}
+
+.foo:not(.does-not-exist) {
+	color: green;
+}
diff --git a/plugins/postcss-is-pseudo-class/test/basic.oncomplex.no-warning.expect.css b/plugins/postcss-is-pseudo-class/test/basic.oncomplex.no-warning.expect.css
index 768dda588..bb3c858c8 100644
--- a/plugins/postcss-is-pseudo-class/test/basic.oncomplex.no-warning.expect.css
+++ b/plugins/postcss-is-pseudo-class/test/basic.oncomplex.no-warning.expect.css
@@ -273,3 +273,11 @@ input:hover, input:focus, button:hover, button:focus {
 :has(:is(.foo .bar) .fooz) {
 	color: green;
 }
+
+:nth-child(2n+1 of .foo) {
+	color: green;
+}
+
+.foo:not(.does-not-exist) {
+	color: green;
+}
diff --git a/plugins/postcss-is-pseudo-class/test/basic.oncomplex.warning.expect.css b/plugins/postcss-is-pseudo-class/test/basic.oncomplex.warning.expect.css
index 768dda588..bb3c858c8 100644
--- a/plugins/postcss-is-pseudo-class/test/basic.oncomplex.warning.expect.css
+++ b/plugins/postcss-is-pseudo-class/test/basic.oncomplex.warning.expect.css
@@ -273,3 +273,11 @@ input:hover, input:focus, button:hover, button:focus {
 :has(:is(.foo .bar) .fooz) {
 	color: green;
 }
+
+:nth-child(2n+1 of .foo) {
+	color: green;
+}
+
+.foo:not(.does-not-exist) {
+	color: green;
+}
diff --git a/plugins/postcss-is-pseudo-class/test/basic.preserve.expect.css b/plugins/postcss-is-pseudo-class/test/basic.preserve.expect.css
index c597a4ae2..032584e03 100644
--- a/plugins/postcss-is-pseudo-class/test/basic.preserve.expect.css
+++ b/plugins/postcss-is-pseudo-class/test/basic.preserve.expect.css
@@ -417,3 +417,15 @@ header:is(.a .b) {
 :has(:is(.foo .bar) .fooz) {
 	color: green;
 }
+
+:nth-child(2n+1 of .foo) {
+	color: green;
+}
+
+.foo:not(.does-not-exist) {
+	color: green;
+}
+
+:is(:nth-child(2n+1 of .foo), .foo) {
+	color: green;
+}
diff --git a/plugins/postcss-is-pseudo-class/test/basic.with-cloned-declarations.expect.css b/plugins/postcss-is-pseudo-class/test/basic.with-cloned-declarations.expect.css
index f398f4cda..301348a84 100644
--- a/plugins/postcss-is-pseudo-class/test/basic.with-cloned-declarations.expect.css
+++ b/plugins/postcss-is-pseudo-class/test/basic.with-cloned-declarations.expect.css
@@ -419,3 +419,15 @@ header:is(.a .b) {
 :has(:is(.foo .bar) .fooz) {
 	color: green;
 }
+
+:nth-child(2n+1 of .foo) {
+	color: green;
+}
+
+.foo:not(.does-not-exist) {
+	color: green;
+}
+
+:is(:nth-child(2n+1 of .foo), .foo) {
+	color: green;
+}