the-forest/client/node_modules/csso/dist/csso.js

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a=e.sourceContentFor(r);null!=a&&n.setSourceContent(r,a);})),n},ur.prototype.addMapping=function(e){var t=nr.getArg(e,"generated"),n=nr.getArg(e,"original",null),r=nr.getArg(e,"source",null),i=nr.getArg(e,"name",null);this._skipValidation||this._validateMapping(t,n,r,i),null!=r&&(r=String(r),this._sources.has(r)||this._sources.add(r)),null!=i&&(i=String(i),this._names.has(i)||this._names.add(i)),this._mappings.add({generatedLine:t.line,generatedColumn:t.column,originalLine:null!=n&&n.line,originalColumn:null!=n&&n.column,source:r,name:i});},ur.prototype.setSourceContent=function(e,t){var n=e;null!=this._sourceRoot&&(n=nr.relative(this._sourceRoot,n)),null!=t?(this._sourcesContents||(this._sourcesContents=Object.create(null)),this._sourcesContents[nr.toSetString(n)]=t):this._sourcesContents&&(delete this._sourcesContents[nr.toSetString(n)],0===Object.keys(this._sourcesContents).length&&(this._sourcesContents=null));},ur.prototype.applySourceMap=function(e,t,n){var 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this.eat(qi),{type:"CDC",loc:this.getLocation(e,this.scanner.tokenStart)}},generate:function(){this.chunk("--\x3e");}},Ui=Ce.TYPE.CDO,Hi={name:"CDO",structure:[],parse:function(){var e=this.scanner.tokenStart;return this.eat(Ui),{type:"CDO",loc:this.getLocation(e,this.scanner.tokenStart)}},generate:function(){this.chunk("\x3c!--");}},Vi=Ce.TYPE.Ident,Ki={name:"ClassSelector",structure:{name:String},parse:function(){return this.scanner.isDelim(46)||this.error("Full stop is expected"),this.scanner.next(),{type:"ClassSelector",loc:this.getLocation(this.scanner.tokenStart-1,this.scanner.tokenEnd),name:this.consume(Vi)}},generate:function(e){this.chunk("."),this.chunk(e.name);}},Gi=Ce.TYPE.Ident,Qi={name:"Combinator",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;switch(this.scanner.source.charCodeAt(this.scanner.tokenStart)){case 62:case 43:case 126:this.scanner.next();break;case 47:this.scanner.next(),this.scanner.tokenType===Gi&&!1!==this.scanner.lookupValue(0,"deep")||this.error("Identifier `deep` is expected"),this.scanner.next(),this.scanner.isDelim(47)||this.error("Solidus is expected"),this.scanner.next();break;default:this.error("Combinator is expected");}return {type:"Combinator",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.name);}},Xi=Ce.TYPE.Comment,Zi={name:"Comment",structure:{value:String},parse:function(){var e=this.scanner.tokenStart,t=this.scanner.tokenEnd;return this.eat(Xi),t-e+2>=2&&42===this.scanner.source.charCodeAt(t-2)&&47===this.scanner.source.charCodeAt(t-1)&&(t-=2),{type:"Comment",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e+2,t)}},generate:function(e){this.chunk("/*"),this.chunk(e.value),this.chunk("*/");}},$i=ae.isCustomProperty,Ji=Ce.TYPE,ea=ni.mode,ta=Ji.Ident,na=Ji.Hash,ra=Ji.Colon,ia=Ji.Semicolon,aa=Ji.Delim,oa=Ji.WhiteSpace;function sa(e){return this.Raw(e,ea.exclamationMarkOrSemicolon,!0)}function la(e){return this.Raw(e,ea.exclamationMarkOrSemicolon,!1)}function ca(){var e=this.scanner.tokenIndex,t=this.Value();return "Raw"!==t.type&&!1===this.scanner.eof&&this.scanner.tokenType!==ia&&!1===this.scanner.isDelim(33)&&!1===this.scanner.isBalanceEdge(e)&&this.error(),t}var ua={name:"Declaration",structure:{important:[Boolean,String],property:String,value:["Value","Raw"]},parse:function(){var e,t=this.scanner.tokenStart,n=this.scanner.tokenIndex,r=ha.call(this),i=$i(r),a=i?this.parseCustomProperty:this.parseValue,o=i?la:sa,s=!1;this.scanner.skipSC(),this.eat(ra);const l=this.scanner.tokenIndex;if(i||this.scanner.skipSC(),e=a?this.parseWithFallback(ca,o):o.call(this,this.scanner.tokenIndex),i&&"Value"===e.type&&e.children.isEmpty())for(let t=l-this.scanner.tokenIndex;t<=0;t++)if(this.scanner.lookupType(t)===oa){e.children.appendData({type:"WhiteSpace",loc:null,value:" "});break}return this.scanner.isDelim(33)&&(s=pa.call(this),this.scanner.skipSC()),!1===this.scanner.eof&&this.scanner.tokenType!==ia&&!1===this.scanner.isBalanceEdge(n)&&this.error(),{type:"Declaration",loc:this.getLocation(t,this.scanner.tokenStart),important:s,property:r,value:e}},generate:function(e){this.chunk(e.property),this.chunk(":"),this.node(e.value),e.important&&this.chunk(!0===e.important?"!important":"!"+e.important);},walkContext:"declaration"};function ha(){var e=this.scanner.tokenStart;if(this.scanner.tokenType===aa)switch(this.scanner.source.charCodeAt(this.scanner.tokenStart)){case 42:case 36:case 43:case 35:case 38:this.scanner.next();break;case 47:this.scanner.next(),this.scanner.isDelim(47)&&this.scanner.next();}return this.scanner.tokenType===na?this.eat(na):this.eat(ta),this.scanner.substrToCursor(e)}function pa(){this.eat(aa),this.scanner.skipSC();var e=this.consume(ta);return "important"===e||e}var da=Ce.TYPE,ma=ni.mode,ga=da.WhiteSpace,fa=da.Comment,ba=da.Semicolon;function ya(e){return this.Raw(e,ma.semicolonIncluded,!0)}var ka={name:"DeclarationList",structure:{children:[["Declaration"]]},parse:function(){for(var e=this.createList();!this.scanner.eof;)switch(this.scanner.tokenType){case ga:case fa:case ba:this.scanner.next();break;default:e.push(this.parseWithFallback(this.Declaration,ya));}return {type:"DeclarationList",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e,(function(e){"Declaration"===e.type&&this.chunk(";");}));}},va=M.consumeNumber,xa=Ce.TYPE.Dimension,wa={name:"Dimension",structure:{value:String,unit:String},parse:function(){var e=this.scanner.tokenStart,t=va(this.scanner.source,e);return this.eat(xa),{type:"Dimension",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e,t),unit:this.scanner.source.substring(t,this.scanner.tokenStart)}},generate:function(e){this.chunk(e.value),this.chunk(e.unit);}},Sa=Ce.TYPE.RightParenthesis,Ca={name:"Function",structure:{name:String,children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart,i=this.consumeFunctionName(),a=i.toLowerCase();return n=t.hasOwnProperty(a)?t[a].call(this,t):e.call(this,t),this.scanner.eof||this.eat(Sa),{type:"Function",loc:this.getLocation(r,this.scanner.tokenStart),name:i,children:n}},generate:function(e){this.chunk(e.name),this.chunk("("),this.children(e),this.chunk(")");},walkContext:"function"},za=Ce.TYPE.Hash,Aa={name:"Hash",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return this.eat(za),{type:"Hash",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e+1)}},generate:function(e){this.chunk("#"),this.chunk(e.value);}},Pa=Ce.TYPE.Ident,Ta={name:"Identifier",structure:{name:String},parse:function(){return {type:"Identifier",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),name:this.consume(Pa)}},generate:function(e){this.chunk(e.name);}},La=Ce.TYPE.Hash,Ea={name:"IdSelector",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;return this.eat(La),{type:"IdSelector",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e+1)}},generate:function(e){this.chunk("#"),this.chunk(e.name);}},Da=Ce.TYPE,Oa=Da.Ident,Ba=Da.Number,Ia=Da.Dimension,Na=Da.LeftParenthesis,Ra=Da.RightParenthesis,Ma=Da.Colon,ja=Da.Delim,_a={name:"MediaFeature",structure:{name:String,value:["Identifier","Number","Dimension","Ratio",null]},parse:function(){var e,t=this.scanner.tokenStart,n=null;if(this.eat(Na),this.scanner.skipSC(),e=this.consume(Oa),this.scanner.skipSC(),this.scanner.tokenType!==Ra){switch(this.eat(Ma),this.scanner.skipSC(),this.scanner.tokenType){case Ba:n=this.lookupNonWSType(1)===ja?this.Ratio():this.Number();break;case Ia:n=this.Dimension();break;case Oa:n=this.Identifier();break;default:this.error("Number, dimension, ratio or identifier is expected");}this.scanner.skipSC();}return this.eat(Ra),{type:"MediaFeature",loc:this.getLocation(t,this.scanner.tokenStart),name:e,value:n}},generate:function(e){this.chunk("("),this.chunk(e.name),null!==e.value&&(this.chunk(":"),this.node(e.value)),this.chunk(")");}},Fa=Ce.TYPE,Wa=Fa.WhiteSpace,qa=Fa.Comment,Ya=Fa.Ident,Ua=Fa.LeftParenthesis,Ha={name:"MediaQuery",structure:{children:[["Identifier","MediaFeature","WhiteSpace"]]},parse:function(){this.scanner.skipSC();var e=this.createList(),t=null,n=null;e:for(;!this.scanner.eof;){switch(this.scanner.tokenType){case qa:this.scanner.next();continue;case Wa:n=this.WhiteSpace();continue;case Ya:t=this.Identifier();break;case Ua:t=this.MediaFeature();break;default:break e}null!==n&&(e.push(n),n=null),e.push(t);}return null===t&&this.error("Identifier or parenthesis is expected"),{type:"MediaQuery",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e);}},Va=Ce.TYPE.Comma,Ka={name:"MediaQueryList",structure:{children:[["MediaQuery"]]},parse:function(e){var t=this.createList();for(this.scanner.skipSC();!this.scanner.eof&&(t.push(this.MediaQuery(e)),this.scanner.tokenType===Va);)this.scanner.next();return {type:"MediaQueryList",loc:this.getLocationFromList(t),children:t}},generate:function(e){this.children(e,(function(){this.chunk(",");}));}},Ga=Ce.TYPE.Number,Qa={name:"Number",structure:{value:String},parse:function(){return {type:"Number",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),value:this.consume(Ga)}},generate:function(e){this.chunk(e.value);}},Xa={name:"Operator",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return this.scanner.next(),{type:"Operator",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.value);}},Za=Ce.TYPE,$a=Za.LeftParenthesis,Ja=Za.RightParenthesis,eo={name:"Parentheses",structure:{children:[[]]},parse:function(e,t){var n,r=this.scanner.tokenStart;return this.eat($a),n=e.call(this,t),this.scanner.eof||this.eat(Ja),{type:"Parentheses",loc:this.getLocation(r,this.scanner.tokenStart),children:n}},generate:function(e){this.chunk("("),this.children(e),this.chunk(")");}},to=M.consumeNumber,no=Ce.TYPE.Percentage,ro={name:"Percentage",structure:{value:String},parse:function(){var e=this.scanner.tokenStart,t=to(this.scanner.source,e);return this.eat(no),{type:"Percentage",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.source.substring(e,t)}},generate:function(e){this.chunk(e.value),this.chunk("%");}},io=Ce.TYPE,ao=io.Ident,oo=io.Function,so=io.Colon,lo=io.RightParenthesis,co={name:"PseudoClassSelector",structure:{name:String,children:[["Raw"],null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null;return this.eat(so),this.scanner.tokenType===oo?(t=(e=this.consumeFunctionName()).toLowerCase(),this.pseudo.hasOwnProperty(t)?(this.scanner.skipSC(),r=this.pseudo[t].call(this),this.scanner.skipSC()):(r=this.createList()).push(this.Raw(this.scanner.tokenIndex,null,!1)),this.eat(lo)):e=this.consume(ao),{type:"PseudoClassSelector",loc:this.getLocation(n,this.scanner.tokenStart),name:e,children:r}},generate:function(e){this.chunk(":"),this.chunk(e.name),null!==e.children&&(this.chunk("("),this.children(e),this.chunk(")"));},walkContext:"function"},uo=Ce.TYPE,ho=uo.Ident,po=uo.Function,mo=uo.Colon,go=uo.RightParenthesis,fo={name:"PseudoElementSelector",structure:{name:String,children:[["Raw"],null]},parse:function(){var e,t,n=this.scanner.tokenStart,r=null;return this.eat(mo),this.eat(mo),this.scanner.tokenType===po?(t=(e=this.consumeFunctionName()).toLowerCase(),this.pseudo.hasOwnProperty(t)?(this.scanner.skipSC(),r=this.pseudo[t].call(this),this.scanner.skipSC()):(r=this.createList()).push(this.Raw(this.scanner.tokenIndex,null,!1)),this.eat(go)):e=this.consume(ho),{type:"PseudoElementSelector",loc:this.getLocation(n,this.scanner.tokenStart),name:e,children:r}},generate:function(e){this.chunk("::"),this.chunk(e.name),null!==e.children&&(this.chunk("("),this.children(e),this.chunk(")"));},walkContext:"function"},bo=Ce.isDigit,yo=Ce.TYPE,ko=yo.Number,vo=yo.Delim;function xo(){this.scanner.skipWS();for(var e=this.consume(ko),t=0;t<e.length;t++){var n=e.charCodeAt(t);bo(n)||46===n||this.error("Unsigned number is expected",this.scanner.tokenStart-e.length+t);}return 0===Number(e)&&this.error("Zero number is not allowed",this.scanner.tokenStart-e.length),e}var wo={name:"Ratio",structure:{left:String,right:String},parse:function(){var e,t=this.scanner.tokenStart,n=xo.call(this);return this.scanner.skipWS(),this.scanner.isDelim(47)||this.error("Solidus is expected"),this.eat(vo),e=xo.call(this),{type:"Ratio",loc:this.getLocation(t,this.scanner.tokenStart),left:n,right:e}},generate:function(e){this.chunk(e.left),this.chunk("/"),this.chunk(e.right);}},So=Ce.TYPE,Co=ni.mode,zo=So.LeftCurlyBracket;function Ao(e){return this.Raw(e,Co.leftCurlyBracket,!0)}function Po(){var e=this.SelectorList();return "Raw"!==e.type&&!1===this.scanner.eof&&this.scanner.tokenType!==zo&&this.error(),e}var To={name:"Rule",structure:{prelude:["SelectorList","Raw"],block:["Block"]},parse:function(){var e,t,n=this.scanner.tokenIndex,r=this.scanner.tokenStart;return e=this.parseRulePrelude?this.parseWithFallback(Po,Ao):Ao.call(this,n),t=this.Block(!0),{type:"Rule",loc:this.getLocation(r,this.scanner.tokenStart),prelude:e,block:t}},generate:function(e){this.node(e.prelude),this.node(e.block);},walkContext:"rule"},Lo=Ce.TYPE.Comma,Eo={name:"SelectorList",structure:{children:[["Selector","Raw"]]},parse:function(){for(var e=this.createList();!this.scanner.eof&&(e.push(this.Selector()),this.scanner.tokenType===Lo);)this.scanner.next();return {type:"SelectorList",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e,(function(){this.chunk(",");}));},walkContext:"selector"},Do=Ce.TYPE.String,Oo={name:"String",structure:{value:String},parse:function(){return {type:"String",loc:this.getLocation(this.scanner.tokenStart,this.scanner.tokenEnd),value:this.consume(Do)}},generate:function(e){this.chunk(e.value);}},Bo=Ce.TYPE,Io=Bo.WhiteSpace,No=Bo.Comment,Ro=Bo.AtKeyword,Mo=Bo.CDO,jo=Bo.CDC;function _o(e){return this.Raw(e,null,!1)}var Fo={name:"StyleSheet",structure:{children:[["Comment","CDO","CDC","Atrule","Rule","Raw"]]},parse:function(){for(var e,t=this.scanner.tokenStart,n=this.createList();!this.scanner.eof;){switch(this.scanner.tokenType){case Io:this.scanner.next();continue;case No:if(33!==this.scanner.source.charCodeAt(this.scanner.tokenStart+2)){this.scanner.next();continue}e=this.Comment();break;case Mo:e=this.CDO();break;case jo:e=this.CDC();break;case Ro:e=this.parseWithFallback(this.Atrule,_o);break;default:e=this.parseWithFallback(this.Rule,_o);}n.push(e);}return {type:"StyleSheet",loc:this.getLocation(t,this.scanner.tokenStart),children:n}},generate:function(e){this.children(e);},walkContext:"stylesheet"},Wo=Ce.TYPE.Ident;function qo(){this.scanner.tokenType!==Wo&&!1===this.scanner.isDelim(42)&&this.error("Identifier or asterisk is expected"),this.scanner.next();}var Yo={name:"TypeSelector",structure:{name:String},parse:function(){var e=this.scanner.tokenStart;return this.scanner.isDelim(124)?(this.scanner.next(),qo.call(this)):(qo.call(this),this.scanner.isDelim(124)&&(this.scanner.next(),qo.call(this))),{type:"TypeSelector",loc:this.getLocation(e,this.scanner.tokenStart),name:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.name);}},Uo=Ce.isHexDigit,Ho=Ce.cmpChar,Vo=Ce.TYPE,Ko=Ce.NAME,Go=Vo.Ident,Qo=Vo.Number,Xo=Vo.Dimension;function Zo(e,t){for(var n=this.scanner.tokenStart+e,r=0;n<this.scanner.tokenEnd;n++){var i=this.scanner.source.charCodeAt(n);if(45===i&&t&&0!==r)return 0===Zo.call(this,e+r+1,!1)&&this.error(),-1;Uo(i)||this.error(t&&0!==r?"HyphenMinus"+(r<6?" or hex digit":"")+" is expected":r<6?"Hex digit is expected":"Unexpected input",n),++r>6&&this.error("Too many hex digits",n);}return this.scanner.next(),r}function $o(e){for(var t=0;this.scanner.isDelim(63);)++t>e&&this.error("Too many question marks"),this.scanner.next();}function Jo(e){this.scanner.source.charCodeAt(this.scanner.tokenStart)!==e&&this.error(Ko[e]+" is expected");}function es(){var e=0;return this.scanner.isDelim(43)?(this.scanner.next(),this.scanner.tokenType===Go?void((e=Zo.call(this,0,!0))>0&&$o.call(this,6-e)):this.scanner.isDelim(63)?(this.scanner.next(),void $o.call(this,5)):void this.error("Hex digit or question mark is expected")):this.scanner.tokenType===Qo?(Jo.call(this,43),e=Zo.call(this,1,!0),this.scanner.isDelim(63)?void $o.call(this,6-e):this.scanner.tokenType===Xo||this.scanner.tokenType===Qo?(Jo.call(this,45),void Zo.call(this,1,!1)):void 0):this.scanner.tokenType===Xo?(Jo.call(this,43),void((e=Zo.call(this,1,!0))>0&&$o.call(this,6-e))):void this.error()}var ts={name:"UnicodeRange",structure:{value:String},parse:function(){var e=this.scanner.tokenStart;return Ho(this.scanner.source,e,117)||this.error("U is expected"),Ho(this.scanner.source,e+1,43)||this.error("Plus sign is expected"),this.scanner.next(),es.call(this),{type:"UnicodeRange",loc:this.getLocation(e,this.scanner.tokenStart),value:this.scanner.substrToCursor(e)}},generate:function(e){this.chunk(e.value);}},ns=Ce.isWhiteSpace,rs=Ce.cmpStr,is=Ce.TYPE,as=is.Function,os=is.Url,ss=is.RightParenthesis,ls={name:"Url",structure:{value:["String","Raw"]},parse:function(){var e,t=this.scanner.tokenStart;switch(this.scanner.tokenType){case os:for(var n=t+4,r=this.scanner.tokenEnd-1;n<r&&ns(this.scanner.source.charCodeAt(n));)n++;for(;n<r&&ns(this.scanner.source.charCodeAt(r-1));)r--;e={type:"Raw",loc:this.getLocation(n,r),value:this.scanner.source.substring(n,r)},this.eat(os);break;case as:rs(this.scanner.source,this.scanner.tokenStart,this.scanner.tokenEnd,"url(")||this.error("Function name must be `url`"),this.eat(as),this.scanner.skipSC(),e=this.String(),this.scanner.skipSC(),this.eat(ss);break;default:this.error("Url or Function is expected");}return {type:"Url",loc:this.getLocation(t,this.scanner.tokenStart),value:e}},generate:function(e){this.chunk("url"),this.chunk("("),this.node(e.value),this.chunk(")");}},cs=Ce.TYPE.WhiteSpace,us=Object.freeze({type:"WhiteSpace",loc:null,value:" "}),hs={AnPlusB:Gr,Atrule:hi,AtrulePrelude:gi,AttributeSelector:Ci,Block:Mi,Brackets:Wi,CDC:Yi,CDO:Hi,ClassSelector:Ki,Combinator:Qi,Comment:Zi,Declaration:ua,DeclarationList:ka,Dimension:wa,Function:Ca,Hash:Aa,Identifier:Ta,IdSelector:Ea,MediaFeature:_a,MediaQuery:Ha,MediaQueryList:Ka,Nth:{name:"Nth",structure:{nth:["AnPlusB","Identifier"],selector:["SelectorList",null]},parse:function(e){this.scanner.skipSC();var t,n=this.scanner.tokenStart,r=n,i=null;return t=this.scanner.lookupValue(0,"odd")||this.scanner.lookupValue(0,"even")?this.Identifier():this.AnPlusB(),this.scanner.skipSC(),e&&this.scanner.lookupValue(0,"of")?(this.scanner.next(),i=this.SelectorList(),this.needPositions&&(r=this.getLastListNode(i.children).loc.end.offset)):this.needPositions&&(r=t.loc.end.offset),{type:"Nth",loc:this.getLocation(n,r),nth:t,selector:i}},generate:function(e){this.node(e.nth),null!==e.selector&&(this.chunk(" of "),this.node(e.selector));}},Number:Qa,Operator:Xa,Parentheses:eo,Percentage:ro,PseudoClassSelector:co,PseudoElementSelector:fo,Ratio:wo,Raw:ni,Rule:To,Selector:{name:"Selector",structure:{children:[["TypeSelector","IdSelector","ClassSelector","AttributeSelector","PseudoClassSelector","PseudoElementSelector","Combinator","WhiteSpace"]]},parse:function(){var e=this.readSequence(this.scope.Selector);return null===this.getFirstListNode(e)&&this.error("Selector is expected"),{type:"Selector",loc:this.getLocationFromList(e),children:e}},generate:function(e){this.children(e);}},SelectorList:Eo,String:Oo,StyleSheet:Fo,TypeSelector:Yo,UnicodeRange:ts,Url:ls,Value:{name:"Value",structure:{children:[[]]},parse:function(){var e=this.scanner.tokenStart,t=this.readSequence(this.scope.Value);return {type:"Value",loc:this.getLocation(e,this.scanner.tokenStart),children:t}},generate:function(e){this.children(e);}},WhiteSpace:{name:"WhiteSpace",structure:{value:String},parse:function(){return this.eat(cs),us},generate:function(e){this.chunk(e.value);}}},ps={generic:!0,types:Nr.types,atrules:Nr.atrules,properties:Nr.properties,node:hs},ds=Ce.cmpChar,ms=Ce.cmpStr,gs=Ce.TYPE,fs=gs.Ident,bs=gs.String,ys=gs.Number,ks=gs.Function,vs=gs.Url,xs=gs.Hash,ws=gs.Dimension,Ss=gs.Percentage,Cs=gs.LeftParenthesis,zs=gs.LeftSquareBracket,As=gs.Comma,Ps=gs.Delim,Ts=function(e){switch(this.scanner.tokenType){case xs:return this.Hash();case As:return e.space=null,e.ignoreWSAfter=!0,this.Operator();case Cs:return this.Parentheses(this.readSequence,e.recognizer);case zs:return this.Brackets(this.readSequence,e.recognizer);case bs:return this.String();case ws:return this.Dimension();case Ss:return this.Percentage();case ys:return this.Number();case ks:return ms(this.scanner.source,this.scanner.tokenStart,this.scanner.tokenEnd,"url(")?this.Url():this.Function(this.readSequence,e.recognizer);case vs:return this.Url();case fs:return ds(this.scanner.source,this.scanner.tokenStart,117)&&ds(this.scanner.source,this.scanner.tokenStart+1,43)?this.UnicodeRange():this.Identifier();case Ps:var t=this.scanner.source.charCodeAt(this.scanner.tokenStart);if(47===t||42===t||43===t||45===t)return this.Operator();35===t&&this.error("Hex or identifier is expected",this.scanner.tokenStart+1);}},Ls={getNode:Ts},Es=Ce.TYPE,Ds=Es.Delim,Os=Es.Ident,Bs=Es.Dimension,Is=Es.Percentage,Ns=Es.Number,Rs=Es.Hash,Ms=Es.Colon,js=Es.LeftSquareBracket;var _s={getNode:function(e){switch(this.scanner.tokenType){case js:return this.AttributeSelector();case Rs:return this.IdSelector();case Ms:return this.scanner.lookupType(1)===Ms?this.PseudoElementSelector():this.PseudoClassSelector();case Os:return this.TypeSelector();case Ns:case Is:return this.Percentage();case Bs:46===this.scanner.source.charCodeAt(this.scanner.tokenStart)&&this.error("Identifier is expected",this.scanner.tokenStart+1);break;case Ds:switch(this.scanner.source.charCodeAt(this.scanner.tokenStart)){case 43:case 62:case 126:return e.space=null,e.ignoreWSAfter=!0,this.Combinator();case 47:return this.Combinator();case 46:return this.ClassSelector();case 42:case 124:return this.TypeSelector();case 35:return this.IdSelector()}}}},Fs=Ce.TYPE,Ws=ni.mode,qs=Fs.Comma,Ys=Fs.WhiteSpace,Us={AtrulePrelude:Ls,Selector:_s,Value:{getNode:Ts,expression:function(){return this.createSingleNodeList(this.Raw(this.scanner.tokenIndex,null,!1))},var:function(){var e=this.createList();if(this.scanner.skipSC(),e.push(this.Identifier()),this.scanner.skipSC(),this.scanner.tokenType===qs){e.push(this.Operator());const t=this.scanner.tokenIndex,n=this.parseCustomProperty?this.Value(null):this.Raw(this.scanner.tokenIndex,Ws.exclamationMarkOrSemicolon,!1);if("Value"===n.type&&n.children.isEmpty())for(let e=t-this.scanner.tokenIndex;e<=0;e++)if(this.scanner.lookupType(e)===Ys){n.children.appendData({type:"WhiteSpace",loc:null,value:" "});break}e.push(n);}return e}}},Hs=Ce.TYPE,Vs=Hs.String,Ks=Hs.Ident,Gs=Hs.Url,Qs=Hs.Function,Xs=Hs.LeftParenthesis,Zs={parse:{prelude:function(){var e=this.createList();switch(this.scanner.skipSC(),this.scanner.tokenType){case Vs:e.push(this.String());break;case Gs:case Qs:e.push(this.Url());break;default:this.error("String or url() is expected");}return this.lookupNonWSType(0)!==Ks&&this.lookupNonWSType(0)!==Xs||(e.push(this.WhiteSpace()),e.push(this.MediaQueryList())),e},block:null}},$s=Ce.TYPE,Js=$s.WhiteSpace,el=$s.Comment,tl=$s.Ident,nl=$s.Function,rl=$s.Colon,il=$s.LeftParenthesis;function al(){return this.createSingleNodeList(this.Raw(this.scanner.tokenIndex,null,!1))}function ol(){return this.scanner.skipSC(),this.scanner.tokenType===tl&&this.lookupNonWSType(1)===rl?this.createSingleNodeList(this.Declaration()):sl.call(this)}function sl(){var e,t=this.createList(),n=null;this.scanner.skipSC();e:for(;!this.scanner.eof;){switch(this.scanner.tokenType){case Js:n=this.WhiteSpace();continue;case el:this.scanner.next();continue;case nl:e=this.Function(al,this.scope.AtrulePrelude);break;case tl:e=this.Identifier();break;case il:e=this.Parentheses(ol,this.scope.AtrulePrelude);break;default:break e}null!==n&&(t.push(n),n=null),t.push(e);}return t}var ll,cl={parse:function(){return this.createSingleNodeList(this.SelectorList())}},ul={parse:function(){return this.createSingleNodeList(this.Nth(!0))}},hl={parse:function(){return this.createSingleNodeList(this.Nth(!1))}},pl={parseContext:{default:"StyleSheet",stylesheet:"StyleSheet",atrule:"Atrule",atrulePrelude:function(e){return this.AtrulePrelude(e.atrule?String(e.atrule):null)},mediaQueryList:"MediaQueryList",mediaQuery:"MediaQuery",rule:"Rule",selectorList:"SelectorList",selector:"Selector",block:function(){return this.Block(!0)},declarationList:"DeclarationList",declaration:"Declaration",value:"Value"},scope:Us,atrule:{"font-face":{parse:{prelude:null,block:function(){return this.Block(!0)}}},import:Zs,media:{parse:{prelude:function(){return this.createSingleNodeList(this.MediaQueryList())},block:function(){return this.Block(!1)}}},page:{parse:{prelude:function(){return this.createSingleNodeList(this.SelectorList())},block:function(){return this.Block(!0)}}},supports:{parse:{prelude:function(){var e=sl.call(this);return null===this.getFirstListNode(e)&&this.error("Condition is expected"),e},block:function(){return this.Block(!1)}}}},pseudo:{dir:{parse:function(){return this.createSingleNodeList(this.Identifier())}},has:{parse:function(){return this.createSingleNodeList(this.SelectorList())}},lang:{parse:function(){return this.createSingleNodeList(this.Identifier())}},matches:cl,not:cl,"nth-child":ul,"nth-last-child":ul,"nth-last-of-type":hl,"nth-of-type":hl,slotted:{parse:function(){return this.createSingleNodeList(this.Selector())}}},node:hs},dl={node:hs},ml={version:"1.1.2"},gl=(ll=Object.freeze({__proto__:null,version:"1.1.2",default:ml}))&&ll.default||ll;var fl=Ir(function(){for(var e={},t=0;t<arguments.length;t++){var n=arguments[t];for(var r in n)e[r]=n[r];}return e}(ps,pl,dl)),bl=gl.version;return fl.version=bl,fl}));
	});

	var hasOwnProperty = Object.prototype.hasOwnProperty;

	function buildMap(list, caseInsensitive) {
	    var map = Object.create(null);

	    if (!Array.isArray(list)) {
	        return null;
	    }

	    for (var i = 0; i < list.length; i++) {
	        var name = list[i];

	        if (caseInsensitive) {
	            name = name.toLowerCase();
	        }

	        map[name] = true;
	    }

	    return map;
	}

	function buildList(data) {
	    if (!data) {
	        return null;
	    }

	    var tags = buildMap(data.tags, true);
	    var ids = buildMap(data.ids);
	    var classes = buildMap(data.classes);

	    if (tags === null &&
	        ids === null &&
	        classes === null) {
	        return null;
	    }

	    return {
	        tags: tags,
	        ids: ids,
	        classes: classes
	    };
	}

	function buildIndex(data) {
	    var scopes = false;

	    if (data.scopes && Array.isArray(data.scopes)) {
	        scopes = Object.create(null);

	        for (var i = 0; i < data.scopes.length; i++) {
	            var list = data.scopes[i];

	            if (!list || !Array.isArray(list)) {
	                throw new Error('Wrong usage format');
	            }

	            for (var j = 0; j < list.length; j++) {
	                var name = list[j];

	                if (hasOwnProperty.call(scopes, name)) {
	                    throw new Error('Class can\'t be used for several scopes: ' + name);
	                }

	                scopes[name] = i + 1;
	            }
	        }
	    }

	    return {
	        whitelist: buildList(data),
	        blacklist: buildList(data.blacklist),
	        scopes: scopes
	    };
	}

	var usage = {
	    buildIndex: buildIndex
	};

	var utils = {
	    hasNoChildren: function(node) {
	        return !node || !node.children || node.children.isEmpty();
	    },
	    isNodeChildrenList: function(node, list) {
	        return node !== null && node.children === list;
	    }
	};

	var resolveKeyword = csstree_min.keyword;
	var { hasNoChildren } = utils;

	var Atrule = function cleanAtrule(node, item, list) {
	    if (node.block) {
	        // otherwise removed at-rule don't prevent @import for removal
	        if (this.stylesheet !== null) {
	            this.stylesheet.firstAtrulesAllowed = false;
	        }

	        if (hasNoChildren(node.block)) {
	            list.remove(item);
	            return;
	        }
	    }

	    switch (node.name) {
	        case 'charset':
	            if (hasNoChildren(node.prelude)) {
	                list.remove(item);
	                return;
	            }

	            // if there is any rule before @charset -> remove it
	            if (item.prev) {
	                list.remove(item);
	                return;
	            }

	            break;

	        case 'import':
	            if (this.stylesheet === null || !this.stylesheet.firstAtrulesAllowed) {
	                list.remove(item);
	                return;
	            }

	            // if there are some rules that not an @import or @charset before @import
	            // remove it
	            list.prevUntil(item.prev, function(rule) {
	                if (rule.type === 'Atrule') {
	                    if (rule.name === 'import' || rule.name === 'charset') {
	                        return;
	                    }
	                }

	                this.root.firstAtrulesAllowed = false;
	                list.remove(item);
	                return true;
	            }, this);

	            break;

	        default:
	            var name = resolveKeyword(node.name).basename;
	            if (name === 'keyframes' ||
	                name === 'media' ||
	                name === 'supports') {

	                // drop at-rule with no prelude
	                if (hasNoChildren(node.prelude) || hasNoChildren(node.block)) {
	                    list.remove(item);
	                }
	            }
	    }
	};

	var Comment = function cleanComment(data, item, list) {
	    list.remove(item);
	};

	var property = csstree_min.property;

	var Declaration = function cleanDeclartion(node, item, list) {
	    if (node.value.children && node.value.children.isEmpty()) {
	        list.remove(item);
	        return;
	    }

	    if (property(node.property).custom) {
	        if (/\S/.test(node.value.value)) {
	            node.value.value = node.value.value.trim();
	        }
	    }
	};

	var { isNodeChildrenList } = utils;

	var Raw = function cleanRaw(node, item, list) {
	    // raw in stylesheet or block children
	    if (isNodeChildrenList(this.stylesheet, list) ||
	        isNodeChildrenList(this.block, list)) {
	        list.remove(item);
	    }
	};

	var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
	var walk = csstree_min.walk;
	var { hasNoChildren: hasNoChildren$1 } = utils;

	function cleanUnused(selectorList, usageData) {
	    selectorList.children.each(function(selector, item, list) {
	        var shouldRemove = false;

	        walk(selector, function(node) {
	            // ignore nodes in nested selectors
	            if (this.selector === null || this.selector === selectorList) {
	                switch (node.type) {
	                    case 'SelectorList':
	                        // TODO: remove toLowerCase when pseudo selectors will be normalized
	                        // ignore selectors inside :not()
	                        if (this.function === null || this.function.name.toLowerCase() !== 'not') {
	                            if (cleanUnused(node, usageData)) {
	                                shouldRemove = true;
	                            }
	                        }
	                        break;

	                    case 'ClassSelector':
	                        if (usageData.whitelist !== null &&
	                            usageData.whitelist.classes !== null &&
	                            !hasOwnProperty$1.call(usageData.whitelist.classes, node.name)) {
	                            shouldRemove = true;
	                        }
	                        if (usageData.blacklist !== null &&
	                            usageData.blacklist.classes !== null &&
	                            hasOwnProperty$1.call(usageData.blacklist.classes, node.name)) {
	                            shouldRemove = true;
	                        }
	                        break;

	                    case 'IdSelector':
	                        if (usageData.whitelist !== null &&
	                            usageData.whitelist.ids !== null &&
	                            !hasOwnProperty$1.call(usageData.whitelist.ids, node.name)) {
	                            shouldRemove = true;
	                        }
	                        if (usageData.blacklist !== null &&
	                            usageData.blacklist.ids !== null &&
	                            hasOwnProperty$1.call(usageData.blacklist.ids, node.name)) {
	                            shouldRemove = true;
	                        }
	                        break;

	                    case 'TypeSelector':
	                        // TODO: remove toLowerCase when type selectors will be normalized
	                        // ignore universal selectors
	                        if (node.name.charAt(node.name.length - 1) !== '*') {
	                            if (usageData.whitelist !== null &&
	                                usageData.whitelist.tags !== null &&
	                                !hasOwnProperty$1.call(usageData.whitelist.tags, node.name.toLowerCase())) {
	                                shouldRemove = true;
	                            }
	                            if (usageData.blacklist !== null &&
	                                usageData.blacklist.tags !== null &&
	                                hasOwnProperty$1.call(usageData.blacklist.tags, node.name.toLowerCase())) {
	                                shouldRemove = true;
	                            }
	                        }
	                        break;
	                }
	            }
	        });

	        if (shouldRemove) {
	            list.remove(item);
	        }
	    });

	    return selectorList.children.isEmpty();
	}

	var Rule = function cleanRule(node, item, list, options) {
	    if (hasNoChildren$1(node.prelude) || hasNoChildren$1(node.block)) {
	        list.remove(item);
	        return;
	    }

	    var usageData = options.usage;

	    if (usageData && (usageData.whitelist !== null || usageData.blacklist !== null)) {
	        cleanUnused(node.prelude, usageData);

	        if (hasNoChildren$1(node.prelude)) {
	            list.remove(item);
	            return;
	        }
	    }
	};

	// remove useless universal selector
	var TypeSelector = function cleanTypeSelector(node, item, list) {
	    var name = item.data.name;

	    // check it's a non-namespaced universal selector
	    if (name !== '*') {
	        return;
	    }

	    // remove when universal selector before other selectors
	    var nextType = item.next && item.next.data.type;
	    if (nextType === 'IdSelector' ||
	        nextType === 'ClassSelector' ||
	        nextType === 'AttributeSelector' ||
	        nextType === 'PseudoClassSelector' ||
	        nextType === 'PseudoElementSelector') {
	        list.remove(item);
	    }
	};

	var { isNodeChildrenList: isNodeChildrenList$1 } = utils;

	function isSafeOperator(node) {
	    return node.type === 'Operator' && node.value !== '+' && node.value !== '-';
	}

	var WhiteSpace = function cleanWhitespace(node, item, list) {
	    // remove when first or last item in sequence
	    if (item.next === null || item.prev === null) {
	        list.remove(item);
	        return;
	    }

	    // white space in stylesheet or block children
	    if (isNodeChildrenList$1(this.stylesheet, list) ||
	        isNodeChildrenList$1(this.block, list)) {
	        list.remove(item);
	        return;
	    }

	    if (item.next.data.type === 'WhiteSpace') {
	        list.remove(item);
	        return;
	    }

	    if (isSafeOperator(item.prev.data) || isSafeOperator(item.next.data)) {
	        list.remove(item);
	        return;
	    }
	};

	var walk$1 = csstree_min.walk;
	var handlers = {
	    Atrule: Atrule,
	    Comment: Comment,
	    Declaration: Declaration,
	    Raw: Raw,
	    Rule: Rule,
	    TypeSelector: TypeSelector,
	    WhiteSpace: WhiteSpace
	};

	var clean = function(ast, options) {
	    walk$1(ast, {
	        leave: function(node, item, list) {
	            if (handlers.hasOwnProperty(node.type)) {
	                handlers[node.type].call(this, node, item, list, options);
	            }
	        }
	    });
	};

	var keyframes = function(node) {
	    node.block.children.each(function(rule) {
	        rule.prelude.children.each(function(simpleselector) {
	            simpleselector.children.each(function(data, item) {
	                if (data.type === 'Percentage' && data.value === '100') {
	                    item.data = {
	                        type: 'TypeSelector',
	                        loc: data.loc,
	                        name: 'to'
	                    };
	                } else if (data.type === 'TypeSelector' && data.name === 'from') {
	                    item.data = {
	                        type: 'Percentage',
	                        loc: data.loc,
	                        value: '0'
	                    };
	                }
	            });
	        });
	    });
	};

	var resolveKeyword$1 = csstree_min.keyword;


	var Atrule$1 = function(node) {
	    // compress @keyframe selectors
	    if (resolveKeyword$1(node.name).basename === 'keyframes') {
	        keyframes(node);
	    }
	};

	// Can unquote attribute detection
	// Adopted implementation of Mathias Bynens
	// https://github.com/mathiasbynens/mothereff.in/blob/master/unquoted-attributes/eff.js
	var escapesRx = /\\([0-9A-Fa-f]{1,6})(\r\n|[ \t\n\f\r])?|\\./g;
	var blockUnquoteRx = /^(-?\d|--)|[\u0000-\u002c\u002e\u002f\u003A-\u0040\u005B-\u005E\u0060\u007B-\u009f]/;

	function canUnquote(value) {
	    if (value === '' || value === '-') {
	        return;
	    }

	    // Escapes are valid, so replace them with a valid non-empty string
	    value = value.replace(escapesRx, 'a');

	    return !blockUnquoteRx.test(value);
	}

	var AttributeSelector = function(node) {
	    var attrValue = node.value;

	    if (!attrValue || attrValue.type !== 'String') {
	        return;
	    }

	    var unquotedValue = attrValue.value.replace(/^(.)(.*)\1$/, '$2');
	    if (canUnquote(unquotedValue)) {
	        node.value = {
	            type: 'Identifier',
	            loc: attrValue.loc,
	            name: unquotedValue
	        };
	    }
	};

	var font = function compressFont(node) {
	    var list = node.children;

	    list.eachRight(function(node, item) {
	        if (node.type === 'Identifier') {
	            if (node.name === 'bold') {
	                item.data = {
	                    type: 'Number',
	                    loc: node.loc,
	                    value: '700'
	                };
	            } else if (node.name === 'normal') {
	                var prev = item.prev;

	                if (prev && prev.data.type === 'Operator' && prev.data.value === '/') {
	                    this.remove(prev);
	                }

	                this.remove(item);
	            } else if (node.name === 'medium') {
	                var next = item.next;

	                if (!next || next.data.type !== 'Operator') {
	                    this.remove(item);
	                }
	            }
	        }
	    });

	    // remove redundant spaces
	    list.each(function(node, item) {
	        if (node.type === 'WhiteSpace') {
	            if (!item.prev || !item.next || item.next.data.type === 'WhiteSpace') {
	                this.remove(item);
	            }
	        }
	    });

	    if (list.isEmpty()) {
	        list.insert(list.createItem({
	            type: 'Identifier',
	            name: 'normal'
	        }));
	    }
	};

	var fontWeight = function compressFontWeight(node) {
	    var value = node.children.head.data;

	    if (value.type === 'Identifier') {
	        switch (value.name) {
	            case 'normal':
	                node.children.head.data = {
	                    type: 'Number',
	                    loc: value.loc,
	                    value: '400'
	                };
	                break;
	            case 'bold':
	                node.children.head.data = {
	                    type: 'Number',
	                    loc: value.loc,
	                    value: '700'
	                };
	                break;
	        }
	    }
	};

	var List = csstree_min.List;

	var background = function compressBackground(node) {
	    function lastType() {
	        if (buffer.length) {
	            return buffer[buffer.length - 1].type;
	        }
	    }

	    function flush() {
	        if (lastType() === 'WhiteSpace') {
	            buffer.pop();
	        }

	        if (!buffer.length) {
	            buffer.unshift(
	                {
	                    type: 'Number',
	                    loc: null,
	                    value: '0'
	                },
	                {
	                    type: 'WhiteSpace',
	                    value: ' '
	                },
	                {
	                    type: 'Number',
	                    loc: null,
	                    value: '0'
	                }
	            );
	        }

	        newValue.push.apply(newValue, buffer);

	        buffer = [];
	    }

	    var newValue = [];
	    var buffer = [];

	    node.children.each(function(node) {
	        if (node.type === 'Operator' && node.value === ',') {
	            flush();
	            newValue.push(node);
	            return;
	        }

	        // remove defaults
	        if (node.type === 'Identifier') {
	            if (node.name === 'transparent' ||
	                node.name === 'none' ||
	                node.name === 'repeat' ||
	                node.name === 'scroll') {
	                return;
	            }
	        }

	        // don't add redundant spaces
	        if (node.type === 'WhiteSpace' && (!buffer.length || lastType() === 'WhiteSpace')) {
	            return;
	        }

	        buffer.push(node);
	    });

	    flush();
	    node.children = new List().fromArray(newValue);
	};

	function removeItemAndRedundantWhiteSpace(list, item) {
	    var prev = item.prev;
	    var next = item.next;

	    if (next !== null) {
	        if (next.data.type === 'WhiteSpace' && (prev === null || prev.data.type === 'WhiteSpace')) {
	            list.remove(next);
	        }
	    } else if (prev !== null && prev.data.type === 'WhiteSpace') {
	        list.remove(prev);
	    }

	    list.remove(item);
	}

	var border = function compressBorder(node) {
	    node.children.each(function(node, item, list) {
	        if (node.type === 'Identifier' && node.name.toLowerCase() === 'none') {
	            if (list.head === list.tail) {
	                // replace `none` for zero when `none` is a single term
	                item.data = {
	                    type: 'Number',
	                    loc: node.loc,
	                    value: '0'
	                };
	            } else {
	                removeItemAndRedundantWhiteSpace(list, item);
	            }
	        }
	    });
	};

	var resolveName = csstree_min.property;
	var handlers$1 = {
	    'font': font,
	    'font-weight': fontWeight,
	    'background': background,
	    'border': border,
	    'outline': border
	};

	var Value = function compressValue(node) {
	    if (!this.declaration) {
	        return;
	    }

	    var property = resolveName(this.declaration.property);

	    if (handlers$1.hasOwnProperty(property.basename)) {
	        handlers$1[property.basename](node);
	    }
	};

	var OMIT_PLUSSIGN = /^(?:\+|(-))?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
	var KEEP_PLUSSIGN = /^([\+\-])?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
	var unsafeToRemovePlusSignAfter = {
	    Dimension: true,
	    Hash: true,
	    Identifier: true,
	    Number: true,
	    Raw: true,
	    UnicodeRange: true
	};

	function packNumber(value, item) {
	    // omit plus sign only if no prev or prev is safe type
	    var regexp = item && item.prev !== null && unsafeToRemovePlusSignAfter.hasOwnProperty(item.prev.data.type)
	        ? KEEP_PLUSSIGN
	        : OMIT_PLUSSIGN;

	    // 100 -> '100'
	    // 00100 -> '100'
	    // +100 -> '100' (only when safe, e.g. omitting plus sign for 1px+1px leads to single dimension instead of two)
	    // -100 -> '-100'
	    // 0.123 -> '.123'
	    // 0.12300 -> '.123'
	    // 0.0 -> ''
	    // 0 -> ''
	    // -0 -> '-'
	    value = String(value).replace(regexp, '$1$2$3');

	    if (value === '' || value === '-') {
	        value = '0';
	    }

	    return value;
	}

	var _Number = function(node, item) {
	    node.value = packNumber(node.value, item);
	};
	var pack = packNumber;
	_Number.pack = pack;

	var packNumber$1 = _Number.pack;
	var MATH_FUNCTIONS = {
	    'calc': true,
	    'min': true,
	    'max': true,
	    'clamp': true
	};
	var LENGTH_UNIT = {
	    // absolute length units
	    'px': true,
	    'mm': true,
	    'cm': true,
	    'in': true,
	    'pt': true,
	    'pc': true,

	    // relative length units
	    'em': true,
	    'ex': true,
	    'ch': true,
	    'rem': true,

	    // viewport-percentage lengths
	    'vh': true,
	    'vw': true,
	    'vmin': true,
	    'vmax': true,
	    'vm': true
	};

	var Dimension = function compressDimension(node, item) {
	    var value = packNumber$1(node.value, item);

	    node.value = value;

	    if (value === '0' && this.declaration !== null && this.atrulePrelude === null) {
	        var unit = node.unit.toLowerCase();

	        // only length values can be compressed
	        if (!LENGTH_UNIT.hasOwnProperty(unit)) {
	            return;
	        }

	        // issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
	        // issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
	        if (this.declaration.property === '-ms-flex' ||
	            this.declaration.property === 'flex') {
	            return;
	        }

	        // issue #222: don't remove units inside calc
	        if (this.function && MATH_FUNCTIONS.hasOwnProperty(this.function.name)) {
	            return;
	        }

	        item.data = {
	            type: 'Number',
	            loc: node.loc,
	            value: value
	        };
	    }
	};

	var lexer = csstree_min.lexer;
	var packNumber$2 = _Number.pack;
	var blacklist = new Set([
	    // see https://github.com/jakubpawlowicz/clean-css/issues/957
	    'width',
	    'min-width',
	    'max-width',
	    'height',
	    'min-height',
	    'max-height',

	    // issue #410: Don’t remove units in flex-basis value for (-ms-)flex shorthand
	    // issue #362: shouldn't remove unit in -ms-flex since it breaks flex in IE10/11
	    // issue #200: shouldn't remove unit in flex since it breaks flex in IE10/11
	    'flex',
	    '-ms-flex'
	]);

	var Percentage = function compressPercentage(node, item) {
	    node.value = packNumber$2(node.value, item);

	    if (node.value === '0' && this.declaration && !blacklist.has(this.declaration.property)) {
	        // try to convert a number
	        item.data = {
	            type: 'Number',
	            loc: node.loc,
	            value: node.value
	        };

	        // that's ok only when new value matches on length
	        if (!lexer.matchDeclaration(this.declaration).isType(item.data, 'length')) {
	            // otherwise rollback changes
	            item.data = node;
	        }
	    }
	};

	var _String = function(node) {
	    var value = node.value;

	    // remove escaped newlines, i.e.
	    // .a { content: "foo\
	    // bar"}
	    // ->
	    // .a { content: "foobar" }
	    value = value.replace(/\\(\r\n|\r|\n|\f)/g, '');

	    node.value = value;
	};

	var UNICODE = '\\\\[0-9a-f]{1,6}(\\r\\n|[ \\n\\r\\t\\f])?';
	var ESCAPE = '(' + UNICODE + '|\\\\[^\\n\\r\\f0-9a-fA-F])';
	var NONPRINTABLE = '\u0000\u0008\u000b\u000e-\u001f\u007f';
	var SAFE_URL = new RegExp('^(' + ESCAPE + '|[^\"\'\\(\\)\\\\\\s' + NONPRINTABLE + '])*$', 'i');

	var Url = function(node) {
	    var value = node.value;

	    if (value.type !== 'String') {
	        return;
	    }

	    var quote = value.value[0];
	    var url = value.value.substr(1, value.value.length - 2);

	    // convert `\\` to `/`
	    url = url.replace(/\\\\/g, '/');

	    // remove quotes when safe
	    // https://www.w3.org/TR/css-syntax-3/#url-unquoted-diagram
	    if (SAFE_URL.test(url)) {
	        node.value = {
	            type: 'Raw',
	            loc: node.value.loc,
	            value: url
	        };
	    } else {
	        // use double quotes if string has no double quotes
	        // otherwise use original quotes
	        // TODO: make better quote type selection
	        node.value.value = url.indexOf('"') === -1 ? '"' + url + '"' : quote + url + quote;
	    }
	};

	var lexer$1 = csstree_min.lexer;
	var packNumber$3 = _Number.pack;

	// http://www.w3.org/TR/css3-color/#svg-color
	var NAME_TO_HEX = {
	    'aliceblue': 'f0f8ff',
	    'antiquewhite': 'faebd7',
	    'aqua': '0ff',
	    'aquamarine': '7fffd4',
	    'azure': 'f0ffff',
	    'beige': 'f5f5dc',
	    'bisque': 'ffe4c4',
	    'black': '000',
	    'blanchedalmond': 'ffebcd',
	    'blue': '00f',
	    'blueviolet': '8a2be2',
	    'brown': 'a52a2a',
	    'burlywood': 'deb887',
	    'cadetblue': '5f9ea0',
	    'chartreuse': '7fff00',
	    'chocolate': 'd2691e',
	    'coral': 'ff7f50',
	    'cornflowerblue': '6495ed',
	    'cornsilk': 'fff8dc',
	    'crimson': 'dc143c',
	    'cyan': '0ff',
	    'darkblue': '00008b',
	    'darkcyan': '008b8b',
	    'darkgoldenrod': 'b8860b',
	    'darkgray': 'a9a9a9',
	    'darkgrey': 'a9a9a9',
	    'darkgreen': '006400',
	    'darkkhaki': 'bdb76b',
	    'darkmagenta': '8b008b',
	    'darkolivegreen': '556b2f',
	    'darkorange': 'ff8c00',
	    'darkorchid': '9932cc',
	    'darkred': '8b0000',
	    'darksalmon': 'e9967a',
	    'darkseagreen': '8fbc8f',
	    'darkslateblue': '483d8b',
	    'darkslategray': '2f4f4f',
	    'darkslategrey': '2f4f4f',
	    'darkturquoise': '00ced1',
	    'darkviolet': '9400d3',
	    'deeppink': 'ff1493',
	    'deepskyblue': '00bfff',
	    'dimgray': '696969',
	    'dimgrey': '696969',
	    'dodgerblue': '1e90ff',
	    'firebrick': 'b22222',
	    'floralwhite': 'fffaf0',
	    'forestgreen': '228b22',
	    'fuchsia': 'f0f',
	    'gainsboro': 'dcdcdc',
	    'ghostwhite': 'f8f8ff',
	    'gold': 'ffd700',
	    'goldenrod': 'daa520',
	    'gray': '808080',
	    'grey': '808080',
	    'green': '008000',
	    'greenyellow': 'adff2f',
	    'honeydew': 'f0fff0',
	    'hotpink': 'ff69b4',
	    'indianred': 'cd5c5c',
	    'indigo': '4b0082',
	    'ivory': 'fffff0',
	    'khaki': 'f0e68c',
	    'lavender': 'e6e6fa',
	    'lavenderblush': 'fff0f5',
	    'lawngreen': '7cfc00',
	    'lemonchiffon': 'fffacd',
	    'lightblue': 'add8e6',
	    'lightcoral': 'f08080',
	    'lightcyan': 'e0ffff',
	    'lightgoldenrodyellow': 'fafad2',
	    'lightgray': 'd3d3d3',
	    'lightgrey': 'd3d3d3',
	    'lightgreen': '90ee90',
	    'lightpink': 'ffb6c1',
	    'lightsalmon': 'ffa07a',
	    'lightseagreen': '20b2aa',
	    'lightskyblue': '87cefa',
	    'lightslategray': '789',
	    'lightslategrey': '789',
	    'lightsteelblue': 'b0c4de',
	    'lightyellow': 'ffffe0',
	    'lime': '0f0',
	    'limegreen': '32cd32',
	    'linen': 'faf0e6',
	    'magenta': 'f0f',
	    'maroon': '800000',
	    'mediumaquamarine': '66cdaa',
	    'mediumblue': '0000cd',
	    'mediumorchid': 'ba55d3',
	    'mediumpurple': '9370db',
	    'mediumseagreen': '3cb371',
	    'mediumslateblue': '7b68ee',
	    'mediumspringgreen': '00fa9a',
	    'mediumturquoise': '48d1cc',
	    'mediumvioletred': 'c71585',
	    'midnightblue': '191970',
	    'mintcream': 'f5fffa',
	    'mistyrose': 'ffe4e1',
	    'moccasin': 'ffe4b5',
	    'navajowhite': 'ffdead',
	    'navy': '000080',
	    'oldlace': 'fdf5e6',
	    'olive': '808000',
	    'olivedrab': '6b8e23',
	    'orange': 'ffa500',
	    'orangered': 'ff4500',
	    'orchid': 'da70d6',
	    'palegoldenrod': 'eee8aa',
	    'palegreen': '98fb98',
	    'paleturquoise': 'afeeee',
	    'palevioletred': 'db7093',
	    'papayawhip': 'ffefd5',
	    'peachpuff': 'ffdab9',
	    'peru': 'cd853f',
	    'pink': 'ffc0cb',
	    'plum': 'dda0dd',
	    'powderblue': 'b0e0e6',
	    'purple': '800080',
	    'rebeccapurple': '639',
	    'red': 'f00',
	    'rosybrown': 'bc8f8f',
	    'royalblue': '4169e1',
	    'saddlebrown': '8b4513',
	    'salmon': 'fa8072',
	    'sandybrown': 'f4a460',
	    'seagreen': '2e8b57',
	    'seashell': 'fff5ee',
	    'sienna': 'a0522d',
	    'silver': 'c0c0c0',
	    'skyblue': '87ceeb',
	    'slateblue': '6a5acd',
	    'slategray': '708090',
	    'slategrey': '708090',
	    'snow': 'fffafa',
	    'springgreen': '00ff7f',
	    'steelblue': '4682b4',
	    'tan': 'd2b48c',
	    'teal': '008080',
	    'thistle': 'd8bfd8',
	    'tomato': 'ff6347',
	    'turquoise': '40e0d0',
	    'violet': 'ee82ee',
	    'wheat': 'f5deb3',
	    'white': 'fff',
	    'whitesmoke': 'f5f5f5',
	    'yellow': 'ff0',
	    'yellowgreen': '9acd32'
	};

	var HEX_TO_NAME = {
	    '800000': 'maroon',
	    '800080': 'purple',
	    '808000': 'olive',
	    '808080': 'gray',
	    '00ffff': 'cyan',
	    'f0ffff': 'azure',
	    'f5f5dc': 'beige',
	    'ffe4c4': 'bisque',
	    '000000': 'black',
	    '0000ff': 'blue',
	    'a52a2a': 'brown',
	    'ff7f50': 'coral',
	    'ffd700': 'gold',
	    '008000': 'green',
	    '4b0082': 'indigo',
	    'fffff0': 'ivory',
	    'f0e68c': 'khaki',
	    '00ff00': 'lime',
	    'faf0e6': 'linen',
	    '000080': 'navy',
	    'ffa500': 'orange',
	    'da70d6': 'orchid',
	    'cd853f': 'peru',
	    'ffc0cb': 'pink',
	    'dda0dd': 'plum',
	    'f00': 'red',
	    'ff0000': 'red',
	    'fa8072': 'salmon',
	    'a0522d': 'sienna',
	    'c0c0c0': 'silver',
	    'fffafa': 'snow',
	    'd2b48c': 'tan',
	    '008080': 'teal',
	    'ff6347': 'tomato',
	    'ee82ee': 'violet',
	    'f5deb3': 'wheat',
	    'ffffff': 'white',
	    'ffff00': 'yellow'
	};

	function hueToRgb(p, q, t) {
	    if (t < 0) {
	        t += 1;
	    }
	    if (t > 1) {
	        t -= 1;
	    }
	    if (t < 1 / 6) {
	        return p + (q - p) * 6 * t;
	    }
	    if (t < 1 / 2) {
	        return q;
	    }
	    if (t < 2 / 3) {
	        return p + (q - p) * (2 / 3 - t) * 6;
	    }
	    return p;
	}

	function hslToRgb(h, s, l, a) {
	    var r;
	    var g;
	    var b;

	    if (s === 0) {
	        r = g = b = l; // achromatic
	    } else {
	        var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
	        var p = 2 * l - q;

	        r = hueToRgb(p, q, h + 1 / 3);
	        g = hueToRgb(p, q, h);
	        b = hueToRgb(p, q, h - 1 / 3);
	    }

	    return [
	        Math.round(r * 255),
	        Math.round(g * 255),
	        Math.round(b * 255),
	        a
	    ];
	}

	function toHex(value) {
	    value = value.toString(16);
	    return value.length === 1 ? '0' + value : value;
	}

	function parseFunctionArgs(functionArgs, count, rgb) {
	    var cursor = functionArgs.head;
	    var args = [];
	    var wasValue = false;

	    while (cursor !== null) {
	        var node = cursor.data;
	        var type = node.type;

	        switch (type) {
	            case 'Number':
	            case 'Percentage':
	                if (wasValue) {
	                    return;
	                }

	                wasValue = true;
	                args.push({
	                    type: type,
	                    value: Number(node.value)
	                });
	                break;

	            case 'Operator':
	                if (node.value === ',') {
	                    if (!wasValue) {
	                        return;
	                    }
	                    wasValue = false;
	                } else if (wasValue || node.value !== '+') {
	                    return;
	                }
	                break;

	            default:
	                // something we couldn't understand
	                return;
	        }

	        cursor = cursor.next;
	    }

	    if (args.length !== count) {
	        // invalid arguments count
	        // TODO: remove those tokens
	        return;
	    }

	    if (args.length === 4) {
	        if (args[3].type !== 'Number') {
	            // 4th argument should be a number
	            // TODO: remove those tokens
	            return;
	        }

	        args[3].type = 'Alpha';
	    }

	    if (rgb) {
	        if (args[0].type !== args[1].type || args[0].type !== args[2].type) {
	            // invalid color, numbers and percentage shouldn't be mixed
	            // TODO: remove those tokens
	            return;
	        }
	    } else {
	        if (args[0].type !== 'Number' ||
	            args[1].type !== 'Percentage' ||
	            args[2].type !== 'Percentage') {
	            // invalid color, for hsl values should be: number, percentage, percentage
	            // TODO: remove those tokens
	            return;
	        }

	        args[0].type = 'Angle';
	    }

	    return args.map(function(arg) {
	        var value = Math.max(0, arg.value);

	        switch (arg.type) {
	            case 'Number':
	                // fit value to [0..255] range
	                value = Math.min(value, 255);
	                break;

	            case 'Percentage':
	                // convert 0..100% to value in [0..255] range
	                value = Math.min(value, 100) / 100;

	                if (!rgb) {
	                    return value;
	                }

	                value = 255 * value;
	                break;

	            case 'Angle':
	                // fit value to (-360..360) range
	                return (((value % 360) + 360) % 360) / 360;

	            case 'Alpha':
	                // fit value to [0..1] range
	                return Math.min(value, 1);
	        }

	        return Math.round(value);
	    });
	}

	function compressFunction(node, item, list) {
	    var functionName = node.name;
	    var args;

	    if (functionName === 'rgba' || functionName === 'hsla') {
	        args = parseFunctionArgs(node.children, 4, functionName === 'rgba');

	        if (!args) {
	            // something went wrong
	            return;
	        }

	        if (functionName === 'hsla') {
	            args = hslToRgb.apply(null, args);
	            node.name = 'rgba';
	        }

	        if (args[3] === 0) {
	            // try to replace `rgba(x, x, x, 0)` to `transparent`
	            // always replace `rgba(0, 0, 0, 0)` to `transparent`
	            // otherwise avoid replacement in gradients since it may break color transition
	            // http://stackoverflow.com/questions/11829410/css3-gradient-rendering-issues-from-transparent-to-white
	            var scopeFunctionName = this.function && this.function.name;
	            if ((args[0] === 0 && args[1] === 0 && args[2] === 0) ||
	                !/^(?:to|from|color-stop)$|gradient$/i.test(scopeFunctionName)) {

	                item.data = {
	                    type: 'Identifier',
	                    loc: node.loc,
	                    name: 'transparent'
	                };

	                return;
	            }
	        }

	        if (args[3] !== 1) {
	            // replace argument values for normalized/interpolated
	            node.children.each(function(node, item, list) {
	                if (node.type === 'Operator') {
	                    if (node.value !== ',') {
	                        list.remove(item);
	                    }
	                    return;
	                }

	                item.data = {
	                    type: 'Number',
	                    loc: node.loc,
	                    value: packNumber$3(args.shift(), null)
	                };
	            });

	            return;
	        }

	        // otherwise convert to rgb, i.e. rgba(255, 0, 0, 1) -> rgb(255, 0, 0)
	        functionName = 'rgb';
	    }

	    if (functionName === 'hsl') {
	        args = args || parseFunctionArgs(node.children, 3, false);

	        if (!args) {
	            // something went wrong
	            return;
	        }

	        // convert to rgb
	        args = hslToRgb.apply(null, args);
	        functionName = 'rgb';
	    }

	    if (functionName === 'rgb') {
	        args = args || parseFunctionArgs(node.children, 3, true);

	        if (!args) {
	            // something went wrong
	            return;
	        }

	        // check if color is not at the end and not followed by space
	        var next = item.next;
	        if (next && next.data.type !== 'WhiteSpace') {
	            list.insert(list.createItem({
	                type: 'WhiteSpace',
	                value: ' '
	            }), next);
	        }

	        item.data = {
	            type: 'Hash',
	            loc: node.loc,
	            value: toHex(args[0]) + toHex(args[1]) + toHex(args[2])
	        };

	        compressHex(item.data, item);
	    }
	}

	function compressIdent(node, item) {
	    if (this.declaration === null) {
	        return;
	    }

	    var color = node.name.toLowerCase();

	    if (NAME_TO_HEX.hasOwnProperty(color) &&
	        lexer$1.matchDeclaration(this.declaration).isType(node, 'color')) {
	        var hex = NAME_TO_HEX[color];

	        if (hex.length + 1 <= color.length) {
	            // replace for shorter hex value
	            item.data = {
	                type: 'Hash',
	                loc: node.loc,
	                value: hex
	            };
	        } else {
	            // special case for consistent colors
	            if (color === 'grey') {
	                color = 'gray';
	            }

	            // just replace value for lower cased name
	            node.name = color;
	        }
	    }
	}

	function compressHex(node, item) {
	    var color = node.value.toLowerCase();

	    // #112233 -> #123
	    if (color.length === 6 &&
	        color[0] === color[1] &&
	        color[2] === color[3] &&
	        color[4] === color[5]) {
	        color = color[0] + color[2] + color[4];
	    }

	    if (HEX_TO_NAME[color]) {
	        item.data = {
	            type: 'Identifier',
	            loc: node.loc,
	            name: HEX_TO_NAME[color]
	        };
	    } else {
	        node.value = color;
	    }
	}

	var color = {
	    compressFunction: compressFunction,
	    compressIdent: compressIdent,
	    compressHex: compressHex
	};

	var walk$2 = csstree_min.walk;
	var handlers$2 = {
	    Atrule: Atrule$1,
	    AttributeSelector: AttributeSelector,
	    Value: Value,
	    Dimension: Dimension,
	    Percentage: Percentage,
	    Number: _Number,
	    String: _String,
	    Url: Url,
	    Hash: color.compressHex,
	    Identifier: color.compressIdent,
	    Function: color.compressFunction
	};

	var replace = function(ast) {
	    walk$2(ast, {
	        leave: function(node, item, list) {
	            if (handlers$2.hasOwnProperty(node.type)) {
	                handlers$2[node.type].call(this, node, item, list);
	            }
	        }
	    });
	};

	var generate = csstree_min.generate;

	function Index() {
	    this.seed = 0;
	    this.map = Object.create(null);
	}

	Index.prototype.resolve = function(str) {
	    var index = this.map[str];

	    if (!index) {
	        index = ++this.seed;
	        this.map[str] = index;
	    }

	    return index;
	};

	var createDeclarationIndexer = function createDeclarationIndexer() {
	    var ids = new Index();

	    return function markDeclaration(node) {
	        var id = generate(node);

	        node.id = ids.resolve(id);
	        node.length = id.length;
	        node.fingerprint = null;

	        return node;
	    };
	};

	var specificity = function specificity(simpleSelector) {
	    var A = 0;
	    var B = 0;
	    var C = 0;

	    simpleSelector.children.each(function walk(node) {
	        switch (node.type) {
	            case 'SelectorList':
	            case 'Selector':
	                node.children.each(walk);
	                break;

	            case 'IdSelector':
	                A++;
	                break;

	            case 'ClassSelector':
	            case 'AttributeSelector':
	                B++;
	                break;

	            case 'PseudoClassSelector':
	                switch (node.name.toLowerCase()) {
	                    case 'not':
	                        node.children.each(walk);
	                        break;

	                    case 'before':
	                    case 'after':
	                    case 'first-line':
	                    case 'first-letter':
	                        C++;
	                        break;

	                    // TODO: support for :nth-*(.. of <SelectorList>), :matches(), :has()
	                    default:
	                        B++;
	                }
	                break;

	            case 'PseudoElementSelector':
	                C++;
	                break;

	            case 'TypeSelector':
	                // ignore universal selector
	                if (node.name.charAt(node.name.length - 1) !== '*') {
	                    C++;
	                }
	                break;

	        }
	    });

	    return [A, B, C];
	};

	var generate$1 = csstree_min.generate;


	var nonFreezePseudoElements = {
	    'first-letter': true,
	    'first-line': true,
	    'after': true,
	    'before': true
	};
	var nonFreezePseudoClasses = {
	    'link': true,
	    'visited': true,
	    'hover': true,
	    'active': true,
	    'first-letter': true,
	    'first-line': true,
	    'after': true,
	    'before': true
	};

	var processSelector = function freeze(node, usageData) {
	    var pseudos = Object.create(null);
	    var hasPseudo = false;

	    node.prelude.children.each(function(simpleSelector) {
	        var tagName = '*';
	        var scope = 0;

	        simpleSelector.children.each(function(node) {
	            switch (node.type) {
	                case 'ClassSelector':
	                    if (usageData && usageData.scopes) {
	                        var classScope = usageData.scopes[node.name] || 0;

	                        if (scope !== 0 && classScope !== scope) {
	                            throw new Error('Selector can\'t has classes from different scopes: ' + generate$1(simpleSelector));
	                        }

	                        scope = classScope;
	                    }
	                    break;

	                case 'PseudoClassSelector':
	                    var name = node.name.toLowerCase();

	                    if (!nonFreezePseudoClasses.hasOwnProperty(name)) {
	                        pseudos[':' + name] = true;
	                        hasPseudo = true;
	                    }
	                    break;

	                case 'PseudoElementSelector':
	                    var name = node.name.toLowerCase();

	                    if (!nonFreezePseudoElements.hasOwnProperty(name)) {
	                        pseudos['::' + name] = true;
	                        hasPseudo = true;
	                    }
	                    break;

	                case 'TypeSelector':
	                    tagName = node.name.toLowerCase();
	                    break;

	                case 'AttributeSelector':
	                    if (node.flags) {
	                        pseudos['[' + node.flags.toLowerCase() + ']'] = true;
	                        hasPseudo = true;
	                    }
	                    break;

	                case 'WhiteSpace':
	                case 'Combinator':
	                    tagName = '*';
	                    break;
	            }
	        });

	        simpleSelector.compareMarker = specificity(simpleSelector).toString();
	        simpleSelector.id = null; // pre-init property to avoid multiple hidden class
	        simpleSelector.id = generate$1(simpleSelector);

	        if (scope) {
	            simpleSelector.compareMarker += ':' + scope;
	        }

	        if (tagName !== '*') {
	            simpleSelector.compareMarker += ',' + tagName;
	        }
	    });

	    // add property to all rule nodes to avoid multiple hidden class
	    node.pseudoSignature = hasPseudo && Object.keys(pseudos).sort().join(',');
	};

	var resolveKeyword$2 = csstree_min.keyword;
	var walk$3 = csstree_min.walk;
	var generate$2 = csstree_min.generate;



	var prepare = function prepare(ast, options) {
	    var markDeclaration = createDeclarationIndexer();

	    walk$3(ast, {
	        visit: 'Rule',
	        enter: function processRule(node) {
	            node.block.children.each(markDeclaration);
	            processSelector(node, options.usage);
	        }
	    });

	    walk$3(ast, {
	        visit: 'Atrule',
	        enter: function(node) {
	            if (node.prelude) {
	                node.prelude.id = null; // pre-init property to avoid multiple hidden class for generate
	                node.prelude.id = generate$2(node.prelude);
	            }

	            // compare keyframe selectors by its values
	            // NOTE: still no clarification about problems with keyframes selector grouping (issue #197)
	            if (resolveKeyword$2(node.name).basename === 'keyframes') {
	                node.block.avoidRulesMerge = true;  /* probably we don't need to prevent those merges for @keyframes
	                                                       TODO: need to be checked */
	                node.block.children.each(function(rule) {
	                    rule.prelude.children.each(function(simpleselector) {
	                        simpleselector.compareMarker = simpleselector.id;
	                    });
	                });
	            }
	        }
	    });

	    return {
	        declaration: markDeclaration
	    };
	};

	var List$1 = csstree_min.List;
	var resolveKeyword$3 = csstree_min.keyword;
	var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
	var walk$4 = csstree_min.walk;

	function addRuleToMap(map, item, list, single) {
	    var node = item.data;
	    var name = resolveKeyword$3(node.name).basename;
	    var id = node.name.toLowerCase() + '/' + (node.prelude ? node.prelude.id : null);

	    if (!hasOwnProperty$2.call(map, name)) {
	        map[name] = Object.create(null);
	    }

	    if (single) {
	        delete map[name][id];
	    }

	    if (!hasOwnProperty$2.call(map[name], id)) {
	        map[name][id] = new List$1();
	    }

	    map[name][id].append(list.remove(item));
	}

	function relocateAtrules(ast, options) {
	    var collected = Object.create(null);
	    var topInjectPoint = null;

	    ast.children.each(function(node, item, list) {
	        if (node.type === 'Atrule') {
	            var name = resolveKeyword$3(node.name).basename;

	            switch (name) {
	                case 'keyframes':
	                    addRuleToMap(collected, item, list, true);
	                    return;

	                case 'media':
	                    if (options.forceMediaMerge) {
	                        addRuleToMap(collected, item, list, false);
	                        return;
	                    }
	                    break;
	            }

	            if (topInjectPoint === null &&
	                name !== 'charset' &&
	                name !== 'import') {
	                topInjectPoint = item;
	            }
	        } else {
	            if (topInjectPoint === null) {
	                topInjectPoint = item;
	            }
	        }
	    });

	    for (var atrule in collected) {
	        for (var id in collected[atrule]) {
	            ast.children.insertList(
	                collected[atrule][id],
	                atrule === 'media' ? null : topInjectPoint
	            );
	        }
	    }
	}
	function isMediaRule(node) {
	    return node.type === 'Atrule' && node.name === 'media';
	}

	function processAtrule(node, item, list) {
	    if (!isMediaRule(node)) {
	        return;
	    }

	    var prev = item.prev && item.prev.data;

	    if (!prev || !isMediaRule(prev)) {
	        return;
	    }

	    // merge @media with same query
	    if (node.prelude &&
	        prev.prelude &&
	        node.prelude.id === prev.prelude.id) {
	        prev.block.children.appendList(node.block.children);
	        list.remove(item);

	        // TODO: use it when we can refer to several points in source
	        // prev.loc = {
	        //     primary: prev.loc,
	        //     merged: node.loc
	        // };
	    }
	}

	var _1MergeAtrule = function rejoinAtrule(ast, options) {
	    relocateAtrules(ast, options);

	    walk$4(ast, {
	        visit: 'Atrule',
	        reverse: true,
	        enter: processAtrule
	    });
	};

	var hasOwnProperty$3 = Object.prototype.hasOwnProperty;

	function isEqualSelectors(a, b) {
	    var cursor1 = a.head;
	    var cursor2 = b.head;

	    while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
	        cursor1 = cursor1.next;
	        cursor2 = cursor2.next;
	    }

	    return cursor1 === null && cursor2 === null;
	}

	function isEqualDeclarations(a, b) {
	    var cursor1 = a.head;
	    var cursor2 = b.head;

	    while (cursor1 !== null && cursor2 !== null && cursor1.data.id === cursor2.data.id) {
	        cursor1 = cursor1.next;
	        cursor2 = cursor2.next;
	    }

	    return cursor1 === null && cursor2 === null;
	}

	function compareDeclarations(declarations1, declarations2) {
	    var result = {
	        eq: [],
	        ne1: [],
	        ne2: [],
	        ne2overrided: []
	    };

	    var fingerprints = Object.create(null);
	    var declarations2hash = Object.create(null);

	    for (var cursor = declarations2.head; cursor; cursor = cursor.next)  {
	        declarations2hash[cursor.data.id] = true;
	    }

	    for (var cursor = declarations1.head; cursor; cursor = cursor.next)  {
	        var data = cursor.data;

	        if (data.fingerprint) {
	            fingerprints[data.fingerprint] = data.important;
	        }

	        if (declarations2hash[data.id]) {
	            declarations2hash[data.id] = false;
	            result.eq.push(data);
	        } else {
	            result.ne1.push(data);
	        }
	    }

	    for (var cursor = declarations2.head; cursor; cursor = cursor.next)  {
	        var data = cursor.data;

	        if (declarations2hash[data.id]) {
	            // when declarations1 has an overriding declaration, this is not a difference
	            // unless no !important is used on prev and !important is used on the following
	            if (!hasOwnProperty$3.call(fingerprints, data.fingerprint) ||
	                (!fingerprints[data.fingerprint] && data.important)) {
	                result.ne2.push(data);
	            }

	            result.ne2overrided.push(data);
	        }
	    }

	    return result;
	}

	function addSelectors(dest, source) {
	    source.each(function(sourceData) {
	        var newStr = sourceData.id;
	        var cursor = dest.head;

	        while (cursor) {
	            var nextStr = cursor.data.id;

	            if (nextStr === newStr) {
	                return;
	            }

	            if (nextStr > newStr) {
	                break;
	            }

	            cursor = cursor.next;
	        }

	        dest.insert(dest.createItem(sourceData), cursor);
	    });

	    return dest;
	}

	// check if simpleselectors has no equal specificity and element selector
	function hasSimilarSelectors(selectors1, selectors2) {
	    var cursor1 = selectors1.head;

	    while (cursor1 !== null) {
	        var cursor2 = selectors2.head;

	        while (cursor2 !== null) {
	            if (cursor1.data.compareMarker === cursor2.data.compareMarker) {
	                return true;
	            }

	            cursor2 = cursor2.next;
	        }

	        cursor1 = cursor1.next;
	    }

	    return false;
	}

	// test node can't to be skipped
	function unsafeToSkipNode(node) {
	    switch (node.type) {
	        case 'Rule':
	            // unsafe skip ruleset with selector similarities
	            return hasSimilarSelectors(node.prelude.children, this);

	        case 'Atrule':
	            // can skip at-rules with blocks
	            if (node.block) {
	                // unsafe skip at-rule if block contains something unsafe to skip
	                return node.block.children.some(unsafeToSkipNode, this);
	            }
	            break;

	        case 'Declaration':
	            return false;
	    }

	    // unsafe by default
	    return true;
	}

	var utils$1 = {
	    isEqualSelectors: isEqualSelectors,
	    isEqualDeclarations: isEqualDeclarations,
	    compareDeclarations: compareDeclarations,
	    addSelectors: addSelectors,
	    hasSimilarSelectors: hasSimilarSelectors,
	    unsafeToSkipNode: unsafeToSkipNode
	};

	var walk$5 = csstree_min.walk;


	function processRule(node, item, list) {
	    var selectors = node.prelude.children;
	    var declarations = node.block.children;

	    list.prevUntil(item.prev, function(prev) {
	        // skip non-ruleset node if safe
	        if (prev.type !== 'Rule') {
	            return utils$1.unsafeToSkipNode.call(selectors, prev);
	        }

	        var prevSelectors = prev.prelude.children;
	        var prevDeclarations = prev.block.children;

	        // try to join rulesets with equal pseudo signature
	        if (node.pseudoSignature === prev.pseudoSignature) {
	            // try to join by selectors
	            if (utils$1.isEqualSelectors(prevSelectors, selectors)) {
	                prevDeclarations.appendList(declarations);
	                list.remove(item);
	                return true;
	            }

	            // try to join by declarations
	            if (utils$1.isEqualDeclarations(declarations, prevDeclarations)) {
	                utils$1.addSelectors(prevSelectors, selectors);
	                list.remove(item);
	                return true;
	            }
	        }

	        // go to prev ruleset if has no selector similarities
	        return utils$1.hasSimilarSelectors(selectors, prevSelectors);
	    });
	}

	// NOTE: direction should be left to right, since rulesets merge to left
	// ruleset. When direction right to left unmerged rulesets may prevent lookup
	// TODO: remove initial merge
	var _2InitialMergeRuleset = function initialMergeRule(ast) {
	    walk$5(ast, {
	        visit: 'Rule',
	        enter: processRule
	    });
	};

	var List$2 = csstree_min.List;
	var walk$6 = csstree_min.walk;

	function processRule$1(node, item, list) {
	    var selectors = node.prelude.children;

	    // generate new rule sets:
	    // .a, .b { color: red; }
	    // ->
	    // .a { color: red; }
	    // .b { color: red; }

	    // while there are more than 1 simple selector split for rulesets
	    while (selectors.head !== selectors.tail) {
	        var newSelectors = new List$2();
	        newSelectors.insert(selectors.remove(selectors.head));

	        list.insert(list.createItem({
	            type: 'Rule',
	            loc: node.loc,
	            prelude: {
	                type: 'SelectorList',
	                loc: node.prelude.loc,
	                children: newSelectors
	            },
	            block: {
	                type: 'Block',
	                loc: node.block.loc,
	                children: node.block.children.copy()
	            },
	            pseudoSignature: node.pseudoSignature
	        }), item);
	    }
	}

	var _3DisjoinRuleset = function disjoinRule(ast) {
	    walk$6(ast, {
	        visit: 'Rule',
	        reverse: true,
	        enter: processRule$1
	    });
	};

	var List$3 = csstree_min.List;
	var generate$3 = csstree_min.generate;
	var walk$7 = csstree_min.walk;

	var REPLACE = 1;
	var REMOVE = 2;
	var TOP = 0;
	var RIGHT = 1;
	var BOTTOM = 2;
	var LEFT = 3;
	var SIDES = ['top', 'right', 'bottom', 'left'];
	var SIDE = {
	    'margin-top': 'top',
	    'margin-right': 'right',
	    'margin-bottom': 'bottom',
	    'margin-left': 'left',

	    'padding-top': 'top',
	    'padding-right': 'right',
	    'padding-bottom': 'bottom',
	    'padding-left': 'left',

	    'border-top-color': 'top',
	    'border-right-color': 'right',
	    'border-bottom-color': 'bottom',
	    'border-left-color': 'left',
	    'border-top-width': 'top',
	    'border-right-width': 'right',
	    'border-bottom-width': 'bottom',
	    'border-left-width': 'left',
	    'border-top-style': 'top',
	    'border-right-style': 'right',
	    'border-bottom-style': 'bottom',
	    'border-left-style': 'left'
	};
	var MAIN_PROPERTY = {
	    'margin': 'margin',
	    'margin-top': 'margin',
	    'margin-right': 'margin',
	    'margin-bottom': 'margin',
	    'margin-left': 'margin',

	    'padding': 'padding',
	    'padding-top': 'padding',
	    'padding-right': 'padding',
	    'padding-bottom': 'padding',
	    'padding-left': 'padding',

	    'border-color': 'border-color',
	    'border-top-color': 'border-color',
	    'border-right-color': 'border-color',
	    'border-bottom-color': 'border-color',
	    'border-left-color': 'border-color',
	    'border-width': 'border-width',
	    'border-top-width': 'border-width',
	    'border-right-width': 'border-width',
	    'border-bottom-width': 'border-width',
	    'border-left-width': 'border-width',
	    'border-style': 'border-style',
	    'border-top-style': 'border-style',
	    'border-right-style': 'border-style',
	    'border-bottom-style': 'border-style',
	    'border-left-style': 'border-style'
	};

	function TRBL(name) {
	    this.name = name;
	    this.loc = null;
	    this.iehack = undefined;
	    this.sides = {
	        'top': null,
	        'right': null,
	        'bottom': null,
	        'left': null
	    };
	}

	TRBL.prototype.getValueSequence = function(declaration, count) {
	    var values = [];
	    var iehack = '';
	    var hasBadValues = declaration.value.type !== 'Value' || declaration.value.children.some(function(child) {
	        var special = false;

	        switch (child.type) {
	            case 'Identifier':
	                switch (child.name) {
	                    case '\\0':
	                    case '\\9':
	                        iehack = child.name;
	                        return;

	                    case 'inherit':
	                    case 'initial':
	                    case 'unset':
	                    case 'revert':
	                        special = child.name;
	                        break;
	                }
	                break;

	            case 'Dimension':
	                switch (child.unit) {
	                    // is not supported until IE11
	                    case 'rem':

	                    // v* units is too buggy across browsers and better
	                    // don't merge values with those units
	                    case 'vw':
	                    case 'vh':
	                    case 'vmin':
	                    case 'vmax':
	                    case 'vm': // IE9 supporting "vm" instead of "vmin".
	                        special = child.unit;
	                        break;
	                }
	                break;

	            case 'Hash': // color
	            case 'Number':
	            case 'Percentage':
	                break;

	            case 'Function':
	                if (child.name === 'var') {
	                    return true;
	                }

	                special = child.name;
	                break;

	            case 'WhiteSpace':
	                return false; // ignore space

	            default:
	                return true;  // bad value
	        }

	        values.push({
	            node: child,
	            special: special,
	            important: declaration.important
	        });
	    });

	    if (hasBadValues || values.length > count) {
	        return false;
	    }

	    if (typeof this.iehack === 'string' && this.iehack !== iehack) {
	        return false;
	    }

	    this.iehack = iehack; // move outside

	    return values;
	};

	TRBL.prototype.canOverride = function(side, value) {
	    var currentValue = this.sides[side];

	    return !currentValue || (value.important && !currentValue.important);
	};

	TRBL.prototype.add = function(name, declaration) {
	    function attemptToAdd() {
	        var sides = this.sides;
	        var side = SIDE[name];

	        if (side) {
	            if (side in sides === false) {
	                return false;
	            }

	            var values = this.getValueSequence(declaration, 1);

	            if (!values || !values.length) {
	                return false;
	            }

	            // can mix only if specials are equal
	            for (var key in sides) {
	                if (sides[key] !== null && sides[key].special !== values[0].special) {
	                    return false;
	                }
	            }

	            if (!this.canOverride(side, values[0])) {
	                return true;
	            }

	            sides[side] = values[0];
	            return true;
	        } else if (name === this.name) {
	            var values = this.getValueSequence(declaration, 4);

	            if (!values || !values.length) {
	                return false;
	            }

	            switch (values.length) {
	                case 1:
	                    values[RIGHT] = values[TOP];
	                    values[BOTTOM] = values[TOP];
	                    values[LEFT] = values[TOP];
	                    break;

	                case 2:
	                    values[BOTTOM] = values[TOP];
	                    values[LEFT] = values[RIGHT];
	                    break;

	                case 3:
	                    values[LEFT] = values[RIGHT];
	                    break;
	            }

	            // can mix only if specials are equal
	            for (var i = 0; i < 4; i++) {
	                for (var key in sides) {
	                    if (sides[key] !== null && sides[key].special !== values[i].special) {
	                        return false;
	                    }
	                }
	            }

	            for (var i = 0; i < 4; i++) {
	                if (this.canOverride(SIDES[i], values[i])) {
	                    sides[SIDES[i]] = values[i];
	                }
	            }

	            return true;
	        }
	    }

	    if (!attemptToAdd.call(this)) {
	        return false;
	    }

	    // TODO: use it when we can refer to several points in source
	    // if (this.loc) {
	    //     this.loc = {
	    //         primary: this.loc,
	    //         merged: declaration.loc
	    //     };
	    // } else {
	    //     this.loc = declaration.loc;
	    // }
	    if (!this.loc) {
	        this.loc = declaration.loc;
	    }

	    return true;
	};

	TRBL.prototype.isOkToMinimize = function() {
	    var top = this.sides.top;
	    var right = this.sides.right;
	    var bottom = this.sides.bottom;
	    var left = this.sides.left;

	    if (top && right && bottom && left) {
	        var important =
	            top.important +
	            right.important +
	            bottom.important +
	            left.important;

	        return important === 0 || important === 4;
	    }

	    return false;
	};

	TRBL.prototype.getValue = function() {
	    var result = new List$3();
	    var sides = this.sides;
	    var values = [
	        sides.top,
	        sides.right,
	        sides.bottom,
	        sides.left
	    ];
	    var stringValues = [
	        generate$3(sides.top.node),
	        generate$3(sides.right.node),
	        generate$3(sides.bottom.node),
	        generate$3(sides.left.node)
	    ];

	    if (stringValues[LEFT] === stringValues[RIGHT]) {
	        values.pop();
	        if (stringValues[BOTTOM] === stringValues[TOP]) {
	            values.pop();
	            if (stringValues[RIGHT] === stringValues[TOP]) {
	                values.pop();
	            }
	        }
	    }

	    for (var i = 0; i < values.length; i++) {
	        if (i) {
	            result.appendData({ type: 'WhiteSpace', value: ' ' });
	        }

	        result.appendData(values[i].node);
	    }

	    if (this.iehack) {
	        result.appendData({ type: 'WhiteSpace', value: ' ' });
	        result.appendData({
	            type: 'Identifier',
	            loc: null,
	            name: this.iehack
	        });
	    }

	    return {
	        type: 'Value',
	        loc: null,
	        children: result
	    };
	};

	TRBL.prototype.getDeclaration = function() {
	    return {
	        type: 'Declaration',
	        loc: this.loc,
	        important: this.sides.top.important,
	        property: this.name,
	        value: this.getValue()
	    };
	};

	function processRule$2(rule, shorts, shortDeclarations, lastShortSelector) {
	    var declarations = rule.block.children;
	    var selector = rule.prelude.children.first().id;

	    rule.block.children.eachRight(function(declaration, item) {
	        var property = declaration.property;

	        if (!MAIN_PROPERTY.hasOwnProperty(property)) {
	            return;
	        }

	        var key = MAIN_PROPERTY[property];
	        var shorthand;
	        var operation;

	        if (!lastShortSelector || selector === lastShortSelector) {
	            if (key in shorts) {
	                operation = REMOVE;
	                shorthand = shorts[key];
	            }
	        }

	        if (!shorthand || !shorthand.add(property, declaration)) {
	            operation = REPLACE;
	            shorthand = new TRBL(key);

	            // if can't parse value ignore it and break shorthand children
	            if (!shorthand.add(property, declaration)) {
	                lastShortSelector = null;
	                return;
	            }
	        }

	        shorts[key] = shorthand;
	        shortDeclarations.push({
	            operation: operation,
	            block: declarations,
	            item: item,
	            shorthand: shorthand
	        });

	        lastShortSelector = selector;
	    });

	    return lastShortSelector;
	}

	function processShorthands(shortDeclarations, markDeclaration) {
	    shortDeclarations.forEach(function(item) {
	        var shorthand = item.shorthand;

	        if (!shorthand.isOkToMinimize()) {
	            return;
	        }

	        if (item.operation === REPLACE) {
	            item.item.data = markDeclaration(shorthand.getDeclaration());
	        } else {
	            item.block.remove(item.item);
	        }
	    });
	}

	var _4RestructShorthand = function restructBlock(ast, indexer) {
	    var stylesheetMap = {};
	    var shortDeclarations = [];

	    walk$7(ast, {
	        visit: 'Rule',
	        reverse: true,
	        enter: function(node) {
	            var stylesheet = this.block || this.stylesheet;
	            var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
	            var ruleMap;
	            var shorts;

	            if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
	                ruleMap = {
	                    lastShortSelector: null
	                };
	                stylesheetMap[stylesheet.id] = ruleMap;
	            } else {
	                ruleMap = stylesheetMap[stylesheet.id];
	            }

	            if (ruleMap.hasOwnProperty(ruleId)) {
	                shorts = ruleMap[ruleId];
	            } else {
	                shorts = {};
	                ruleMap[ruleId] = shorts;
	            }

	            ruleMap.lastShortSelector = processRule$2.call(this, node, shorts, shortDeclarations, ruleMap.lastShortSelector);
	        }
	    });

	    processShorthands(shortDeclarations, indexer.declaration);
	};

	var resolveProperty = csstree_min.property;
	var resolveKeyword$4 = csstree_min.keyword;
	var walk$8 = csstree_min.walk;
	var generate$4 = csstree_min.generate;
	var fingerprintId = 1;
	var dontRestructure = {
	    'src': 1 // https://github.com/afelix/csso/issues/50
	};

	var DONT_MIX_VALUE = {
	    // https://developer.mozilla.org/en-US/docs/Web/CSS/display#Browser_compatibility
	    'display': /table|ruby|flex|-(flex)?box$|grid|contents|run-in/i,
	    // https://developer.mozilla.org/en/docs/Web/CSS/text-align
	    'text-align': /^(start|end|match-parent|justify-all)$/i
	};

	var SAFE_VALUES = {
	    cursor: [
	        'auto', 'crosshair', 'default', 'move', 'text', 'wait', 'help',
	        'n-resize', 'e-resize', 's-resize', 'w-resize',
	        'ne-resize', 'nw-resize', 'se-resize', 'sw-resize',
	        'pointer', 'progress', 'not-allowed', 'no-drop', 'vertical-text', 'all-scroll',
	        'col-resize', 'row-resize'
	    ],
	    overflow: [
	        'hidden', 'visible', 'scroll', 'auto'
	    ],
	    position: [
	        'static', 'relative', 'absolute', 'fixed'
	    ]
	};

	var NEEDLESS_TABLE = {
	    'border-width': ['border'],
	    'border-style': ['border'],
	    'border-color': ['border'],
	    'border-top': ['border'],
	    'border-right': ['border'],
	    'border-bottom': ['border'],
	    'border-left': ['border'],
	    'border-top-width': ['border-top', 'border-width', 'border'],
	    'border-right-width': ['border-right', 'border-width', 'border'],
	    'border-bottom-width': ['border-bottom', 'border-width', 'border'],
	    'border-left-width': ['border-left', 'border-width', 'border'],
	    'border-top-style': ['border-top', 'border-style', 'border'],
	    'border-right-style': ['border-right', 'border-style', 'border'],
	    'border-bottom-style': ['border-bottom', 'border-style', 'border'],
	    'border-left-style': ['border-left', 'border-style', 'border'],
	    'border-top-color': ['border-top', 'border-color', 'border'],
	    'border-right-color': ['border-right', 'border-color', 'border'],
	    'border-bottom-color': ['border-bottom', 'border-color', 'border'],
	    'border-left-color': ['border-left', 'border-color', 'border'],
	    'margin-top': ['margin'],
	    'margin-right': ['margin'],
	    'margin-bottom': ['margin'],
	    'margin-left': ['margin'],
	    'padding-top': ['padding'],
	    'padding-right': ['padding'],
	    'padding-bottom': ['padding'],
	    'padding-left': ['padding'],
	    'font-style': ['font'],
	    'font-variant': ['font'],
	    'font-weight': ['font'],
	    'font-size': ['font'],
	    'font-family': ['font'],
	    'list-style-type': ['list-style'],
	    'list-style-position': ['list-style'],
	    'list-style-image': ['list-style']
	};

	function getPropertyFingerprint(propertyName, declaration, fingerprints) {
	    var realName = resolveProperty(propertyName).basename;

	    if (realName === 'background') {
	        return propertyName + ':' + generate$4(declaration.value);
	    }

	    var declarationId = declaration.id;
	    var fingerprint = fingerprints[declarationId];

	    if (!fingerprint) {
	        switch (declaration.value.type) {
	            case 'Value':
	                var vendorId = '';
	                var iehack = '';
	                var special = {};
	                var raw = false;

	                declaration.value.children.each(function walk(node) {
	                    switch (node.type) {
	                        case 'Value':
	                        case 'Brackets':
	                        case 'Parentheses':
	                            node.children.each(walk);
	                            break;

	                        case 'Raw':
	                            raw = true;
	                            break;

	                        case 'Identifier':
	                            var name = node.name;

	                            if (!vendorId) {
	                                vendorId = resolveKeyword$4(name).vendor;
	                            }

	                            if (/\\[09]/.test(name)) {
	                                iehack = RegExp.lastMatch;
	                            }

	                            if (SAFE_VALUES.hasOwnProperty(realName)) {
	                                if (SAFE_VALUES[realName].indexOf(name) === -1) {
	                                    special[name] = true;
	                                }
	                            } else if (DONT_MIX_VALUE.hasOwnProperty(realName)) {
	                                if (DONT_MIX_VALUE[realName].test(name)) {
	                                    special[name] = true;
	                                }
	                            }

	                            break;

	                        case 'Function':
	                            var name = node.name;

	                            if (!vendorId) {
	                                vendorId = resolveKeyword$4(name).vendor;
	                            }

	                            if (name === 'rect') {
	                                // there are 2 forms of rect:
	                                //   rect(<top>, <right>, <bottom>, <left>) - standart
	                                //   rect(<top> <right> <bottom> <left>) – backwards compatible syntax
	                                // only the same form values can be merged
	                                var hasComma = node.children.some(function(node) {
	                                    return node.type === 'Operator' && node.value === ',';
	                                });
	                                if (!hasComma) {
	                                    name = 'rect-backward';
	                                }
	                            }

	                            special[name + '()'] = true;

	                            // check nested tokens too
	                            node.children.each(walk);

	                            break;

	                        case 'Dimension':
	                            var unit = node.unit;

	                            if (/\\[09]/.test(unit)) {
	                                iehack = RegExp.lastMatch;
	                            }

	                            switch (unit) {
	                                // is not supported until IE11
	                                case 'rem':

	                                // v* units is too buggy across browsers and better
	                                // don't merge values with those units
	                                case 'vw':
	                                case 'vh':
	                                case 'vmin':
	                                case 'vmax':
	                                case 'vm': // IE9 supporting "vm" instead of "vmin".
	                                    special[unit] = true;
	                                    break;
	                            }
	                            break;
	                    }
	                });

	                fingerprint = raw
	                    ? '!' + fingerprintId++
	                    : '!' + Object.keys(special).sort() + '|' + iehack + vendorId;
	                break;

	            case 'Raw':
	                fingerprint = '!' + declaration.value.value;
	                break;

	            default:
	                fingerprint = generate$4(declaration.value);
	        }

	        fingerprints[declarationId] = fingerprint;
	    }

	    return propertyName + fingerprint;
	}

	function needless(props, declaration, fingerprints) {
	    var property = resolveProperty(declaration.property);

	    if (NEEDLESS_TABLE.hasOwnProperty(property.basename)) {
	        var table = NEEDLESS_TABLE[property.basename];

	        for (var i = 0; i < table.length; i++) {
	            var ppre = getPropertyFingerprint(property.prefix + table[i], declaration, fingerprints);
	            var prev = props.hasOwnProperty(ppre) ? props[ppre] : null;

	            if (prev && (!declaration.important || prev.item.data.important)) {
	                return prev;
	            }
	        }
	    }
	}

	function processRule$3(rule, item, list, props, fingerprints) {
	    var declarations = rule.block.children;

	    declarations.eachRight(function(declaration, declarationItem) {
	        var property = declaration.property;
	        var fingerprint = getPropertyFingerprint(property, declaration, fingerprints);
	        var prev = props[fingerprint];

	        if (prev && !dontRestructure.hasOwnProperty(property)) {
	            if (declaration.important && !prev.item.data.important) {
	                props[fingerprint] = {
	                    block: declarations,
	                    item: declarationItem
	                };

	                prev.block.remove(prev.item);

	                // TODO: use it when we can refer to several points in source
	                // declaration.loc = {
	                //     primary: declaration.loc,
	                //     merged: prev.item.data.loc
	                // };
	            } else {
	                declarations.remove(declarationItem);

	                // TODO: use it when we can refer to several points in source
	                // prev.item.data.loc = {
	                //     primary: prev.item.data.loc,
	                //     merged: declaration.loc
	                // };
	            }
	        } else {
	            var prev = needless(props, declaration, fingerprints);

	            if (prev) {
	                declarations.remove(declarationItem);

	                // TODO: use it when we can refer to several points in source
	                // prev.item.data.loc = {
	                //     primary: prev.item.data.loc,
	                //     merged: declaration.loc
	                // };
	            } else {
	                declaration.fingerprint = fingerprint;

	                props[fingerprint] = {
	                    block: declarations,
	                    item: declarationItem
	                };
	            }
	        }
	    });

	    if (declarations.isEmpty()) {
	        list.remove(item);
	    }
	}

	var _6RestructBlock = function restructBlock(ast) {
	    var stylesheetMap = {};
	    var fingerprints = Object.create(null);

	    walk$8(ast, {
	        visit: 'Rule',
	        reverse: true,
	        enter: function(node, item, list) {
	            var stylesheet = this.block || this.stylesheet;
	            var ruleId = (node.pseudoSignature || '') + '|' + node.prelude.children.first().id;
	            var ruleMap;
	            var props;

	            if (!stylesheetMap.hasOwnProperty(stylesheet.id)) {
	                ruleMap = {};
	                stylesheetMap[stylesheet.id] = ruleMap;
	            } else {
	                ruleMap = stylesheetMap[stylesheet.id];
	            }

	            if (ruleMap.hasOwnProperty(ruleId)) {
	                props = ruleMap[ruleId];
	            } else {
	                props = {};
	                ruleMap[ruleId] = props;
	            }

	            processRule$3.call(this, node, item, list, props, fingerprints);
	        }
	    });
	};

	var walk$9 = csstree_min.walk;


	/*
	    At this step all rules has single simple selector. We try to join by equal
	    declaration blocks to first rule, e.g.

	    .a { color: red }
	    b { ... }
	    .b { color: red }
	    ->
	    .a, .b { color: red }
	    b { ... }
	*/

	function processRule$4(node, item, list) {
	    var selectors = node.prelude.children;
	    var declarations = node.block.children;
	    var nodeCompareMarker = selectors.first().compareMarker;
	    var skippedCompareMarkers = {};

	    list.nextUntil(item.next, function(next, nextItem) {
	        // skip non-ruleset node if safe
	        if (next.type !== 'Rule') {
	            return utils$1.unsafeToSkipNode.call(selectors, next);
	        }

	        if (node.pseudoSignature !== next.pseudoSignature) {
	            return true;
	        }

	        var nextFirstSelector = next.prelude.children.head;
	        var nextDeclarations = next.block.children;
	        var nextCompareMarker = nextFirstSelector.data.compareMarker;

	        // if next ruleset has same marked as one of skipped then stop joining
	        if (nextCompareMarker in skippedCompareMarkers) {
	            return true;
	        }

	        // try to join by selectors
	        if (selectors.head === selectors.tail) {
	            if (selectors.first().id === nextFirstSelector.data.id) {
	                declarations.appendList(nextDeclarations);
	                list.remove(nextItem);
	                return;
	            }
	        }

	        // try to join by properties
	        if (utils$1.isEqualDeclarations(declarations, nextDeclarations)) {
	            var nextStr = nextFirstSelector.data.id;

	            selectors.some(function(data, item) {
	                var curStr = data.id;

	                if (nextStr < curStr) {
	                    selectors.insert(nextFirstSelector, item);
	                    return true;
	                }

	                if (!item.next) {
	                    selectors.insert(nextFirstSelector);
	                    return true;
	                }
	            });

	            list.remove(nextItem);
	            return;
	        }

	        // go to next ruleset if current one can be skipped (has no equal specificity nor element selector)
	        if (nextCompareMarker === nodeCompareMarker) {
	            return true;
	        }

	        skippedCompareMarkers[nextCompareMarker] = true;
	    });
	}

	var _7MergeRuleset = function mergeRule(ast) {
	    walk$9(ast, {
	        visit: 'Rule',
	        enter: processRule$4
	    });
	};

	var List$4 = csstree_min.List;
	var walk$a = csstree_min.walk;


	function calcSelectorLength(list) {
	    var length = 0;

	    list.each(function(data) {
	        length += data.id.length + 1;
	    });

	    return length - 1;
	}

	function calcDeclarationsLength(tokens) {
	    var length = 0;

	    for (var i = 0; i < tokens.length; i++) {
	        length += tokens[i].length;
	    }

	    return (
	        length +          // declarations
	        tokens.length - 1 // delimeters
	    );
	}

	function processRule$5(node, item, list) {
	    var avoidRulesMerge = this.block !== null ? this.block.avoidRulesMerge : false;
	    var selectors = node.prelude.children;
	    var block = node.block;
	    var disallowDownMarkers = Object.create(null);
	    var allowMergeUp = true;
	    var allowMergeDown = true;

	    list.prevUntil(item.prev, function(prev, prevItem) {
	        var prevBlock = prev.block;
	        var prevType = prev.type;

	        if (prevType !== 'Rule') {
	            var unsafe = utils$1.unsafeToSkipNode.call(selectors, prev);

	            if (!unsafe && prevType === 'Atrule' && prevBlock) {
	                walk$a(prevBlock, {
	                    visit: 'Rule',
	                    enter: function(node) {
	                        node.prelude.children.each(function(data) {
	                            disallowDownMarkers[data.compareMarker] = true;
	                        });
	                    }
	                });
	            }

	            return unsafe;
	        }

	        var prevSelectors = prev.prelude.children;

	        if (node.pseudoSignature !== prev.pseudoSignature) {
	            return true;
	        }

	        allowMergeDown = !prevSelectors.some(function(selector) {
	            return selector.compareMarker in disallowDownMarkers;
	        });

	        // try prev ruleset if simpleselectors has no equal specifity and element selector
	        if (!allowMergeDown && !allowMergeUp) {
	            return true;
	        }

	        // try to join by selectors
	        if (allowMergeUp && utils$1.isEqualSelectors(prevSelectors, selectors)) {
	            prevBlock.children.appendList(block.children);
	            list.remove(item);
	            return true;
	        }

	        // try to join by properties
	        var diff = utils$1.compareDeclarations(block.children, prevBlock.children);

	        // console.log(diff.eq, diff.ne1, diff.ne2);

	        if (diff.eq.length) {
	            if (!diff.ne1.length && !diff.ne2.length) {
	                // equal blocks
	                if (allowMergeDown) {
	                    utils$1.addSelectors(selectors, prevSelectors);
	                    list.remove(prevItem);
	                }

	                return true;
	            } else if (!avoidRulesMerge) { /* probably we don't need to prevent those merges for @keyframes
	                                              TODO: need to be checked */

	                if (diff.ne1.length && !diff.ne2.length) {
	                    // prevBlock is subset block
	                    var selectorLength = calcSelectorLength(selectors);
	                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

	                    if (allowMergeUp && selectorLength < blockLength) {
	                        utils$1.addSelectors(prevSelectors, selectors);
	                        block.children = new List$4().fromArray(diff.ne1);
	                    }
	                } else if (!diff.ne1.length && diff.ne2.length) {
	                    // node is subset of prevBlock
	                    var selectorLength = calcSelectorLength(prevSelectors);
	                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

	                    if (allowMergeDown && selectorLength < blockLength) {
	                        utils$1.addSelectors(selectors, prevSelectors);
	                        prevBlock.children = new List$4().fromArray(diff.ne2);
	                    }
	                } else {
	                    // diff.ne1.length && diff.ne2.length
	                    // extract equal block
	                    var newSelector = {
	                        type: 'SelectorList',
	                        loc: null,
	                        children: utils$1.addSelectors(prevSelectors.copy(), selectors)
	                    };
	                    var newBlockLength = calcSelectorLength(newSelector.children) + 2; // selectors length + curly braces length
	                    var blockLength = calcDeclarationsLength(diff.eq); // declarations length

	                    // create new ruleset if declarations length greater than
	                    // ruleset description overhead
	                    if (blockLength >= newBlockLength) {
	                        var newItem = list.createItem({
	                            type: 'Rule',
	                            loc: null,
	                            prelude: newSelector,
	                            block: {
	                                type: 'Block',
	                                loc: null,
	                                children: new List$4().fromArray(diff.eq)
	                            },
	                            pseudoSignature: node.pseudoSignature
	                        });

	                        block.children = new List$4().fromArray(diff.ne1);
	                        prevBlock.children = new List$4().fromArray(diff.ne2overrided);

	                        if (allowMergeUp) {
	                            list.insert(newItem, prevItem);
	                        } else {
	                            list.insert(newItem, item);
	                        }

	                        return true;
	                    }
	                }
	            }
	        }

	        if (allowMergeUp) {
	            // TODO: disallow up merge only if any property interception only (i.e. diff.ne2overrided.length > 0);
	            // await property families to find property interception correctly
	            allowMergeUp = !prevSelectors.some(function(prevSelector) {
	                return selectors.some(function(selector) {
	                    return selector.compareMarker === prevSelector.compareMarker;
	                });
	            });
	        }

	        prevSelectors.each(function(data) {
	            disallowDownMarkers[data.compareMarker] = true;
	        });
	    });
	}

	var _8RestructRuleset = function restructRule(ast) {
	    walk$a(ast, {
	        visit: 'Rule',
	        reverse: true,
	        enter: processRule$5
	    });
	};

	var restructure = function(ast, options) {
	    // prepare ast for restructing
	    var indexer = prepare(ast, options);
	    options.logger('prepare', ast);

	    _1MergeAtrule(ast, options);
	    options.logger('mergeAtrule', ast);

	    _2InitialMergeRuleset(ast);
	    options.logger('initialMergeRuleset', ast);

	    _3DisjoinRuleset(ast);
	    options.logger('disjoinRuleset', ast);

	    _4RestructShorthand(ast, indexer);
	    options.logger('restructShorthand', ast);

	    _6RestructBlock(ast);
	    options.logger('restructBlock', ast);

	    _7MergeRuleset(ast);
	    options.logger('mergeRuleset', ast);

	    _8RestructRuleset(ast);
	    options.logger('restructRuleset', ast);
	};

	var List$5 = csstree_min.List;
	var clone = csstree_min.clone;




	var walk$b = csstree_min.walk;

	function readChunk(children, specialComments) {
	    var buffer = new List$5();
	    var nonSpaceTokenInBuffer = false;
	    var protectedComment;

	    children.nextUntil(children.head, function(node, item, list) {
	        if (node.type === 'Comment') {
	            if (!specialComments || node.value.charAt(0) !== '!') {
	                list.remove(item);
	                return;
	            }

	            if (nonSpaceTokenInBuffer || protectedComment) {
	                return true;
	            }

	            list.remove(item);
	            protectedComment = node;
	            return;
	        }

	        if (node.type !== 'WhiteSpace') {
	            nonSpaceTokenInBuffer = true;
	        }

	        buffer.insert(list.remove(item));
	    });

	    return {
	        comment: protectedComment,
	        stylesheet: {
	            type: 'StyleSheet',
	            loc: null,
	            children: buffer
	        }
	    };
	}

	function compressChunk(ast, firstAtrulesAllowed, num, options) {
	    options.logger('Compress block #' + num, null, true);

	    var seed = 1;

	    if (ast.type === 'StyleSheet') {
	        ast.firstAtrulesAllowed = firstAtrulesAllowed;
	        ast.id = seed++;
	    }

	    walk$b(ast, {
	        visit: 'Atrule',
	        enter: function markScopes(node) {
	            if (node.block !== null) {
	                node.block.id = seed++;
	            }
	        }
	    });
	    options.logger('init', ast);

	    // remove redundant
	    clean(ast, options);
	    options.logger('clean', ast);

	    // replace nodes for shortened forms
	    replace(ast);
	    options.logger('replace', ast);

	    // structure optimisations
	    if (options.restructuring) {
	        restructure(ast, options);
	    }

	    return ast;
	}

	function getCommentsOption(options) {
	    var comments = 'comments' in options ? options.comments : 'exclamation';

	    if (typeof comments === 'boolean') {
	        comments = comments ? 'exclamation' : false;
	    } else if (comments !== 'exclamation' && comments !== 'first-exclamation') {
	        comments = false;
	    }

	    return comments;
	}

	function getRestructureOption(options) {
	    if ('restructure' in options) {
	        return options.restructure;
	    }

	    return 'restructuring' in options ? options.restructuring : true;
	}

	function wrapBlock(block) {
	    return new List$5().appendData({
	        type: 'Rule',
	        loc: null,
	        prelude: {
	            type: 'SelectorList',
	            loc: null,
	            children: new List$5().appendData({
	                type: 'Selector',
	                loc: null,
	                children: new List$5().appendData({
	                    type: 'TypeSelector',
	                    loc: null,
	                    name: 'x'
	                })
	            })
	        },
	        block: block
	    });
	}

	var compress = function compress(ast, options) {
	    ast = ast || { type: 'StyleSheet', loc: null, children: new List$5() };
	    options = options || {};

	    var compressOptions = {
	        logger: typeof options.logger === 'function' ? options.logger : function() {},
	        restructuring: getRestructureOption(options),
	        forceMediaMerge: Boolean(options.forceMediaMerge),
	        usage: options.usage ? usage.buildIndex(options.usage) : false
	    };
	    var specialComments = getCommentsOption(options);
	    var firstAtrulesAllowed = true;
	    var input;
	    var output = new List$5();
	    var chunk;
	    var chunkNum = 1;
	    var chunkChildren;

	    if (options.clone) {
	        ast = clone(ast);
	    }

	    if (ast.type === 'StyleSheet') {
	        input = ast.children;
	        ast.children = output;
	    } else {
	        input = wrapBlock(ast);
	    }

	    do {
	        chunk = readChunk(input, Boolean(specialComments));
	        compressChunk(chunk.stylesheet, firstAtrulesAllowed, chunkNum++, compressOptions);
	        chunkChildren = chunk.stylesheet.children;

	        if (chunk.comment) {
	            // add \n before comment if there is another content in output
	            if (!output.isEmpty()) {
	                output.insert(List$5.createItem({
	                    type: 'Raw',
	                    value: '\n'
	                }));
	            }

	            output.insert(List$5.createItem(chunk.comment));

	            // add \n after comment if chunk is not empty
	            if (!chunkChildren.isEmpty()) {
	                output.insert(List$5.createItem({
	                    type: 'Raw',
	                    value: '\n'
	                }));
	            }
	        }

	        if (firstAtrulesAllowed && !chunkChildren.isEmpty()) {
	            var lastRule = chunkChildren.last();

	            if (lastRule.type !== 'Atrule' ||
	               (lastRule.name !== 'import' && lastRule.name !== 'charset')) {
	                firstAtrulesAllowed = false;
	            }
	        }

	        if (specialComments !== 'exclamation') {
	            specialComments = false;
	        }

	        output.appendList(chunkChildren);
	    } while (!input.isEmpty());

	    return {
	        ast: ast
	    };
	};

	var version = "4.2.0";
	var _package = {
		version: version
	};

	var _package$1 = /*#__PURE__*/Object.freeze({
		__proto__: null,
		version: version,
		'default': _package
	});

	var require$$0 = getCjsExportFromNamespace(_package$1);

	var parse = csstree_min.parse;

	var generate$5 = csstree_min.generate;

	function debugOutput(name, options, startTime, data) {
	    if (options.debug) {
	        console.error('## ' + name + ' done in %d ms\n', Date.now() - startTime);
	    }

	    return data;
	}

	function createDefaultLogger(level) {
	    var lastDebug;

	    return function logger(title, ast) {
	        var line = title;

	        if (ast) {
	            line = '[' + ((Date.now() - lastDebug) / 1000).toFixed(3) + 's] ' + line;
	        }

	        if (level > 1 && ast) {
	            var css = generate$5(ast);

	            // when level 2, limit css to 256 symbols
	            if (level === 2 && css.length > 256) {
	                css = css.substr(0, 256) + '...';
	            }

	            line += '\n  ' + css + '\n';
	        }

	        console.error(line);
	        lastDebug = Date.now();
	    };
	}

	function copy(obj) {
	    var result = {};

	    for (var key in obj) {
	        result[key] = obj[key];
	    }

	    return result;
	}

	function buildCompressOptions(options) {
	    options = copy(options);

	    if (typeof options.logger !== 'function' && options.debug) {
	        options.logger = createDefaultLogger(options.debug);
	    }

	    return options;
	}

	function runHandler(ast, options, handlers) {
	    if (!Array.isArray(handlers)) {
	        handlers = [handlers];
	    }

	    handlers.forEach(function(fn) {
	        fn(ast, options);
	    });
	}

	function minify(context, source, options) {
	    options = options || {};

	    var filename = options.filename || '<unknown>';
	    var result;

	    // parse
	    var ast = debugOutput('parsing', options, Date.now(),
	        parse(source, {
	            context: context,
	            filename: filename,
	            positions: Boolean(options.sourceMap)
	        })
	    );

	    // before compress handlers
	    if (options.beforeCompress) {
	        debugOutput('beforeCompress', options, Date.now(),
	            runHandler(ast, options, options.beforeCompress)
	        );
	    }

	    // compress
	    var compressResult = debugOutput('compress', options, Date.now(),
	        compress(ast, buildCompressOptions(options))
	    );

	    // after compress handlers
	    if (options.afterCompress) {
	        debugOutput('afterCompress', options, Date.now(),
	            runHandler(compressResult, options, options.afterCompress)
	        );
	    }

	    // generate
	    if (options.sourceMap) {
	        result = debugOutput('generate(sourceMap: true)', options, Date.now(), (function() {
	            var tmp = generate$5(compressResult.ast, { sourceMap: true });
	            tmp.map._file = filename; // since other tools can relay on file in source map transform chain
	            tmp.map.setSourceContent(filename, source);
	            return tmp;
	        }()));
	    } else {
	        result = debugOutput('generate', options, Date.now(), {
	            css: generate$5(compressResult.ast),
	            map: null
	        });
	    }

	    return result;
	}

	function minifyStylesheet(source, options) {
	    return minify('stylesheet', source, options);
	}

	function minifyBlock(source, options) {
	    return minify('declarationList', source, options);
	}

	var lib = {
	    version: require$$0.version,

	    // main methods
	    minify: minifyStylesheet,
	    minifyBlock: minifyBlock,

	    // css syntax parser/walkers/generator/etc
	    syntax: Object.assign({
	        compress: compress
	    }, csstree_min)
	};
	var lib_1 = lib.version;
	var lib_2 = lib.minify;
	var lib_3 = lib.minifyBlock;
	var lib_4 = lib.syntax;

	exports.default = lib;
	exports.minify = lib_2;
	exports.minifyBlock = lib_3;
	exports.syntax = lib_4;
	exports.version = lib_1;

	Object.defineProperty(exports, '__esModule', { value: true });

})));