Deployed the page to Github Pages.

node_modules/postcss/lib/at-rule.js

@@ -0,0 +1,25 @@
+'use strict'
+
+let Container = require('./container')
+
+class AtRule extends Container {
+  constructor(defaults) {
+    super(defaults)
+    this.type = 'atrule'
+  }
+
+  append(...children) {
+    if (!this.proxyOf.nodes) this.nodes = []
+    return super.append(...children)
+  }
+
+  prepend(...children) {
+    if (!this.proxyOf.nodes) this.nodes = []
+    return super.prepend(...children)
+  }
+}
+
+module.exports = AtRule
+AtRule.default = AtRule
+
+Container.registerAtRule(AtRule)

node_modules/postcss/lib/comment.js

@@ -0,0 +1,13 @@
+'use strict'
+
+let Node = require('./node')
+
+class Comment extends Node {
+  constructor(defaults) {
+    super(defaults)
+    this.type = 'comment'
+  }
+}
+
+module.exports = Comment
+Comment.default = Comment

node_modules/postcss/lib/container.js

@@ -0,0 +1,445 @@
+'use strict'
+
+let { isClean, my } = require('./symbols')
+let Declaration = require('./declaration')
+let Comment = require('./comment')
+let Node = require('./node')
+
+let parse, Rule, AtRule, Root
+
+function cleanSource(nodes) {
+  return nodes.map(i => {
+    if (i.nodes) i.nodes = cleanSource(i.nodes)
+    delete i.source
+    return i
+  })
+}
+
+function markTreeDirty(node) {
+  node[isClean] = false
+  if (node.proxyOf.nodes) {
+    for (let i of node.proxyOf.nodes) {
+      markTreeDirty(i)
+    }
+  }
+}
+
+class Container extends Node {
+  append(...children) {
+    for (let child of children) {
+      let nodes = this.normalize(child, this.last)
+      for (let node of nodes) this.proxyOf.nodes.push(node)
+    }
+
+    this.markDirty()
+
+    return this
+  }
+
+  cleanRaws(keepBetween) {
+    super.cleanRaws(keepBetween)
+    if (this.nodes) {
+      for (let node of this.nodes) node.cleanRaws(keepBetween)
+    }
+  }
+
+  each(callback) {
+    if (!this.proxyOf.nodes) return undefined
+    let iterator = this.getIterator()
+
+    let index, result
+    while (this.indexes[iterator] < this.proxyOf.nodes.length) {
+      index = this.indexes[iterator]
+      result = callback(this.proxyOf.nodes[index], index)
+      if (result === false) break
+
+      this.indexes[iterator] += 1
+    }
+
+    delete this.indexes[iterator]
+    return result
+  }
+
+  every(condition) {
+    return this.nodes.every(condition)
+  }
+
+  getIterator() {
+    if (!this.lastEach) this.lastEach = 0
+    if (!this.indexes) this.indexes = {}
+
+    this.lastEach += 1
+    let iterator = this.lastEach
+    this.indexes[iterator] = 0
+
+    return iterator
+  }
+
+  getProxyProcessor() {
+    return {
+      get(node, prop) {
+        if (prop === 'proxyOf') {
+          return node
+        } else if (!node[prop]) {
+          return node[prop]
+        } else if (
+          prop === 'each' ||
+          (typeof prop === 'string' && prop.startsWith('walk'))
+        ) {
+          return (...args) => {
+            return node[prop](
+              ...args.map(i => {
+                if (typeof i === 'function') {
+                  return (child, index) => i(child.toProxy(), index)
+                } else {
+                  return i
+                }
+              })
+            )
+          }
+        } else if (prop === 'every' || prop === 'some') {
+          return cb => {
+            return node[prop]((child, ...other) =>
+              cb(child.toProxy(), ...other)
+            )
+          }
+        } else if (prop === 'root') {
+          return () => node.root().toProxy()
+        } else if (prop === 'nodes') {
+          return node.nodes.map(i => i.toProxy())
+        } else if (prop === 'first' || prop === 'last') {
+          return node[prop].toProxy()
+        } else {
+          return node[prop]
+        }
+      },
+
+      set(node, prop, value) {
+        if (node[prop] === value) return true
+        node[prop] = value
+        if (prop === 'name' || prop === 'params' || prop === 'selector') {
+          node.markDirty()
+        }
+        return true
+      }
+    }
+  }
+
+  index(child) {
+    if (typeof child === 'number') return child
+    if (child.proxyOf) child = child.proxyOf
+    return this.proxyOf.nodes.indexOf(child)
+  }
+
+  insertAfter(exist, add) {
+    let existIndex = this.index(exist)
+    let nodes = this.normalize(add, this.proxyOf.nodes[existIndex]).reverse()
+    existIndex = this.index(exist)
+    for (let node of nodes) this.proxyOf.nodes.splice(existIndex + 1, 0, node)
+
+    let index
+    for (let id in this.indexes) {
+      index = this.indexes[id]
+      if (existIndex < index) {
+        this.indexes[id] = index + nodes.length
+      }
+    }
+
+    this.markDirty()
+
+    return this
+  }
+
+  insertBefore(exist, add) {
+    let existIndex = this.index(exist)
+    let type = existIndex === 0 ? 'prepend' : false
+    let nodes = this.normalize(
+      add,
+      this.proxyOf.nodes[existIndex],
+      type
+    ).reverse()
+    existIndex = this.index(exist)
+    for (let node of nodes) this.proxyOf.nodes.splice(existIndex, 0, node)
+
+    let index
+    for (let id in this.indexes) {
+      index = this.indexes[id]
+      if (existIndex <= index) {
+        this.indexes[id] = index + nodes.length
+      }
+    }
+
+    this.markDirty()
+
+    return this
+  }
+
+  normalize(nodes, sample) {
+    if (typeof nodes === 'string') {
+      nodes = cleanSource(parse(nodes).nodes)
+    } else if (typeof nodes === 'undefined') {
+      nodes = []
+    } else if (Array.isArray(nodes)) {
+      nodes = nodes.slice(0)
+      for (let i of nodes) {
+        if (i.parent) i.parent.removeChild(i, 'ignore')
+      }
+    } else if (nodes.type === 'root' && this.type !== 'document') {
+      nodes = nodes.nodes.slice(0)
+      for (let i of nodes) {
+        if (i.parent) i.parent.removeChild(i, 'ignore')
+      }
+    } else if (nodes.type) {
+      nodes = [nodes]
+    } else if (nodes.prop) {
+      if (typeof nodes.value === 'undefined') {
+        throw new Error('Value field is missed in node creation')
+      } else if (typeof nodes.value !== 'string') {
+        nodes.value = String(nodes.value)
+      }
+      nodes = [new Declaration(nodes)]
+    } else if (nodes.selector || nodes.selectors) {
+      nodes = [new Rule(nodes)]
+    } else if (nodes.name) {
+      nodes = [new AtRule(nodes)]
+    } else if (nodes.text) {
+      nodes = [new Comment(nodes)]
+    } else {
+      throw new Error('Unknown node type in node creation')
+    }
+
+    let processed = nodes.map(i => {
+      /* c8 ignore next */
+      if (!i[my]) Container.rebuild(i)
+      i = i.proxyOf
+      if (i.parent) i.parent.removeChild(i)
+      if (i[isClean]) markTreeDirty(i)
+      if (typeof i.raws.before === 'undefined') {
+        if (sample && typeof sample.raws.before !== 'undefined') {
+          i.raws.before = sample.raws.before.replace(/\S/g, '')
+        }
+      }
+      i.parent = this.proxyOf
+      return i
+    })
+
+    return processed
+  }
+
+  prepend(...children) {
+    children = children.reverse()
+    for (let child of children) {
+      let nodes = this.normalize(child, this.first, 'prepend').reverse()
+      for (let node of nodes) this.proxyOf.nodes.unshift(node)
+      for (let id in this.indexes) {
+        this.indexes[id] = this.indexes[id] + nodes.length
+      }
+    }
+
+    this.markDirty()
+
+    return this
+  }
+
+  push(child) {
+    child.parent = this
+    this.proxyOf.nodes.push(child)
+    return this
+  }
+
+  removeAll() {
+    for (let node of this.proxyOf.nodes) node.parent = undefined
+    this.proxyOf.nodes = []
+
+    this.markDirty()
+
+    return this
+  }
+
+  removeChild(child) {
+    child = this.index(child)
+    this.proxyOf.nodes[child].parent = undefined
+    this.proxyOf.nodes.splice(child, 1)
+
+    let index
+    for (let id in this.indexes) {
+      index = this.indexes[id]
+      if (index >= child) {
+        this.indexes[id] = index - 1
+      }
+    }
+
+    this.markDirty()
+
+    return this
+  }
+
+  replaceValues(pattern, opts, callback) {
+    if (!callback) {
+      callback = opts
+      opts = {}
+    }
+
+    this.walkDecls(decl => {
+      if (opts.props && !opts.props.includes(decl.prop)) return
+      if (opts.fast && !decl.value.includes(opts.fast)) return
+
+      decl.value = decl.value.replace(pattern, callback)
+    })
+
+    this.markDirty()
+
+    return this
+  }
+
+  some(condition) {
+    return this.nodes.some(condition)
+  }
+
+  walk(callback) {
+    return this.each((child, i) => {
+      let result
+      try {
+        result = callback(child, i)
+      } catch (e) {
+        throw child.addToError(e)
+      }
+      if (result !== false && child.walk) {
+        result = child.walk(callback)
+      }
+
+      return result
+    })
+  }
+
+  walkAtRules(name, callback) {
+    if (!callback) {
+      callback = name
+      return this.walk((child, i) => {
+        if (child.type === 'atrule') {
+          return callback(child, i)
+        }
+      })
+    }
+    if (name instanceof RegExp) {
+      return this.walk((child, i) => {
+        if (child.type === 'atrule' && name.test(child.name)) {
+          return callback(child, i)
+        }
+      })
+    }
+    return this.walk((child, i) => {
+      if (child.type === 'atrule' && child.name === name) {
+        return callback(child, i)
+      }
+    })
+  }
+
+  walkComments(callback) {
+    return this.walk((child, i) => {
+      if (child.type === 'comment') {
+        return callback(child, i)
+      }
+    })
+  }
+
+  walkDecls(prop, callback) {
+    if (!callback) {
+      callback = prop
+      return this.walk((child, i) => {
+        if (child.type === 'decl') {
+          return callback(child, i)
+        }
+      })
+    }
+    if (prop instanceof RegExp) {
+      return this.walk((child, i) => {
+        if (child.type === 'decl' && prop.test(child.prop)) {
+          return callback(child, i)
+        }
+      })
+    }
+    return this.walk((child, i) => {
+      if (child.type === 'decl' && child.prop === prop) {
+        return callback(child, i)
+      }
+    })
+  }
+
+  walkRules(selector, callback) {
+    if (!callback) {
+      callback = selector
+
+      return this.walk((child, i) => {
+        if (child.type === 'rule') {
+          return callback(child, i)
+        }
+      })
+    }
+    if (selector instanceof RegExp) {
+      return this.walk((child, i) => {
+        if (child.type === 'rule' && selector.test(child.selector)) {
+          return callback(child, i)
+        }
+      })
+    }
+    return this.walk((child, i) => {
+      if (child.type === 'rule' && child.selector === selector) {
+        return callback(child, i)
+      }
+    })
+  }
+
+  get first() {
+    if (!this.proxyOf.nodes) return undefined
+    return this.proxyOf.nodes[0]
+  }
+
+  get last() {
+    if (!this.proxyOf.nodes) return undefined
+    return this.proxyOf.nodes[this.proxyOf.nodes.length - 1]
+  }
+}
+
+Container.registerParse = dependant => {
+  parse = dependant
+}
+
+Container.registerRule = dependant => {
+  Rule = dependant
+}
+
+Container.registerAtRule = dependant => {
+  AtRule = dependant
+}
+
+Container.registerRoot = dependant => {
+  Root = dependant
+}
+
+module.exports = Container
+Container.default = Container
+
+/* c8 ignore start */
+Container.rebuild = node => {
+  if (node.type === 'atrule') {
+    Object.setPrototypeOf(node, AtRule.prototype)
+  } else if (node.type === 'rule') {
+    Object.setPrototypeOf(node, Rule.prototype)
+  } else if (node.type === 'decl') {
+    Object.setPrototypeOf(node, Declaration.prototype)
+  } else if (node.type === 'comment') {
+    Object.setPrototypeOf(node, Comment.prototype)
+  } else if (node.type === 'root') {
+    Object.setPrototypeOf(node, Root.prototype)
+  }
+
+  node[my] = true
+
+  if (node.nodes) {
+    node.nodes.forEach(child => {
+      Container.rebuild(child)
+    })
+  }
+}
+/* c8 ignore stop */

node_modules/postcss/lib/css-syntax-error.js

@@ -0,0 +1,100 @@
+'use strict'
+
+let pico = require('picocolors')
+
+let terminalHighlight = require('./terminal-highlight')
+
+class CssSyntaxError extends Error {
+  constructor(message, line, column, source, file, plugin) {
+    super(message)
+    this.name = 'CssSyntaxError'
+    this.reason = message
+
+    if (file) {
+      this.file = file
+    }
+    if (source) {
+      this.source = source
+    }
+    if (plugin) {
+      this.plugin = plugin
+    }
+    if (typeof line !== 'undefined' && typeof column !== 'undefined') {
+      if (typeof line === 'number') {
+        this.line = line
+        this.column = column
+      } else {
+        this.line = line.line
+        this.column = line.column
+        this.endLine = column.line
+        this.endColumn = column.column
+      }
+    }
+
+    this.setMessage()
+
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, CssSyntaxError)
+    }
+  }
+
+  setMessage() {
+    this.message = this.plugin ? this.plugin + ': ' : ''
+    this.message += this.file ? this.file : '<css input>'
+    if (typeof this.line !== 'undefined') {
+      this.message += ':' + this.line + ':' + this.column
+    }
+    this.message += ': ' + this.reason
+  }
+
+  showSourceCode(color) {
+    if (!this.source) return ''
+
+    let css = this.source
+    if (color == null) color = pico.isColorSupported
+    if (terminalHighlight) {
+      if (color) css = terminalHighlight(css)
+    }
+
+    let lines = css.split(/\r?\n/)
+    let start = Math.max(this.line - 3, 0)
+    let end = Math.min(this.line + 2, lines.length)
+
+    let maxWidth = String(end).length
+
+    let mark, aside
+    if (color) {
+      let { bold, gray, red } = pico.createColors(true)
+      mark = text => bold(red(text))
+      aside = text => gray(text)
+    } else {
+      mark = aside = str => str
+    }
+
+    return lines
+      .slice(start, end)
+      .map((line, index) => {
+        let number = start + 1 + index
+        let gutter = ' ' + (' ' + number).slice(-maxWidth) + ' | '
+        if (number === this.line) {
+          let spacing =
+            aside(gutter.replace(/\d/g, ' ')) +
+            line.slice(0, this.column - 1).replace(/[^\t]/g, ' ')
+          return mark('>') + aside(gutter) + line + '\n ' + spacing + mark('^')
+        }
+        return ' ' + aside(gutter) + line
+      })
+      .join('\n')
+  }
+
+  toString() {
+    let code = this.showSourceCode()
+    if (code) {
+      code = '\n\n' + code + '\n'
+    }
+    return this.name + ': ' + this.message + code
+  }
+}
+
+module.exports = CssSyntaxError
+CssSyntaxError.default = CssSyntaxError

node_modules/postcss/lib/declaration.js

@@ -0,0 +1,24 @@
+'use strict'
+
+let Node = require('./node')
+
+class Declaration extends Node {
+  constructor(defaults) {
+    if (
+      defaults &&
+      typeof defaults.value !== 'undefined' &&
+      typeof defaults.value !== 'string'
+    ) {
+      defaults = { ...defaults, value: String(defaults.value) }
+    }
+    super(defaults)
+    this.type = 'decl'
+  }
+
+  get variable() {
+    return this.prop.startsWith('--') || this.prop[0] === '$'
+  }
+}
+
+module.exports = Declaration
+Declaration.default = Declaration

node_modules/postcss/lib/input.js

@@ -0,0 +1,248 @@
+'use strict'
+
+let { SourceMapConsumer, SourceMapGenerator } = require('source-map-js')
+let { fileURLToPath, pathToFileURL } = require('url')
+let { isAbsolute, resolve } = require('path')
+let { nanoid } = require('nanoid/non-secure')
+
+let terminalHighlight = require('./terminal-highlight')
+let CssSyntaxError = require('./css-syntax-error')
+let PreviousMap = require('./previous-map')
+
+let fromOffsetCache = Symbol('fromOffsetCache')
+
+let sourceMapAvailable = Boolean(SourceMapConsumer && SourceMapGenerator)
+let pathAvailable = Boolean(resolve && isAbsolute)
+
+class Input {
+  constructor(css, opts = {}) {
+    if (
+      css === null ||
+      typeof css === 'undefined' ||
+      (typeof css === 'object' && !css.toString)
+    ) {
+      throw new Error(`PostCSS received ${css} instead of CSS string`)
+    }
+
+    this.css = css.toString()
+
+    if (this.css[0] === '\uFEFF' || this.css[0] === '\uFFFE') {
+      this.hasBOM = true
+      this.css = this.css.slice(1)
+    } else {
+      this.hasBOM = false
+    }
+
+    if (opts.from) {
+      if (
+        !pathAvailable ||
+        /^\w+:\/\//.test(opts.from) ||
+        isAbsolute(opts.from)
+      ) {
+        this.file = opts.from
+      } else {
+        this.file = resolve(opts.from)
+      }
+    }
+
+    if (pathAvailable && sourceMapAvailable) {
+      let map = new PreviousMap(this.css, opts)
+      if (map.text) {
+        this.map = map
+        let file = map.consumer().file
+        if (!this.file && file) this.file = this.mapResolve(file)
+      }
+    }
+
+    if (!this.file) {
+      this.id = '<input css ' + nanoid(6) + '>'
+    }
+    if (this.map) this.map.file = this.from
+  }
+
+  error(message, line, column, opts = {}) {
+    let result, endLine, endColumn
+
+    if (line && typeof line === 'object') {
+      let start = line
+      let end = column
+      if (typeof start.offset === 'number') {
+        let pos = this.fromOffset(start.offset)
+        line = pos.line
+        column = pos.col
+      } else {
+        line = start.line
+        column = start.column
+      }
+      if (typeof end.offset === 'number') {
+        let pos = this.fromOffset(end.offset)
+        endLine = pos.line
+        endColumn = pos.col
+      } else {
+        endLine = end.line
+        endColumn = end.column
+      }
+    } else if (!column) {
+      let pos = this.fromOffset(line)
+      line = pos.line
+      column = pos.col
+    }
+
+    let origin = this.origin(line, column, endLine, endColumn)
+    if (origin) {
+      result = new CssSyntaxError(
+        message,
+        origin.endLine === undefined
+          ? origin.line
+          : { column: origin.column, line: origin.line },
+        origin.endLine === undefined
+          ? origin.column
+          : { column: origin.endColumn, line: origin.endLine },
+        origin.source,
+        origin.file,
+        opts.plugin
+      )
+    } else {
+      result = new CssSyntaxError(
+        message,
+        endLine === undefined ? line : { column, line },
+        endLine === undefined ? column : { column: endColumn, line: endLine },
+        this.css,
+        this.file,
+        opts.plugin
+      )
+    }
+
+    result.input = { column, endColumn, endLine, line, source: this.css }
+    if (this.file) {
+      if (pathToFileURL) {
+        result.input.url = pathToFileURL(this.file).toString()
+      }
+      result.input.file = this.file
+    }
+
+    return result
+  }
+
+  fromOffset(offset) {
+    let lastLine, lineToIndex
+    if (!this[fromOffsetCache]) {
+      let lines = this.css.split('\n')
+      lineToIndex = new Array(lines.length)
+      let prevIndex = 0
+
+      for (let i = 0, l = lines.length; i < l; i++) {
+        lineToIndex[i] = prevIndex
+        prevIndex += lines[i].length + 1
+      }
+
+      this[fromOffsetCache] = lineToIndex
+    } else {
+      lineToIndex = this[fromOffsetCache]
+    }
+    lastLine = lineToIndex[lineToIndex.length - 1]
+
+    let min = 0
+    if (offset >= lastLine) {
+      min = lineToIndex.length - 1
+    } else {
+      let max = lineToIndex.length - 2
+      let mid
+      while (min < max) {
+        mid = min + ((max - min) >> 1)
+        if (offset < lineToIndex[mid]) {
+          max = mid - 1
+        } else if (offset >= lineToIndex[mid + 1]) {
+          min = mid + 1
+        } else {
+          min = mid
+          break
+        }
+      }
+    }
+    return {
+      col: offset - lineToIndex[min] + 1,
+      line: min + 1
+    }
+  }
+
+  mapResolve(file) {
+    if (/^\w+:\/\//.test(file)) {
+      return file
+    }
+    return resolve(this.map.consumer().sourceRoot || this.map.root || '.', file)
+  }
+
+  origin(line, column, endLine, endColumn) {
+    if (!this.map) return false
+    let consumer = this.map.consumer()
+
+    let from = consumer.originalPositionFor({ column, line })
+    if (!from.source) return false
+
+    let to
+    if (typeof endLine === 'number') {
+      to = consumer.originalPositionFor({ column: endColumn, line: endLine })
+    }
+
+    let fromUrl
+
+    if (isAbsolute(from.source)) {
+      fromUrl = pathToFileURL(from.source)
+    } else {
+      fromUrl = new URL(
+        from.source,
+        this.map.consumer().sourceRoot || pathToFileURL(this.map.mapFile)
+      )
+    }
+
+    let result = {
+      column: from.column,
+      endColumn: to && to.column,
+      endLine: to && to.line,
+      line: from.line,
+      url: fromUrl.toString()
+    }
+
+    if (fromUrl.protocol === 'file:') {
+      if (fileURLToPath) {
+        result.file = fileURLToPath(fromUrl)
+      } else {
+        /* c8 ignore next 2 */
+        throw new Error(`file: protocol is not available in this PostCSS build`)
+      }
+    }
+
+    let source = consumer.sourceContentFor(from.source)
+    if (source) result.source = source
+
+    return result
+  }
+
+  toJSON() {
+    let json = {}
+    for (let name of ['hasBOM', 'css', 'file', 'id']) {
+      if (this[name] != null) {
+        json[name] = this[name]
+      }
+    }
+    if (this.map) {
+      json.map = { ...this.map }
+      if (json.map.consumerCache) {
+        json.map.consumerCache = undefined
+      }
+    }
+    return json
+  }
+
+  get from() {
+    return this.file || this.id
+  }
+}
+
+module.exports = Input
+Input.default = Input
+
+if (terminalHighlight && terminalHighlight.registerInput) {
+  terminalHighlight.registerInput(Input)
+}

node_modules/postcss/lib/lazy-result.js

@@ -0,0 +1,550 @@
+'use strict'
+
+let { isClean, my } = require('./symbols')
+let MapGenerator = require('./map-generator')
+let stringify = require('./stringify')
+let Container = require('./container')
+let Document = require('./document')
+let warnOnce = require('./warn-once')
+let Result = require('./result')
+let parse = require('./parse')
+let Root = require('./root')
+
+const TYPE_TO_CLASS_NAME = {
+  atrule: 'AtRule',
+  comment: 'Comment',
+  decl: 'Declaration',
+  document: 'Document',
+  root: 'Root',
+  rule: 'Rule'
+}
+
+const PLUGIN_PROPS = {
+  AtRule: true,
+  AtRuleExit: true,
+  Comment: true,
+  CommentExit: true,
+  Declaration: true,
+  DeclarationExit: true,
+  Document: true,
+  DocumentExit: true,
+  Once: true,
+  OnceExit: true,
+  postcssPlugin: true,
+  prepare: true,
+  Root: true,
+  RootExit: true,
+  Rule: true,
+  RuleExit: true
+}
+
+const NOT_VISITORS = {
+  Once: true,
+  postcssPlugin: true,
+  prepare: true
+}
+
+const CHILDREN = 0
+
+function isPromise(obj) {
+  return typeof obj === 'object' && typeof obj.then === 'function'
+}
+
+function getEvents(node) {
+  let key = false
+  let type = TYPE_TO_CLASS_NAME[node.type]
+  if (node.type === 'decl') {
+    key = node.prop.toLowerCase()
+  } else if (node.type === 'atrule') {
+    key = node.name.toLowerCase()
+  }
+
+  if (key && node.append) {
+    return [
+      type,
+      type + '-' + key,
+      CHILDREN,
+      type + 'Exit',
+      type + 'Exit-' + key
+    ]
+  } else if (key) {
+    return [type, type + '-' + key, type + 'Exit', type + 'Exit-' + key]
+  } else if (node.append) {
+    return [type, CHILDREN, type + 'Exit']
+  } else {
+    return [type, type + 'Exit']
+  }
+}
+
+function toStack(node) {
+  let events
+  if (node.type === 'document') {
+    events = ['Document', CHILDREN, 'DocumentExit']
+  } else if (node.type === 'root') {
+    events = ['Root', CHILDREN, 'RootExit']
+  } else {
+    events = getEvents(node)
+  }
+
+  return {
+    eventIndex: 0,
+    events,
+    iterator: 0,
+    node,
+    visitorIndex: 0,
+    visitors: []
+  }
+}
+
+function cleanMarks(node) {
+  node[isClean] = false
+  if (node.nodes) node.nodes.forEach(i => cleanMarks(i))
+  return node
+}
+
+let postcss = {}
+
+class LazyResult {
+  constructor(processor, css, opts) {
+    this.stringified = false
+    this.processed = false
+
+    let root
+    if (
+      typeof css === 'object' &&
+      css !== null &&
+      (css.type === 'root' || css.type === 'document')
+    ) {
+      root = cleanMarks(css)
+    } else if (css instanceof LazyResult || css instanceof Result) {
+      root = cleanMarks(css.root)
+      if (css.map) {
+        if (typeof opts.map === 'undefined') opts.map = {}
+        if (!opts.map.inline) opts.map.inline = false
+        opts.map.prev = css.map
+      }
+    } else {
+      let parser = parse
+      if (opts.syntax) parser = opts.syntax.parse
+      if (opts.parser) parser = opts.parser
+      if (parser.parse) parser = parser.parse
+
+      try {
+        root = parser(css, opts)
+      } catch (error) {
+        this.processed = true
+        this.error = error
+      }
+
+      if (root && !root[my]) {
+        /* c8 ignore next 2 */
+        Container.rebuild(root)
+      }
+    }
+
+    this.result = new Result(processor, root, opts)
+    this.helpers = { ...postcss, postcss, result: this.result }
+    this.plugins = this.processor.plugins.map(plugin => {
+      if (typeof plugin === 'object' && plugin.prepare) {
+        return { ...plugin, ...plugin.prepare(this.result) }
+      } else {
+        return plugin
+      }
+    })
+  }
+
+  async() {
+    if (this.error) return Promise.reject(this.error)
+    if (this.processed) return Promise.resolve(this.result)
+    if (!this.processing) {
+      this.processing = this.runAsync()
+    }
+    return this.processing
+  }
+
+  catch(onRejected) {
+    return this.async().catch(onRejected)
+  }
+
+  finally(onFinally) {
+    return this.async().then(onFinally, onFinally)
+  }
+
+  getAsyncError() {
+    throw new Error('Use process(css).then(cb) to work with async plugins')
+  }
+
+  handleError(error, node) {
+    let plugin = this.result.lastPlugin
+    try {
+      if (node) node.addToError(error)
+      this.error = error
+      if (error.name === 'CssSyntaxError' && !error.plugin) {
+        error.plugin = plugin.postcssPlugin
+        error.setMessage()
+      } else if (plugin.postcssVersion) {
+        if (process.env.NODE_ENV !== 'production') {
+          let pluginName = plugin.postcssPlugin
+          let pluginVer = plugin.postcssVersion
+          let runtimeVer = this.result.processor.version
+          let a = pluginVer.split('.')
+          let b = runtimeVer.split('.')
+
+          if (a[0] !== b[0] || parseInt(a[1]) > parseInt(b[1])) {
+            // eslint-disable-next-line no-console
+            console.error(
+              'Unknown error from PostCSS plugin. Your current PostCSS ' +
+                'version is ' +
+                runtimeVer +
+                ', but ' +
+                pluginName +
+                ' uses ' +
+                pluginVer +
+                '. Perhaps this is the source of the error below.'
+            )
+          }
+        }
+      }
+    } catch (err) {
+      /* c8 ignore next 3 */
+      // eslint-disable-next-line no-console
+      if (console && console.error) console.error(err)
+    }
+    return error
+  }
+
+  prepareVisitors() {
+    this.listeners = {}
+    let add = (plugin, type, cb) => {
+      if (!this.listeners[type]) this.listeners[type] = []
+      this.listeners[type].push([plugin, cb])
+    }
+    for (let plugin of this.plugins) {
+      if (typeof plugin === 'object') {
+        for (let event in plugin) {
+          if (!PLUGIN_PROPS[event] && /^[A-Z]/.test(event)) {
+            throw new Error(
+              `Unknown event ${event} in ${plugin.postcssPlugin}. ` +
+                `Try to update PostCSS (${this.processor.version} now).`
+            )
+          }
+          if (!NOT_VISITORS[event]) {
+            if (typeof plugin[event] === 'object') {
+              for (let filter in plugin[event]) {
+                if (filter === '*') {
+                  add(plugin, event, plugin[event][filter])
+                } else {
+                  add(
+                    plugin,
+                    event + '-' + filter.toLowerCase(),
+                    plugin[event][filter]
+                  )
+                }
+              }
+            } else if (typeof plugin[event] === 'function') {
+              add(plugin, event, plugin[event])
+            }
+          }
+        }
+      }
+    }
+    this.hasListener = Object.keys(this.listeners).length > 0
+  }
+
+  async runAsync() {
+    this.plugin = 0
+    for (let i = 0; i < this.plugins.length; i++) {
+      let plugin = this.plugins[i]
+      let promise = this.runOnRoot(plugin)
+      if (isPromise(promise)) {
+        try {
+          await promise
+        } catch (error) {
+          throw this.handleError(error)
+        }
+      }
+    }
+
+    this.prepareVisitors()
+    if (this.hasListener) {
+      let root = this.result.root
+      while (!root[isClean]) {
+        root[isClean] = true
+        let stack = [toStack(root)]
+        while (stack.length > 0) {
+          let promise = this.visitTick(stack)
+          if (isPromise(promise)) {
+            try {
+              await promise
+            } catch (e) {
+              let node = stack[stack.length - 1].node
+              throw this.handleError(e, node)
+            }
+          }
+        }
+      }
+
+      if (this.listeners.OnceExit) {
+        for (let [plugin, visitor] of this.listeners.OnceExit) {
+          this.result.lastPlugin = plugin
+          try {
+            if (root.type === 'document') {
+              let roots = root.nodes.map(subRoot =>
+                visitor(subRoot, this.helpers)
+              )
+
+              await Promise.all(roots)
+            } else {
+              await visitor(root, this.helpers)
+            }
+          } catch (e) {
+            throw this.handleError(e)
+          }
+        }
+      }
+    }
+
+    this.processed = true
+    return this.stringify()
+  }
+
+  runOnRoot(plugin) {
+    this.result.lastPlugin = plugin
+    try {
+      if (typeof plugin === 'object' && plugin.Once) {
+        if (this.result.root.type === 'document') {
+          let roots = this.result.root.nodes.map(root =>
+            plugin.Once(root, this.helpers)
+          )
+
+          if (isPromise(roots[0])) {
+            return Promise.all(roots)
+          }
+
+          return roots
+        }
+
+        return plugin.Once(this.result.root, this.helpers)
+      } else if (typeof plugin === 'function') {
+        return plugin(this.result.root, this.result)
+      }
+    } catch (error) {
+      throw this.handleError(error)
+    }
+  }
+
+  stringify() {
+    if (this.error) throw this.error
+    if (this.stringified) return this.result
+    this.stringified = true
+
+    this.sync()
+
+    let opts = this.result.opts
+    let str = stringify
+    if (opts.syntax) str = opts.syntax.stringify
+    if (opts.stringifier) str = opts.stringifier
+    if (str.stringify) str = str.stringify
+
+    let map = new MapGenerator(str, this.result.root, this.result.opts)
+    let data = map.generate()
+    this.result.css = data[0]
+    this.result.map = data[1]
+
+    return this.result
+  }
+
+  sync() {
+    if (this.error) throw this.error
+    if (this.processed) return this.result
+    this.processed = true
+
+    if (this.processing) {
+      throw this.getAsyncError()
+    }
+
+    for (let plugin of this.plugins) {
+      let promise = this.runOnRoot(plugin)
+      if (isPromise(promise)) {
+        throw this.getAsyncError()
+      }
+    }
+
+    this.prepareVisitors()
+    if (this.hasListener) {
+      let root = this.result.root
+      while (!root[isClean]) {
+        root[isClean] = true
+        this.walkSync(root)
+      }
+      if (this.listeners.OnceExit) {
+        if (root.type === 'document') {
+          for (let subRoot of root.nodes) {
+            this.visitSync(this.listeners.OnceExit, subRoot)
+          }
+        } else {
+          this.visitSync(this.listeners.OnceExit, root)
+        }
+      }
+    }
+
+    return this.result
+  }
+
+  then(onFulfilled, onRejected) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (!('from' in this.opts)) {
+        warnOnce(
+          'Without `from` option PostCSS could generate wrong source map ' +
+            'and will not find Browserslist config. Set it to CSS file path ' +
+            'or to `undefined` to prevent this warning.'
+        )
+      }
+    }
+    return this.async().then(onFulfilled, onRejected)
+  }
+
+  toString() {
+    return this.css
+  }
+
+  visitSync(visitors, node) {
+    for (let [plugin, visitor] of visitors) {
+      this.result.lastPlugin = plugin
+      let promise
+      try {
+        promise = visitor(node, this.helpers)
+      } catch (e) {
+        throw this.handleError(e, node.proxyOf)
+      }
+      if (node.type !== 'root' && node.type !== 'document' && !node.parent) {
+        return true
+      }
+      if (isPromise(promise)) {
+        throw this.getAsyncError()
+      }
+    }
+  }
+
+  visitTick(stack) {
+    let visit = stack[stack.length - 1]
+    let { node, visitors } = visit
+
+    if (node.type !== 'root' && node.type !== 'document' && !node.parent) {
+      stack.pop()
+      return
+    }
+
+    if (visitors.length > 0 && visit.visitorIndex < visitors.length) {
+      let [plugin, visitor] = visitors[visit.visitorIndex]
+      visit.visitorIndex += 1
+      if (visit.visitorIndex === visitors.length) {
+        visit.visitors = []
+        visit.visitorIndex = 0
+      }
+      this.result.lastPlugin = plugin
+      try {
+        return visitor(node.toProxy(), this.helpers)
+      } catch (e) {
+        throw this.handleError(e, node)
+      }
+    }
+
+    if (visit.iterator !== 0) {
+      let iterator = visit.iterator
+      let child
+      while ((child = node.nodes[node.indexes[iterator]])) {
+        node.indexes[iterator] += 1
+        if (!child[isClean]) {
+          child[isClean] = true
+          stack.push(toStack(child))
+          return
+        }
+      }
+      visit.iterator = 0
+      delete node.indexes[iterator]
+    }
+
+    let events = visit.events
+    while (visit.eventIndex < events.length) {
+      let event = events[visit.eventIndex]
+      visit.eventIndex += 1
+      if (event === CHILDREN) {
+        if (node.nodes && node.nodes.length) {
+          node[isClean] = true
+          visit.iterator = node.getIterator()
+        }
+        return
+      } else if (this.listeners[event]) {
+        visit.visitors = this.listeners[event]
+        return
+      }
+    }
+    stack.pop()
+  }
+
+  walkSync(node) {
+    node[isClean] = true
+    let events = getEvents(node)
+    for (let event of events) {
+      if (event === CHILDREN) {
+        if (node.nodes) {
+          node.each(child => {
+            if (!child[isClean]) this.walkSync(child)
+          })
+        }
+      } else {
+        let visitors = this.listeners[event]
+        if (visitors) {
+          if (this.visitSync(visitors, node.toProxy())) return
+        }
+      }
+    }
+  }
+
+  warnings() {
+    return this.sync().warnings()
+  }
+
+  get content() {
+    return this.stringify().content
+  }
+
+  get css() {
+    return this.stringify().css
+  }
+
+  get map() {
+    return this.stringify().map
+  }
+
+  get messages() {
+    return this.sync().messages
+  }
+
+  get opts() {
+    return this.result.opts
+  }
+
+  get processor() {
+    return this.result.processor
+  }
+
+  get root() {
+    return this.sync().root
+  }
+
+  get [Symbol.toStringTag]() {
+    return 'LazyResult'
+  }
+}
+
+LazyResult.registerPostcss = dependant => {
+  postcss = dependant
+}
+
+module.exports = LazyResult
+LazyResult.default = LazyResult
+
+Root.registerLazyResult(LazyResult)
+Document.registerLazyResult(LazyResult)

node_modules/postcss/lib/list.js

@@ -0,0 +1,58 @@
+'use strict'
+
+let list = {
+  comma(string) {
+    return list.split(string, [','], true)
+  },
+
+  space(string) {
+    let spaces = [' ', '\n', '\t']
+    return list.split(string, spaces)
+  },
+
+  split(string, separators, last) {
+    let array = []
+    let current = ''
+    let split = false
+
+    let func = 0
+    let inQuote = false
+    let prevQuote = ''
+    let escape = false
+
+    for (let letter of string) {
+      if (escape) {
+        escape = false
+      } else if (letter === '\\') {
+        escape = true
+      } else if (inQuote) {
+        if (letter === prevQuote) {
+          inQuote = false
+        }
+      } else if (letter === '"' || letter === "'") {
+        inQuote = true
+        prevQuote = letter
+      } else if (letter === '(') {
+        func += 1
+      } else if (letter === ')') {
+        if (func > 0) func -= 1
+      } else if (func === 0) {
+        if (separators.includes(letter)) split = true
+      }
+
+      if (split) {
+        if (current !== '') array.push(current.trim())
+        current = ''
+        split = false
+      } else {
+        current += letter
+      }
+    }
+
+    if (last || current !== '') array.push(current.trim())
+    return array
+  }
+}
+
+module.exports = list
+list.default = list

node_modules/postcss/lib/map-generator.js

@@ -0,0 +1,368 @@
+'use strict'
+
+let { SourceMapConsumer, SourceMapGenerator } = require('source-map-js')
+let { dirname, relative, resolve, sep } = require('path')
+let { pathToFileURL } = require('url')
+
+let Input = require('./input')
+
+let sourceMapAvailable = Boolean(SourceMapConsumer && SourceMapGenerator)
+let pathAvailable = Boolean(dirname && resolve && relative && sep)
+
+class MapGenerator {
+  constructor(stringify, root, opts, cssString) {
+    this.stringify = stringify
+    this.mapOpts = opts.map || {}
+    this.root = root
+    this.opts = opts
+    this.css = cssString
+    this.originalCSS = cssString
+    this.usesFileUrls = !this.mapOpts.from && this.mapOpts.absolute
+
+    this.memoizedFileURLs = new Map()
+    this.memoizedPaths = new Map()
+    this.memoizedURLs = new Map()
+  }
+
+  addAnnotation() {
+    let content
+
+    if (this.isInline()) {
+      content =
+        'data:application/json;base64,' + this.toBase64(this.map.toString())
+    } else if (typeof this.mapOpts.annotation === 'string') {
+      content = this.mapOpts.annotation
+    } else if (typeof this.mapOpts.annotation === 'function') {
+      content = this.mapOpts.annotation(this.opts.to, this.root)
+    } else {
+      content = this.outputFile() + '.map'
+    }
+    let eol = '\n'
+    if (this.css.includes('\r\n')) eol = '\r\n'
+
+    this.css += eol + '/*# sourceMappingURL=' + content + ' */'
+  }
+
+  applyPrevMaps() {
+    for (let prev of this.previous()) {
+      let from = this.toUrl(this.path(prev.file))
+      let root = prev.root || dirname(prev.file)
+      let map
+
+      if (this.mapOpts.sourcesContent === false) {
+        map = new SourceMapConsumer(prev.text)
+        if (map.sourcesContent) {
+          map.sourcesContent = null
+        }
+      } else {
+        map = prev.consumer()
+      }
+
+      this.map.applySourceMap(map, from, this.toUrl(this.path(root)))
+    }
+  }
+
+  clearAnnotation() {
+    if (this.mapOpts.annotation === false) return
+
+    if (this.root) {
+      let node
+      for (let i = this.root.nodes.length - 1; i >= 0; i--) {
+        node = this.root.nodes[i]
+        if (node.type !== 'comment') continue
+        if (node.text.indexOf('# sourceMappingURL=') === 0) {
+          this.root.removeChild(i)
+        }
+      }
+    } else if (this.css) {
+      this.css = this.css.replace(/\n*\/\*#[\S\s]*?\*\/$/gm, '')
+    }
+  }
+
+  generate() {
+    this.clearAnnotation()
+    if (pathAvailable && sourceMapAvailable && this.isMap()) {
+      return this.generateMap()
+    } else {
+      let result = ''
+      this.stringify(this.root, i => {
+        result += i
+      })
+      return [result]
+    }
+  }
+
+  generateMap() {
+    if (this.root) {
+      this.generateString()
+    } else if (this.previous().length === 1) {
+      let prev = this.previous()[0].consumer()
+      prev.file = this.outputFile()
+      this.map = SourceMapGenerator.fromSourceMap(prev, {
+        ignoreInvalidMapping: true
+      })
+    } else {
+      this.map = new SourceMapGenerator({
+        file: this.outputFile(),
+        ignoreInvalidMapping: true
+      })
+      this.map.addMapping({
+        generated: { column: 0, line: 1 },
+        original: { column: 0, line: 1 },
+        source: this.opts.from
+          ? this.toUrl(this.path(this.opts.from))
+          : '<no source>'
+      })
+    }
+
+    if (this.isSourcesContent()) this.setSourcesContent()
+    if (this.root && this.previous().length > 0) this.applyPrevMaps()
+    if (this.isAnnotation()) this.addAnnotation()
+
+    if (this.isInline()) {
+      return [this.css]
+    } else {
+      return [this.css, this.map]
+    }
+  }
+
+  generateString() {
+    this.css = ''
+    this.map = new SourceMapGenerator({
+      file: this.outputFile(),
+      ignoreInvalidMapping: true
+    })
+
+    let line = 1
+    let column = 1
+
+    let noSource = '<no source>'
+    let mapping = {
+      generated: { column: 0, line: 0 },
+      original: { column: 0, line: 0 },
+      source: ''
+    }
+
+    let lines, last
+    this.stringify(this.root, (str, node, type) => {
+      this.css += str
+
+      if (node && type !== 'end') {
+        mapping.generated.line = line
+        mapping.generated.column = column - 1
+        if (node.source && node.source.start) {
+          mapping.source = this.sourcePath(node)
+          mapping.original.line = node.source.start.line
+          mapping.original.column = node.source.start.column - 1
+          this.map.addMapping(mapping)
+        } else {
+          mapping.source = noSource
+          mapping.original.line = 1
+          mapping.original.column = 0
+          this.map.addMapping(mapping)
+        }
+      }
+
+      lines = str.match(/\n/g)
+      if (lines) {
+        line += lines.length
+        last = str.lastIndexOf('\n')
+        column = str.length - last
+      } else {
+        column += str.length
+      }
+
+      if (node && type !== 'start') {
+        let p = node.parent || { raws: {} }
+        let childless =
+          node.type === 'decl' || (node.type === 'atrule' && !node.nodes)
+        if (!childless || node !== p.last || p.raws.semicolon) {
+          if (node.source && node.source.end) {
+            mapping.source = this.sourcePath(node)
+            mapping.original.line = node.source.end.line
+            mapping.original.column = node.source.end.column - 1
+            mapping.generated.line = line
+            mapping.generated.column = column - 2
+            this.map.addMapping(mapping)
+          } else {
+            mapping.source = noSource
+            mapping.original.line = 1
+            mapping.original.column = 0
+            mapping.generated.line = line
+            mapping.generated.column = column - 1
+            this.map.addMapping(mapping)
+          }
+        }
+      }
+    })
+  }
+
+  isAnnotation() {
+    if (this.isInline()) {
+      return true
+    }
+    if (typeof this.mapOpts.annotation !== 'undefined') {
+      return this.mapOpts.annotation
+    }
+    if (this.previous().length) {
+      return this.previous().some(i => i.annotation)
+    }
+    return true
+  }
+
+  isInline() {
+    if (typeof this.mapOpts.inline !== 'undefined') {
+      return this.mapOpts.inline
+    }
+
+    let annotation = this.mapOpts.annotation
+    if (typeof annotation !== 'undefined' && annotation !== true) {
+      return false
+    }
+
+    if (this.previous().length) {
+      return this.previous().some(i => i.inline)
+    }
+    return true
+  }
+
+  isMap() {
+    if (typeof this.opts.map !== 'undefined') {
+      return !!this.opts.map
+    }
+    return this.previous().length > 0
+  }
+
+  isSourcesContent() {
+    if (typeof this.mapOpts.sourcesContent !== 'undefined') {
+      return this.mapOpts.sourcesContent
+    }
+    if (this.previous().length) {
+      return this.previous().some(i => i.withContent())
+    }
+    return true
+  }
+
+  outputFile() {
+    if (this.opts.to) {
+      return this.path(this.opts.to)
+    } else if (this.opts.from) {
+      return this.path(this.opts.from)
+    } else {
+      return 'to.css'
+    }
+  }
+
+  path(file) {
+    if (this.mapOpts.absolute) return file
+    if (file.charCodeAt(0) === 60 /* `<` */) return file
+    if (/^\w+:\/\//.test(file)) return file
+    let cached = this.memoizedPaths.get(file)
+    if (cached) return cached
+
+    let from = this.opts.to ? dirname(this.opts.to) : '.'
+
+    if (typeof this.mapOpts.annotation === 'string') {
+      from = dirname(resolve(from, this.mapOpts.annotation))
+    }
+
+    let path = relative(from, file)
+    this.memoizedPaths.set(file, path)
+
+    return path
+  }
+
+  previous() {
+    if (!this.previousMaps) {
+      this.previousMaps = []
+      if (this.root) {
+        this.root.walk(node => {
+          if (node.source && node.source.input.map) {
+            let map = node.source.input.map
+            if (!this.previousMaps.includes(map)) {
+              this.previousMaps.push(map)
+            }
+          }
+        })
+      } else {
+        let input = new Input(this.originalCSS, this.opts)
+        if (input.map) this.previousMaps.push(input.map)
+      }
+    }
+
+    return this.previousMaps
+  }
+
+  setSourcesContent() {
+    let already = {}
+    if (this.root) {
+      this.root.walk(node => {
+        if (node.source) {
+          let from = node.source.input.from
+          if (from && !already[from]) {
+            already[from] = true
+            let fromUrl = this.usesFileUrls
+              ? this.toFileUrl(from)
+              : this.toUrl(this.path(from))
+            this.map.setSourceContent(fromUrl, node.source.input.css)
+          }
+        }
+      })
+    } else if (this.css) {
+      let from = this.opts.from
+        ? this.toUrl(this.path(this.opts.from))
+        : '<no source>'
+      this.map.setSourceContent(from, this.css)
+    }
+  }
+
+  sourcePath(node) {
+    if (this.mapOpts.from) {
+      return this.toUrl(this.mapOpts.from)
+    } else if (this.usesFileUrls) {
+      return this.toFileUrl(node.source.input.from)
+    } else {
+      return this.toUrl(this.path(node.source.input.from))
+    }
+  }
+
+  toBase64(str) {
+    if (Buffer) {
+      return Buffer.from(str).toString('base64')
+    } else {
+      return window.btoa(unescape(encodeURIComponent(str)))
+    }
+  }
+
+  toFileUrl(path) {
+    let cached = this.memoizedFileURLs.get(path)
+    if (cached) return cached
+
+    if (pathToFileURL) {
+      let fileURL = pathToFileURL(path).toString()
+      this.memoizedFileURLs.set(path, fileURL)
+
+      return fileURL
+    } else {
+      throw new Error(
+        '`map.absolute` option is not available in this PostCSS build'
+      )
+    }
+  }
+
+  toUrl(path) {
+    let cached = this.memoizedURLs.get(path)
+    if (cached) return cached
+
+    if (sep === '\\') {
+      path = path.replace(/\\/g, '/')
+    }
+
+    let url = encodeURI(path).replace(/[#?]/g, encodeURIComponent)
+    this.memoizedURLs.set(path, url)
+
+    return url
+  }
+}
+
+module.exports = MapGenerator

node_modules/postcss/lib/node.js

@@ -0,0 +1,381 @@
+'use strict'
+
+let { isClean, my } = require('./symbols')
+let CssSyntaxError = require('./css-syntax-error')
+let Stringifier = require('./stringifier')
+let stringify = require('./stringify')
+
+function cloneNode(obj, parent) {
+  let cloned = new obj.constructor()
+
+  for (let i in obj) {
+    if (!Object.prototype.hasOwnProperty.call(obj, i)) {
+      /* c8 ignore next 2 */
+      continue
+    }
+    if (i === 'proxyCache') continue
+    let value = obj[i]
+    let type = typeof value
+
+    if (i === 'parent' && type === 'object') {
+      if (parent) cloned[i] = parent
+    } else if (i === 'source') {
+      cloned[i] = value
+    } else if (Array.isArray(value)) {
+      cloned[i] = value.map(j => cloneNode(j, cloned))
+    } else {
+      if (type === 'object' && value !== null) value = cloneNode(value)
+      cloned[i] = value
+    }
+  }
+
+  return cloned
+}
+
+class Node {
+  constructor(defaults = {}) {
+    this.raws = {}
+    this[isClean] = false
+    this[my] = true
+
+    for (let name in defaults) {
+      if (name === 'nodes') {
+        this.nodes = []
+        for (let node of defaults[name]) {
+          if (typeof node.clone === 'function') {
+            this.append(node.clone())
+          } else {
+            this.append(node)
+          }
+        }
+      } else {
+        this[name] = defaults[name]
+      }
+    }
+  }
+
+  addToError(error) {
+    error.postcssNode = this
+    if (error.stack && this.source && /\n\s{4}at /.test(error.stack)) {
+      let s = this.source
+      error.stack = error.stack.replace(
+        /\n\s{4}at /,
+        `$&${s.input.from}:${s.start.line}:${s.start.column}$&`
+      )
+    }
+    return error
+  }
+
+  after(add) {
+    this.parent.insertAfter(this, add)
+    return this
+  }
+
+  assign(overrides = {}) {
+    for (let name in overrides) {
+      this[name] = overrides[name]
+    }
+    return this
+  }
+
+  before(add) {
+    this.parent.insertBefore(this, add)
+    return this
+  }
+
+  cleanRaws(keepBetween) {
+    delete this.raws.before
+    delete this.raws.after
+    if (!keepBetween) delete this.raws.between
+  }
+
+  clone(overrides = {}) {
+    let cloned = cloneNode(this)
+    for (let name in overrides) {
+      cloned[name] = overrides[name]
+    }
+    return cloned
+  }
+
+  cloneAfter(overrides = {}) {
+    let cloned = this.clone(overrides)
+    this.parent.insertAfter(this, cloned)
+    return cloned
+  }
+
+  cloneBefore(overrides = {}) {
+    let cloned = this.clone(overrides)
+    this.parent.insertBefore(this, cloned)
+    return cloned
+  }
+
+  error(message, opts = {}) {
+    if (this.source) {
+      let { end, start } = this.rangeBy(opts)
+      return this.source.input.error(
+        message,
+        { column: start.column, line: start.line },
+        { column: end.column, line: end.line },
+        opts
+      )
+    }
+    return new CssSyntaxError(message)
+  }
+
+  getProxyProcessor() {
+    return {
+      get(node, prop) {
+        if (prop === 'proxyOf') {
+          return node
+        } else if (prop === 'root') {
+          return () => node.root().toProxy()
+        } else {
+          return node[prop]
+        }
+      },
+
+      set(node, prop, value) {
+        if (node[prop] === value) return true
+        node[prop] = value
+        if (
+          prop === 'prop' ||
+          prop === 'value' ||
+          prop === 'name' ||
+          prop === 'params' ||
+          prop === 'important' ||
+          /* c8 ignore next */
+          prop === 'text'
+        ) {
+          node.markDirty()
+        }
+        return true
+      }
+    }
+  }
+
+  markDirty() {
+    if (this[isClean]) {
+      this[isClean] = false
+      let next = this
+      while ((next = next.parent)) {
+        next[isClean] = false
+      }
+    }
+  }
+
+  next() {
+    if (!this.parent) return undefined
+    let index = this.parent.index(this)
+    return this.parent.nodes[index + 1]
+  }
+
+  positionBy(opts, stringRepresentation) {
+    let pos = this.source.start
+    if (opts.index) {
+      pos = this.positionInside(opts.index, stringRepresentation)
+    } else if (opts.word) {
+      stringRepresentation = this.toString()
+      let index = stringRepresentation.indexOf(opts.word)
+      if (index !== -1) pos = this.positionInside(index, stringRepresentation)
+    }
+    return pos
+  }
+
+  positionInside(index, stringRepresentation) {
+    let string = stringRepresentation || this.toString()
+    let column = this.source.start.column
+    let line = this.source.start.line
+
+    for (let i = 0; i < index; i++) {
+      if (string[i] === '\n') {
+        column = 1
+        line += 1
+      } else {
+        column += 1
+      }
+    }
+
+    return { column, line }
+  }
+
+  prev() {
+    if (!this.parent) return undefined
+    let index = this.parent.index(this)
+    return this.parent.nodes[index - 1]
+  }
+
+  rangeBy(opts) {
+    let start = {
+      column: this.source.start.column,
+      line: this.source.start.line
+    }
+    let end = this.source.end
+      ? {
+        column: this.source.end.column + 1,
+        line: this.source.end.line
+      }
+      : {
+        column: start.column + 1,
+        line: start.line
+      }
+
+    if (opts.word) {
+      let stringRepresentation = this.toString()
+      let index = stringRepresentation.indexOf(opts.word)
+      if (index !== -1) {
+        start = this.positionInside(index, stringRepresentation)
+        end = this.positionInside(index + opts.word.length, stringRepresentation)
+      }
+    } else {
+      if (opts.start) {
+        start = {
+          column: opts.start.column,
+          line: opts.start.line
+        }
+      } else if (opts.index) {
+        start = this.positionInside(opts.index)
+      }
+
+      if (opts.end) {
+        end = {
+          column: opts.end.column,
+          line: opts.end.line
+        }
+      } else if (typeof opts.endIndex === 'number') {
+        end = this.positionInside(opts.endIndex)
+      } else if (opts.index) {
+        end = this.positionInside(opts.index + 1)
+      }
+    }
+
+    if (
+      end.line < start.line ||
+      (end.line === start.line && end.column <= start.column)
+    ) {
+      end = { column: start.column + 1, line: start.line }
+    }
+
+    return { end, start }
+  }
+
+  raw(prop, defaultType) {
+    let str = new Stringifier()
+    return str.raw(this, prop, defaultType)
+  }
+
+  remove() {
+    if (this.parent) {
+      this.parent.removeChild(this)
+    }
+    this.parent = undefined
+    return this
+  }
+
+  replaceWith(...nodes) {
+    if (this.parent) {
+      let bookmark = this
+      let foundSelf = false
+      for (let node of nodes) {
+        if (node === this) {
+          foundSelf = true
+        } else if (foundSelf) {
+          this.parent.insertAfter(bookmark, node)
+          bookmark = node
+        } else {
+          this.parent.insertBefore(bookmark, node)
+        }
+      }
+
+      if (!foundSelf) {
+        this.remove()
+      }
+    }
+
+    return this
+  }
+
+  root() {
+    let result = this
+    while (result.parent && result.parent.type !== 'document') {
+      result = result.parent
+    }
+    return result
+  }
+
+  toJSON(_, inputs) {
+    let fixed = {}
+    let emitInputs = inputs == null
+    inputs = inputs || new Map()
+    let inputsNextIndex = 0
+
+    for (let name in this) {
+      if (!Object.prototype.hasOwnProperty.call(this, name)) {
+        /* c8 ignore next 2 */
+        continue
+      }
+      if (name === 'parent' || name === 'proxyCache') continue
+      let value = this[name]
+
+      if (Array.isArray(value)) {
+        fixed[name] = value.map(i => {
+          if (typeof i === 'object' && i.toJSON) {
+            return i.toJSON(null, inputs)
+          } else {
+            return i
+          }
+        })
+      } else if (typeof value === 'object' && value.toJSON) {
+        fixed[name] = value.toJSON(null, inputs)
+      } else if (name === 'source') {
+        let inputId = inputs.get(value.input)
+        if (inputId == null) {
+          inputId = inputsNextIndex
+          inputs.set(value.input, inputsNextIndex)
+          inputsNextIndex++
+        }
+        fixed[name] = {
+          end: value.end,
+          inputId,
+          start: value.start
+        }
+      } else {
+        fixed[name] = value
+      }
+    }
+
+    if (emitInputs) {
+      fixed.inputs = [...inputs.keys()].map(input => input.toJSON())
+    }
+
+    return fixed
+  }
+
+  toProxy() {
+    if (!this.proxyCache) {
+      this.proxyCache = new Proxy(this, this.getProxyProcessor())
+    }
+    return this.proxyCache
+  }
+
+  toString(stringifier = stringify) {
+    if (stringifier.stringify) stringifier = stringifier.stringify
+    let result = ''
+    stringifier(this, i => {
+      result += i
+    })
+    return result
+  }
+
+  warn(result, text, opts) {
+    let data = { node: this }
+    for (let i in opts) data[i] = opts[i]
+    return result.warn(text, data)
+  }
+
+  get proxyOf() {
+    return this
+  }
+}
+
+module.exports = Node
+Node.default = Node

node_modules/postcss/lib/parse.js

@@ -0,0 +1,42 @@
+'use strict'
+
+let Container = require('./container')
+let Parser = require('./parser')
+let Input = require('./input')
+
+function parse(css, opts) {
+  let input = new Input(css, opts)
+  let parser = new Parser(input)
+  try {
+    parser.parse()
+  } catch (e) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (e.name === 'CssSyntaxError' && opts && opts.from) {
+        if (/\.scss$/i.test(opts.from)) {
+          e.message +=
+            '\nYou tried to parse SCSS with ' +
+            'the standard CSS parser; ' +
+            'try again with the postcss-scss parser'
+        } else if (/\.sass/i.test(opts.from)) {
+          e.message +=
+            '\nYou tried to parse Sass with ' +
+            'the standard CSS parser; ' +
+            'try again with the postcss-sass parser'
+        } else if (/\.less$/i.test(opts.from)) {
+          e.message +=
+            '\nYou tried to parse Less with ' +
+            'the standard CSS parser; ' +
+            'try again with the postcss-less parser'
+        }
+      }
+    }
+    throw e
+  }
+
+  return parser.root
+}
+
+module.exports = parse
+parse.default = parse
+
+Container.registerParse(parse)

node_modules/postcss/lib/parser.js

@@ -0,0 +1,609 @@
+'use strict'
+
+let Declaration = require('./declaration')
+let tokenizer = require('./tokenize')
+let Comment = require('./comment')
+let AtRule = require('./at-rule')
+let Root = require('./root')
+let Rule = require('./rule')
+
+const SAFE_COMMENT_NEIGHBOR = {
+  empty: true,
+  space: true
+}
+
+function findLastWithPosition(tokens) {
+  for (let i = tokens.length - 1; i >= 0; i--) {
+    let token = tokens[i]
+    let pos = token[3] || token[2]
+    if (pos) return pos
+  }
+}
+
+class Parser {
+  constructor(input) {
+    this.input = input
+
+    this.root = new Root()
+    this.current = this.root
+    this.spaces = ''
+    this.semicolon = false
+
+    this.createTokenizer()
+    this.root.source = { input, start: { column: 1, line: 1, offset: 0 } }
+  }
+
+  atrule(token) {
+    let node = new AtRule()
+    node.name = token[1].slice(1)
+    if (node.name === '') {
+      this.unnamedAtrule(node, token)
+    }
+    this.init(node, token[2])
+
+    let type
+    let prev
+    let shift
+    let last = false
+    let open = false
+    let params = []
+    let brackets = []
+
+    while (!this.tokenizer.endOfFile()) {
+      token = this.tokenizer.nextToken()
+      type = token[0]
+
+      if (type === '(' || type === '[') {
+        brackets.push(type === '(' ? ')' : ']')
+      } else if (type === '{' && brackets.length > 0) {
+        brackets.push('}')
+      } else if (type === brackets[brackets.length - 1]) {
+        brackets.pop()
+      }
+
+      if (brackets.length === 0) {
+        if (type === ';') {
+          node.source.end = this.getPosition(token[2])
+          node.source.end.offset++
+          this.semicolon = true
+          break
+        } else if (type === '{') {
+          open = true
+          break
+        } else if (type === '}') {
+          if (params.length > 0) {
+            shift = params.length - 1
+            prev = params[shift]
+            while (prev && prev[0] === 'space') {
+              prev = params[--shift]
+            }
+            if (prev) {
+              node.source.end = this.getPosition(prev[3] || prev[2])
+              node.source.end.offset++
+            }
+          }
+          this.end(token)
+          break
+        } else {
+          params.push(token)
+        }
+      } else {
+        params.push(token)
+      }
+
+      if (this.tokenizer.endOfFile()) {
+        last = true
+        break
+      }
+    }
+
+    node.raws.between = this.spacesAndCommentsFromEnd(params)
+    if (params.length) {
+      node.raws.afterName = this.spacesAndCommentsFromStart(params)
+      this.raw(node, 'params', params)
+      if (last) {
+        token = params[params.length - 1]
+        node.source.end = this.getPosition(token[3] || token[2])
+        node.source.end.offset++
+        this.spaces = node.raws.between
+        node.raws.between = ''
+      }
+    } else {
+      node.raws.afterName = ''
+      node.params = ''
+    }
+
+    if (open) {
+      node.nodes = []
+      this.current = node
+    }
+  }
+
+  checkMissedSemicolon(tokens) {
+    let colon = this.colon(tokens)
+    if (colon === false) return
+
+    let founded = 0
+    let token
+    for (let j = colon - 1; j >= 0; j--) {
+      token = tokens[j]
+      if (token[0] !== 'space') {
+        founded += 1
+        if (founded === 2) break
+      }
+    }
+    // If the token is a word, e.g. `!important`, `red` or any other valid property's value.
+    // Then we need to return the colon after that word token. [3] is the "end" colon of that word.
+    // And because we need it after that one we do +1 to get the next one.
+    throw this.input.error(
+      'Missed semicolon',
+      token[0] === 'word' ? token[3] + 1 : token[2]
+    )
+  }
+
+  colon(tokens) {
+    let brackets = 0
+    let token, type, prev
+    for (let [i, element] of tokens.entries()) {
+      token = element
+      type = token[0]
+
+      if (type === '(') {
+        brackets += 1
+      }
+      if (type === ')') {
+        brackets -= 1
+      }
+      if (brackets === 0 && type === ':') {
+        if (!prev) {
+          this.doubleColon(token)
+        } else if (prev[0] === 'word' && prev[1] === 'progid') {
+          continue
+        } else {
+          return i
+        }
+      }
+
+      prev = token
+    }
+    return false
+  }
+
+  comment(token) {
+    let node = new Comment()
+    this.init(node, token[2])
+    node.source.end = this.getPosition(token[3] || token[2])
+    node.source.end.offset++
+
+    let text = token[1].slice(2, -2)
+    if (/^\s*$/.test(text)) {
+      node.text = ''
+      node.raws.left = text
+      node.raws.right = ''
+    } else {
+      let match = text.match(/^(\s*)([^]*\S)(\s*)$/)
+      node.text = match[2]
+      node.raws.left = match[1]
+      node.raws.right = match[3]
+    }
+  }
+
+  createTokenizer() {
+    this.tokenizer = tokenizer(this.input)
+  }
+
+  decl(tokens, customProperty) {
+    let node = new Declaration()
+    this.init(node, tokens[0][2])
+
+    let last = tokens[tokens.length - 1]
+    if (last[0] === ';') {
+      this.semicolon = true
+      tokens.pop()
+    }
+
+    node.source.end = this.getPosition(
+      last[3] || last[2] || findLastWithPosition(tokens)
+    )
+    node.source.end.offset++
+
+    while (tokens[0][0] !== 'word') {
+      if (tokens.length === 1) this.unknownWord(tokens)
+      node.raws.before += tokens.shift()[1]
+    }
+    node.source.start = this.getPosition(tokens[0][2])
+
+    node.prop = ''
+    while (tokens.length) {
+      let type = tokens[0][0]
+      if (type === ':' || type === 'space' || type === 'comment') {
+        break
+      }
+      node.prop += tokens.shift()[1]
+    }
+
+    node.raws.between = ''
+
+    let token
+    while (tokens.length) {
+      token = tokens.shift()
+
+      if (token[0] === ':') {
+        node.raws.between += token[1]
+        break
+      } else {
+        if (token[0] === 'word' && /\w/.test(token[1])) {
+          this.unknownWord([token])
+        }
+        node.raws.between += token[1]
+      }
+    }
+
+    if (node.prop[0] === '_' || node.prop[0] === '*') {
+      node.raws.before += node.prop[0]
+      node.prop = node.prop.slice(1)
+    }
+
+    let firstSpaces = []
+    let next
+    while (tokens.length) {
+      next = tokens[0][0]
+      if (next !== 'space' && next !== 'comment') break
+      firstSpaces.push(tokens.shift())
+    }
+
+    this.precheckMissedSemicolon(tokens)
+
+    for (let i = tokens.length - 1; i >= 0; i--) {
+      token = tokens[i]
+      if (token[1].toLowerCase() === '!important') {
+        node.important = true
+        let string = this.stringFrom(tokens, i)
+        string = this.spacesFromEnd(tokens) + string
+        if (string !== ' !important') node.raws.important = string
+        break
+      } else if (token[1].toLowerCase() === 'important') {
+        let cache = tokens.slice(0)
+        let str = ''
+        for (let j = i; j > 0; j--) {
+          let type = cache[j][0]
+          if (str.trim().indexOf('!') === 0 && type !== 'space') {
+            break
+          }
+          str = cache.pop()[1] + str
+        }
+        if (str.trim().indexOf('!') === 0) {
+          node.important = true
+          node.raws.important = str
+          tokens = cache
+        }
+      }
+
+      if (token[0] !== 'space' && token[0] !== 'comment') {
+        break
+      }
+    }
+
+    let hasWord = tokens.some(i => i[0] !== 'space' && i[0] !== 'comment')
+
+    if (hasWord) {
+      node.raws.between += firstSpaces.map(i => i[1]).join('')
+      firstSpaces = []
+    }
+    this.raw(node, 'value', firstSpaces.concat(tokens), customProperty)
+
+    if (node.value.includes(':') && !customProperty) {
+      this.checkMissedSemicolon(tokens)
+    }
+  }
+
+  doubleColon(token) {
+    throw this.input.error(
+      'Double colon',
+      { offset: token[2] },
+      { offset: token[2] + token[1].length }
+    )
+  }
+
+  emptyRule(token) {
+    let node = new Rule()
+    this.init(node, token[2])
+    node.selector = ''
+    node.raws.between = ''
+    this.current = node
+  }
+
+  end(token) {
+    if (this.current.nodes && this.current.nodes.length) {
+      this.current.raws.semicolon = this.semicolon
+    }
+    this.semicolon = false
+
+    this.current.raws.after = (this.current.raws.after || '') + this.spaces
+    this.spaces = ''
+
+    if (this.current.parent) {
+      this.current.source.end = this.getPosition(token[2])
+      this.current.source.end.offset++
+      this.current = this.current.parent
+    } else {
+      this.unexpectedClose(token)
+    }
+  }
+
+  endFile() {
+    if (this.current.parent) this.unclosedBlock()
+    if (this.current.nodes && this.current.nodes.length) {
+      this.current.raws.semicolon = this.semicolon
+    }
+    this.current.raws.after = (this.current.raws.after || '') + this.spaces
+    this.root.source.end = this.getPosition(this.tokenizer.position())
+  }
+
+  freeSemicolon(token) {
+    this.spaces += token[1]
+    if (this.current.nodes) {
+      let prev = this.current.nodes[this.current.nodes.length - 1]
+      if (prev && prev.type === 'rule' && !prev.raws.ownSemicolon) {
+        prev.raws.ownSemicolon = this.spaces
+        this.spaces = ''
+      }
+    }
+  }
+
+  // Helpers
+
+  getPosition(offset) {
+    let pos = this.input.fromOffset(offset)
+    return {
+      column: pos.col,
+      line: pos.line,
+      offset
+    }
+  }
+
+  init(node, offset) {
+    this.current.push(node)
+    node.source = {
+      input: this.input,
+      start: this.getPosition(offset)
+    }
+    node.raws.before = this.spaces
+    this.spaces = ''
+    if (node.type !== 'comment') this.semicolon = false
+  }
+
+  other(start) {
+    let end = false
+    let type = null
+    let colon = false
+    let bracket = null
+    let brackets = []
+    let customProperty = start[1].startsWith('--')
+
+    let tokens = []
+    let token = start
+    while (token) {
+      type = token[0]
+      tokens.push(token)
+
+      if (type === '(' || type === '[') {
+        if (!bracket) bracket = token
+        brackets.push(type === '(' ? ')' : ']')
+      } else if (customProperty && colon && type === '{') {
+        if (!bracket) bracket = token
+        brackets.push('}')
+      } else if (brackets.length === 0) {
+        if (type === ';') {
+          if (colon) {
+            this.decl(tokens, customProperty)
+            return
+          } else {
+            break
+          }
+        } else if (type === '{') {
+          this.rule(tokens)
+          return
+        } else if (type === '}') {
+          this.tokenizer.back(tokens.pop())
+          end = true
+          break
+        } else if (type === ':') {
+          colon = true
+        }
+      } else if (type === brackets[brackets.length - 1]) {
+        brackets.pop()
+        if (brackets.length === 0) bracket = null
+      }
+
+      token = this.tokenizer.nextToken()
+    }
+
+    if (this.tokenizer.endOfFile()) end = true
+    if (brackets.length > 0) this.unclosedBracket(bracket)
+
+    if (end && colon) {
+      if (!customProperty) {
+        while (tokens.length) {
+          token = tokens[tokens.length - 1][0]
+          if (token !== 'space' && token !== 'comment') break
+          this.tokenizer.back(tokens.pop())
+        }
+      }
+      this.decl(tokens, customProperty)
+    } else {
+      this.unknownWord(tokens)
+    }
+  }
+
+  parse() {
+    let token
+    while (!this.tokenizer.endOfFile()) {
+      token = this.tokenizer.nextToken()
+
+      switch (token[0]) {
+        case 'space':
+          this.spaces += token[1]
+          break
+
+        case ';':
+          this.freeSemicolon(token)
+          break
+
+        case '}':
+          this.end(token)
+          break
+
+        case 'comment':
+          this.comment(token)
+          break
+
+        case 'at-word':
+          this.atrule(token)
+          break
+
+        case '{':
+          this.emptyRule(token)
+          break
+
+        default:
+          this.other(token)
+          break
+      }
+    }
+    this.endFile()
+  }
+
+  precheckMissedSemicolon(/* tokens */) {
+    // Hook for Safe Parser
+  }
+
+  raw(node, prop, tokens, customProperty) {
+    let token, type
+    let length = tokens.length
+    let value = ''
+    let clean = true
+    let next, prev
+
+    for (let i = 0; i < length; i += 1) {
+      token = tokens[i]
+      type = token[0]
+      if (type === 'space' && i === length - 1 && !customProperty) {
+        clean = false
+      } else if (type === 'comment') {
+        prev = tokens[i - 1] ? tokens[i - 1][0] : 'empty'
+        next = tokens[i + 1] ? tokens[i + 1][0] : 'empty'
+        if (!SAFE_COMMENT_NEIGHBOR[prev] && !SAFE_COMMENT_NEIGHBOR[next]) {
+          if (value.slice(-1) === ',') {
+            clean = false
+          } else {
+            value += token[1]
+          }
+        } else {
+          clean = false
+        }
+      } else {
+        value += token[1]
+      }
+    }
+    if (!clean) {
+      let raw = tokens.reduce((all, i) => all + i[1], '')
+      node.raws[prop] = { raw, value }
+    }
+    node[prop] = value
+  }
+
+  rule(tokens) {
+    tokens.pop()
+
+    let node = new Rule()
+    this.init(node, tokens[0][2])
+
+    node.raws.between = this.spacesAndCommentsFromEnd(tokens)
+    this.raw(node, 'selector', tokens)
+    this.current = node
+  }
+
+  spacesAndCommentsFromEnd(tokens) {
+    let lastTokenType
+    let spaces = ''
+    while (tokens.length) {
+      lastTokenType = tokens[tokens.length - 1][0]
+      if (lastTokenType !== 'space' && lastTokenType !== 'comment') break
+      spaces = tokens.pop()[1] + spaces
+    }
+    return spaces
+  }
+
+  // Errors
+
+  spacesAndCommentsFromStart(tokens) {
+    let next
+    let spaces = ''
+    while (tokens.length) {
+      next = tokens[0][0]
+      if (next !== 'space' && next !== 'comment') break
+      spaces += tokens.shift()[1]
+    }
+    return spaces
+  }
+
+  spacesFromEnd(tokens) {
+    let lastTokenType
+    let spaces = ''
+    while (tokens.length) {
+      lastTokenType = tokens[tokens.length - 1][0]
+      if (lastTokenType !== 'space') break
+      spaces = tokens.pop()[1] + spaces
+    }
+    return spaces
+  }
+
+  stringFrom(tokens, from) {
+    let result = ''
+    for (let i = from; i < tokens.length; i++) {
+      result += tokens[i][1]
+    }
+    tokens.splice(from, tokens.length - from)
+    return result
+  }
+
+  unclosedBlock() {
+    let pos = this.current.source.start
+    throw this.input.error('Unclosed block', pos.line, pos.column)
+  }
+
+  unclosedBracket(bracket) {
+    throw this.input.error(
+      'Unclosed bracket',
+      { offset: bracket[2] },
+      { offset: bracket[2] + 1 }
+    )
+  }
+
+  unexpectedClose(token) {
+    throw this.input.error(
+      'Unexpected }',
+      { offset: token[2] },
+      { offset: token[2] + 1 }
+    )
+  }
+
+  unknownWord(tokens) {
+    throw this.input.error(
+      'Unknown word',
+      { offset: tokens[0][2] },
+      { offset: tokens[0][2] + tokens[0][1].length }
+    )
+  }
+
+  unnamedAtrule(node, token) {
+    throw this.input.error(
+      'At-rule without name',
+      { offset: token[2] },
+      { offset: token[2] + token[1].length }
+    )
+  }
+}
+
+module.exports = Parser

node_modules/postcss/lib/postcss.d.ts

@@ -0,0 +1,450 @@
+import { RawSourceMap, SourceMapGenerator } from 'source-map-js'
+
+import AtRule, { AtRuleProps } from './at-rule.js'
+import Comment, { CommentProps } from './comment.js'
+import Container, { ContainerProps } from './container.js'
+import CssSyntaxError from './css-syntax-error.js'
+import Declaration, { DeclarationProps } from './declaration.js'
+import Document, { DocumentProps } from './document.js'
+import Input, { FilePosition } from './input.js'
+import LazyResult from './lazy-result.js'
+import list from './list.js'
+import Node, {
+  AnyNode,
+  ChildNode,
+  ChildProps,
+  NodeErrorOptions,
+  NodeProps,
+  Position,
+  Source
+} from './node.js'
+import Processor from './processor.js'
+import Result, { Message } from './result.js'
+import Root, { RootProps } from './root.js'
+import Rule, { RuleProps } from './rule.js'
+import Warning, { WarningOptions } from './warning.js'
+
+type DocumentProcessor = (
+  document: Document,
+  helper: postcss.Helpers
+) => Promise<void> | void
+type RootProcessor = (
+  root: Root,
+  helper: postcss.Helpers
+) => Promise<void> | void
+type DeclarationProcessor = (
+  decl: Declaration,
+  helper: postcss.Helpers
+) => Promise<void> | void
+type RuleProcessor = (
+  rule: Rule,
+  helper: postcss.Helpers
+) => Promise<void> | void
+type AtRuleProcessor = (
+  atRule: AtRule,
+  helper: postcss.Helpers
+) => Promise<void> | void
+type CommentProcessor = (
+  comment: Comment,
+  helper: postcss.Helpers
+) => Promise<void> | void
+
+interface Processors {
+  /**
+   * Will be called on all`AtRule` nodes.
+   *
+   * Will be called again on node or children changes.
+   */
+  AtRule?: { [name: string]: AtRuleProcessor } | AtRuleProcessor
+
+  /**
+   * Will be called on all `AtRule` nodes, when all children will be processed.
+   *
+   * Will be called again on node or children changes.
+   */
+  AtRuleExit?: { [name: string]: AtRuleProcessor } | AtRuleProcessor
+
+  /**
+   * Will be called on all `Comment` nodes.
+   *
+   * Will be called again on node or children changes.
+   */
+  Comment?: CommentProcessor
+
+  /**
+   * Will be called on all `Comment` nodes after listeners
+   * for `Comment` event.
+   *
+   * Will be called again on node or children changes.
+   */
+  CommentExit?: CommentProcessor
+
+  /**
+   * Will be called on all `Declaration` nodes after listeners
+   * for `Declaration` event.
+   *
+   * Will be called again on node or children changes.
+   */
+  Declaration?: { [prop: string]: DeclarationProcessor } | DeclarationProcessor
+
+  /**
+   * Will be called on all `Declaration` nodes.
+   *
+   * Will be called again on node or children changes.
+   */
+  DeclarationExit?:
+    | { [prop: string]: DeclarationProcessor }
+    | DeclarationProcessor
+
+  /**
+   * Will be called on `Document` node.
+   *
+   * Will be called again on children changes.
+   */
+  Document?: DocumentProcessor
+
+  /**
+   * Will be called on `Document` node, when all children will be processed.
+   *
+   * Will be called again on children changes.
+   */
+  DocumentExit?: DocumentProcessor
+
+  /**
+   * Will be called on `Root` node once.
+   */
+  Once?: RootProcessor
+
+  /**
+   * Will be called on `Root` node once, when all children will be processed.
+   */
+  OnceExit?: RootProcessor
+
+  /**
+   * Will be called on `Root` node.
+   *
+   * Will be called again on children changes.
+   */
+  Root?: RootProcessor
+
+  /**
+   * Will be called on `Root` node, when all children will be processed.
+   *
+   * Will be called again on children changes.
+   */
+  RootExit?: RootProcessor
+
+  /**
+   * Will be called on all `Rule` nodes.
+   *
+   * Will be called again on node or children changes.
+   */
+  Rule?: RuleProcessor
+
+  /**
+   * Will be called on all `Rule` nodes, when all children will be processed.
+   *
+   * Will be called again on node or children changes.
+   */
+  RuleExit?: RuleProcessor
+}
+
+declare namespace postcss {
+  export {
+    AnyNode,
+    AtRule,
+    AtRuleProps,
+    ChildNode,
+    ChildProps,
+    Comment,
+    CommentProps,
+    Container,
+    ContainerProps,
+    CssSyntaxError,
+    Declaration,
+    DeclarationProps,
+    Document,
+    DocumentProps,
+    FilePosition,
+    Input,
+    LazyResult,
+    list,
+    Message,
+    Node,
+    NodeErrorOptions,
+    NodeProps,
+    Position,
+    Processor,
+    Result,
+    Root,
+    RootProps,
+    Rule,
+    RuleProps,
+    Source,
+    Warning,
+    WarningOptions
+  }
+
+  export type SourceMap = {
+    toJSON(): RawSourceMap
+  } & SourceMapGenerator
+
+  export type Helpers = { postcss: Postcss; result: Result } & Postcss
+
+  export interface Plugin extends Processors {
+    postcssPlugin: string
+    prepare?: (result: Result) => Processors
+  }
+
+  export interface PluginCreator<PluginOptions> {
+    (opts?: PluginOptions): Plugin | Processor
+    postcss: true
+  }
+
+  export interface Transformer extends TransformCallback {
+    postcssPlugin: string
+    postcssVersion: string
+  }
+
+  export interface TransformCallback {
+    (root: Root, result: Result): Promise<void> | void
+  }
+
+  export interface OldPlugin<T> extends Transformer {
+    (opts?: T): Transformer
+    postcss: Transformer
+  }
+
+  export type AcceptedPlugin =
+    | {
+        postcss: Processor | TransformCallback
+      }
+    | OldPlugin<any>
+    | Plugin
+    | PluginCreator<any>
+    | Processor
+    | TransformCallback
+
+  export interface Parser<RootNode = Document | Root> {
+    (
+      css: { toString(): string } | string,
+      opts?: Pick<ProcessOptions, 'from' | 'map'>
+    ): RootNode
+  }
+
+  export interface Builder {
+    (part: string, node?: AnyNode, type?: 'end' | 'start'): void
+  }
+
+  export interface Stringifier {
+    (node: AnyNode, builder: Builder): void
+  }
+
+  export interface JSONHydrator {
+    (data: object): Node
+    (data: object[]): Node[]
+  }
+
+  export interface Syntax<RootNode = Document | Root> {
+    /**
+     * Function to generate AST by string.
+     */
+    parse?: Parser<RootNode>
+
+    /**
+     * Class to generate string by AST.
+     */
+    stringify?: Stringifier
+  }
+
+  export interface SourceMapOptions {
+    /**
+     * Use absolute path in generated source map.
+     */
+    absolute?: boolean
+
+    /**
+     * Indicates that PostCSS should add annotation comments to the CSS.
+     * By default, PostCSS will always add a comment with a path
+     * to the source map. PostCSS will not add annotations to CSS files
+     * that do not contain any comments.
+     *
+     * By default, PostCSS presumes that you want to save the source map as
+     * `opts.to + '.map'` and will use this path in the annotation comment.
+     * A different path can be set by providing a string value for annotation.
+     *
+     * If you have set `inline: true`, annotation cannot be disabled.
+     */
+    annotation?: ((file: string, root: Root) => string) | boolean | string
+
+    /**
+     * Override `from` in map’s sources.
+     */
+    from?: string
+
+    /**
+     * Indicates that the source map should be embedded in the output CSS
+     * as a Base64-encoded comment. By default, it is `true`.
+     * But if all previous maps are external, not inline, PostCSS will not embed
+     * the map even if you do not set this option.
+     *
+     * If you have an inline source map, the result.map property will be empty,
+     * as the source map will be contained within the text of `result.css`.
+     */
+    inline?: boolean
+
+    /**
+     * Source map content from a previous processing step (e.g., Sass).
+     *
+     * PostCSS will try to read the previous source map
+     * automatically (based on comments within the source CSS), but you can use
+     * this option to identify it manually.
+     *
+     * If desired, you can omit the previous map with prev: `false`.
+     */
+    prev?: ((file: string) => string) | boolean | object | string
+
+    /**
+     * Indicates that PostCSS should set the origin content (e.g., Sass source)
+     * of the source map. By default, it is true. But if all previous maps do not
+     * contain sources content, PostCSS will also leave it out even if you
+     * do not set this option.
+     */
+    sourcesContent?: boolean
+  }
+
+  export interface ProcessOptions<RootNode = Document | Root> {
+    /**
+     * The path of the CSS source file. You should always set `from`,
+     * because it is used in source map generation and syntax error messages.
+     */
+    from?: string | undefined
+
+    /**
+     * Source map options
+     */
+    map?: boolean | SourceMapOptions
+
+    /**
+     * Function to generate AST by string.
+     */
+    parser?: Parser<RootNode> | Syntax<RootNode>
+
+    /**
+     * Class to generate string by AST.
+     */
+    stringifier?: Stringifier | Syntax<RootNode>
+
+    /**
+     * Object with parse and stringify.
+     */
+    syntax?: Syntax<RootNode>
+
+    /**
+     * The path where you'll put the output CSS file. You should always set `to`
+     * to generate correct source maps.
+     */
+    to?: string
+  }
+
+  export type Postcss = typeof postcss
+
+  /**
+   * Default function to convert a node tree into a CSS string.
+   */
+  export let stringify: Stringifier
+
+  /**
+   * Parses source css and returns a new `Root` or `Document` node,
+   * which contains the source CSS nodes.
+   *
+   * ```js
+   * // Simple CSS concatenation with source map support
+   * const root1 = postcss.parse(css1, { from: file1 })
+   * const root2 = postcss.parse(css2, { from: file2 })
+   * root1.append(root2).toResult().css
+   * ```
+   */
+  export let parse: Parser<Root>
+
+  /**
+   * Rehydrate a JSON AST (from `Node#toJSON`) back into the AST classes.
+   *
+   * ```js
+   * const json = root.toJSON()
+   * // save to file, send by network, etc
+   * const root2  = postcss.fromJSON(json)
+   * ```
+   */
+  export let fromJSON: JSONHydrator
+
+  /**
+   * Creates a new `Comment` node.
+   *
+   * @param defaults Properties for the new node.
+   * @return New comment node
+   */
+  export function comment(defaults?: CommentProps): Comment
+
+  /**
+   * Creates a new `AtRule` node.
+   *
+   * @param defaults Properties for the new node.
+   * @return New at-rule node.
+   */
+  export function atRule(defaults?: AtRuleProps): AtRule
+
+  /**
+   * Creates a new `Declaration` node.
+   *
+   * @param defaults Properties for the new node.
+   * @return New declaration node.
+   */
+  export function decl(defaults?: DeclarationProps): Declaration
+
+  /**
+   * Creates a new `Rule` node.
+   *
+   * @param default Properties for the new node.
+   * @return New rule node.
+   */
+  export function rule(defaults?: RuleProps): Rule
+
+  /**
+   * Creates a new `Root` node.
+   *
+   * @param defaults Properties for the new node.
+   * @return New root node.
+   */
+  export function root(defaults?: RootProps): Root
+
+  /**
+   * Creates a new `Document` node.
+   *
+   * @param defaults Properties for the new node.
+   * @return New document node.
+   */
+  export function document(defaults?: DocumentProps): Document
+
+  export { postcss as default }
+}
+
+/**
+ * Create a new `Processor` instance that will apply `plugins`
+ * as CSS processors.
+ *
+ * ```js
+ * let postcss = require('postcss')
+ *
+ * postcss(plugins).process(css, { from, to }).then(result => {
+ *   console.log(result.css)
+ * })
+ * ```
+ *
+ * @param plugins PostCSS plugins.
+ * @return Processor to process multiple CSS.
+ */
+declare function postcss(plugins?: postcss.AcceptedPlugin[]): Processor
+declare function postcss(...plugins: postcss.AcceptedPlugin[]): Processor
+
+export = postcss

node_modules/postcss/lib/postcss.js

@@ -0,0 +1,101 @@
+'use strict'
+
+let CssSyntaxError = require('./css-syntax-error')
+let Declaration = require('./declaration')
+let LazyResult = require('./lazy-result')
+let Container = require('./container')
+let Processor = require('./processor')
+let stringify = require('./stringify')
+let fromJSON = require('./fromJSON')
+let Document = require('./document')
+let Warning = require('./warning')
+let Comment = require('./comment')
+let AtRule = require('./at-rule')
+let Result = require('./result.js')
+let Input = require('./input')
+let parse = require('./parse')
+let list = require('./list')
+let Rule = require('./rule')
+let Root = require('./root')
+let Node = require('./node')
+
+function postcss(...plugins) {
+  if (plugins.length === 1 && Array.isArray(plugins[0])) {
+    plugins = plugins[0]
+  }
+  return new Processor(plugins)
+}
+
+postcss.plugin = function plugin(name, initializer) {
+  let warningPrinted = false
+  function creator(...args) {
+    // eslint-disable-next-line no-console
+    if (console && console.warn && !warningPrinted) {
+      warningPrinted = true
+      // eslint-disable-next-line no-console
+      console.warn(
+        name +
+          ': postcss.plugin was deprecated. Migration guide:\n' +
+          'https://evilmartians.com/chronicles/postcss-8-plugin-migration'
+      )
+      if (process.env.LANG && process.env.LANG.startsWith('cn')) {
+        /* c8 ignore next 7 */
+        // eslint-disable-next-line no-console
+        console.warn(
+          name +
+            ': 里面 postcss.plugin 被弃用. 迁移指南:\n' +
+            'https://www.w3ctech.com/topic/2226'
+        )
+      }
+    }
+    let transformer = initializer(...args)
+    transformer.postcssPlugin = name
+    transformer.postcssVersion = new Processor().version
+    return transformer
+  }
+
+  let cache
+  Object.defineProperty(creator, 'postcss', {
+    get() {
+      if (!cache) cache = creator()
+      return cache
+    }
+  })
+
+  creator.process = function (css, processOpts, pluginOpts) {
+    return postcss([creator(pluginOpts)]).process(css, processOpts)
+  }
+
+  return creator
+}
+
+postcss.stringify = stringify
+postcss.parse = parse
+postcss.fromJSON = fromJSON
+postcss.list = list
+
+postcss.comment = defaults => new Comment(defaults)
+postcss.atRule = defaults => new AtRule(defaults)
+postcss.decl = defaults => new Declaration(defaults)
+postcss.rule = defaults => new Rule(defaults)
+postcss.root = defaults => new Root(defaults)
+postcss.document = defaults => new Document(defaults)
+
+postcss.CssSyntaxError = CssSyntaxError
+postcss.Declaration = Declaration
+postcss.Container = Container
+postcss.Processor = Processor
+postcss.Document = Document
+postcss.Comment = Comment
+postcss.Warning = Warning
+postcss.AtRule = AtRule
+postcss.Result = Result
+postcss.Input = Input
+postcss.Rule = Rule
+postcss.Root = Root
+postcss.Node = Node
+
+LazyResult.registerPostcss(postcss)
+
+module.exports = postcss
+postcss.default = postcss

node_modules/postcss/lib/previous-map.js

@@ -0,0 +1,144 @@
+'use strict'
+
+let { SourceMapConsumer, SourceMapGenerator } = require('source-map-js')
+let { existsSync, readFileSync } = require('fs')
+let { dirname, join } = require('path')
+
+function fromBase64(str) {
+  if (Buffer) {
+    return Buffer.from(str, 'base64').toString()
+  } else {
+    /* c8 ignore next 2 */
+    return window.atob(str)
+  }
+}
+
+class PreviousMap {
+  constructor(css, opts) {
+    if (opts.map === false) return
+    this.loadAnnotation(css)
+    this.inline = this.startWith(this.annotation, 'data:')
+
+    let prev = opts.map ? opts.map.prev : undefined
+    let text = this.loadMap(opts.from, prev)
+    if (!this.mapFile && opts.from) {
+      this.mapFile = opts.from
+    }
+    if (this.mapFile) this.root = dirname(this.mapFile)
+    if (text) this.text = text
+  }
+
+  consumer() {
+    if (!this.consumerCache) {
+      this.consumerCache = new SourceMapConsumer(this.text)
+    }
+    return this.consumerCache
+  }
+
+  decodeInline(text) {
+    let baseCharsetUri = /^data:application\/json;charset=utf-?8;base64,/
+    let baseUri = /^data:application\/json;base64,/
+    let charsetUri = /^data:application\/json;charset=utf-?8,/
+    let uri = /^data:application\/json,/
+
+    let uriMatch = text.match(charsetUri) || text.match(uri)
+    if (uriMatch) {
+      return decodeURIComponent(text.substr(uriMatch[0].length))
+    }
+
+    let baseUriMatch = text.match(baseCharsetUri) || text.match(baseUri)
+    if (baseUriMatch) {
+      return fromBase64(text.substr(baseUriMatch[0].length))
+    }
+
+    let encoding = text.match(/data:application\/json;([^,]+),/)[1]
+    throw new Error('Unsupported source map encoding ' + encoding)
+  }
+
+  getAnnotationURL(sourceMapString) {
+    return sourceMapString.replace(/^\/\*\s*# sourceMappingURL=/, '').trim()
+  }
+
+  isMap(map) {
+    if (typeof map !== 'object') return false
+    return (
+      typeof map.mappings === 'string' ||
+      typeof map._mappings === 'string' ||
+      Array.isArray(map.sections)
+    )
+  }
+
+  loadAnnotation(css) {
+    let comments = css.match(/\/\*\s*# sourceMappingURL=/g)
+    if (!comments) return
+
+    // sourceMappingURLs from comments, strings, etc.
+    let start = css.lastIndexOf(comments.pop())
+    let end = css.indexOf('*/', start)
+
+    if (start > -1 && end > -1) {
+      // Locate the last sourceMappingURL to avoid pickin
+      this.annotation = this.getAnnotationURL(css.substring(start, end))
+    }
+  }
+
+  loadFile(path) {
+    this.root = dirname(path)
+    if (existsSync(path)) {
+      this.mapFile = path
+      return readFileSync(path, 'utf-8').toString().trim()
+    }
+  }
+
+  loadMap(file, prev) {
+    if (prev === false) return false
+
+    if (prev) {
+      if (typeof prev === 'string') {
+        return prev
+      } else if (typeof prev === 'function') {
+        let prevPath = prev(file)
+        if (prevPath) {
+          let map = this.loadFile(prevPath)
+          if (!map) {
+            throw new Error(
+              'Unable to load previous source map: ' + prevPath.toString()
+            )
+          }
+          return map
+        }
+      } else if (prev instanceof SourceMapConsumer) {
+        return SourceMapGenerator.fromSourceMap(prev).toString()
+      } else if (prev instanceof SourceMapGenerator) {
+        return prev.toString()
+      } else if (this.isMap(prev)) {
+        return JSON.stringify(prev)
+      } else {
+        throw new Error(
+          'Unsupported previous source map format: ' + prev.toString()
+        )
+      }
+    } else if (this.inline) {
+      return this.decodeInline(this.annotation)
+    } else if (this.annotation) {
+      let map = this.annotation
+      if (file) map = join(dirname(file), map)
+      return this.loadFile(map)
+    }
+  }
+
+  startWith(string, start) {
+    if (!string) return false
+    return string.substr(0, start.length) === start
+  }
+
+  withContent() {
+    return !!(
+      this.consumer().sourcesContent &&
+      this.consumer().sourcesContent.length > 0
+    )
+  }
+}
+
+module.exports = PreviousMap
+PreviousMap.default = PreviousMap

node_modules/postcss/lib/processor.js

@@ -0,0 +1,67 @@
+'use strict'
+
+let NoWorkResult = require('./no-work-result')
+let LazyResult = require('./lazy-result')
+let Document = require('./document')
+let Root = require('./root')
+
+class Processor {
+  constructor(plugins = []) {
+    this.version = '8.4.41'
+    this.plugins = this.normalize(plugins)
+  }
+
+  normalize(plugins) {
+    let normalized = []
+    for (let i of plugins) {
+      if (i.postcss === true) {
+        i = i()
+      } else if (i.postcss) {
+        i = i.postcss
+      }
+
+      if (typeof i === 'object' && Array.isArray(i.plugins)) {
+        normalized = normalized.concat(i.plugins)
+      } else if (typeof i === 'object' && i.postcssPlugin) {
+        normalized.push(i)
+      } else if (typeof i === 'function') {
+        normalized.push(i)
+      } else if (typeof i === 'object' && (i.parse || i.stringify)) {
+        if (process.env.NODE_ENV !== 'production') {
+          throw new Error(
+            'PostCSS syntaxes cannot be used as plugins. Instead, please use ' +
+              'one of the syntax/parser/stringifier options as outlined ' +
+              'in your PostCSS runner documentation.'
+          )
+        }
+      } else {
+        throw new Error(i + ' is not a PostCSS plugin')
+      }
+    }
+    return normalized
+  }
+
+  process(css, opts = {}) {
+    if (
+      !this.plugins.length &&
+      !opts.parser &&
+      !opts.stringifier &&
+      !opts.syntax
+    ) {
+      return new NoWorkResult(this, css, opts)
+    } else {
+      return new LazyResult(this, css, opts)
+    }
+  }
+
+  use(plugin) {
+    this.plugins = this.plugins.concat(this.normalize([plugin]))
+    return this
+  }
+}
+
+module.exports = Processor
+Processor.default = Processor
+
+Root.registerProcessor(Processor)
+Document.registerProcessor(Processor)

node_modules/postcss/lib/result.js

@@ -0,0 +1,42 @@
+'use strict'
+
+let Warning = require('./warning')
+
+class Result {
+  constructor(processor, root, opts) {
+    this.processor = processor
+    this.messages = []
+    this.root = root
+    this.opts = opts
+    this.css = undefined
+    this.map = undefined
+  }
+
+  toString() {
+    return this.css
+  }
+
+  warn(text, opts = {}) {
+    if (!opts.plugin) {
+      if (this.lastPlugin && this.lastPlugin.postcssPlugin) {
+        opts.plugin = this.lastPlugin.postcssPlugin
+      }
+    }
+
+    let warning = new Warning(text, opts)
+    this.messages.push(warning)
+
+    return warning
+  }
+
+  warnings() {
+    return this.messages.filter(i => i.type === 'warning')
+  }
+
+  get content() {
+    return this.css
+  }
+}
+
+module.exports = Result
+Result.default = Result

node_modules/postcss/lib/root.js

@@ -0,0 +1,61 @@
+'use strict'
+
+let Container = require('./container')
+
+let LazyResult, Processor
+
+class Root extends Container {
+  constructor(defaults) {
+    super(defaults)
+    this.type = 'root'
+    if (!this.nodes) this.nodes = []
+  }
+
+  normalize(child, sample, type) {
+    let nodes = super.normalize(child)
+
+    if (sample) {
+      if (type === 'prepend') {
+        if (this.nodes.length > 1) {
+          sample.raws.before = this.nodes[1].raws.before
+        } else {
+          delete sample.raws.before
+        }
+      } else if (this.first !== sample) {
+        for (let node of nodes) {
+          node.raws.before = sample.raws.before
+        }
+      }
+    }
+
+    return nodes
+  }
+
+  removeChild(child, ignore) {
+    let index = this.index(child)
+
+    if (!ignore && index === 0 && this.nodes.length > 1) {
+      this.nodes[1].raws.before = this.nodes[index].raws.before
+    }
+
+    return super.removeChild(child)
+  }
+
+  toResult(opts = {}) {
+    let lazy = new LazyResult(new Processor(), this, opts)
+    return lazy.stringify()
+  }
+}
+
+Root.registerLazyResult = dependant => {
+  LazyResult = dependant
+}
+
+Root.registerProcessor = dependant => {
+  Processor = dependant
+}
+
+module.exports = Root
+Root.default = Root
+
+Container.registerRoot(Root)

node_modules/postcss/lib/rule.js

@@ -0,0 +1,27 @@
+'use strict'
+
+let Container = require('./container')
+let list = require('./list')
+
+class Rule extends Container {
+  constructor(defaults) {
+    super(defaults)
+    this.type = 'rule'
+    if (!this.nodes) this.nodes = []
+  }
+
+  get selectors() {
+    return list.comma(this.selector)
+  }
+
+  set selectors(values) {
+    let match = this.selector ? this.selector.match(/,\s*/) : null
+    let sep = match ? match[0] : ',' + this.raw('between', 'beforeOpen')
+    this.selector = values.join(sep)
+  }
+}
+
+module.exports = Rule
+Rule.default = Rule
+
+Container.registerRule(Rule)

node_modules/postcss/lib/stringifier.js

@@ -0,0 +1,353 @@
+'use strict'
+
+const DEFAULT_RAW = {
+  after: '\n',
+  beforeClose: '\n',
+  beforeComment: '\n',
+  beforeDecl: '\n',
+  beforeOpen: ' ',
+  beforeRule: '\n',
+  colon: ': ',
+  commentLeft: ' ',
+  commentRight: ' ',
+  emptyBody: '',
+  indent: '    ',
+  semicolon: false
+}
+
+function capitalize(str) {
+  return str[0].toUpperCase() + str.slice(1)
+}
+
+class Stringifier {
+  constructor(builder) {
+    this.builder = builder
+  }
+
+  atrule(node, semicolon) {
+    let name = '@' + node.name
+    let params = node.params ? this.rawValue(node, 'params') : ''
+
+    if (typeof node.raws.afterName !== 'undefined') {
+      name += node.raws.afterName
+    } else if (params) {
+      name += ' '
+    }
+
+    if (node.nodes) {
+      this.block(node, name + params)
+    } else {
+      let end = (node.raws.between || '') + (semicolon ? ';' : '')
+      this.builder(name + params + end, node)
+    }
+  }
+
+  beforeAfter(node, detect) {
+    let value
+    if (node.type === 'decl') {
+      value = this.raw(node, null, 'beforeDecl')
+    } else if (node.type === 'comment') {
+      value = this.raw(node, null, 'beforeComment')
+    } else if (detect === 'before') {
+      value = this.raw(node, null, 'beforeRule')
+    } else {
+      value = this.raw(node, null, 'beforeClose')
+    }
+
+    let buf = node.parent
+    let depth = 0
+    while (buf && buf.type !== 'root') {
+      depth += 1
+      buf = buf.parent
+    }
+
+    if (value.includes('\n')) {
+      let indent = this.raw(node, null, 'indent')
+      if (indent.length) {
+        for (let step = 0; step < depth; step++) value += indent
+      }
+    }
+
+    return value
+  }
+
+  block(node, start) {
+    let between = this.raw(node, 'between', 'beforeOpen')
+    this.builder(start + between + '{', node, 'start')
+
+    let after
+    if (node.nodes && node.nodes.length) {
+      this.body(node)
+      after = this.raw(node, 'after')
+    } else {
+      after = this.raw(node, 'after', 'emptyBody')
+    }
+
+    if (after) this.builder(after)
+    this.builder('}', node, 'end')
+  }
+
+  body(node) {
+    let last = node.nodes.length - 1
+    while (last > 0) {
+      if (node.nodes[last].type !== 'comment') break
+      last -= 1
+    }
+
+    let semicolon = this.raw(node, 'semicolon')
+    for (let i = 0; i < node.nodes.length; i++) {
+      let child = node.nodes[i]
+      let before = this.raw(child, 'before')
+      if (before) this.builder(before)
+      this.stringify(child, last !== i || semicolon)
+    }
+  }
+
+  comment(node) {
+    let left = this.raw(node, 'left', 'commentLeft')
+    let right = this.raw(node, 'right', 'commentRight')
+    this.builder('/*' + left + node.text + right + '*/', node)
+  }
+
+  decl(node, semicolon) {
+    let between = this.raw(node, 'between', 'colon')
+    let string = node.prop + between + this.rawValue(node, 'value')
+
+    if (node.important) {
+      string += node.raws.important || ' !important'
+    }
+
+    if (semicolon) string += ';'
+    this.builder(string, node)
+  }
+
+  document(node) {
+    this.body(node)
+  }
+
+  raw(node, own, detect) {
+    let value
+    if (!detect) detect = own
+
+    // Already had
+    if (own) {
+      value = node.raws[own]
+      if (typeof value !== 'undefined') return value
+    }
+
+    let parent = node.parent
+
+    if (detect === 'before') {
+      // Hack for first rule in CSS
+      if (!parent || (parent.type === 'root' && parent.first === node)) {
+        return ''
+      }
+
+      // `root` nodes in `document` should use only their own raws
+      if (parent && parent.type === 'document') {
+        return ''
+      }
+    }
+
+    // Floating child without parent
+    if (!parent) return DEFAULT_RAW[detect]
+
+    // Detect style by other nodes
+    let root = node.root()
+    if (!root.rawCache) root.rawCache = {}
+    if (typeof root.rawCache[detect] !== 'undefined') {
+      return root.rawCache[detect]
+    }
+
+    if (detect === 'before' || detect === 'after') {
+      return this.beforeAfter(node, detect)
+    } else {
+      let method = 'raw' + capitalize(detect)
+      if (this[method]) {
+        value = this[method](root, node)
+      } else {
+        root.walk(i => {
+          value = i.raws[own]
+          if (typeof value !== 'undefined') return false
+        })
+      }
+    }
+
+    if (typeof value === 'undefined') value = DEFAULT_RAW[detect]
+
+    root.rawCache[detect] = value
+    return value
+  }
+
+  rawBeforeClose(root) {
+    let value
+    root.walk(i => {
+      if (i.nodes && i.nodes.length > 0) {
+        if (typeof i.raws.after !== 'undefined') {
+          value = i.raws.after
+          if (value.includes('\n')) {
+            value = value.replace(/[^\n]+$/, '')
+          }
+          return false
+        }
+      }
+    })
+    if (value) value = value.replace(/\S/g, '')
+    return value
+  }
+
+  rawBeforeComment(root, node) {
+    let value
+    root.walkComments(i => {
+      if (typeof i.raws.before !== 'undefined') {
+        value = i.raws.before
+        if (value.includes('\n')) {
+          value = value.replace(/[^\n]+$/, '')
+        }
+        return false
+      }
+    })
+    if (typeof value === 'undefined') {
+      value = this.raw(node, null, 'beforeDecl')
+    } else if (value) {
+      value = value.replace(/\S/g, '')
+    }
+    return value
+  }
+
+  rawBeforeDecl(root, node) {
+    let value
+    root.walkDecls(i => {
+      if (typeof i.raws.before !== 'undefined') {
+        value = i.raws.before
+        if (value.includes('\n')) {
+          value = value.replace(/[^\n]+$/, '')
+        }
+        return false
+      }
+    })
+    if (typeof value === 'undefined') {
+      value = this.raw(node, null, 'beforeRule')
+    } else if (value) {
+      value = value.replace(/\S/g, '')
+    }
+    return value
+  }
+
+  rawBeforeOpen(root) {
+    let value
+    root.walk(i => {
+      if (i.type !== 'decl') {
+        value = i.raws.between
+        if (typeof value !== 'undefined') return false
+      }
+    })
+    return value
+  }
+
+  rawBeforeRule(root) {
+    let value
+    root.walk(i => {
+      if (i.nodes && (i.parent !== root || root.first !== i)) {
+        if (typeof i.raws.before !== 'undefined') {
+          value = i.raws.before
+          if (value.includes('\n')) {
+            value = value.replace(/[^\n]+$/, '')
+          }
+          return false
+        }
+      }
+    })
+    if (value) value = value.replace(/\S/g, '')
+    return value
+  }
+
+  rawColon(root) {
+    let value
+    root.walkDecls(i => {
+      if (typeof i.raws.between !== 'undefined') {
+        value = i.raws.between.replace(/[^\s:]/g, '')
+        return false
+      }
+    })
+    return value
+  }
+
+  rawEmptyBody(root) {
+    let value
+    root.walk(i => {
+      if (i.nodes && i.nodes.length === 0) {
+        value = i.raws.after
+        if (typeof value !== 'undefined') return false
+      }
+    })
+    return value
+  }
+
+  rawIndent(root) {
+    if (root.raws.indent) return root.raws.indent
+    let value
+    root.walk(i => {
+      let p = i.parent
+      if (p && p !== root && p.parent && p.parent === root) {
+        if (typeof i.raws.before !== 'undefined') {
+          let parts = i.raws.before.split('\n')
+          value = parts[parts.length - 1]
+          value = value.replace(/\S/g, '')
+          return false
+        }
+      }
+    })
+    return value
+  }
+
+  rawSemicolon(root) {
+    let value
+    root.walk(i => {
+      if (i.nodes && i.nodes.length && i.last.type === 'decl') {
+        value = i.raws.semicolon
+        if (typeof value !== 'undefined') return false
+      }
+    })
+    return value
+  }
+
+  rawValue(node, prop) {
+    let value = node[prop]
+    let raw = node.raws[prop]
+    if (raw && raw.value === value) {
+      return raw.raw
+    }
+
+    return value
+  }
+
+  root(node) {
+    this.body(node)
+    if (node.raws.after) this.builder(node.raws.after)
+  }
+
+  rule(node) {
+    this.block(node, this.rawValue(node, 'selector'))
+    if (node.raws.ownSemicolon) {
+      this.builder(node.raws.ownSemicolon, node, 'end')
+    }
+  }
+
+  stringify(node, semicolon) {
+    /* c8 ignore start */
+    if (!this[node.type]) {
+      throw new Error(
+        'Unknown AST node type ' +
+          node.type +
+          '. ' +
+          'Maybe you need to change PostCSS stringifier.'
+      )
+    }
+    /* c8 ignore stop */
+    this[node.type](node, semicolon)
+  }
+}
+
+module.exports = Stringifier
+Stringifier.default = Stringifier

node_modules/postcss/lib/stringify.js

@@ -0,0 +1,11 @@
+'use strict'
+
+let Stringifier = require('./stringifier')
+
+function stringify(node, builder) {
+  let str = new Stringifier(builder)
+  str.stringify(node)
+}
+
+module.exports = stringify
+stringify.default = stringify

node_modules/postcss/lib/terminal-highlight.js

@@ -0,0 +1,70 @@
+'use strict'
+
+let pico = require('picocolors')
+
+let tokenizer = require('./tokenize')
+
+let Input
+
+function registerInput(dependant) {
+  Input = dependant
+}
+
+const HIGHLIGHT_THEME = {
+  ';': pico.yellow,
+  ':': pico.yellow,
+  '(': pico.cyan,
+  ')': pico.cyan,
+  '[': pico.yellow,
+  ']': pico.yellow,
+  '{': pico.yellow,
+  '}': pico.yellow,
+  'at-word': pico.cyan,
+  'brackets': pico.cyan,
+  'call': pico.cyan,
+  'class': pico.yellow,
+  'comment': pico.gray,
+  'hash': pico.magenta,
+  'string': pico.green
+}
+
+function getTokenType([type, value], processor) {
+  if (type === 'word') {
+    if (value[0] === '.') {
+      return 'class'
+    }
+    if (value[0] === '#') {
+      return 'hash'
+    }
+  }
+
+  if (!processor.endOfFile()) {
+    let next = processor.nextToken()
+    processor.back(next)
+    if (next[0] === 'brackets' || next[0] === '(') return 'call'
+  }
+
+  return type
+}
+
+function terminalHighlight(css) {
+  let processor = tokenizer(new Input(css), { ignoreErrors: true })
+  let result = ''
+  while (!processor.endOfFile()) {
+    let token = processor.nextToken()
+    let color = HIGHLIGHT_THEME[getTokenType(token, processor)]
+    if (color) {
+      result += token[1]
+        .split(/\r?\n/)
+        .map(i => color(i))
+        .join('\n')
+    } else {
+      result += token[1]
+    }
+  }
+  return result
+}
+
+terminalHighlight.registerInput = registerInput
+
+module.exports = terminalHighlight

node_modules/postcss/lib/tokenize.js

@@ -0,0 +1,266 @@
+'use strict'
+
+const SINGLE_QUOTE = "'".charCodeAt(0)
+const DOUBLE_QUOTE = '"'.charCodeAt(0)
+const BACKSLASH = '\\'.charCodeAt(0)
+const SLASH = '/'.charCodeAt(0)
+const NEWLINE = '\n'.charCodeAt(0)
+const SPACE = ' '.charCodeAt(0)
+const FEED = '\f'.charCodeAt(0)
+const TAB = '\t'.charCodeAt(0)
+const CR = '\r'.charCodeAt(0)
+const OPEN_SQUARE = '['.charCodeAt(0)
+const CLOSE_SQUARE = ']'.charCodeAt(0)
+const OPEN_PARENTHESES = '('.charCodeAt(0)
+const CLOSE_PARENTHESES = ')'.charCodeAt(0)
+const OPEN_CURLY = '{'.charCodeAt(0)
+const CLOSE_CURLY = '}'.charCodeAt(0)
+const SEMICOLON = ';'.charCodeAt(0)
+const ASTERISK = '*'.charCodeAt(0)
+const COLON = ':'.charCodeAt(0)
+const AT = '@'.charCodeAt(0)
+
+const RE_AT_END = /[\t\n\f\r "#'()/;[\\\]{}]/g
+const RE_WORD_END = /[\t\n\f\r !"#'():;@[\\\]{}]|\/(?=\*)/g
+const RE_BAD_BRACKET = /.[\r\n"'(/\\]/
+const RE_HEX_ESCAPE = /[\da-f]/i
+
+module.exports = function tokenizer(input, options = {}) {
+  let css = input.css.valueOf()
+  let ignore = options.ignoreErrors
+
+  let code, next, quote, content, escape
+  let escaped, escapePos, prev, n, currentToken
+
+  let length = css.length
+  let pos = 0
+  let buffer = []
+  let returned = []
+
+  function position() {
+    return pos
+  }
+
+  function unclosed(what) {
+    throw input.error('Unclosed ' + what, pos)
+  }
+
+  function endOfFile() {
+    return returned.length === 0 && pos >= length
+  }
+
+  function nextToken(opts) {
+    if (returned.length) return returned.pop()
+    if (pos >= length) return
+
+    let ignoreUnclosed = opts ? opts.ignoreUnclosed : false
+
+    code = css.charCodeAt(pos)
+
+    switch (code) {
+      case NEWLINE:
+      case SPACE:
+      case TAB:
+      case CR:
+      case FEED: {
+        next = pos
+        do {
+          next += 1
+          code = css.charCodeAt(next)
+        } while (
+          code === SPACE ||
+          code === NEWLINE ||
+          code === TAB ||
+          code === CR ||
+          code === FEED
+        )
+
+        currentToken = ['space', css.slice(pos, next)]
+        pos = next - 1
+        break
+      }
+
+      case OPEN_SQUARE:
+      case CLOSE_SQUARE:
+      case OPEN_CURLY:
+      case CLOSE_CURLY:
+      case COLON:
+      case SEMICOLON:
+      case CLOSE_PARENTHESES: {
+        let controlChar = String.fromCharCode(code)
+        currentToken = [controlChar, controlChar, pos]
+        break
+      }
+
+      case OPEN_PARENTHESES: {
+        prev = buffer.length ? buffer.pop()[1] : ''
+        n = css.charCodeAt(pos + 1)
+        if (
+          prev === 'url' &&
+          n !== SINGLE_QUOTE &&
+          n !== DOUBLE_QUOTE &&
+          n !== SPACE &&
+          n !== NEWLINE &&
+          n !== TAB &&
+          n !== FEED &&
+          n !== CR
+        ) {
+          next = pos
+          do {
+            escaped = false
+            next = css.indexOf(')', next + 1)
+            if (next === -1) {
+              if (ignore || ignoreUnclosed) {
+                next = pos
+                break
+              } else {
+                unclosed('bracket')
+              }
+            }
+            escapePos = next
+            while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
+              escapePos -= 1
+              escaped = !escaped
+            }
+          } while (escaped)
+
+          currentToken = ['brackets', css.slice(pos, next + 1), pos, next]
+
+          pos = next
+        } else {
+          next = css.indexOf(')', pos + 1)
+          content = css.slice(pos, next + 1)
+
+          if (next === -1 || RE_BAD_BRACKET.test(content)) {
+            currentToken = ['(', '(', pos]
+          } else {
+            currentToken = ['brackets', content, pos, next]
+            pos = next
+          }
+        }
+
+        break
+      }
+
+      case SINGLE_QUOTE:
+      case DOUBLE_QUOTE: {
+        quote = code === SINGLE_QUOTE ? "'" : '"'
+        next = pos
+        do {
+          escaped = false
+          next = css.indexOf(quote, next + 1)
+          if (next === -1) {
+            if (ignore || ignoreUnclosed) {
+              next = pos + 1
+              break
+            } else {
+              unclosed('string')
+            }
+          }
+          escapePos = next
+          while (css.charCodeAt(escapePos - 1) === BACKSLASH) {
+            escapePos -= 1
+            escaped = !escaped
+          }
+        } while (escaped)
+
+        currentToken = ['string', css.slice(pos, next + 1), pos, next]
+        pos = next
+        break
+      }
+
+      case AT: {
+        RE_AT_END.lastIndex = pos + 1
+        RE_AT_END.test(css)
+        if (RE_AT_END.lastIndex === 0) {
+          next = css.length - 1
+        } else {
+          next = RE_AT_END.lastIndex - 2
+        }
+
+        currentToken = ['at-word', css.slice(pos, next + 1), pos, next]
+
+        pos = next
+        break
+      }
+
+      case BACKSLASH: {
+        next = pos
+        escape = true
+        while (css.charCodeAt(next + 1) === BACKSLASH) {
+          next += 1
+          escape = !escape
+        }
+        code = css.charCodeAt(next + 1)
+        if (
+          escape &&
+          code !== SLASH &&
+          code !== SPACE &&
+          code !== NEWLINE &&
+          code !== TAB &&
+          code !== CR &&
+          code !== FEED
+        ) {
+          next += 1
+          if (RE_HEX_ESCAPE.test(css.charAt(next))) {
+            while (RE_HEX_ESCAPE.test(css.charAt(next + 1))) {
+              next += 1
+            }
+            if (css.charCodeAt(next + 1) === SPACE) {
+              next += 1
+            }
+          }
+        }
+
+        currentToken = ['word', css.slice(pos, next + 1), pos, next]
+
+        pos = next
+        break
+      }
+
+      default: {
+        if (code === SLASH && css.charCodeAt(pos + 1) === ASTERISK) {
+          next = css.indexOf('*/', pos + 2) + 1
+          if (next === 0) {
+            if (ignore || ignoreUnclosed) {
+              next = css.length
+            } else {
+              unclosed('comment')
+            }
+          }
+
+          currentToken = ['comment', css.slice(pos, next + 1), pos, next]
+          pos = next
+        } else {
+          RE_WORD_END.lastIndex = pos + 1
+          RE_WORD_END.test(css)
+          if (RE_WORD_END.lastIndex === 0) {
+            next = css.length - 1
+          } else {
+            next = RE_WORD_END.lastIndex - 2
+          }
+
+          currentToken = ['word', css.slice(pos, next + 1), pos, next]
+          buffer.push(currentToken)
+          pos = next
+        }
+
+        break
+      }
+    }
+
+    pos++
+    return currentToken
+  }
+
+  function back(token) {
+    returned.push(token)
+  }
+
+  return {
+    back,
+    endOfFile,
+    nextToken,
+    position
+  }
+}

node_modules/postcss/lib/warn-once.js

@@ -0,0 +1,13 @@
+/* eslint-disable no-console */
+'use strict'
+
+let printed = {}
+
+module.exports = function warnOnce(message) {
+  if (printed[message]) return
+  printed[message] = true
+
+  if (typeof console !== 'undefined' && console.warn) {
+    console.warn(message)
+  }
+}

node_modules/postcss/lib/warning.js

@@ -0,0 +1,37 @@
+'use strict'
+
+class Warning {
+  constructor(text, opts = {}) {
+    this.type = 'warning'
+    this.text = text
+
+    if (opts.node && opts.node.source) {
+      let range = opts.node.rangeBy(opts)
+      this.line = range.start.line
+      this.column = range.start.column
+      this.endLine = range.end.line
+      this.endColumn = range.end.column
+    }
+
+    for (let opt in opts) this[opt] = opts[opt]
+  }
+
+  toString() {
+    if (this.node) {
+      return this.node.error(this.text, {
+        index: this.index,
+        plugin: this.plugin,
+        word: this.word
+      }).message
+    }
+
+    if (this.plugin) {
+      return this.plugin + ': ' + this.text
+    }
+
+    return this.text
+  }
+}
+
+module.exports = Warning
+Warning.default = Warning