CodeMirror.defineMode("css", function(config) {

  var indentUnit = config.indentUnit, type;

  

  var atMediaTypes = keySet([

    "all", "aural", "braille", "handheld", "print", "projection", "screen",

    "tty", "tv", "embossed"

  ]);

  

  var atMediaFeatures = keySet([

    "width", "min-width", "max-width", "height", "min-height", "max-height",

    "device-width", "min-device-width", "max-device-width", "device-height",

    "min-device-height", "max-device-height", "aspect-ratio",

    "min-aspect-ratio", "max-aspect-ratio", "device-aspect-ratio",

    "min-device-aspect-ratio", "max-device-aspect-ratio", "color", "min-color",

    "max-color", "color-index", "min-color-index", "max-color-index",

    "monochrome", "min-monochrome", "max-monochrome", "resolution",

    "min-resolution", "max-resolution", "scan", "grid"

  ]);



  var propertyKeywords = keySet([

    "align-content", "align-items", "align-self", "alignment-adjust",

    "alignment-baseline", "anchor-point", "animation", "animation-delay",

    "animation-direction", "animation-duration", "animation-iteration-count",

    "animation-name", "animation-play-state", "animation-timing-function",

    "appearance", "azimuth", "backface-visibility", "background",

    "background-attachment", "background-clip", "background-color",

    "background-image", "background-origin", "background-position",

    "background-repeat", "background-size", "baseline-shift", "binding",

    "bleed", "bookmark-label", "bookmark-level", "bookmark-state",

    "bookmark-target", "border", "border-bottom", "border-bottom-color",

    "border-bottom-left-radius", "border-bottom-right-radius",

    "border-bottom-style", "border-bottom-width", "border-collapse",

    "border-color", "border-image", "border-image-outset",

    "border-image-repeat", "border-image-slice", "border-image-source",

    "border-image-width", "border-left", "border-left-color",

    "border-left-style", "border-left-width", "border-radius", "border-right",

    "border-right-color", "border-right-style", "border-right-width",

    "border-spacing", "border-style", "border-top", "border-top-color",

    "border-top-left-radius", "border-top-right-radius", "border-top-style",

    "border-top-width", "border-width", "bottom", "box-decoration-break",

    "box-shadow", "box-sizing", "break-after", "break-before", "break-inside",

    "caption-side", "clear", "clip", "color", "color-profile", "column-count",

    "column-fill", "column-gap", "column-rule", "column-rule-color",

    "column-rule-style", "column-rule-width", "column-span", "column-width",

    "columns", "content", "counter-increment", "counter-reset", "crop", "cue",

    "cue-after", "cue-before", "cursor", "direction", "display",

    "dominant-baseline", "drop-initial-after-adjust",

    "drop-initial-after-align", "drop-initial-before-adjust",

    "drop-initial-before-align", "drop-initial-size", "drop-initial-value",

    "elevation", "empty-cells", "fit", "fit-position", "flex", "flex-basis",

    "flex-direction", "flex-flow", "flex-grow", "flex-shrink", "flex-wrap",

    "float", "float-offset", "font", "font-feature-settings", "font-family",

    "font-kerning", "font-language-override", "font-size", "font-size-adjust",

    "font-stretch", "font-style", "font-synthesis", "font-variant",

    "font-variant-alternates", "font-variant-caps", "font-variant-east-asian",

    "font-variant-ligatures", "font-variant-numeric", "font-variant-position",

    "font-weight", "grid-cell", "grid-column", "grid-column-align",

    "grid-column-sizing", "grid-column-span", "grid-columns", "grid-flow",

    "grid-row", "grid-row-align", "grid-row-sizing", "grid-row-span",

    "grid-rows", "grid-template", "hanging-punctuation", "height", "hyphens",

    "icon", "image-orientation", "image-rendering", "image-resolution",

    "inline-box-align", "justify-content", "left", "letter-spacing",

    "line-break", "line-height", "line-stacking", "line-stacking-ruby",

    "line-stacking-shift", "line-stacking-strategy", "list-style",

    "list-style-image", "list-style-position", "list-style-type", "margin",

    "margin-bottom", "margin-left", "margin-right", "margin-top",

    "marker-offset", "marks", "marquee-direction", "marquee-loop",

    "marquee-play-count", "marquee-speed", "marquee-style", "max-height",

    "max-width", "min-height", "min-width", "move-to", "nav-down", "nav-index",

    "nav-left", "nav-right", "nav-up", "opacity", "order", "orphans", "outline",

    "outline-color", "outline-offset", "outline-style", "outline-width",

    "overflow", "overflow-style", "overflow-wrap", "overflow-x", "overflow-y",

    "padding", "padding-bottom", "padding-left", "padding-right", "padding-top",

    "page", "page-break-after", "page-break-before", "page-break-inside",

    "page-policy", "pause", "pause-after", "pause-before", "perspective",

    "perspective-origin", "pitch", "pitch-range", "play-during", "position",

    "presentation-level", "punctuation-trim", "quotes", "rendering-intent",

    "resize", "rest", "rest-after", "rest-before", "richness", "right",

    "rotation", "rotation-point", "ruby-align", "ruby-overhang",

    "ruby-position", "ruby-span", "size", "speak", "speak-as", "speak-header",

    "speak-numeral", "speak-punctuation", "speech-rate", "stress", "string-set",

    "tab-size", "table-layout", "target", "target-name", "target-new",

    "target-position", "text-align", "text-align-last", "text-decoration",

    "text-decoration-color", "text-decoration-line", "text-decoration-skip",

    "text-decoration-style", "text-emphasis", "text-emphasis-color",

    "text-emphasis-position", "text-emphasis-style", "text-height",

    "text-indent", "text-justify", "text-outline", "text-shadow",

    "text-space-collapse", "text-transform", "text-underline-position",

    "text-wrap", "top", "transform", "transform-origin", "transform-style",

    "transition", "transition-delay", "transition-duration",

    "transition-property", "transition-timing-function", "unicode-bidi",

    "vertical-align", "visibility", "voice-balance", "voice-duration",

    "voice-family", "voice-pitch", "voice-range", "voice-rate", "voice-stress",

    "voice-volume", "volume", "white-space", "widows", "width", "word-break",

    "word-spacing", "word-wrap", "z-index"

  ]);



  var colorKeywords = keySet([

    "black", "silver", "gray", "white", "maroon", "red", "purple", "fuchsia",

    "green", "lime", "olive", "yellow", "navy", "blue", "teal", "aqua"

  ]);

  

  var valueKeywords = keySet([

    "above", "absolute", "activeborder", "activecaption", "afar",

    "after-white-space", "ahead", "alias", "all", "all-scroll", "alternate",

    "always", "amharic", "amharic-abegede", "antialiased", "appworkspace",

    "arabic-indic", "armenian", "asterisks", "auto", "avoid", "background",

    "backwards", "baseline", "below", "bidi-override", "binary", "bengali",

    "blink", "block", "block-axis", "bold", "bolder", "border", "border-box",

    "both", "bottom", "break-all", "break-word", "button", "button-bevel",

    "buttonface", "buttonhighlight", "buttonshadow", "buttontext", "cambodian",

    "capitalize", "caps-lock-indicator", "caption", "captiontext", "caret",

    "cell", "center", "checkbox", "circle", "cjk-earthly-branch",

    "cjk-heavenly-stem", "cjk-ideographic", "clear", "clip", "close-quote",

    "col-resize", "collapse", "compact", "condensed", "contain", "content",

    "content-box", "context-menu", "continuous", "copy", "cover", "crop",

    "cross", "crosshair", "currentcolor", "cursive", "dashed", "decimal",

    "decimal-leading-zero", "default", "default-button", "destination-atop",

    "destination-in", "destination-out", "destination-over", "devanagari",

    "disc", "discard", "document", "dot-dash", "dot-dot-dash", "dotted",

    "double", "down", "e-resize", "ease", "ease-in", "ease-in-out", "ease-out",

    "element", "ellipsis", "embed", "end", "ethiopic", "ethiopic-abegede",

    "ethiopic-abegede-am-et", "ethiopic-abegede-gez", "ethiopic-abegede-ti-er",

    "ethiopic-abegede-ti-et", "ethiopic-halehame-aa-er",

    "ethiopic-halehame-aa-et", "ethiopic-halehame-am-et",

    "ethiopic-halehame-gez", "ethiopic-halehame-om-et",

    "ethiopic-halehame-sid-et", "ethiopic-halehame-so-et",

    "ethiopic-halehame-ti-er", "ethiopic-halehame-ti-et",

    "ethiopic-halehame-tig", "ew-resize", "expanded", "extra-condensed",

    "extra-expanded", "fantasy", "fast", "fill", "fixed", "flat", "footnotes",

    "forwards", "from", "geometricPrecision", "georgian", "graytext", "groove",

    "gujarati", "gurmukhi", "hand", "hangul", "hangul-consonant", "hebrew",

    "help", "hidden", "hide", "higher", "highlight", "highlighttext",

    "hiragana", "hiragana-iroha", "horizontal", "hsl", "hsla", "icon", "ignore",

    "inactiveborder", "inactivecaption", "inactivecaptiontext", "infinite",

    "infobackground", "infotext", "inherit", "initial", "inline", "inline-axis",

    "inline-block", "inline-table", "inset", "inside", "intrinsic", "invert",

    "italic", "justify", "kannada", "katakana", "katakana-iroha", "khmer",

    "landscape", "lao", "large", "larger", "left", "level", "lighter",

    "line-through", "linear", "lines", "list-item", "listbox", "listitem",

    "local", "logical", "loud", "lower", "lower-alpha", "lower-armenian",

    "lower-greek", "lower-hexadecimal", "lower-latin", "lower-norwegian",

    "lower-roman", "lowercase", "ltr", "malayalam", "match",

    "media-controls-background", "media-current-time-display",

    "media-fullscreen-button", "media-mute-button", "media-play-button",

    "media-return-to-realtime-button", "media-rewind-button",

    "media-seek-back-button", "media-seek-forward-button", "media-slider",

    "media-sliderthumb", "media-time-remaining-display", "media-volume-slider",

    "media-volume-slider-container", "media-volume-sliderthumb", "medium",

    "menu", "menulist", "menulist-button", "menulist-text",

    "menulist-textfield", "menutext", "message-box", "middle", "min-intrinsic",

    "mix", "mongolian", "monospace", "move", "multiple", "myanmar", "n-resize",

    "narrower", "navy", "ne-resize", "nesw-resize", "no-close-quote", "no-drop",

    "no-open-quote", "no-repeat", "none", "normal", "not-allowed", "nowrap",

    "ns-resize", "nw-resize", "nwse-resize", "oblique", "octal", "open-quote",

    "optimizeLegibility", "optimizeSpeed", "oriya", "oromo", "outset",

    "outside", "overlay", "overline", "padding", "padding-box", "painted",

    "paused", "persian", "plus-darker", "plus-lighter", "pointer", "portrait",

    "pre", "pre-line", "pre-wrap", "preserve-3d", "progress", "push-button",

    "radio", "read-only", "read-write", "read-write-plaintext-only", "relative",

    "repeat", "repeat-x", "repeat-y", "reset", "reverse", "rgb", "rgba",

    "ridge", "right", "round", "row-resize", "rtl", "run-in", "running",

    "s-resize", "sans-serif", "scroll", "scrollbar", "se-resize", "searchfield",

    "searchfield-cancel-button", "searchfield-decoration",

    "searchfield-results-button", "searchfield-results-decoration",

    "semi-condensed", "semi-expanded", "separate", "serif", "show", "sidama",

    "single", "skip-white-space", "slide", "slider-horizontal",

    "slider-vertical", "sliderthumb-horizontal", "sliderthumb-vertical", "slow",

    "small", "small-caps", "small-caption", "smaller", "solid", "somali",

    "source-atop", "source-in", "source-out", "source-over", "space", "square",

    "square-button", "start", "static", "status-bar", "stretch", "stroke",

    "sub", "subpixel-antialiased", "super", "sw-resize", "table",

    "table-caption", "table-cell", "table-column", "table-column-group",

    "table-footer-group", "table-header-group", "table-row", "table-row-group",

    "telugu", "text", "text-bottom", "text-top", "textarea", "textfield", "thai",

    "thick", "thin", "threeddarkshadow", "threedface", "threedhighlight",

    "threedlightshadow", "threedshadow", "tibetan", "tigre", "tigrinya-er",

    "tigrinya-er-abegede", "tigrinya-et", "tigrinya-et-abegede", "to", "top",

    "transparent", "ultra-condensed", "ultra-expanded", "underline", "up",

    "upper-alpha", "upper-armenian", "upper-greek", "upper-hexadecimal",

    "upper-latin", "upper-norwegian", "upper-roman", "uppercase", "urdu", "url",

    "vertical", "vertical-text", "visible", "visibleFill", "visiblePainted",

    "visibleStroke", "visual", "w-resize", "wait", "wave", "white", "wider",

    "window", "windowframe", "windowtext", "x-large", "x-small", "xor",

    "xx-large", "xx-small", "yellow"

  ]);



  function keySet(array) { var keys = {}; for (var i = 0; i < array.length; ++i) keys[array[i]] = true; return keys; }

  function ret(style, tp) {type = tp; return style;}



  function tokenBase(stream, state) {

    var ch = stream.next();

    if (ch == "@") {stream.eatWhile(/[\w\\\-]/); return ret("def", stream.current());}

    else if (ch == "/" && stream.eat("*")) {

      state.tokenize = tokenCComment;

      return tokenCComment(stream, state);

    }

    else if (ch == "<" && stream.eat("!")) {

      state.tokenize = tokenSGMLComment;

      return tokenSGMLComment(stream, state);

    }

    else if (ch == "=") ret(null, "compare");

    else if ((ch == "~" || ch == "|") && stream.eat("=")) return ret(null, "compare");

    else if (ch == "\"" || ch == "'") {

      state.tokenize = tokenString(ch);

      return state.tokenize(stream, state);

    }

    else if (ch == "#") {

      stream.eatWhile(/[\w\\\-]/);

      return ret("atom", "hash");

    }

    else if (ch == "!") {

      stream.match(/^\s*\w*/);

      return ret("keyword", "important");

    }

    else if (/\d/.test(ch)) {

      stream.eatWhile(/[\w.%]/);

      return ret("number", "unit");

    }

    else if (ch === "-") {

      if (/\d/.test(stream.peek())) {

        stream.eatWhile(/[\w.%]/);

        return ret("number", "unit");

      } else if (stream.match(/^[^-]+-/)) {

        return ret("meta", type);

      }

    }

    else if (/[,+>*\/]/.test(ch)) {

      return ret(null, "select-op");

    }

    else if (ch == "." && stream.match(/^-?[_a-z][_a-z0-9-]*/i)) {

      return ret("qualifier", type);

    }

    else if (ch == ":") {

      return ret("operator", ch);

    }

    else if (/[;{}\[\]\(\)]/.test(ch)) {

      return ret(null, ch);

    }

    else {

      stream.eatWhile(/[\w\\\-]/);

      return ret("property", "variable");

    }

  }



  function tokenCComment(stream, state) {

    var maybeEnd = false, ch;

    while ((ch = stream.next()) != null) {

      if (maybeEnd && ch == "/") {

        state.tokenize = tokenBase;

        break;

      }

      maybeEnd = (ch == "*");

    }

    return ret("comment", "comment");

  }



  function tokenSGMLComment(stream, state) {

    var dashes = 0, ch;

    while ((ch = stream.next()) != null) {

      if (dashes >= 2 && ch == ">") {

        state.tokenize = tokenBase;

        break;

      }

      dashes = (ch == "-") ? dashes + 1 : 0;

    }

    return ret("comment", "comment");

  }



  function tokenString(quote) {

    return function(stream, state) {

      var escaped = false, ch;

      while ((ch = stream.next()) != null) {

        if (ch == quote && !escaped)

          break;

        escaped = !escaped && ch == "\\";

      }

      if (!escaped) state.tokenize = tokenBase;

      return ret("string", "string");

    };

  }



  return {

    startState: function(base) {

      return {tokenize: tokenBase,

              baseIndent: base || 0,

              stack: []};

    },



    token: function(stream, state) {

      

      // Use these terms when applicable (see http://www.xanthir.com/blog/b4E50)

      // 

      // rule** or **ruleset:

      // A selector + braces combo, or an at-rule.

      // 

      // declaration block:

      // A sequence of declarations.

      // 

      // declaration:

      // A property + colon + value combo.

      // 

      // property value:

      // The entire value of a property.

      // 

      // component value:

      // A single piece of a property value. Like the 5px in

      // text-shadow: 0 0 5px blue;. Can also refer to things that are

      // multiple terms, like the 1-4 terms that make up the background-size

      // portion of the background shorthand.

      // 

      // term:

      // The basic unit of author-facing CSS, like a single number (5),

      // dimension (5px), string ("foo"), or function. Officially defined

      //  by the CSS 2.1 grammar (look for the 'term' production)

      // 

      // 

      // simple selector:

      // A single atomic selector, like a type selector, an attr selector, a

      // class selector, etc.

      // 

      // compound selector:

      // One or more simple selectors without a combinator. div.example is

      // compound, div > .example is not.

      // 

      // complex selector:

      // One or more compound selectors chained with combinators.

      // 

      // combinator:

      // The parts of selectors that express relationships. There are four

      // currently - the space (descendant combinator), the greater-than

      // bracket (child combinator), the plus sign (next sibling combinator),

      // and the tilda (following sibling combinator).

      // 

      // sequence of selectors:

      // One or more of the named type of selector chained with commas.



      if (stream.eatSpace()) return null;

      var style = state.tokenize(stream, state);



      // Changing style returned based on context

      var context = state.stack[state.stack.length-1];

      if (style == "property") {

        if (context == "propertyValue"){

          if (valueKeywords[stream.current()]) {

            style = "string-2";

          } else if (colorKeywords[stream.current()]) {

            style = "keyword";

          } else {

            style = "variable-2";

          }

        } else if (context == "rule") {

          if (!propertyKeywords[stream.current()]) {

            style += " error";

          }

        } else if (!context || context == "@media{") {

          style = "tag";

        } else if (context == "@media") {

          if (atMediaTypes[stream.current()]) {

            style = "attribute"; // Known attribute

          } else if (/^(only|not)$/i.test(stream.current())) {

            style = "keyword";

          } else if (stream.current().toLowerCase() == "and") {

            style = "error"; // "and" is only allowed in @mediaType

          } else if (atMediaFeatures[stream.current()]) {

            style = "error"; // Known property, should be in @mediaType(

          } else {

            // Unknown, expecting keyword or attribute, assuming attribute

            style = "attribute error";

          }

        } else if (context == "@mediaType") {

          if (atMediaTypes[stream.current()]) {

            style = "attribute";

          } else if (stream.current().toLowerCase() == "and") {

            style = "operator";

          } else if (/^(only|not)$/i.test(stream.current())) {

            style = "error"; // Only allowed in @media

          } else if (atMediaFeatures[stream.current()]) {

            style = "error"; // Known property, should be in parentheses

          } else {

            // Unknown attribute or property, but expecting property (preceded

            // by "and"). Should be in parentheses

            style = "error";

          }

        } else if (context == "@mediaType(") {

          if (propertyKeywords[stream.current()]) {

            // do nothing, remains "property"

          } else if (atMediaTypes[stream.current()]) {

            style = "error"; // Known property, should be in parentheses

          } else if (stream.current().toLowerCase() == "and") {

            style = "operator";

          } else if (/^(only|not)$/i.test(stream.current())) {

            style = "error"; // Only allowed in @media

          } else {

            style += " error";

          }

        } else {

          style = "error";

        }

      } else if (style == "atom") {

        if(!context || context == "@media{") {

          style = "builtin";

        } else if (context == "propertyValue") {

          if (!/^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/.test(stream.current())) {

            style += " error";

          }

        } else {

          style = "error";

        }

      } else if (context == "@media" && type == "{") {

        style = "error";

      }



      // Push/pop context stack

      if (type == "{") {

        if (context == "@media" || context == "@mediaType") {

          state.stack.pop();

          state.stack[state.stack.length-1] = "@media{";

        }

        else state.stack.push("rule");

      }

      else if (type == "}") {

        state.stack.pop();

        if (context == "propertyValue") state.stack.pop();

      }

      else if (type == "@media") state.stack.push("@media");

      else if (context == "@media" && /\b(keyword|attribute)\b/.test(style))

        state.stack.push("@mediaType");

      else if (context == "@mediaType" && stream.current() == ",") state.stack.pop();

      else if (context == "@mediaType" && type == "(") state.stack.push("@mediaType(");

      else if (context == "@mediaType(" && type == ")") state.stack.pop();

      else if (context == "rule" && type == ":") state.stack.push("propertyValue");

      else if (context == "propertyValue" && type == ";") state.stack.pop();

      return style;

    },



    indent: function(state, textAfter) {

      var n = state.stack.length;

      if (/^\}/.test(textAfter))

        n -= state.stack[state.stack.length-1] == "propertyValue" ? 2 : 1;

      return state.baseIndent + n * indentUnit;

    },



    electricChars: "}"

  };

});



CodeMirror.defineMIME("text/css", "css");

