const _DIGIT = "(?:0|[1-9]\\d*)";
const _COMPARE = "clamp|max|min";
const _EXPO = "exp|hypot|log|pow|sqrt";
const _SIGN = "abs|sign";
const _STEP = "mod|rem|round";
const _TRIG = "a?(?:cos|sin|tan)|atan2";
const _MATH = `${_COMPARE}|${_EXPO}|${_SIGN}|${_STEP}|${_TRIG}`;
const _CALC = `calc|${_MATH}`;
const _VAR = `var|${_CALC}`;
const ANGLE = "deg|g?rad|turn";
const LENGTH = "[cm]m|[dls]?v(?:[bhiw]|max|min)|in|p[ctx]|q|r?(?:[cl]h|cap|e[mx]|ic)";
const NUM = `[+-]?(?:${_DIGIT}(?:\\.\\d*)?|\\.\\d+)(?:e-?${_DIGIT})?`;
const NUM_POSITIVE = `\\+?(?:${_DIGIT}(?:\\.\\d*)?|\\.\\d+)(?:e-?${_DIGIT})?`;
const NONE = "none";
const PCT = `${NUM}%`;
const SYN_FN_CALC = `^(?:${_CALC})\\(|(?<=[*\\/\\s\\(])(?:${_CALC})\\(`;
const SYN_FN_MATH_START = `^(?:${_MATH})\\($`;
const SYN_FN_VAR = "^var\\(|(?<=[*\\/\\s\\(])var\\(";
const SYN_FN_VAR_START = `^(?:${_VAR})\\(`;
const _ALPHA = `(?:\\s*\\/\\s*(?:${NUM}|${PCT}|${NONE}))?`;
const _ALPHA_LV3 = `(?:\\s*,\\s*(?:${NUM}|${PCT}))?`;
const _COLOR_FUNC = "(?:ok)?l(?:ab|ch)|color|hsla?|hwb|rgba?";
const _COLOR_KEY = "[a-z]+|#[\\da-f]{3}|#[\\da-f]{4}|#[\\da-f]{6}|#[\\da-f]{8}";
const _CS_HUE = "(?:ok)?lch|hsl|hwb";
const _CS_HUE_ARC = "(?:de|in)creasing|longer|shorter";
const _NUM_ANGLE = `${NUM}(?:${ANGLE})?`;
const _NUM_ANGLE_NONE = `(?:${NUM}(?:${ANGLE})?|${NONE})`;
const _NUM_PCT_NONE = `(?:${NUM}|${PCT}|${NONE})`;
const CS_HUE = `(?:${_CS_HUE})(?:\\s(?:${_CS_HUE_ARC})\\shue)?`;
const CS_HUE_CAPT = `(${_CS_HUE})(?:\\s(${_CS_HUE_ARC})\\shue)?`;
const CS_LAB = "(?:ok)?lab";
const CS_LCH = "(?:ok)?lch";
const CS_SRGB = "srgb(?:-linear)?";
const CS_RGB = `(?:a98|prophoto)-rgb|display-p3|rec2020|${CS_SRGB}`;
const CS_XYZ = "xyz(?:-d(?:50|65))?";
const CS_RECT = `${CS_LAB}|${CS_RGB}|${CS_XYZ}`;
const CS_MIX = `${CS_HUE}|${CS_RECT}`;
const FN_COLOR = "color(";
const FN_LIGHT_DARK = "light-dark(";
const FN_MIX = "color-mix(";
const FN_REL = `(?:${_COLOR_FUNC})\\(\\s*from\\s+`;
const FN_REL_CAPT = `(${_COLOR_FUNC})\\(\\s*from\\s+`;
const FN_VAR = "var(";
const SYN_FN_COLOR = `(?:${CS_RGB}|${CS_XYZ})(?:\\s+${_NUM_PCT_NONE}){3}${_ALPHA}`;
const SYN_FN_LIGHT_DARK = "^light-dark\\(";
const SYN_FN_REL = `^${FN_REL}|(?<=[\\s])${FN_REL}`;
const SYN_HSL = `${_NUM_ANGLE_NONE}(?:\\s+${_NUM_PCT_NONE}){2}${_ALPHA}`;
const SYN_HSL_LV3 = `${_NUM_ANGLE}(?:\\s*,\\s*${PCT}){2}${_ALPHA_LV3}`;
const SYN_LCH = `(?:${_NUM_PCT_NONE}\\s+){2}${_NUM_ANGLE_NONE}${_ALPHA}`;
const SYN_MOD = `${_NUM_PCT_NONE}(?:\\s+${_NUM_PCT_NONE}){2}${_ALPHA}`;
const SYN_RGB_LV3 = `(?:${NUM}(?:\\s*,\\s*${NUM}){2}|${PCT}(?:\\s*,\\s*${PCT}){2})${_ALPHA_LV3}`;
const SYN_COLOR_TYPE = `${_COLOR_KEY}|hsla?\\(\\s*${SYN_HSL_LV3}\\s*\\)|rgba?\\(\\s*${SYN_RGB_LV3}\\s*\\)|(?:hsla?|hwb)\\(\\s*${SYN_HSL}\\s*\\)|(?:(?:ok)?lab|rgba?)\\(\\s*${SYN_MOD}\\s*\\)|(?:ok)?lch\\(\\s*${SYN_LCH}\\s*\\)|color\\(\\s*${SYN_FN_COLOR}\\s*\\)`;
const SYN_MIX_PART = `(?:${SYN_COLOR_TYPE})(?:\\s+${PCT})?`;
const SYN_MIX = `color-mix\\(\\s*in\\s+(?:${CS_MIX})\\s*,\\s*${SYN_MIX_PART}\\s*,\\s*${SYN_MIX_PART}\\s*\\)`;
const SYN_MIX_CAPT = `color-mix\\(\\s*in\\s+(${CS_MIX})\\s*,\\s*(${SYN_MIX_PART})\\s*,\\s*(${SYN_MIX_PART})\\s*\\)`;
const VAL_COMP = "computedValue";
const VAL_MIX = "mixValue";
const VAL_SPEC = "specifiedValue";
export {
  ANGLE,
  CS_HUE,
  CS_HUE_CAPT,
  CS_LAB,
  CS_LCH,
  CS_MIX,
  CS_RECT,
  CS_RGB,
  CS_SRGB,
  CS_XYZ,
  FN_COLOR,
  FN_LIGHT_DARK,
  FN_MIX,
  FN_REL,
  FN_REL_CAPT,
  FN_VAR,
  LENGTH,
  NONE,
  NUM,
  NUM_POSITIVE,
  PCT,
  SYN_COLOR_TYPE,
  SYN_FN_CALC,
  SYN_FN_COLOR,
  SYN_FN_LIGHT_DARK,
  SYN_FN_MATH_START,
  SYN_FN_REL,
  SYN_FN_VAR,
  SYN_FN_VAR_START,
  SYN_HSL,
  SYN_HSL_LV3,
  SYN_LCH,
  SYN_MIX,
  SYN_MIX_CAPT,
  SYN_MIX_PART,
  SYN_MOD,
  SYN_RGB_LV3,
  VAL_COMP,
  VAL_MIX,
  VAL_SPEC
};
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