0.2.0 - Mid migration

web/node_modules/@csstools/convert-colors/CHANGELOG.md

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+# Changes to Convert Colors
+
+### 1.4.0 (January 27, 2018)
+
+- Add LCH conversions
+- Allow fallbacks in RGB conversions (for gray conversions)
+- Add Lab and LCH tests
+- Simplify test array joining
+- Rename references from "LAB" to "Lab"
+
+### 1.3.0 (January 25, 2018)
+
+- Export all converter combinations of `rgb`, `hsl`, `hwb`, `lab`, `hsv`,
+  `xyz`, and also the `rgb2hue` converter
+- Organize library into files
+
+### 1.2.0 (January 24, 2018)
+
+- Export `rgb2lab`, `lab2rgb`, `hsl2lab`, etc. converters
+
+### 1.1.0 (January 22, 2018)
+
+- Export `rgb2hue` converter
+
+### 1.0.0 (January 21, 2018)
+
+- Initial version

web/node_modules/@csstools/convert-colors/LICENSE.md

@@ -0,0 +1,108 @@
+# CC0 1.0 Universal
+
+## Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
+exclusive Copyright and Related Rights (defined below) upon the creator and
+subsequent owner(s) (each and all, an “owner”) of an original work of
+authorship and/or a database (each, a “Work”).
+
+Certain owners wish to permanently relinquish those rights to a Work for the
+purpose of contributing to a commons of creative, cultural and scientific works
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+redistribute as freely as possible in any form whatsoever and for any purposes,
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+to the Commons to promote the ideal of a free culture and the further
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+
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+
+2. Waiver. To the greatest extent permitted by, but not in contravention of,
+   applicable law, Affirmer hereby overtly, fully, permanently, irrevocably and
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+   extensions), (iii) in any current or future medium and for any number of
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+   shall be deemed effective as of the date CC0 was applied by Affirmer to the
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+   invalid or ineffective under applicable law, such partial invalidity or
+   ineffectiveness shall not invalidate the remainder of the License, and in
+   such case Affirmer hereby affirms that he or she will not (i) exercise any
+   of his or her remaining Copyright and Related Rights in the Work or (ii)
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+4. Limitations and Disclaimers.
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web/node_modules/@csstools/convert-colors/README.md

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+# Convert Colors [<img src="https://cdn.worldvectorlogo.com/logos/nodejs-icon.svg" alt="Convert Colors" width="90" height="90" align="right">][Convert Colors]
+
+[![NPM Version][npm-img]][npm-url]
+[![Linux Build Status][cli-img]][cli-url]
+[![Windows Build Status][win-img]][win-url]
+
+[Convert Colors] converts colors between RGB, HSL, HWB, Lab, LCH, HSV, and XYZ.
+
+```js
+import convert from '@csstools/convert-colors';
+
+convert.rgb2hsl(100, 100, 100); // [ 0, 0, 100 ]
+convert.rgb2hwb(100, 100, 100); // [ 0, 100, 0 ]
+
+convert.hsl2rgb(0, 0, 100); // [ 0, 100, 0 ]
+convert.hsl2hwb(0, 0, 100); // [ 0, 100, 0 ]
+
+convert.hwb2rgb(0, 100, 0); // [ 0, 0, 100 ]
+convert.hwb2hsl(0, 100, 0); // [ 0, 0, 100 ]
+
+convert.rgb2hue(0, 0, 100); // 240
+```
+
+## Usage
+
+Add [Convert Colors] to your build tool:
+
+```bash
+npm install @csstools/convert-colors --save-dev
+```
+
+## Features
+
+Conversions work by taking arguments that represents a color in one color space
+and returning an array of that same color in another color space.
+
+- rgb2hsl(r, g, b)
+- rgb2hwb(r, g, b)
+- rgb2lab(r, g, b)
+- rgb2lch(r, g, b)
+- rgb2hsv(r, g, b)
+- rgb2xyz(r, g, b)
+- hsl2rgb(h, s, l)
+- hsl2hwb(h, s, l)
+- hsl2lab(h, s, l)
+- hsl2lch(h, s, l)
+- hsl2hsv(h, s, l)
+- hsl2xyz(h, s, l)
+- hwb2rgb(h, w, b)
+- hwb2hsl(h, w, b)
+- hwb2lab(h, w, b)
+- hwb2lch(h, w, b)
+- hwb2hsv(h, w, b)
+- hwb2xyz(h, w, b)
+- lab2rgb(l, a, b)
+- lab2hsl(l, a, b)
+- lab2hwb(l, a, b)
+- lab2lch(l, a, b)
+- lab2hsv(l, a, b)
+- lab2xyz(l, a, b)
+- lch2rgb(l, c, h)
+- lch2hsl(l, c, h)
+- lch2hwb(l, c, h)
+- lch2lab(l, c, h)
+- lch2hsv(l, c, h)
+- lch2xyz(l, c, h)
+- hsv2rgb(h, s, v)
+- hsv2hsl(h, s, v)
+- hsv2hwb(h, s, v)
+- hsv2lab(h, s, v)
+- hsv2lch(h, s, v)
+- hsv2xyz(h, s, v)
+- xyz2rgb(x, y, z)
+- xyz2hsl(x, y, z)
+- xyz2hwb(x, y, z)
+- xyz2lab(x, y, z)
+- xyz2lch(x, y, z)
+- xyz2hsv(x, y, z)
+
+[npm-url]: https://www.npmjs.com/package/@csstools/convert-colors
+[npm-img]: https://img.shields.io/npm/v/@csstools/convert-colors.svg
+[cli-url]: https://travis-ci.org/jonathantneal/convert-colors
+[cli-img]: https://img.shields.io/travis/jonathantneal/convert-colors.svg
+[win-url]: https://ci.appveyor.com/project/jonathantneal/convert-colors
+[win-img]: https://img.shields.io/appveyor/ci/jonathantneal/convert-colors.svg
+
+[Convert Colors]: https://github.com/jonathantneal/convert-colors

web/node_modules/@csstools/convert-colors/index.js

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+import { rgb2hsl, hsl2rgb } from './lib/rgb-hsl';
+import { rgb2hwb, hwb2rgb } from './lib/rgb-hwb';
+import { rgb2hsv, hsv2rgb } from './lib/rgb-hsv';
+import { rgb2xyz, xyz2rgb } from './lib/rgb-xyz';
+import { hsl2hsv, hsv2hsl } from './lib/hsl-hsv';
+import { hwb2hsv, hsv2hwb } from './lib/hwb-hsv';
+import { lab2xyz, xyz2lab } from './lib/lab-xyz';
+import { lab2lch, lch2lab } from './lib/lab-lch';
+import { rgb2hue } from './lib/util';
+
+/* Convert between RGB and Lab
+/* ========================================================================== */
+
+function rgb2lab(rgbR, rgbG, rgbB) {
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+
+	return [ labL, labA, labB ];
+}
+
+function lab2rgb(labL, labA, labB) {
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+
+	return [ rgbR, rgbG, rgbB ];
+}
+
+/* Convert between RGB and LCH
+/* ========================================================================== */
+
+function rgb2lch(rgbR, rgbG, rgbB) {
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+	const [ lchL, lchC, lchH ] = lab2lch(labL, labA, labB);
+
+	return [ lchL, lchC, lchH ];
+}
+
+function lch2rgb(lchL, lchC, lchH) {
+	const [ labL, labA, labB ] = lch2lab(lchL, lchC, lchH);
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+
+	return [ rgbR, rgbG, rgbB ];
+}
+
+/* Convert between HSL and HWB
+/* ========================================================================== */
+
+function hwb2hsl(hwbH, hwbW, hwbB) {
+	const [ hsvH, hsvS, hsvV ] = hwb2hsv(hwbH, hwbW, hwbB);
+	const [ hslH, hslS, hslL ] = hsv2hsl(hsvH, hsvS, hsvV);
+
+	return [ hslH, hslS, hslL ];
+}
+
+function hsl2hwb(hslH, hslS, hslL) {
+	const [ , hsvS, hsvV ] = hsl2hsv(hslH, hslS, hslL);
+	const [ , hwbW, hwbB ] = hsv2hwb(hslH, hsvS, hsvV);
+
+	return [ hslH, hwbW, hwbB ];
+}
+
+/* Convert between HSL and Lab
+/* ========================================================================== */
+
+function hsl2lab(hslH, hslS, hslL) {
+	const [ rgbR, rgbG, rgbB ] = hsl2rgb(hslH, hslS, hslL);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+
+	return [ labL, labA, labB ];
+}
+
+function lab2hsl(labL, labA, labB, fallbackhue) {
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hslH, hslS, hslL ] = rgb2hsl(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hslH, hslS, hslL ];
+}
+
+/* Convert between HSL and LCH
+/* ========================================================================== */
+
+function hsl2lch(hslH, hslS, hslL) {
+	const [ rgbR, rgbG, rgbB ] = hsl2rgb(hslH, hslS, hslL);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+	const [ lchL, lchC, lchH ] = lab2lch(labL, labA, labB);
+
+	return [ lchL, lchC, lchH ];
+}
+
+function lch2hsl(lchL, lchC, lchH, fallbackhue) {
+	const [ labL, labA, labB ] = lch2lab(lchL, lchC, lchH);
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hslH, hslS, hslL ] = rgb2hsl(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hslH, hslS, hslL ];
+}
+
+/* Convert between HSL and XYZ
+/* ========================================================================== */
+
+function hsl2xyz(hslH, hslS, hslL) {
+	const [ rgbR, rgbG, rgbB ] = hsl2rgb(hslH, hslS, hslL);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+
+	return [ xyzX, xyzY, xyzZ ];
+}
+
+function xyz2hsl(xyzX, xyzY, xyzZ, fallbackhue) {
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hslH, hslS, hslL ] = rgb2hsl(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hslH, hslS, hslL ];
+}
+
+/* Convert between HWB and Lab
+/* ========================================================================== */
+
+function hwb2lab(hwbH, hwbW, hwbB) {
+	const [ rgbR, rgbG, rgbB ] = hwb2rgb(hwbH, hwbW, hwbB);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+
+	return [ labL, labA, labB ];
+}
+
+function lab2hwb(labL, labA, labB, fallbackhue) {
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hwbH, hwbW, hwbB ] = rgb2hwb(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hwbH, hwbW, hwbB ];
+}
+
+/* Convert between HWB and LCH
+/* ========================================================================== */
+
+function hwb2lch(hwbH, hwbW, hwbB) {
+	const [ rgbR, rgbG, rgbB ] = hwb2rgb(hwbH, hwbW, hwbB);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+	const [ lchL, lchC, lchH ] = lab2lch(labL, labA, labB);
+
+	return [ lchL, lchC, lchH ];
+}
+
+function lch2hwb(lchL, lchC, lchH, fallbackhue) {
+	const [ labL, labA, labB ] = lch2lab(lchL, lchC, lchH);
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hwbH, hwbW, hwbB ] = rgb2hwb(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hwbH, hwbW, hwbB ];
+}
+
+/* Convert between HWB and XYZ
+/* ========================================================================== */
+
+function hwb2xyz(hwbH, hwbW, hwbB) {
+	const [ rgbR, rgbG, rgbB ] = hwb2rgb(hwbH, hwbW, hwbB);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+
+	return [ xyzX, xyzY, xyzZ ];
+}
+
+function xyz2hwb(xyzX, xyzY, xyzZ, fallbackhue) {
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hwbH, hwbW, hwbB ] = rgb2hwb(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hwbH, hwbW, hwbB ];
+}
+
+/* Convert between HSV and Lab
+/* ========================================================================== */
+
+function hsv2lab(hsvH, hsvS, hsvV) {
+	const [ rgbR, rgbG, rgbB ] = hsv2rgb(hsvH, hsvS, hsvV);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+
+	return [ labL, labA, labB ];
+}
+
+function lab2hsv(labL, labA, labB, fallbackhue) {
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hsvH, hsvS, hsvV ] = rgb2hsv(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hsvH, hsvS, hsvV ];
+}
+
+/* Convert between HSV and LCH
+/* ========================================================================== */
+
+function hsv2lch(hsvH, hsvS, hsvV) {
+	const [ rgbR, rgbG, rgbB ] = hsv2rgb(hsvH, hsvS, hsvV);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+	const [ lchL, lchC, lchH ] = lab2lch(labL, labA, labB);
+
+	return [ lchL, lchC, lchH ];
+}
+
+function lch2hsv(lchL, lchC, lchH, fallbackhue) {
+	const [ labL, labA, labB ] = lch2lab(lchL, lchC, lchH);
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hsvH, hsvS, hsvV ] = rgb2hsv(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hsvH, hsvS, hsvV ];
+}
+
+/* Convert between HSV and XYZ
+/* ========================================================================== */
+
+function hsv2xyz(hsvH, hsvS, hsvV) {
+	const [ rgbR, rgbG, rgbB ] = hsv2rgb(hsvH, hsvS, hsvV);
+	const [ xyzX, xyzY, xyzZ ] = rgb2xyz(rgbR, rgbG, rgbB);
+
+	return [ xyzX, xyzY, xyzZ ];
+}
+
+function xyz2hsv(xyzX, xyzY, xyzZ, fallbackhue) {
+	const [ rgbR, rgbG, rgbB ] = xyz2rgb(xyzX, xyzY, xyzZ);
+	const [ hsvH, hsvS, hsvV ] = rgb2hsv(rgbR, rgbG, rgbB, fallbackhue);
+
+	return [ hsvH, hsvS, hsvV ];
+}
+
+/* Convert between XYZ and LCH
+/* ========================================================================== */
+
+function xyz2lch(xyzX, xyzY, xyzZ) {
+	const [ labL, labA, labB ] = xyz2lab(xyzX, xyzY, xyzZ);
+	const [ lchL, lchC, lchH ] = lab2lch(labL, labA, labB);
+
+	return [ lchL, lchC, lchH ];
+}
+
+function lch2xyz(lchL, lchC, lchH) {
+	const [ labL, labA, labB ] = lch2lab(lchL, lchC, lchH);
+	const [ xyzX, xyzY, xyzZ ] = lab2xyz(labL, labA, labB);
+
+	return [ xyzX, xyzY, xyzZ ];
+}
+
+/* All Conversions
+/* ========================================================================== */
+
+export {
+	rgb2hsl,
+	rgb2hwb,
+	rgb2lab,
+	rgb2lch,
+	rgb2hsv,
+	rgb2xyz,
+
+	hsl2rgb,
+	hsl2hwb,
+	hsl2lab,
+	hsl2lch,
+	hsl2hsv,
+	hsl2xyz,
+
+	hwb2rgb,
+	hwb2hsl,
+	hwb2lab,
+	hwb2lch,
+	hwb2hsv,
+	hwb2xyz,
+
+	lab2rgb,
+	lab2hsl,
+	lab2hwb,
+	lab2lch,
+	lab2hsv,
+	lab2xyz,
+
+	lch2rgb,
+	lch2hsl,
+	lch2hwb,
+	lch2lab,
+	lch2hsv,
+	lch2xyz,
+
+	hsv2rgb,
+	hsv2hsl,
+	hsv2hwb,
+	hsv2lab,
+	hsv2lch,
+	hsv2xyz,
+
+	xyz2rgb,
+	xyz2hsl,
+	xyz2hwb,
+	xyz2lab,
+	xyz2lch,
+	xyz2hsv,
+
+	rgb2hue
+};
+
+export default {
+	rgb2hsl,
+	rgb2hwb,
+	rgb2lab,
+	rgb2lch,
+	rgb2hsv,
+	rgb2xyz,
+
+	hsl2rgb,
+	hsl2hwb,
+	hsl2lab,
+	hsl2lch,
+	hsl2hsv,
+	hsl2xyz,
+
+	hwb2rgb,
+	hwb2hsl,
+	hwb2lab,
+	hwb2lch,
+	hwb2hsv,
+	hwb2xyz,
+
+	lab2rgb,
+	lab2hsl,
+	lab2hwb,
+	lab2lch,
+	lab2hsv,
+	lab2xyz,
+
+	lch2rgb,
+	lch2hsl,
+	lch2hwb,
+	lch2lab,
+	lch2hsv,
+	lch2xyz,
+
+	hsv2rgb,
+	hsv2hsl,
+	hsv2hwb,
+	hsv2lab,
+	hsv2lch,
+	hsv2xyz,
+
+	xyz2rgb,
+	xyz2hsl,
+	xyz2hwb,
+	xyz2lab,
+	xyz2lch,
+	xyz2hsv,
+
+	rgb2hue
+};

web/node_modules/@csstools/convert-colors/lib/hsl-hsv.js

@@ -0,0 +1,30 @@
+/* Convert between HSL and HSV
+/* ========================================================================== */
+
+export function hsl2hsv(hslH, hslS, hslL) {
+	const hsv1 = hslS * (hslL < 50 ? hslL : 100 - hslL) / 100;
+	const hsvS = hsv1 === 0 ? 0 : 2 * hsv1 / (hslL + hsv1) * 100;
+	const hsvV = hslL + hsv1;
+
+	return [ hslH, hsvS, hsvV ];
+}
+
+export function hsv2hsl(hsvH, hsvS, hsvV) {
+	const hslL = (200 - hsvS) * hsvV / 100;
+
+	const [ hslS, hslV ] = [
+		hslL === 0 || hslL === 200 ? 0 : hsvS * hsvV / 100 / (hslL <= 100 ? hslL : 200 - hslL) * 100,
+		hslL * 5 / 10
+	];
+
+	return [ hsvH, hslS, hslV ];
+}
+
+/*
+
+References
+----------
+
+- https://gist.github.com/defims/0ca2ef8832833186ed396a2f8a204117
+
+/* ========================================================================== */

web/node_modules/@csstools/convert-colors/lib/hwb-hsv.js

@@ -0,0 +1,31 @@
+/* Convert between HWB and HSV
+/* ========================================================================== */
+
+export function hwb2hsv(hwbH, hwbW, hwbB) {
+	const [ hsvH, hsvS, hsvV ] = [
+		hwbH,
+		hwbB === 100 ? 0 : 100 - hwbW / (100 - hwbB) * 100,
+		100 - hwbB
+	];
+
+	return [ hsvH, hsvS, hsvV ];
+}
+
+export function hsv2hwb(hsvH, hsvS, hsvV) {
+	const [ hwbH, hwbW, hwbB ] = [
+		hsvH,
+		(100 - hsvS) * hsvV / 100,
+		100 - hsvV
+	];
+
+	return [ hwbH, hwbW, hwbB ];
+}
+
+/*
+
+References
+----------
+
+- https://en.wikipedia.org/wiki/HWB_color_model#Converting_to_and_from_HSV
+
+/* ========================================================================== */

web/node_modules/@csstools/convert-colors/lib/lab-lch.js

@@ -0,0 +1,31 @@
+/* Convert between Lab and XYZ
+/* ========================================================================== */
+
+export function lab2lch(labL, labA, labB) {
+	const [ lchC, lchH ] = [
+		Math.sqrt(Math.pow(labA, 2) + Math.pow(labB, 2)), // convert to chroma
+		Math.atan2(labB, labA) * 180 / Math.PI // convert to hue, in degrees
+	];
+
+	return [ labL, lchC, lchH ];
+}
+
+export function lch2lab(lchL, lchC, lchH) {
+	// convert to Lab a and b from the polar form
+	const [ labA, labB ] = [
+		lchC * Math.cos(lchH * Math.PI / 180),
+		lchC * Math.sin(lchH * Math.PI / 180)
+	];
+
+	return [ lchL, labA, labB ];
+}
+
+/*
+
+References
+----------
+
+- https://www.w3.org/TR/css-color-4/#lch-to-lab
+- https://www.w3.org/TR/css-color-4/#color-conversion-code
+
+/* ========================================================================== */

web/node_modules/@csstools/convert-colors/lib/lab-xyz.js

@@ -0,0 +1,68 @@
+import { epsilon, kappa, wd50X, wd50Y, wd50Z, matrix } from './util';
+
+/* Convert between Lab and XYZ
+/* ========================================================================== */
+
+export function lab2xyz(labL, labA, labB) {
+	// compute f, starting with the luminance-related term
+	const f2 = (labL + 16) / 116;
+	const f1 = labA / 500 + f2;
+	const f3 = f2 - labB / 200;
+
+	// compute pre-scaled XYZ
+	const [ initX, initY, initZ ] = [
+		Math.pow(f1, 3) > epsilon ? Math.pow(f1, 3)                : (116 * f1 - 16) / kappa,
+		labL > kappa * epsilon    ? Math.pow((labL + 16) / 116, 3) : labL / kappa,
+		Math.pow(f3, 3) > epsilon ? Math.pow(f3, 3)                : (116 * f3 - 16) / kappa
+	];
+
+	const [ xyzX, xyzY, xyzZ ] = matrix(
+		// compute XYZ by scaling pre-scaled XYZ by reference white
+		[ initX * wd50X, initY * wd50Y, initZ * wd50Z ],
+		// calculate D65 XYZ from D50 XYZ
+		[
+			[ 0.9555766, -0.0230393,  0.0631636],
+			[-0.0282895,  1.0099416,  0.0210077],
+			[ 0.0122982, -0.0204830,  1.3299098]
+		]
+	);
+
+	return [ xyzX, xyzY, xyzZ ];
+}
+
+export function xyz2lab(xyzX, xyzY, xyzZ) {
+	// calculate D50 XYZ from D65 XYZ
+	const [ d50X, d50Y, d50Z ] = matrix([ xyzX, xyzY, xyzZ ], [
+		[ 1.0478112,  0.0228866, -0.0501270],
+		[ 0.0295424,  0.9904844, -0.0170491],
+		[-0.0092345,  0.0150436,  0.7521316]
+	]);
+
+	// calculate f
+	const [ f1, f2, f3 ] = [
+		d50X / wd50X,
+		d50Y / wd50Y,
+		d50Z / wd50Z
+	].map(
+		value => value > epsilon ? Math.cbrt(value) : (kappa * value + 16) / 116
+	);
+
+	const [ labL, labA, labB ] = [
+		116 * f2 - 16,
+		500 * (f1 - f2),
+		200 * (f2 - f3)
+	];
+
+	return [ labL, labA, labB ];
+}
+
+/*
+
+References
+----------
+
+- https://www.w3.org/TR/css-color-4/#rgb-to-lab
+- https://www.w3.org/TR/css-color-4/#color-conversion-code
+- https://www.easyrgb.com/en/math.php
+
+/* ========================================================================== */

web/node_modules/@csstools/convert-colors/lib/rgb-hsl.js

@@ -0,0 +1,50 @@
+import { rgb2hue, rgb2value, rgb2whiteness, hue2rgb } from './util';
+
+/* Convert between RGB and HSL
+/* ========================================================================== */
+
+export function rgb2hsl(rgbR, rgbG, rgbB, fallbackhue) {
+	const hslH = rgb2hue(rgbR, rgbG, rgbB, fallbackhue);
+	const hslV = rgb2value(rgbR, rgbG, rgbB);
+	const hslW = rgb2whiteness(rgbR, rgbG, rgbB);
+
+	// calculate value/whiteness delta
+	const hslD = hslV - hslW;
+
+	// calculate lightness
+	const hslL = (hslV + hslW) / 2;
+
+	// calculate saturation
+	const hslS = hslD === 0 ? 0 : hslD / (100 - Math.abs(2 * hslL - 100)) * 100;
+
+	return [ hslH, hslS, hslL ];
+}
+
+export function hsl2rgb(hslH, hslS, hslL) {
+	// calcuate t2
+	const t2 = hslL <= 50 ? hslL * (hslS + 100) / 100 : hslL + hslS - hslL * hslS / 100;
+
+	// calcuate t1
+	const t1 = hslL * 2 - t2;
+
+	// calculate rgb
+	const [ rgbR, rgbG, rgbB ] = [
+		hue2rgb(t1, t2, hslH + 120),
+		hue2rgb(t1, t2, hslH),
+		hue2rgb(t1, t2, hslH - 120)
+	];
+
+	return [ rgbR, rgbG, rgbB ];
+}
+
+/*
+
+References
+----------
+
+- https://www.w3.org/TR/css-color-3/#hsl-color
+- https://www.w3.org/TR/css-color-4/#hsl-to-rgb
+- https://www.rapidtables.com/convert/color/rgb-to-hsl.html
+- https://www.rapidtables.com/convert/color/hsl-to-rgb.html
+
+/* ========================================================================== */

web/node_modules/@csstools/convert-colors/lib/rgb-hsv.js

@@ -0,0 +1,47 @@
+import { rgb2value, rgb2whiteness, rgb2hue } from './util';
+
+/* Convert between RGB and HSV
+/* ========================================================================== */
+
+export function rgb2hsv(rgbR, rgbG, rgbB, fallbackhue) {
+	const hsvV = rgb2value(rgbR, rgbG, rgbB);
+	const hsvW = rgb2whiteness(rgbR, rgbG, rgbB);
+	const hsvH = rgb2hue(rgbR, rgbG, rgbB, fallbackhue);
+
+	// calculate saturation
+	const hsvS = hsvV === hsvW ? 0 : (hsvV - hsvW) / hsvV * 100;
+
+	return [ hsvH, hsvS, hsvV ];
+}
+
+export function hsv2rgb(hsvH, hsvS, hsvV) {
+	const rgbI = Math.floor(hsvH / 60);
+
+	// calculate rgb parts
+	const rgbF = hsvH / 60 - rgbI & 1 ? hsvH / 60 - rgbI : 1 - hsvH / 60 - rgbI;
+	const rgbM = hsvV * (100 - hsvS) / 100;
+	const rgbN = hsvV * (100 - hsvS * rgbF) / 100;
+
+	const [ rgbR, rgbG, rgbB ] = rgbI === 5
+		? [ hsvV, rgbM, rgbN ]
+	: rgbI === 4
+		? [ rgbN, rgbM, hsvV ]
+	: rgbI === 3
+		? [ rgbM, rgbN, hsvV ]
+	: rgbI === 2
+		? [ rgbM, hsvV, rgbN ]
+	: rgbI === 1
+		? [ rgbN, hsvV, rgbM ]
+	: [ hsvV, rgbN, rgbM ];
+
+	return [ rgbR, rgbG, rgbB ];
+}
+
+/*
+
+References
+----------
+
+- http://alvyray.com/Papers/CG/hsv2rgb.htm
+
+/* ========================================================================== */

web/node_modules/@csstools/convert-colors/lib/rgb-hwb.js

@@ -0,0 +1,32 @@
+import { rgb2hue, rgb2whiteness, rgb2value } from './util';
+import { hsl2rgb } from './rgb-hsl';
+
+/* Convert between RGB and HWB
+/* ========================================================================== */
+
+export function rgb2hwb(rgbR, rgbG, rgbB, fallbackhue) {
+	const hwbH = rgb2hue(rgbR, rgbG, rgbB, fallbackhue);
+	const hwbW = rgb2whiteness(rgbR, rgbG, rgbB);
+	const hwbV = rgb2value(rgbR, rgbG, rgbB);
+	const hwbB = 100 - hwbV;
+
+	return [hwbH, hwbW, hwbB];
+}
+
+export function hwb2rgb(hwbH, hwbW, hwbB, fallbackhue) {
+	const [ rgbR, rgbG, rgbB ] = hsl2rgb(hwbH, 100, 50, fallbackhue).map(
+		v => v * (100 - hwbW - hwbB) / 100 + hwbW
+	);
+
+	return [ rgbR, rgbG, rgbB ];
+}
+
+/*
+
+References
+----------
+
+- https://www.w3.org/TR/css-color-4/#hwb-to-rgb
+- http://alvyray.com/Papers/CG/hwb2rgb.htm
+
+/* ========================================================================== */

web/node_modules/@csstools/convert-colors/lib/rgb-xyz.js

@@ -0,0 +1,42 @@
+import { matrix } from './util';
+
+/* Convert between RGB and XYZ
+/* ========================================================================== */
+
+export function rgb2xyz(rgbR, rgbG, rgbB) {
+	const [ lrgbR, lrgbB, lrgbG ] = [ rgbR, rgbG, rgbB ].map(
+		v => v > 4.045 ? Math.pow((v + 5.5) / 105.5, 2.4) * 100 : v / 12.92
+	);
+
+	const [ xyzX, xyzY, xyzZ ] = matrix([ lrgbR, lrgbB, lrgbG ], [
+		[0.4124564, 0.3575761, 0.1804375],
+		[0.2126729, 0.7151522, 0.0721750],
+		[0.0193339, 0.1191920, 0.9503041]
+	]);
+
+	return [ xyzX, xyzY, xyzZ ];
+}
+
+export function xyz2rgb(xyzX, xyzY, xyzZ) {
+	const [ lrgbR, lrgbB, lrgbG ] = matrix([ xyzX, xyzY, xyzZ ], [
+		[ 3.2404542, -1.5371385, -0.4985314],
+		[-0.9692660,  1.8760108,  0.0415560],
+		[ 0.0556434, -0.2040259,  1.0572252]
+	]);
+
+	const [ rgbR, rgbG, rgbB ] = [ lrgbR, lrgbB, lrgbG ].map(
+		v => v > 0.31308 ? 1.055 * Math.pow(v / 100, 1 / 2.4) * 100 - 5.5 : 12.92 * v
+	);
+
+	return [ rgbR, rgbG, rgbB ];
+}
+
+/*
+
+References
+----------
+
+- https://www.w3.org/TR/css-color-4/#rgb-to-lab
+- https://www.w3.org/TR/css-color-4/#color-conversion-code
+
+/* ========================================================================== */

web/node_modules/@csstools/convert-colors/lib/util.js

@@ -0,0 +1,87 @@
+/* Convert between RGB and Hue
+/* ========================================================================== */
+
+export function rgb2hue(rgbR, rgbG, rgbB, fallbackhue = 0) {
+	const value     = rgb2value(rgbR, rgbG, rgbB);
+	const whiteness = rgb2whiteness(rgbR, rgbG, rgbB);
+	const delta     = value - whiteness;
+
+	if (delta) {
+		// calculate segment
+		const segment = value === rgbR
+			? (rgbG - rgbB) / delta
+		: value === rgbG
+			? (rgbB - rgbR) / delta
+		: (rgbR - rgbG) / delta;
+
+		// calculate shift
+		const shift = value === rgbR
+			? segment < 0
+				? 360 / 60
+				: 0 / 60
+		: value === rgbG
+			? 120 / 60
+		: 240 / 60;
+
+		// calculate hue
+		const hue = (segment + shift) * 60;
+
+		return hue;
+	} else {
+		// otherwise return the fallback hue
+		return fallbackhue;
+	}
+}
+
+export function hue2rgb(t1, t2, hue) {
+	// calculate the ranged hue
+	const rhue = hue < 0 ? hue + 360 : hue > 360 ? hue - 360 : hue;
+
+	// calculate the rgb value
+	const rgb = rhue * 6 < 360
+		? t1 + (t2 - t1) * rhue / 60
+	: rhue * 2 < 360
+		? t2
+	: rhue * 3 < 720
+		? t1 + (t2 - t1) * (240 - rhue) / 60
+	: t1;
+
+	return rgb;
+}
+
+/* RGB tooling
+/* ========================================================================== */
+
+export function rgb2value(rgbR, rgbG, rgbB) {
+	const value = Math.max(rgbR, rgbG, rgbB);
+
+	return value;
+}
+
+export function rgb2whiteness(rgbR, rgbG, rgbB) {
+	const whiteness = Math.min(rgbR, rgbG, rgbB);
+
+	return whiteness;
+}
+
+/* Math matrix
+/* ========================================================================== */
+
+export function matrix(params, mats) {
+	return mats.map(mat => mat.reduce((acc, value, index) => acc + params[index] * value, 0));
+}
+
+/* D50 reference white
+/* ========================================================================== */
+
+export const [ wd50X, wd50Y, wd50Z ] = [ 96.42, 100, 82.49 ];
+
+/* Epsilon
+/* ========================================================================== */
+
+export const epsilon = Math.pow(6, 3) / Math.pow(29, 3);
+
+/* Kappa
+/* ========================================================================== */
+
+export const kappa = Math.pow(29, 3) / Math.pow(3, 3);

web/node_modules/@csstools/convert-colors/package.json

@@ -0,0 +1,70 @@
+{
+  "name": "@csstools/convert-colors",
+  "version": "1.4.0",
+  "description": "Convert colors between RGB, HSL, and HWB",
+  "author": "Jonathan Neal <jonathantneal@hotmail.com>",
+  "license": "CC0-1.0",
+  "repository": "jonathantneal/convert-colors",
+  "homepage": "https://github.com/jonathantneal/convert-colors#readme",
+  "bugs": "https://github.com/jonathantneal/convert-colors/issues",
+  "main": "index.bundle.js",
+  "module": "index.js",
+  "files": [
+    "index.js",
+    "index.bundle.js",
+    "lib"
+  ],
+  "scripts": {
+    "prepublishOnly": "npm test",
+    "pretest": "rollup -c .rollup.js --silent",
+    "test": "echo 'Running tests...'; npm run test:ec && npm run test:js && npm run test:tape",
+    "test:ec": "echint test",
+    "test:js": "eslint *.js --cache --ignore-path .gitignore --quiet",
+    "test:tape": "node .tape"
+  },
+  "engines": {
+    "node": ">=4.0.0"
+  },
+  "devDependencies": {
+    "babel-core": "^6.26.0",
+    "babel-preset-env": "^1.6",
+    "echint": "^4.0",
+    "eslint": "^4.15",
+    "eslint-config-dev": "2.0",
+    "pre-commit": "^1.2",
+    "rollup": "^0.54",
+    "rollup-plugin-babel": "^3.0"
+  },
+  "eslintConfig": {
+    "extends": "dev",
+    "rules": {
+      "max-params": [
+        2,
+        4
+      ]
+    }
+  },
+  "keywords": [
+    "colors",
+    "converts",
+    "conversions",
+    "converting",
+    "css",
+    "rgb",
+    "hsl",
+    "hwb",
+    "lab",
+    "lch",
+    "hsv",
+    "xyz",
+    "red",
+    "green",
+    "blue",
+    "hue",
+    "saturation",
+    "lightness",
+    "whiteness",
+    "blackness",
+    "cie"
+  ]
+}

web/node_modules/@csstools/normalize.css/CHANGELOG.md

@@ -0,0 +1,247 @@
+# Changes to @csstools/normalize.css
+
+### 10.1.0 (June 3, 2019)
+
+- Fixed: `Edge` comments without `Chrome` are are changed to `Edge 18-`.
+- Fixed: `Chrome` comments without `Edge` have `Edge` added.
+- Fixed: Nested list `dl` normalizations split.
+- Fixed: Logical `margin-block` normalization changed to `margin`.
+
+### 10.0.0 (May 16, 2019)
+
+- Added: Removal of the margin on nested lists in Chrome and Safari.
+- Added: opinionated.css, normalize.css with classic opinionated styles.
+- Changed: Reverted license to prehistory state, or CC0-1.0 as intended.
+
+> There are now 2 versions of normalize.css. Nicolas Gallagher and I started
+> writing normalize.css together. I named and created the normalize.css
+> repository with the help of Paul Irish and Ben Alman. I transferred the
+> repository to Necolas, who made it into a “household” CSS library. Much
+> later I resumed management of normalize.css with Luciano Battagliero. We
+> tagged, deprecated, and removed “opinionated” styles — styles developers
+> often prefer but which do not fix bugs or “normalize” browser differences.
+> Necolas disagreed with this change, and resolved the matter AFAIK by removing
+> all of the other contributors, locking discussion threads, wiping my name
+> (and his) from all files, and blocking me from being able to follow the
+> project.
+>
+> I may later create a new project with a new name, but for now I intend to
+> continue working on the normalize.css project, sometimes under the
+> “csstools” tag. I hope one day our differences are resolved and the projects
+> will be one again.
+>
+> For reference within this project:
+> normalize.css resolves bugs and common browser inconsistencies.
+> opinionated.css does the same while preserving the classic opinionated styles.
+
+---
+
+### 9.0.1 (September 4, 2018)
+
+- Changed: Restored `::-moz-focus-inner` and `:-moz-focusring` normalizations
+  confirmed necessary in Firefox 61.
+- Changed: Sorted the `::-webkit-inner-spin-button` and
+  `::-webkit-outer-spin-button` pseudo-class selectors.
+- Updated: Tests.
+
+### 9.0.0 (August 22, 2018)
+
+- Fixed: Cursor style of increment and decrement buttons in Safari, not Chrome.
+- Fixed: Text style of placeholders in Chrome, Edge, and Safari.
+- Removed: unnecessary form control margin normalizations in Firefox.
+- Removed: opinionated fieldset padding in all browsers.
+- Removed: `::-moz-focus-inner` and `:-moz-focusring` normalizations fixed in
+  Firefox 53 https://bugzilla.mozilla.org/show_bug.cgi?id=140562
+
+---
+
+### 8.0.0 (June 15, 2018)
+
+- Removed: Normalizations for unsupported browsers, such as Android 4-,
+  Chrome 57-, Firefox 52-, IE 8-, and Safari 7-.
+- Removed: Removal of gaps on link underlines in iOS and Safari.
+- Changed: Selector weight on form control normalizations.
+- Removed: Removal of search input cancel button in Chrome and Safari.
+- Added: Dialog styles for Edge, IE, and Safari.
+- Added: Tests for every single feature.
+- Updated: Documentation to be more clear and helpful.
+
+---
+
+### 7.0.0 (May 26, 2017)
+
+- Changed: Separated out selector targeted fixes for readability.
+- Updated: Browser landscape of abbr[title] fixes.
+- Updated: Browser landscape of details fixes.
+- Fixed: Browser landscape of displays.
+- Removed: Opinionated changes on sub and sup elements.
+
+---
+
+### 6.0.0 (March 26, 2017)
+
+- Removed: All opinionated rules.
+- Fixed: Document heading comment.
+- Updated: Support for `abbr[title]`.
+
+> At the time of this writing, for anyone who still wants/needs the opinionated
+> rules, see [opinionate.css](https://github.com/adamgruber/opinionate.css)_.
+
+---
+
+### 5.0.0 (October 3, 2016)
+
+- Added: Normalized sections not already present from
+  https://html.spec.whatwg.org/multipage/.
+- Removed: `::placeholder` styles due to a bug in Edge.
+- Removed: `optgroup` normalization needed by the previous font reset.
+- Changed: Moved unsorted rules into their respective sections.
+- Changed: Explicitly defined font resets on form controls.
+- Updated: `summary` style in all browsers.
+- Updated: Text-size-adjust documentation
 for IE on Windows Phone
+- Updated: OS X reference to macOS
+- Updated: Semver strategy.
+
+---
+
+### 4.2.0 (June 30, 2016)
+
+- Fixed: `line-height` in all browsers.
+- Fixed: `optgroup` font inheritance.
+- Updated: Project heading.
+
+### 4.1.1 (April 12, 2016)
+
+- Updated: Project heading.
+
+### 4.1.0 (April 11, 2016)
+
+- Added: Normalized placeholders in Chrome, Edge, and Safari.
+- Added: Normalized `text-decoration-skip` property in Safari.
+- Added: Normalized file select buttons.
+- Added: Normalized search input outlines in Safari.
+- Removed: Opinionated cursor styles on buttons.
+- Changed: Limited Firefox focus normalizations to buttons.
+- Changed: Restored `main` to package.json.
+- Changed: Restored proper overflow to certain `select` elements.
+- Updated: Stylelint configuration.
+- Updated: Tests.
+
+### 4.0.0 (March 19, 2016)
+
+- Added: Correct font weight for `b` and `strong` in Chrome, Edge, and Safari.
+- Removed: Unnecessary normalization of `line-height` for `input`.
+- Removed: Unnecessary normalization of `color` for form controls.
+- Removed: Unnecessary `box-sizing` for `input[type="search"]` in Chrome, Edge,
+  Firefox, IE, and Safari.
+- Removed: Opinionated table resets.
+- Removed: Opinionated `pre` overflow.
+- Removed: Selector weight from some input selectors.
+- Updated: Normalization of `border-style` for `img`.
+- Updated: Normalization of `color` inheritance for `legend`.
+- Updated: Normalization of `background-color` for `mark`.
+- Updated: Normalization of `outline` for `:-moz-focusring` removed by a
+  previous Normalization in Firefox.
+- Updated: Opinionated style of `outline-width` for `a:active` and `a:hover`.
+- Updated: Comments to identify opinionated styles.
+- Updated: Comments to specify browser/versions affected by all changes.
+- Updated: Comments to use one voice.
+- Fixed: inconsistent `overflow` for `hr` in Edge and IE.
+- Fixed: inconsistent `box-sizing` for `hr` in Firefox.
+- Fixed: inconsistent `text-decoration` and `border-bottom` for `abbr[title]`
+  in Chrome, Edge, Firefox IE, Opera, and Safari.
+- Fixed: inheritance and scaling of `font-size` for preformatted text.
+- Fixed: `legend` text wrapping not present in Edge and IE.
+
+---
+
+### 3.0.3 (March 30, 2015)
+
+- Added: `main` property.
+- Removed: Unnecessary vendor prefixes.
+
+### 3.0.2 (October 4, 2014)
+
+- Added: `menu` element to HTML5 display definitions.
+- Changed: alter `background-color` of links in IE 10.
+
+### 3.0.1 (March 27, 2014)
+
+- Added: package.json for npm support.
+
+### 3.0.0 (January 28, 2014)
+
+### 3.0.0-rc.1 (January 26, 2014)
+
+- Added: Explicit tests for each normalization.
+- Added: Normalizations for `optgroup`.
+- Added: Display for `progress` in IE 8/9.
+- Removed: `textarea` alignment modification.
+- Removed: `a:focus` outline normalization.
+- Removed: default table cell padding.
+- Fixed: i18n for `q` element.
+- Fixed: `pre` text formatting and overflow.
+- Fixed: Vertical alignment of `progress`.
+- Fixed: `button` overflow in IE 8/9/10.
+- Fixed: number input button cursor in Chrome on OS X.
+- Fixed: `figure` margin normalization.
+- Fixed: `font` and `color` inheritance for forms.
+
+---
+
+### 2.1.3 (August 26, 2013)
+
+- Fixed: component.json.
+- Removed: the gray background color from active links in IE 10.
+
+### 2.1.2 (May 11, 2013)
+
+- Changed: Reverted root `color` and `background` normalizations.
+
+### 2.1.1 (April 8, 2013)
+
+- Added: root `color` and `background` normalizations to counter the effects of
+- system color schemes.
+
+### 2.1.0 (January 21, 2013)
+
+- Added: Normalization of `text-transform` for `button` and `select`.
+- Added: Normalization of `h1` margin when within HTML5 sectioning elements.
+- Added: Normalization of `hr` element.
+- Added: `main` element to HTML5 display definitions.
+- Removed: unnecessary `pre` styles.
+- Fixed: cursor style for disabled button `input`.
+
+### 2.0.1 (August 20, 2012)
+
+- Removed: stray IE 6/7 `inline-block` hack from HTML5 display settings.
+
+### 2.0.0 (August 19, 2012)
+
+- Removed: Legacy browser form normalizations.
+- Removed: List normalizations.
+- Removed: heading normalizations except `h1` font size.
+- Removed: Support for IE 6/7, Firefox < 4, and Safari < 5.
+- Added: `quotes` normalizations.
+- Changed: Form elements automatically inherit `font-family` from ancestor.
+
+---
+
+### 1.0.1 (August 19, 2012)
+
+- Changed: Adjusted `small` font size normalization.
+
+### 1.0.0 (August 14, 2012)
+
+- Added: MIT License.
+- Added: Hide `audio` elements without controls in iOS 5.
+- Added: Heading margins and font size.
+- Removed: scrollbar normalization.
+- Removed: excess padding from checkbox and radio inputs in IE 7.
+- Changed: Moved font-family normalization from `body` to `html`.
+- Added: IE9 correction for SVG overflow.
+- Added: Fix for legend not inheriting color in IE 6/7/8/9.
+
+### Prehistory
+
+- Initial version

web/node_modules/@csstools/normalize.css/LICENSE.md

@@ -0,0 +1,108 @@
+# CC0 1.0 Universal
+
+## Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
+exclusive Copyright and Related Rights (defined below) upon the creator and
+subsequent owner(s) (each and all, an “owner”) of an original work of
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+
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+redistribute as freely as possible in any form whatsoever and for any purposes,
+including without limitation commercial purposes. These owners may contribute
+to the Commons to promote the ideal of a free culture and the further
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+
+For these and/or other purposes and motivations, and without any expectation of
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+
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+   7. other similar, equivalent or corresponding rights throughout the world
+      based on applicable law or treaty, and any national implementations
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+
+2. Waiver. To the greatest extent permitted by, but not in contravention of,
+   applicable law, Affirmer hereby overtly, fully, permanently, irrevocably and
+   unconditionally waives, abandons, and surrenders all of Affirmer’s Copyright
+   and Related Rights and associated claims and causes of action, whether now
+   known or unknown (including existing as well as future claims and causes of
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+   makes the Waiver for the benefit of each member of the public at large and
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+   such Waiver shall not be subject to revocation, rescission, cancellation,
+   termination, or any other legal or equitable action to disrupt the quiet
+   enjoyment of the Work by the public as contemplated by Affirmer’s express
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+
+3. Public License Fallback. Should any part of the Waiver for any reason be
+   judged legally invalid or ineffective under applicable law, then the Waiver
+   shall be preserved to the maximum extent permitted taking into account
+   Affirmer’s express Statement of Purpose. In addition, to the extent the
+   Waiver is so judged Affirmer hereby grants to each affected person a
+   royalty-free, non transferable, non sublicensable, non exclusive,
+   irrevocable and unconditional license to exercise Affirmer’s Copyright and
+   Related Rights in the Work (i) in all territories worldwide, (ii) for the
+   maximum duration provided by applicable law or treaty (including future time
+   extensions), (iii) in any current or future medium and for any number of
+   copies, and (iv) for any purpose whatsoever, including without limitation
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+   shall be deemed effective as of the date CC0 was applied by Affirmer to the
+   Work. Should any part of the License for any reason be judged legally
+   invalid or ineffective under applicable law, such partial invalidity or
+   ineffectiveness shall not invalidate the remainder of the License, and in
+   such case Affirmer hereby affirms that he or she will not (i) exercise any
+   of his or her remaining Copyright and Related Rights in the Work or (ii)
+   assert any associated claims and causes of action with respect to the Work,
+   in either case contrary to Affirmer’s express Statement of Purpose.
+
+4. Limitations and Disclaimers.
+   1. No trademark or patent rights held by Affirmer are waived, abandoned,
+      surrendered, licensed or otherwise affected by this document.
+   2. Affirmer offers the Work as-is and makes no representations or warranties
+      of any kind concerning the Work, express, implied, statutory or
+      otherwise, including without limitation warranties of title,
+      merchantability, fitness for a particular purpose, non infringement, or
+      the absence of latent or other defects, accuracy, or the present or
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+   3. Affirmer disclaims responsibility for clearing rights of other persons
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+      Further, Affirmer disclaims responsibility for obtaining any necessary
+      consents, permissions or other rights required for any use of the Work.
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+
+For more information, please see
+http://creativecommons.org/publicdomain/zero/1.0/.

web/node_modules/@csstools/normalize.css/README.md

@@ -0,0 +1,91 @@
+# @csstools/normalize.css [<img src="https://csstools.github.io/normalize.css/logo.svg" alt="normalize" width="90" height="90" align="right">][@csstools/normalize.css]
+
+[@csstools/normalize.css] is a CSS library that provides consistent,
+cross-browser default styling of HTML elements.
+
+## Usage
+
+```html
+<link href="https://unpkg.com/@csstools/normalize.css" rel="stylesheet" />
+```
+
+### Install
+
+```sh
+npm install --save @csstools/normalize.css
+```
+
+#### Webpack Usage
+
+Import [@csstools/normalize.css] in CSS:
+
+```css
+@import '~@csstools/normalize.css';
+```
+
+Alternatively, import [@csstools/normalize.css] in JS:
+
+```js
+import '@csstools/normalize.css';
+```
+
+In `webpack.config.js`, use the appropriate loaders:
+
+```js
+module.exports = {
+  module: {
+    rules: [
+      {
+        test: /\.css$/,
+        use: [ 'style-loader', 'css-loader' ]
+      }
+    ]
+  }
+}
+```
+
+**Download**
+
+See https://csstools.github.io/normalize.css/latest/normalize.css
+
+## What does it do?
+
+* Normalizes styles for a wide range of elements.
+* Corrects bugs and common browser inconsistencies.
+* Explains what code does using detailed comments.
+
+## Browser support
+
+* Chrome (last 3)
+* Edge (last 3)
+* Firefox (last 3)
+* Firefox ESR
+* Opera (last 3)
+* Safari (last 3)
+* iOS Safari (last 2)
+* Internet Explorer 9+
+
+## Contributing
+
+Please read the [contribution guidelines](CONTRIBUTING.md) in order to make the
+contribution process easy and effective for everyone involved.
+
+## Similar Projects
+
+- [opinionate.css](https://github.com/adamgruber/opinionate.css) - A supplement
+to normalize.css with opinionated rules.
+- [sanitize.css](https://github.com/csstools/sanitize.css) - An alternative to
+normalize.css, adhering to common developer expectations and preferences
+- [remedy.css](https://github.com/mozdevs/cssremedy) - An alternative to
+normalize.css, adhering to different common developer expectations and
+preferences.
+- [modern-normalize.css](https://github.com/csstools/sanitize.css) - An
+alternative to normalize.css, adhering to a minimal set of normalizations and
+common developer expectations and preferences.
+
+## Acknowledgements
+
+normalize.css is a project by [Jonathan Neal](https://github.com/jonathantneal),
+co-created with [Nicolas Gallagher](https://github.com/necolas).
+
+[@csstools/normalize.css]: https://github.com/csstools/normalize.css

web/node_modules/@csstools/normalize.css/normalize.css

@@ -0,0 +1,416 @@
+/* Document
+ * ========================================================================== */
+
+/**
+ * 1. Correct the line height in all browsers.
+ * 2. Prevent adjustments of font size after orientation changes in
+ *    IE on Windows Phone and in iOS.
+ */
+
+html {
+  line-height: 1.15; /* 1 */
+  -ms-text-size-adjust: 100%; /* 2 */
+  -webkit-text-size-adjust: 100%; /* 2 */
+}
+
+/* Sections
+ * ========================================================================== */
+
+/**
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Edge, Firefox, and Safari.
+ */
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+/* Grouping content
+ * ========================================================================== */
+
+/**
+ * Remove the margin on nested lists in Chrome, Edge, IE, and Safari.
+ */
+
+dl dl,
+dl ol,
+dl ul,
+ol dl,
+ul dl {
+  margin: 0;
+}
+
+/**
+ * Remove the margin on nested lists in Edge 18- and IE.
+ */
+
+ol ol,
+ol ul,
+ul ol,
+ul ul {
+  margin: 0;
+}
+
+/**
+ * 1. Add the correct box sizing in Firefox.
+ * 2. Show the overflow in Edge 18- and IE.
+ */
+
+hr {
+  box-sizing: content-box; /* 1 */
+  height: 0; /* 1 */
+  overflow: visible; /* 2 */
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+main {
+  display: block;
+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+pre {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+/* Text-level semantics
+ * ========================================================================== */
+
+/**
+ * Remove the gray background on active links in IE 10.
+ */
+
+a {
+  background-color: transparent;
+}
+
+/**
+ * Add the correct text decoration in Edge 18-, IE, and Safari.
+ */
+
+abbr[title] {
+  text-decoration: underline;
+  text-decoration: underline dotted;
+}
+
+/**
+ * Add the correct font weight in Chrome, Edge, and Safari.
+ */
+
+b,
+strong {
+  font-weight: bolder;
+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+code,
+kbd,
+samp {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+/**
+ * Add the correct font size in all browsers.
+ */
+
+small {
+  font-size: 80%;
+}
+
+/* Embedded content
+ * ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+audio,
+video {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
+/**
+ * Remove the border on images within links in IE 10-.
+ */
+
+img {
+  border-style: none;
+}
+
+/**
+ * Hide the overflow in IE.
+ */
+
+svg:not(:root) {
+  overflow: hidden;
+}
+
+/* Forms
+ * ========================================================================== */
+
+/**
+ * Remove the margin on controls in Safari.
+ */
+
+button,
+input,
+select {
+  margin: 0;
+}
+
+/**
+ * 1. Show the overflow in IE.
+ * 2. Remove the inheritance of text transform in Edge 18-, Firefox, and IE.
+ */
+
+button {
+  overflow: visible; /* 1 */
+  text-transform: none; /* 2 */
+}
+
+/**
+ * Correct the inability to style buttons in iOS and Safari.
+ */
+
+button,
+[type="button"],
+[type="reset"],
+[type="submit"] {
+  -webkit-appearance: button;
+}
+
+/**
+ * Correct the padding in Firefox.
+ */
+
+fieldset {
+  padding: 0.35em 0.75em 0.625em;
+}
+
+/**
+ * Show the overflow in Edge 18- and IE.
+ */
+
+input {
+  overflow: visible;
+}
+
+/**
+ * 1. Correct the text wrapping in Edge 18- and IE.
+ * 2. Correct the color inheritance from `fieldset` elements in IE.
+ */
+
+legend {
+  box-sizing: border-box; /* 1 */
+  color: inherit; /* 2 */
+  display: table; /* 1 */
+  max-width: 100%; /* 1 */
+  white-space: normal; /* 1 */
+}
+
+/**
+ * 1. Add the correct display in Edge 18- and IE.
+ * 2. Add the correct vertical alignment in Chrome, Edge, and Firefox.
+ */
+
+progress {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
+/**
+ * Remove the inheritance of text transform in Firefox.
+ */
+
+select {
+  text-transform: none;
+}
+
+/**
+ * 1. Remove the margin in Firefox and Safari.
+ * 2. Remove the default vertical scrollbar in IE.
+ */
+
+textarea {
+  margin: 0; /* 1 */
+  overflow: auto; /* 2 */
+}
+
+/**
+ * 1. Add the correct box sizing in IE 10-.
+ * 2. Remove the padding in IE 10-.
+ */
+
+[type="checkbox"],
+[type="radio"] {
+  box-sizing: border-box; /* 1 */
+  padding: 0; /* 2 */
+}
+
+/**
+ * 1. Correct the odd appearance in Chrome, Edge, and Safari.
+ * 2. Correct the outline style in Safari.
+ */
+
+[type="search"] {
+  -webkit-appearance: textfield; /* 1 */
+  outline-offset: -2px; /* 2 */
+}
+
+/**
+ * Correct the cursor style of increment and decrement buttons in Safari.
+ */
+
+::-webkit-inner-spin-button,
+::-webkit-outer-spin-button {
+  height: auto;
+}
+
+/**
+ * Correct the text style of placeholders in Chrome, Edge, and Safari.
+ */
+
+::-webkit-input-placeholder {
+  color: inherit;
+  opacity: 0.54;
+}
+
+/**
+ * Remove the inner padding in Chrome, Edge, and Safari on macOS.
+ */
+
+::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+/**
+ * 1. Correct the inability to style upload buttons in iOS and Safari.
+ * 2. Change font properties to `inherit` in Safari.
+ */
+
+::-webkit-file-upload-button {
+  -webkit-appearance: button; /* 1 */
+  font: inherit; /* 2 */
+}
+
+/**
+ * Remove the inner border and padding of focus outlines in Firefox.
+ */
+
+::-moz-focus-inner {
+  border-style: none;
+  padding: 0;
+}
+
+/**
+ * Restore the focus outline styles unset by the previous rule in Firefox.
+ */
+
+:-moz-focusring {
+  outline: 1px dotted ButtonText;
+}
+
+/**
+ * Remove the additional :invalid styles in Firefox.
+ */
+
+:-moz-ui-invalid {
+  box-shadow: none;
+}
+
+/* Interactive
+ * ========================================================================== */
+
+/*
+ * Add the correct display in Edge 18- and IE.
+ */
+
+details {
+  display: block;
+}
+
+/*
+ * Add the correct styles in Edge 18-, IE, and Safari.
+ */
+
+dialog {
+  background-color: white;
+  border: solid;
+  color: black;
+  display: block;
+  height: -moz-fit-content;
+  height: -webkit-fit-content;
+  height: fit-content;
+  left: 0;
+  margin: auto;
+  padding: 1em;
+  position: absolute;
+  right: 0;
+  width: -moz-fit-content;
+  width: -webkit-fit-content;
+  width: fit-content;
+}
+
+dialog:not([open]) {
+  display: none;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Scripting
+ * ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+canvas {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+template {
+  display: none;
+}
+
+/* User interaction
+ * ========================================================================== */
+
+/**
+ * Add the correct display in IE 10-.
+ */
+
+[hidden] {
+  display: none;
+}

web/node_modules/@csstools/normalize.css/opinionated.css

@@ -0,0 +1,428 @@
+/* Document
+ * ========================================================================== */
+
+/**
+ * 1. Correct the line height in all browsers.
+ * 2. Prevent adjustments of font size after orientation changes in
+ *    IE on Windows Phone and in iOS.
+ */
+
+html {
+  line-height: 1.15; /* 1 */
+  -ms-text-size-adjust: 100%; /* 2 */
+  -webkit-text-size-adjust: 100%; /* 2 */
+}
+
+/* Sections
+ * ========================================================================== */
+
+/**
+ * Remove the margin in all browsers. (opinionated)
+ */
+
+body {
+  margin: 0;
+}
+
+/**
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Edge, Firefox, and Safari.
+ */
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+/* Grouping content
+ * ========================================================================== */
+
+/**
+ * Remove the margin on nested lists in Chrome, Edge, IE, and Safari.
+ */
+
+dl dl,
+dl ol,
+dl ul,
+ol dl,
+ul dl {
+  margin: 0;
+}
+
+/**
+ * Remove the margin on nested lists in Edge 18- and IE.
+ */
+
+ol ol,
+ol ul,
+ul ol,
+ul ul {
+  margin: 0;
+}
+
+/**
+ * 1. Add the correct box sizing in Firefox.
+ * 2. Show the overflow in Edge 18- and IE.
+ */
+
+hr {
+  box-sizing: content-box; /* 1 */
+  height: 0; /* 1 */
+  overflow: visible; /* 2 */
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+main {
+  display: block;
+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+pre {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+/* Text-level semantics
+ * ========================================================================== */
+
+/**
+ * Remove the gray background on active links in IE 10.
+ */
+
+a {
+  background-color: transparent;
+}
+
+/**
+ * Add the correct text decoration in Edge 18-, IE, and Safari.
+ */
+
+abbr[title] {
+  text-decoration: underline;
+  text-decoration: underline dotted;
+}
+
+/**
+ * Add the correct font weight in Chrome, Edge, and Safari.
+ */
+
+b,
+strong {
+  font-weight: bolder;
+}
+
+/**
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
+ */
+
+code,
+kbd,
+samp {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
+}
+
+/**
+ * Add the correct font size in all browsers.
+ */
+
+small {
+  font-size: 80%;
+}
+
+/* Embedded content
+ * ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+audio,
+video {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in iOS 4-7.
+ */
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
+/**
+ * Remove the border on images within links in IE 10-.
+ */
+
+img {
+  border-style: none;
+}
+
+/**
+ * Hide the overflow in IE.
+ */
+
+svg:not(:root) {
+  overflow: hidden;
+}
+
+/* Forms
+ * ========================================================================== */
+
+/**
+ * Remove the margin on controls in Safari.
+ */
+
+button,
+input,
+select {
+  margin: 0;
+}
+
+/**
+ * 1. Show the overflow in IE.
+ * 2. Remove the inheritance of text transform in Edge 18-, Firefox, and IE.
+ */
+
+button {
+  overflow: visible; /* 1 */
+  text-transform: none; /* 2 */
+}
+
+/**
+ * Correct the inability to style buttons in iOS and Safari.
+ */
+
+button,
+[type="button"],
+[type="reset"],
+[type="submit"] {
+  -webkit-appearance: button;
+}
+
+/**
+ * Correct the padding in Firefox.
+ */
+
+fieldset {
+  padding: 0.35em 0.75em 0.625em;
+}
+
+/**
+ * Show the overflow in Edge 18- and IE.
+ */
+
+input {
+  overflow: visible;
+}
+
+/**
+ * 1. Correct the text wrapping in Edge 18- and IE.
+ * 2. Correct the color inheritance from `fieldset` elements in IE.
+ */
+
+legend {
+  box-sizing: border-box; /* 1 */
+  color: inherit; /* 2 */
+  display: table; /* 1 */
+  max-width: 100%; /* 1 */
+  white-space: normal; /* 1 */
+}
+
+/**
+ * 1. Add the correct display in Edge 18- and IE.
+ * 2. Add the correct vertical alignment in Chrome, Edge, and Firefox.
+ */
+
+progress {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
+/**
+ * Remove the inheritance of text transform in Firefox.
+ */
+
+select {
+  text-transform: none;
+}
+
+/**
+ * 1. Change the font styles in all browsers (opinionated).
+ * 2. Remove the margin in Firefox and Safari.
+ * 3. Remove the default vertical scrollbar in IE.
+ */
+
+textarea {
+  font-family: inherit; /* 1 */
+  font-size: 100%; /* 1 */
+  line-height: 1.15; /* 1 */
+  margin: 0; /* 2 */
+  overflow: auto; /* 3 */
+}
+
+/**
+ * 1. Add the correct box sizing in IE 10-.
+ * 2. Remove the padding in IE 10-.
+ */
+
+[type="checkbox"],
+[type="radio"] {
+  box-sizing: border-box; /* 1 */
+  padding: 0; /* 2 */
+}
+
+/**
+ * 1. Correct the odd appearance in Chrome, Edge, and Safari.
+ * 2. Correct the outline style in Safari.
+ */
+
+[type="search"] {
+  -webkit-appearance: textfield; /* 1 */
+  outline-offset: -2px; /* 2 */
+}
+
+/**
+ * Correct the cursor style of increment and decrement buttons in Safari.
+ */
+
+::-webkit-inner-spin-button,
+::-webkit-outer-spin-button {
+  height: auto;
+}
+
+/**
+ * Correct the text style of placeholders in Chrome, Edge, and Safari.
+ */
+
+::-webkit-input-placeholder {
+  color: inherit;
+  opacity: 0.54;
+}
+
+/**
+ * Remove the inner padding in Chrome, Edge, and Safari on macOS.
+ */
+
+::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+/**
+ * 1. Correct the inability to style upload buttons in iOS and Safari.
+ * 2. Change font properties to `inherit` in Safari.
+ */
+
+::-webkit-file-upload-button {
+  -webkit-appearance: button; /* 1 */
+  font: inherit; /* 2 */
+}
+
+/**
+ * Remove the inner border and padding of focus outlines in Firefox.
+ */
+
+::-moz-focus-inner {
+  border-style: none;
+  padding: 0;
+}
+
+/**
+ * Restore the focus outline styles unset by the previous rule in Firefox.
+ */
+
+:-moz-focusring {
+  outline: 1px dotted ButtonText;
+}
+
+/**
+ * Remove the additional :invalid styles in Firefox.
+ */
+
+:-moz-ui-invalid {
+  box-shadow: none;
+}
+
+/* Interactive
+ * ========================================================================== */
+
+/*
+ * Add the correct display in Edge 18- and IE.
+ */
+
+details {
+  display: block;
+}
+
+/*
+ * Add the correct styles in Edge 18-, IE, and Safari.
+ */
+
+dialog {
+  background-color: white;
+  border: solid;
+  color: black;
+  display: block;
+  height: -moz-fit-content;
+  height: -webkit-fit-content;
+  height: fit-content;
+  left: 0;
+  margin: auto;
+  padding: 1em;
+  position: absolute;
+  right: 0;
+  width: -moz-fit-content;
+  width: -webkit-fit-content;
+  width: fit-content;
+}
+
+dialog:not([open]) {
+  display: none;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Scripting
+ * ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+canvas {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+template {
+  display: none;
+}
+
+/* User interaction
+ * ========================================================================== */
+
+/**
+ * Add the correct display in IE 10-.
+ */
+
+[hidden] {
+  display: none;
+}

web/node_modules/@csstools/normalize.css/package.json

@@ -0,0 +1,47 @@
+{
+  "name": "@csstools/normalize.css",
+  "version": "10.1.0",
+  "description": "A cross-browser CSS foundation",
+  "author": "Jonathan Neal <jonathantneal@hotmail.com>",
+  "contributors": [
+    "Jonathan Neal <jonathantneal@hotmail.com> (http://jonathantneal.com/)",
+    "Nicolas Gallagher <nicolas@nicolasgallagher.com> (http://nicolasgallagher.com/)"
+  ],
+  "license": "CC0-1.0",
+  "repository": "csstools/normalize.css",
+  "homepage": "https://github.com/csstools/normalize.css#readme",
+  "bugs": "https://github.com/csstools/normalize.css/issues",
+  "main": "normalize.css",
+  "style": "normalize.css",
+  "files": [
+    "normalize.css",
+    "opinionated.css"
+  ],
+  "scripts": {
+    "prepublishOnly": "npm test",
+    "test": "stylelint normalize.css opinionated.css"
+  },
+  "devDependencies": {
+    "stylelint": "^10.0.1",
+    "stylelint-config-standard": "^18.3.0"
+  },
+  "stylelint": {
+    "extends": "stylelint-config-standard",
+    "rules": {
+      "font-family-no-duplicate-names": [
+        true,
+        {
+          "ignoreFontFamilyNames": [
+            "monospace"
+          ]
+        }
+      ]
+    }
+  },
+  "keywords": [
+    "css",
+    "normalizes",
+    "browsers",
+    "fixes"
+  ]
+}