feat: vendor special version of bootstrap 5

The vendored version contains ONLY the color rules. This makes it easy to create custom themes on top of the original bootstrap.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

global-styles/bootstrap-vendor/_reboot.scss

@@ -1,486 +0,0 @@
-/*
- * SPDX-FileCopyrightText: Original: Nicolas Gallagher and Jonathan Neal, Modified by the HedgeDoc developers (see AUTHORS file)
- *
- * SPDX-License-Identifier: MIT
- */
-
-// stylelint-disable declaration-no-important, selector-no-qualifying-type, property-no-vendor-prefix
-
-// Reboot
-//
-// Normalization of HTML elements, manually forked from Normalize.css to remove
-// styles targeting irrelevant browsers while applying new styles.
-//
-// Normalize is licensed MIT. https://github.com/necolas/normalize.css
-
-
-// Document
-//
-// 1. Change from `box-sizing: content-box` so that `width` is not affected by `padding` or `border`.
-// 2. Change the default font family in all browsers.
-// 3. Correct the line height in all browsers.
-// 4. Prevent adjustments of font size after orientation changes in IE on Windows Phone and in iOS.
-// 5. Change the default tap highlight to be completely transparent in iOS.
-
-*,
-*::before,
-*::after {
-  box-sizing: border-box; // 1
-}
-
-html {
-  font-family: sans-serif; // 2
-  line-height: 1.15; // 3
-  -webkit-text-size-adjust: 100%; // 4
-  -webkit-tap-highlight-color: rgba($black, 0); // 5
-}
-
-// Shim for "new" HTML5 structural elements to display correctly (IE10, older browsers)
-// TODO: remove in v5
-// stylelint-disable-next-line selector-list-comma-newline-after
-article, aside, figcaption, figure, footer, header, hgroup, main, nav, section {
-  display: block;
-}
-
-// Body
-//
-// 1. Remove the margin in all browsers.
-// 2. As a best practice, apply a default `background-color`.
-// 3. Set an explicit initial text-align value so that we can later use
-//    the `inherit` value on things like `<th>` elements.
-
-body {
-  margin: 0; // 1
-  font-family: $font-family-base;
-  @include font-size($font-size-base);
-  font-weight: $font-weight-base;
-  line-height: $line-height-base;
-  color: $body-color;
-  text-align: left; // 3
-  background-color: $body-bg; // 2
-}
-
-// Future-proof rule: in browsers that support :focus-visible, suppress the focus outline
-// on elements that programmatically receive focus but wouldn't normally show a visible
-// focus outline. In general, this would mean that the outline is only applied if the
-// interaction that led to the element receiving programmatic focus was a keyboard interaction,
-// or the browser has somehow determined that the user is primarily a keyboard user and/or
-// wants focus outlines to always be presented.
-//
-// See https://developer.mozilla.org/en-US/docs/Web/CSS/:focus-visible
-// and https://developer.paciellogroup.com/blog/2018/03/focus-visible-and-backwards-compatibility/
-[tabindex="-1"]:focus:not(:focus-visible) {
-  outline: 0 !important;
-}
-
-
-// Content grouping
-//
-// 1. Add the correct box sizing in Firefox.
-// 2. Show the overflow in Edge and IE.
-
-hr {
-  box-sizing: content-box; // 1
-  height: 0; // 1
-  overflow: visible; // 2
-}
-
-
-//
-// Typography
-//
-
-// Remove top margins from headings
-//
-// By default, `<h1>`-`<h6>` all receive top and bottom margins. We nuke the top
-// margin for easier control within type scales as it avoids margin collapsing.
-// stylelint-disable-next-line selector-list-comma-newline-after
-h1, h2, h3, h4, h5, h6 {
-  margin-top: 0;
-  margin-bottom: $headings-margin-bottom;
-}
-
-// Reset margins on paragraphs
-//
-// Similarly, the top margin on `<p>`s get reset. However, we also reset the
-// bottom margin to use `rem` units instead of `em`.
-p {
-  margin-top: 0;
-  margin-bottom: $paragraph-margin-bottom;
-}
-
-// Abbreviations
-//
-// 1. Duplicate behavior to the data-* attribute for our tooltip plugin
-// 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-// 3. Add explicit cursor to indicate changed behavior.
-// 4. Remove the bottom border in Firefox 39-.
-// 5. Prevent the text-decoration to be skipped.
-
-abbr[title],
-abbr[data-original-title] { // 1
-  text-decoration: underline; // 2
-  text-decoration: underline dotted; // 2
-  cursor: help; // 3
-  border-bottom: 0; // 4
-  text-decoration-skip-ink: none; // 5
-}
-
-address {
-  margin-bottom: 1rem;
-  font-style: normal;
-  line-height: inherit;
-}
-
-ol,
-ul,
-dl {
-  margin-top: 0;
-  margin-bottom: 1rem;
-}
-
-ol ol,
-ul ul,
-ol ul,
-ul ol {
-  margin-bottom: 0;
-}
-
-dt {
-  font-weight: $dt-font-weight;
-}
-
-dd {
-  margin-bottom: .5rem;
-  margin-left: 0; // Undo browser default
-}
-
-blockquote {
-  margin: 0 0 1rem;
-}
-
-b,
-strong {
-  font-weight: $font-weight-bolder; // Add the correct font weight in Chrome, Edge, and Safari
-}
-
-small {
-  @include font-size(80%); // Add the correct font size in all browsers
-}
-
-//
-// Prevent `sub` and `sup` elements from affecting the line height in
-// all browsers.
-//
-
-sub,
-sup {
-  position: relative;
-  @include font-size(75%);
-  line-height: 0;
-  vertical-align: baseline;
-}
-
-sub { bottom: -.25em; }
-sup { top: -.5em; }
-
-
-//
-// Links
-//
-
-a {
-  color: $link-color;
-  text-decoration: $link-decoration;
-  background-color: transparent; // Remove the gray background on active links in IE 10.
-
-  @include hover() {
-    color: $link-hover-color;
-    text-decoration: $link-hover-decoration;
-  }
-}
-
-// And undo these styles for placeholder links/named anchors (without href).
-// It would be more straightforward to just use a[href] in previous block, but that
-// causes specificity issues in many other styles that are too complex to fix.
-// See https://github.com/twbs/bootstrap/issues/19402
-
-a:not([href]):not([class]) {
-  color: inherit;
-  text-decoration: none;
-
-  @include hover() {
-    color: inherit;
-    text-decoration: none;
-  }
-}
-
-
-//
-// Code
-//
-
-pre,
-code,
-kbd,
-samp {
-  font-family: $font-family-monospace;
-  @include font-size(1em); // Correct the odd `em` font sizing in all browsers.
-}
-
-pre {
-  // Remove browser default top margin
-  margin-top: 0;
-  // Reset browser default of `1em` to use `rem`s
-  margin-bottom: 1rem;
-  // Don't allow content to break outside
-  overflow: auto;
-  // Disable auto-hiding scrollbar in IE & legacy Edge to avoid overlap,
-  // making it impossible to interact with the content
-  -ms-overflow-style: scrollbar;
-}
-
-
-//
-// Figures
-//
-
-figure {
-  // Apply a consistent margin strategy (matches our type styles).
-  margin: 0 0 1rem;
-}
-
-
-//
-// Images and content
-//
-
-img {
-  vertical-align: middle;
-  border-style: none; // Remove the border on images inside links in IE 10-.
-}
-
-svg {
-  // Workaround for the SVG overflow bug in IE10/11 is still required.
-  // See https://github.com/twbs/bootstrap/issues/26878
-  overflow: hidden;
-  vertical-align: middle;
-}
-
-
-//
-// Tables
-//
-
-table {
-  border-collapse: collapse; // Prevent double borders
-}
-
-caption {
-  padding-top: $table-cell-padding;
-  padding-bottom: $table-cell-padding;
-  color: $table-caption-color;
-  text-align: left;
-  caption-side: bottom;
-}
-
-// 1. Removes font-weight bold by inheriting
-// 2. Matches default `<td>` alignment by inheriting `text-align`.
-// 3. Fix alignment for Safari
-
-th {
-  font-weight: $table-th-font-weight; // 1
-  text-align: inherit; // 2
-  text-align: -webkit-match-parent; // 3
-}
-
-
-//
-// Forms
-//
-
-label {
-  // Allow labels to use `margin` for spacing.
-  display: inline-block;
-  margin-bottom: $label-margin-bottom;
-}
-
-// Remove the default `border-radius` that macOS Chrome adds.
-//
-// Details at https://github.com/twbs/bootstrap/issues/24093
-button {
-  // stylelint-disable-next-line property-disallowed-list
-  border-radius: 0;
-}
-
-// Explicitly remove focus outline in Chromium when it shouldn't be
-// visible (e.g. as result of mouse click or touch tap). It already
-// should be doing this automatically, but seems to currently be
-// confused and applies its very visible two-tone outline anyway.
-
-button:focus:not(:focus-visible) {
-  outline: 0;
-}
-
-input,
-button,
-select,
-optgroup,
-textarea {
-  margin: 0; // Remove the margin in Firefox and Safari
-  font-family: inherit;
-  @include font-size(inherit);
-  line-height: inherit;
-}
-
-button,
-input {
-  overflow: visible; // Show the overflow in Edge
-}
-
-button,
-select {
-  text-transform: none; // Remove the inheritance of text transform in Firefox
-}
-
-// Set the cursor for non-`<button>` buttons
-//
-// Details at https://github.com/twbs/bootstrap/pull/30562
-[role="button"] {
-  cursor: pointer;
-}
-
-// Remove the inheritance of word-wrap in Safari.
-//
-// Details at https://github.com/twbs/bootstrap/issues/24990
-select {
-  word-wrap: normal;
-}
-
-
-// 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-//    controls in Android 4.
-// 2. Correct the inability to style clickable types in iOS and Safari.
-button,
-[type="button"], // 1
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button; // 2
-}
-
-// Opinionated: add "hand" cursor to non-disabled button elements.
-@if $enable-pointer-cursor-for-buttons {
-  button,
-  [type="button"],
-  [type="reset"],
-  [type="submit"] {
-    &:not(:disabled) {
-      cursor: pointer;
-    }
-  }
-}
-
-// Remove inner border and padding from Firefox, but don't restore the outline like Normalize.
-button::-moz-focus-inner,
-[type="button"]::-moz-focus-inner,
-[type="reset"]::-moz-focus-inner,
-[type="submit"]::-moz-focus-inner {
-  padding: 0;
-  border-style: none;
-}
-
-input[type="radio"],
-input[type="checkbox"] {
-  box-sizing: border-box; // 1. Add the correct box sizing in IE 10-
-  padding: 0; // 2. Remove the padding in IE 10-
-}
-
-
-textarea {
-  overflow: auto; // Remove the default vertical scrollbar in IE.
-  // Textareas should really only resize vertically so they don't break their (horizontal) containers.
-  resize: vertical;
-}
-
-fieldset {
-  // Browsers set a default `min-width: min-content;` on fieldsets,
-  // unlike e.g. `<div>`s, which have `min-width: 0;` by default.
-  // So we reset that to ensure fieldsets behave more like a standard block element.
-  // See https://github.com/twbs/bootstrap/issues/12359
-  // and https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements
-  min-width: 0;
-  // Reset the default outline behavior of fieldsets so they don't affect page layout.
-  padding: 0;
-  margin: 0;
-  border: 0;
-}
-
-// 1. Correct the text wrapping in Edge and IE.
-// 2. Correct the color inheritance from `fieldset` elements in IE.
-legend {
-  display: block;
-  width: 100%;
-  max-width: 100%; // 1
-  padding: 0;
-  margin-bottom: .5rem;
-  @include font-size(1.5rem);
-  line-height: inherit;
-  color: inherit; // 2
-  white-space: normal; // 1
-}
-
-progress {
-  vertical-align: baseline; // Add the correct vertical alignment in Chrome, Firefox, and Opera.
-}
-
-// Correct the cursor style of increment and decrement buttons in Chrome.
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto;
-}
-
-[type="search"] {
-  // This overrides the extra rounded corners on search inputs in iOS so that our
-  // `.form-control` class can properly style them. Note that this cannot simply
-  // be added to `.form-control` as it's not specific enough. For details, see
-  // https://github.com/twbs/bootstrap/issues/11586.
-  outline-offset: -2px; // 2. Correct the outline style in Safari.
-  -webkit-appearance: none;
-}
-
-//
-// Remove the inner padding in Chrome and Safari on macOS.
-//
-
-[type="search"]::-webkit-search-decoration {
-  -webkit-appearance: none;
-}
-
-//
-// 1. Correct the inability to style clickable types in iOS and Safari.
-// 2. Change font properties to `inherit` in Safari.
-//
-
-::-webkit-file-upload-button {
-  font: inherit; // 2
-  -webkit-appearance: button; // 1
-}
-
-//
-// Correct element displays
-//
-
-output {
-  display: inline-block;
-}
-
-summary {
-  display: list-item; // Add the correct display in all browsers
-  cursor: pointer;
-}
-
-template {
-  display: none; // Add the correct display in IE
-}
-
-// Removed a rule that clashes with reveal.js. It was only used in IE anyway.

global-styles/bootstrap-vendor/bootstrap.scss

@@ -1,45 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-/**
-Copy of the main bootstrap scss file but without transitions.scss because that clashes with reveal.
- */
-@import "~bootstrap/scss/functions";
-@import "~bootstrap/scss/variables";
-@import "~bootstrap/scss/mixins";
-@import "~bootstrap/scss/root";
-@import "reboot";
-@import "~bootstrap/scss/type";
-@import "~bootstrap/scss/images";
-@import "~bootstrap/scss/code";
-@import "~bootstrap/scss/grid";
-@import "~bootstrap/scss/tables";
-@import "~bootstrap/scss/forms";
-@import "~bootstrap/scss/buttons";
-@import "~bootstrap/scss/dropdown";
-@import "~bootstrap/scss/button-group";
-@import "~bootstrap/scss/input-group";
-@import "~bootstrap/scss/custom-forms";
-@import "~bootstrap/scss/nav";
-@import "~bootstrap/scss/navbar";
-@import "~bootstrap/scss/card";
-@import "~bootstrap/scss/breadcrumb";
-@import "~bootstrap/scss/pagination";
-@import "~bootstrap/scss/badge";
-@import "~bootstrap/scss/jumbotron";
-@import "~bootstrap/scss/alert";
-@import "~bootstrap/scss/progress";
-@import "~bootstrap/scss/media";
-@import "~bootstrap/scss/list-group";
-@import "~bootstrap/scss/close";
-@import "~bootstrap/scss/toasts";
-@import "~bootstrap/scss/modal";
-@import "~bootstrap/scss/tooltip";
-@import "~bootstrap/scss/popover";
-@import "~bootstrap/scss/carousel";
-@import "~bootstrap/scss/spinners";
-@import "~bootstrap/scss/utilities";
-@import "~bootstrap/scss/print";

global-styles/colors-only-bootstrap/_accordion.scss

@@ -0,0 +1,25 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// Base styles
+//
+
+.accordion {
+  // scss-docs-start accordion-css-vars
+  --#{$prefix}accordion-color: #{$accordion-color};
+  --#{$prefix}accordion-bg: #{$accordion-bg};
+  --#{$prefix}accordion-border-color: #{$accordion-border-color};
+  --#{$prefix}accordion-btn-color: #{$accordion-button-color};
+  --#{$prefix}accordion-btn-bg: #{$accordion-button-bg};
+  --#{$prefix}accordion-btn-icon: #{escape-svg($accordion-button-icon)};
+  --#{$prefix}accordion-btn-active-icon: #{escape-svg($accordion-button-active-icon)};
+  --#{$prefix}accordion-btn-focus-border-color: #{$accordion-button-focus-border-color};
+  --#{$prefix}accordion-btn-focus-box-shadow: #{$accordion-button-focus-box-shadow};
+  --#{$prefix}accordion-active-color: #{$accordion-button-active-color};
+  --#{$prefix}accordion-active-bg: #{$accordion-button-active-bg};
+  // scss-docs-end accordion-css-vars
+}

global-styles/colors-only-bootstrap/_alert.scss

@@ -0,0 +1,22 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// scss-docs-start alert-modifiers
+// Generate contextual modifier classes for colorizing the alert.
+
+@each $state, $value in $theme-colors {
+  $alert-background: shift-color($value, $alert-bg-scale);
+  $alert-border: shift-color($value, $alert-border-scale);
+  $alert-color: shift-color($value, $alert-color-scale);
+
+  @if (contrast-ratio($alert-background, $alert-color) < $min-contrast-ratio) {
+    $alert-color: mix($value, color-contrast($alert-background), abs($alert-color-scale));
+  }
+  .alert-#{$state} {
+    @include alert-variant($alert-background, $alert-border, $alert-color);
+  }
+}
+// scss-docs-end alert-modifiers

global-styles/colors-only-bootstrap/_badge.scss

@@ -0,0 +1,16 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Base class
+//
+// Requires one of the contextual, color modifier classes for `color` and
+// `background-color`.
+
+.badge {
+  // scss-docs-start badge-css-vars
+  --#{$prefix}badge-color: #{$badge-color};
+  // scss-docs-end badge-css-vars
+}

global-styles/colors-only-bootstrap/_breadcrumb.scss

@@ -0,0 +1,13 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+.breadcrumb {
+  // scss-docs-start breadcrumb-css-vars
+  --#{$prefix}breadcrumb-bg: #{$breadcrumb-bg};
+  --#{$prefix}breadcrumb-divider-color: #{$breadcrumb-divider-color};
+  --#{$prefix}breadcrumb-item-active-color: #{$breadcrumb-active-color};
+  // scss-docs-end breadcrumb-css-vars
+}

global-styles/colors-only-bootstrap/_buttons.scss

@@ -0,0 +1,67 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// Base styles
+//
+
+.btn {
+  // scss-docs-start btn-css-vars
+  --#{$prefix}btn-color: #{$body-color};
+}
+
+
+//
+// Alternate buttons
+//
+
+// scss-docs-start btn-variant-loops
+@each $color, $value in $theme-colors {
+  .btn-#{$color} {
+    @if $color == "light" {
+      @include button-variant(
+        $value,
+        $value,
+        $hover-background: shade-color($value, $btn-hover-bg-shade-amount),
+        $hover-border: shade-color($value, $btn-hover-border-shade-amount),
+        $active-background: shade-color($value, $btn-active-bg-shade-amount),
+        $active-border: shade-color($value, $btn-active-border-shade-amount)
+      );
+    } @else if $color == "dark" {
+      @include button-variant(
+        $value,
+        $value,
+        $hover-background: tint-color($value, $btn-hover-bg-tint-amount),
+        $hover-border: tint-color($value, $btn-hover-border-tint-amount),
+        $active-background: tint-color($value, $btn-active-bg-tint-amount),
+        $active-border: tint-color($value, $btn-active-border-tint-amount)
+      );
+    } @else {
+      @include button-variant($value, $value);
+    }
+  }
+}
+
+@each $color, $value in $theme-colors {
+  .btn-outline-#{$color} {
+    @include button-outline-variant($value);
+  }
+}
+// scss-docs-end btn-variant-loops
+
+
+//
+// Link buttons
+//
+
+// Make a button look and behave like a link
+.btn-link {
+  --#{$prefix}btn-color: #{$btn-link-color};
+  --#{$prefix}btn-hover-color: #{$btn-link-hover-color};
+  --#{$prefix}btn-active-color: #{$btn-link-hover-color};
+  --#{$prefix}btn-disabled-color: #{$btn-link-disabled-color};
+  --#{$prefix}btn-focus-shadow-rgb: #{to-rgb(mix(color-contrast($primary), $primary, 15%))};
+}

global-styles/colors-only-bootstrap/_card.scss

@@ -0,0 +1,20 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// Base styles
+//
+
+.card {
+  // scss-docs-start card-css-vars
+  --#{$prefix}card-border-color: #{$card-border-color};
+  --#{$prefix}card-box-shadow: #{$card-box-shadow};
+  --#{$prefix}card-cap-bg: #{$card-cap-bg};
+  --#{$prefix}card-cap-color: #{$card-cap-color};
+  --#{$prefix}card-color: #{$card-color};
+  --#{$prefix}card-bg: #{$card-bg};
+  // scss-docs-end card-css-vars
+}

global-styles/colors-only-bootstrap/_carousel.scss

@@ -0,0 +1,58 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// Left/right controls for nav
+//
+
+.carousel-control-prev,
+.carousel-control-next {
+  color: $carousel-control-color;
+
+  // Hover/focus state
+  &:hover,
+  &:focus {
+    color: $carousel-control-color;
+  }
+}
+
+.carousel-control-prev-icon {
+  background-image: escape-svg($carousel-control-prev-icon-bg);
+}
+.carousel-control-next-icon {
+  background-image: escape-svg($carousel-control-next-icon-bg);
+}
+
+// Optional indicator pips/controls
+//
+// Add a container (such as a list) with the following class and add an item (ideally a focusable control,
+// like a button) with data-bs-target for each slide your carousel holds.
+
+.carousel-indicators {
+  [data-bs-target] {
+    background-color: $carousel-indicator-active-bg;
+  }
+}
+
+// Optional captions
+//
+//
+
+.carousel-caption {
+  color: $carousel-caption-color;
+}
+
+// Dark mode carousel
+
+.carousel-dark {
+  .carousel-indicators [data-bs-target] {
+    background-color: $carousel-dark-indicator-active-bg;
+  }
+
+  .carousel-caption {
+    color: $carousel-dark-caption-color;
+  }
+}

global-styles/colors-only-bootstrap/_close.scss

@@ -0,0 +1,24 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Transparent background and border properties included for button version.
+// iOS requires the button element instead of an anchor tag.
+// If you want the anchor version, it requires `href="#"`.
+// See https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile
+
+.btn-close {
+  color: $btn-close-color;
+  background: transparent escape-svg($btn-close-bg) center / $btn-close-width auto no-repeat; // include transparent for button elements
+
+  // Override <a>'s hover style
+  &:hover {
+    color: $btn-close-color;
+  }
+
+  &:focus {
+    box-shadow: $btn-close-focus-shadow;
+  }
+}

global-styles/colors-only-bootstrap/_dropdown.scss

@@ -0,0 +1,41 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// The dropdown menu
+.dropdown-menu {
+  // scss-docs-start dropdown-css-vars
+  --#{$prefix}dropdown-color: #{$dropdown-color};
+  --#{$prefix}dropdown-bg: #{$dropdown-bg};
+  --#{$prefix}dropdown-border-color: #{$dropdown-border-color};
+  --#{$prefix}dropdown-divider-bg: #{$dropdown-divider-bg};
+  --#{$prefix}dropdown-box-shadow: #{$dropdown-box-shadow};
+  --#{$prefix}dropdown-link-color: #{$dropdown-link-color};
+  --#{$prefix}dropdown-link-hover-color: #{$dropdown-link-hover-color};
+  --#{$prefix}dropdown-link-hover-bg: #{$dropdown-link-hover-bg};
+  --#{$prefix}dropdown-link-active-color: #{$dropdown-link-active-color};
+  --#{$prefix}dropdown-link-active-bg: #{$dropdown-link-active-bg};
+  --#{$prefix}dropdown-link-disabled-color: #{$dropdown-link-disabled-color};
+  --#{$prefix}dropdown-header-color: #{$dropdown-header-color};
+  // scss-docs-end dropdown-css-vars
+}
+
+// Dark dropdowns
+.dropdown-menu-dark {
+  // scss-docs-start dropdown-dark-css-vars
+  --#{$prefix}dropdown-color: #{$dropdown-dark-color};
+  --#{$prefix}dropdown-bg: #{$dropdown-dark-bg};
+  --#{$prefix}dropdown-border-color: #{$dropdown-dark-border-color};
+  --#{$prefix}dropdown-box-shadow: #{$dropdown-dark-box-shadow};
+  --#{$prefix}dropdown-link-color: #{$dropdown-dark-link-color};
+  --#{$prefix}dropdown-link-hover-color: #{$dropdown-dark-link-hover-color};
+  --#{$prefix}dropdown-divider-bg: #{$dropdown-dark-divider-bg};
+  --#{$prefix}dropdown-link-hover-bg: #{$dropdown-dark-link-hover-bg};
+  --#{$prefix}dropdown-link-active-color: #{$dropdown-dark-link-active-color};
+  --#{$prefix}dropdown-link-active-bg: #{$dropdown-dark-link-active-bg};
+  --#{$prefix}dropdown-link-disabled-color: #{$dropdown-dark-link-disabled-color};
+  --#{$prefix}dropdown-header-color: #{$dropdown-dark-header-color};
+  // scss-docs-end dropdown-dark-css-vars
+}

global-styles/colors-only-bootstrap/_forms.scss

@@ -0,0 +1,14 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+@import "forms/labels";
+@import "forms/form-text";
+@import "forms/form-control";
+@import "forms/form-select";
+@import "forms/form-check";
+@import "forms/form-range";
+@import "forms/input-group";
+@import "forms/validation";

global-styles/colors-only-bootstrap/_helpers.scss

@@ -0,0 +1,8 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+@import "helpers/color-bg";
+@import "helpers/colored-links";

global-styles/colors-only-bootstrap/_images.scss

@@ -0,0 +1,16 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Image thumbnails
+.img-thumbnail {
+  background-color: $thumbnail-bg;
+  border-color: $thumbnail-border-color;
+  @include box-shadow($thumbnail-box-shadow);
+}
+
+.figure-caption {
+  color: $figure-caption-color;
+}

global-styles/colors-only-bootstrap/_list-group.scss

@@ -0,0 +1,44 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Base class
+//
+// Easily usable on <ul>, <ol>, or <div>.
+
+.list-group {
+  // scss-docs-start list-group-css-vars
+  --#{$prefix}list-group-color: #{$list-group-color};
+  --#{$prefix}list-group-bg: #{$list-group-bg};
+  --#{$prefix}list-group-border-color: #{$list-group-border-color};
+  --#{$prefix}list-group-action-color: #{$list-group-action-color};
+  --#{$prefix}list-group-action-hover-color: #{$list-group-action-hover-color};
+  --#{$prefix}list-group-action-hover-bg: #{$list-group-hover-bg};
+  --#{$prefix}list-group-action-active-color: #{$list-group-action-active-color};
+  --#{$prefix}list-group-action-active-bg: #{$list-group-action-active-bg};
+  --#{$prefix}list-group-disabled-color: #{$list-group-disabled-color};
+  --#{$prefix}list-group-disabled-bg: #{$list-group-disabled-bg};
+  --#{$prefix}list-group-active-color: #{$list-group-active-color};
+  --#{$prefix}list-group-active-bg: #{$list-group-active-bg};
+  --#{$prefix}list-group-active-border-color: #{$list-group-active-border-color};
+  // scss-docs-end list-group-css-vars
+}
+
+// scss-docs-start list-group-modifiers
+// List group contextual variants
+//
+// Add modifier classes to change text and background color on individual items.
+// Organizationally, this must come after the `:hover` states.
+
+@each $state, $value in $theme-colors {
+  $list-group-variant-bg: shift-color($value, $list-group-item-bg-scale);
+  $list-group-variant-color: shift-color($value, $list-group-item-color-scale);
+  @if (contrast-ratio($list-group-variant-bg, $list-group-variant-color) < $min-contrast-ratio) {
+    $list-group-variant-color: mix($value, color-contrast($list-group-variant-bg), abs($list-group-item-color-scale));
+  }
+
+  @include list-group-item-variant($state, $list-group-variant-bg, $list-group-variant-color);
+}
+// scss-docs-end list-group-modifiers

global-styles/colors-only-bootstrap/_modal.scss

@@ -0,0 +1,33 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// stylelint-disable function-disallowed-list
+
+// .modal-open      - body class for killing the scroll
+// .modal           - container to scroll within
+// .modal-dialog    - positioning shell for the actual modal
+// .modal-content   - actual modal w/ bg and corners and stuff
+
+
+// Container that the modal scrolls within
+.modal {
+  // scss-docs-start modal-css-vars
+  --#{$prefix}modal-color: #{$modal-content-color};
+  --#{$prefix}modal-bg: #{$modal-content-bg};
+  --#{$prefix}modal-border-color: #{$modal-content-border-color};
+  --#{$prefix}modal-box-shadow: #{$modal-content-box-shadow-xs};
+  --#{$prefix}modal-header-border-color: #{$modal-header-border-color};
+  --#{$prefix}modal-footer-bg: #{$modal-footer-bg};
+  --#{$prefix}modal-footer-border-color: #{$modal-footer-border-color};
+  // scss-docs-end modal-css-vars
+}
+
+// Modal background
+.modal-backdrop {
+  // scss-docs-start modal-backdrop-css-vars
+  --#{$prefix}backdrop-bg: #{$modal-backdrop-bg};
+  // scss-docs-end modal-backdrop-css-vars
+}

global-styles/colors-only-bootstrap/_nav.scss

@@ -0,0 +1,41 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Base class
+//
+// Kickstart any navigation component with a set of style resets. Works with
+// `<nav>`s, `<ul>`s or `<ol>`s.
+
+.nav {
+  // scss-docs-start nav-css-vars
+  --#{$prefix}nav-link-color: #{$nav-link-color};
+  --#{$prefix}nav-link-hover-color: #{$nav-link-hover-color};
+  --#{$prefix}nav-link-disabled-color: #{$nav-link-disabled-color};
+  // scss-docs-end nav-css-vars
+}
+
+//
+// Tabs
+//
+.nav-tabs {
+  // scss-docs-start nav-tabs-css-vars
+  --#{$prefix}nav-tabs-border-color: #{$nav-tabs-border-color};
+  --#{$prefix}nav-tabs-link-hover-border-color: #{$nav-tabs-link-hover-border-color};
+  --#{$prefix}nav-tabs-link-active-color: #{$nav-tabs-link-active-color};
+  --#{$prefix}nav-tabs-link-active-bg: #{$nav-tabs-link-active-bg};
+  --#{$prefix}nav-tabs-link-active-border-color: #{$nav-tabs-link-active-border-color};
+  // scss-docs-end nav-tabs-css-vars
+}
+
+//
+// Pills
+//
+.nav-pills {
+  // scss-docs-start nav-pills-css-vars
+  --#{$prefix}nav-pills-link-active-color: #{$nav-pills-link-active-color};
+  --#{$prefix}nav-pills-link-active-bg: #{$nav-pills-link-active-bg};
+  // scss-docs-end nav-pills-css-vars
+}

global-styles/colors-only-bootstrap/_navbar.scss

@@ -0,0 +1,47 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Navbar
+//
+// Provide a static navbar from which we expand to create full-width, fixed, and
+// other navbar variations.
+
+.navbar {
+  // scss-docs-start navbar-css-vars
+  --#{$prefix}navbar-color: #{$navbar-light-color};
+  --#{$prefix}navbar-hover-color: #{$navbar-light-hover-color};
+  --#{$prefix}navbar-disabled-color: #{$navbar-light-disabled-color};
+  --#{$prefix}navbar-active-color: #{$navbar-light-active-color};
+  --#{$prefix}navbar-brand-color: #{$navbar-light-brand-color};
+  --#{$prefix}navbar-brand-hover-color: #{$navbar-light-brand-hover-color};
+  --#{$prefix}navbar-toggler-icon-bg: #{escape-svg($navbar-light-toggler-icon-bg)};
+  --#{$prefix}navbar-toggler-border-color: #{$navbar-light-toggler-border-color};
+  // scss-docs-end navbar-css-vars
+}
+
+// Navbar nav
+//
+// Custom navbar navigation (doesn't require `.nav`, but does make use of `.nav-link`).
+.navbar-nav {
+  // scss-docs-start navbar-nav-css-vars
+  --#{$prefix}nav-link-color: var(--#{$prefix}navbar-color);
+  --#{$prefix}nav-link-hover-color: var(--#{$prefix}navbar-hover-color);
+  --#{$prefix}nav-link-disabled-color: var(--#{$prefix}navbar-disabled-color);
+  // scss-docs-end navbar-nav-css-vars
+}
+
+.navbar-dark {
+  // scss-docs-start navbar-dark-css-vars
+  --#{$prefix}navbar-color: #{$navbar-dark-color};
+  --#{$prefix}navbar-hover-color: #{$navbar-dark-hover-color};
+  --#{$prefix}navbar-disabled-color: #{$navbar-dark-disabled-color};
+  --#{$prefix}navbar-active-color: #{$navbar-dark-active-color};
+  --#{$prefix}navbar-brand-color: #{$navbar-dark-brand-color};
+  --#{$prefix}navbar-brand-hover-color: #{$navbar-dark-brand-hover-color};
+  --#{$prefix}navbar-toggler-border-color: #{$navbar-dark-toggler-border-color};
+  --#{$prefix}navbar-toggler-icon-bg: #{escape-svg($navbar-dark-toggler-icon-bg)};
+  // scss-docs-end navbar-dark-css-vars
+}

global-styles/colors-only-bootstrap/_offcanvas.scss

@@ -0,0 +1,26 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// stylelint-disable function-disallowed-list
+
+%offcanvas-css-vars {
+  // scss-docs-start offcanvas-css-vars
+  --#{$prefix}offcanvas-color: #{$offcanvas-color};
+  --#{$prefix}offcanvas-bg: #{$offcanvas-bg-color};
+  --#{$prefix}offcanvas-border-color: #{$offcanvas-border-color};
+  --#{$prefix}offcanvas-box-shadow: #{$offcanvas-box-shadow};
+  // scss-docs-end offcanvas-css-vars
+}
+
+@each $breakpoint in map-keys($grid-breakpoints) {
+  $next: breakpoint-next($breakpoint, $grid-breakpoints);
+  $infix: breakpoint-infix($next, $grid-breakpoints);
+
+  .offcanvas#{$infix} {
+    @extend %offcanvas-css-vars;
+  }
+}
+

global-styles/colors-only-bootstrap/_pagination.scss

@@ -0,0 +1,25 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+.pagination {
+  // scss-docs-start pagination-css-vars
+  --#{$prefix}pagination-color: #{$pagination-color};
+  --#{$prefix}pagination-bg: #{$pagination-bg};
+  --#{$prefix}pagination-border-color: #{$pagination-border-color};
+  --#{$prefix}pagination-hover-color: #{$pagination-hover-color};
+  --#{$prefix}pagination-hover-bg: #{$pagination-hover-bg};
+  --#{$prefix}pagination-hover-border-color: #{$pagination-hover-border-color};
+  --#{$prefix}pagination-focus-color: #{$pagination-focus-color};
+  --#{$prefix}pagination-focus-bg: #{$pagination-focus-bg};
+  --#{$prefix}pagination-focus-box-shadow: #{$pagination-focus-box-shadow};
+  --#{$prefix}pagination-active-color: #{$pagination-active-color};
+  --#{$prefix}pagination-active-bg: #{$pagination-active-bg};
+  --#{$prefix}pagination-active-border-color: #{$pagination-active-border-color};
+  --#{$prefix}pagination-disabled-color: #{$pagination-disabled-color};
+  --#{$prefix}pagination-disabled-bg: #{$pagination-disabled-bg};
+  --#{$prefix}pagination-disabled-border-color: #{$pagination-disabled-border-color};
+  // scss-docs-end pagination-css-vars
+}

global-styles/colors-only-bootstrap/_popover.scss

@@ -0,0 +1,17 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+.popover {
+  // scss-docs-start popover-css-vars
+  --#{$prefix}popover-bg: #{$popover-bg};
+  --#{$prefix}popover-border-color: #{$popover-border-color};
+  --#{$prefix}popover-box-shadow: #{$popover-box-shadow};
+  --#{$prefix}popover-header-color: #{$popover-header-color};
+  --#{$prefix}popover-header-bg: #{$popover-header-bg};
+  --#{$prefix}popover-body-color: #{$popover-body-color};
+  --#{$prefix}popover-arrow-border: var(--#{$prefix}popover-border-color);
+  // scss-docs-end popover-css-vars
+}

global-styles/colors-only-bootstrap/_progress.scss

@@ -0,0 +1,14 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+.progress {
+  // scss-docs-start progress-css-vars
+  --#{$prefix}progress-bg: #{$progress-bg};
+  --#{$prefix}progress-box-shadow: #{$progress-box-shadow};
+  --#{$prefix}progress-bar-color: #{$progress-bar-color};
+  --#{$prefix}progress-bar-bg: #{$progress-bar-bg};
+  // scss-docs-end progress-css-vars
+}

global-styles/colors-only-bootstrap/_reboot.scss

@@ -0,0 +1,618 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// stylelint-disable declaration-no-important, selector-no-qualifying-type, property-no-vendor-prefix
+
+
+// Reboot
+//
+// Normalization of HTML elements, manually forked from Normalize.css to remove
+// styles targeting irrelevant browsers while applying new styles.
+//
+// Normalize is licensed MIT. https://github.com/necolas/normalize.css
+
+
+// Document
+//
+// Change from `box-sizing: content-box` so that `width` is not affected by `padding` or `border`.
+
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+
+// Root
+//
+// Ability to the value of the root font sizes, affecting the value of `rem`.
+// null by default, thus nothing is generated.
+
+:root {
+  @if $font-size-root != null {
+    @include font-size(var(--#{$prefix}root-font-size));
+  }
+
+  @if $enable-smooth-scroll {
+    @media (prefers-reduced-motion: no-preference) {
+      scroll-behavior: smooth;
+    }
+  }
+}
+
+
+// Body
+//
+// 1. Remove the margin in all browsers.
+// 2. As a best practice, apply a default `background-color`.
+// 3. Prevent adjustments of font size after orientation changes in iOS.
+// 4. Change the default tap highlight to be completely transparent in iOS.
+
+// scss-docs-start reboot-body-rules
+body {
+  margin: 0; // 1
+  font-family: var(--#{$prefix}body-font-family);
+  @include font-size(var(--#{$prefix}body-font-size));
+  font-weight: var(--#{$prefix}body-font-weight);
+  line-height: var(--#{$prefix}body-line-height);
+  color: var(--#{$prefix}body-color);
+  text-align: var(--#{$prefix}body-text-align);
+  background-color: var(--#{$prefix}body-bg); // 2
+  -webkit-text-size-adjust: 100%; // 3
+  -webkit-tap-highlight-color: rgba($black, 0); // 4
+}
+// scss-docs-end reboot-body-rules
+
+
+// Content grouping
+//
+// 1. Reset Firefox's gray color
+
+hr {
+  margin: $hr-margin-y 0;
+  color: $hr-color; // 1
+  border: 0;
+  border-top: $hr-border-width solid $hr-border-color;
+  opacity: $hr-opacity;
+}
+
+
+// Typography
+//
+// 1. Remove top margins from headings
+//    By default, `<h1>`-`<h6>` all receive top and bottom margins. We nuke the top
+//    margin for easier control within type scales as it avoids margin collapsing.
+
+%heading {
+  margin-top: 0; // 1
+  margin-bottom: $headings-margin-bottom;
+  font-family: $headings-font-family;
+  font-style: $headings-font-style;
+  font-weight: $headings-font-weight;
+  line-height: $headings-line-height;
+  color: $headings-color;
+}
+
+h1 {
+  @extend %heading;
+  @include font-size($h1-font-size);
+}
+
+h2 {
+  @extend %heading;
+  @include font-size($h2-font-size);
+}
+
+h3 {
+  @extend %heading;
+  @include font-size($h3-font-size);
+}
+
+h4 {
+  @extend %heading;
+  @include font-size($h4-font-size);
+}
+
+h5 {
+  @extend %heading;
+  @include font-size($h5-font-size);
+}
+
+h6 {
+  @extend %heading;
+  @include font-size($h6-font-size);
+}
+
+
+// Reset margins on paragraphs
+//
+// Similarly, the top margin on `<p>`s get reset. However, we also reset the
+// bottom margin to use `rem` units instead of `em`.
+
+p {
+  margin-top: 0;
+  margin-bottom: $paragraph-margin-bottom;
+}
+
+
+// Abbreviations
+//
+// 1. Add the correct text decoration in Chrome, Edge, Opera, and Safari.
+// 2. Add explicit cursor to indicate changed behavior.
+// 3. Prevent the text-decoration to be skipped.
+
+abbr[title] {
+  text-decoration: underline dotted; // 1
+  cursor: help; // 2
+  text-decoration-skip-ink: none; // 3
+}
+
+
+// Address
+
+address {
+  margin-bottom: 1rem;
+  font-style: normal;
+  line-height: inherit;
+}
+
+
+// Lists
+
+ol,
+ul {
+  padding-left: 2rem;
+}
+
+ol,
+ul,
+dl {
+  margin-top: 0;
+  margin-bottom: 1rem;
+}
+
+ol ol,
+ul ul,
+ol ul,
+ul ol {
+  margin-bottom: 0;
+}
+
+dt {
+  font-weight: $dt-font-weight;
+}
+
+// 1. Undo browser default
+
+dd {
+  margin-bottom: .5rem;
+  margin-left: 0; // 1
+}
+
+
+// Blockquote
+
+blockquote {
+  margin: 0 0 1rem;
+}
+
+
+// Strong
+//
+// Add the correct font weight in Chrome, Edge, and Safari
+
+b,
+strong {
+  font-weight: $font-weight-bolder;
+}
+
+
+// Small
+//
+// Add the correct font size in all browsers
+
+small {
+  @include font-size($small-font-size);
+}
+
+
+// Mark
+
+mark {
+  padding: $mark-padding;
+  background-color: var(--#{$prefix}highlight-bg);
+}
+
+
+// Sub and Sup
+//
+// Prevent `sub` and `sup` elements from affecting the line height in
+// all browsers.
+
+sub,
+sup {
+  position: relative;
+  @include font-size($sub-sup-font-size);
+  line-height: 0;
+  vertical-align: baseline;
+}
+
+sub { bottom: -.25em; }
+sup { top: -.5em; }
+
+
+// Links
+
+a {
+  color: var(--#{$prefix}link-color);
+  text-decoration: $link-decoration;
+
+  &:hover {
+    color: var(--#{$prefix}link-hover-color);
+    text-decoration: $link-hover-decoration;
+  }
+}
+
+// And undo these styles for placeholder links/named anchors (without href).
+// It would be more straightforward to just use a[href] in previous block, but that
+// causes specificity issues in many other styles that are too complex to fix.
+// See https://github.com/twbs/bootstrap/issues/19402
+
+a:not([href]):not([class]) {
+  &,
+  &:hover {
+    color: inherit;
+    text-decoration: none;
+  }
+}
+
+
+// Code
+
+pre,
+code,
+kbd,
+samp {
+  font-family: $font-family-code;
+  @include font-size(1em); // Correct the odd `em` font sizing in all browsers.
+}
+
+// 1. Remove browser default top margin
+// 2. Reset browser default of `1em` to use `rem`s
+// 3. Don't allow content to break outside
+
+pre {
+  display: block;
+  margin-top: 0; // 1
+  margin-bottom: 1rem; // 2
+  overflow: auto; // 3
+  @include font-size($code-font-size);
+  color: $pre-color;
+
+  // Account for some code outputs that place code tags in pre tags
+  code {
+    @include font-size(inherit);
+    color: inherit;
+    word-break: normal;
+  }
+}
+
+code {
+  @include font-size($code-font-size);
+  color: var(--#{$prefix}code-color);
+  word-wrap: break-word;
+
+  // Streamline the style when inside anchors to avoid broken underline and more
+  a > & {
+    color: inherit;
+  }
+}
+
+kbd {
+  padding: $kbd-padding-y $kbd-padding-x;
+  @include font-size($kbd-font-size);
+  color: $kbd-color;
+  background-color: $kbd-bg;
+  @include border-radius($border-radius-sm);
+
+  kbd {
+    padding: 0;
+    @include font-size(1em);
+    font-weight: $nested-kbd-font-weight;
+  }
+}
+
+
+// Figures
+//
+// Apply a consistent margin strategy (matches our type styles).
+
+figure {
+  margin: 0 0 1rem;
+}
+
+
+// Images and content
+
+img,
+svg {
+  vertical-align: middle;
+}
+
+
+// Tables
+//
+// Prevent double borders
+
+table {
+  caption-side: bottom;
+  border-collapse: collapse;
+}
+
+caption {
+  padding-top: $table-cell-padding-y;
+  padding-bottom: $table-cell-padding-y;
+  color: $table-caption-color;
+  text-align: left;
+}
+
+// 1. Removes font-weight bold by inheriting
+// 2. Matches default `<td>` alignment by inheriting `text-align`.
+// 3. Fix alignment for Safari
+
+th {
+  font-weight: $table-th-font-weight; // 1
+  text-align: inherit; // 2
+  text-align: -webkit-match-parent; // 3
+}
+
+thead,
+tbody,
+tfoot,
+tr,
+td,
+th {
+  border-color: inherit;
+  border-style: solid;
+  border-width: 0;
+}
+
+
+// Forms
+//
+// 1. Allow labels to use `margin` for spacing.
+
+label {
+  display: inline-block; // 1
+}
+
+// Remove the default `border-radius` that macOS Chrome adds.
+// See https://github.com/twbs/bootstrap/issues/24093
+
+button {
+  // stylelint-disable-next-line property-disallowed-list
+  border-radius: 0;
+}
+
+// Explicitly remove focus outline in Chromium when it shouldn't be
+// visible (e.g. as result of mouse click or touch tap). It already
+// should be doing this automatically, but seems to currently be
+// confused and applies its very visible two-tone outline anyway.
+
+button:focus:not(:focus-visible) {
+  outline: 0;
+}
+
+// 1. Remove the margin in Firefox and Safari
+
+input,
+button,
+select,
+optgroup,
+textarea {
+  margin: 0; // 1
+  font-family: inherit;
+  @include font-size(inherit);
+  line-height: inherit;
+}
+
+// Remove the inheritance of text transform in Firefox
+button,
+select {
+  text-transform: none;
+}
+// Set the cursor for non-`<button>` buttons
+//
+// Details at https://github.com/twbs/bootstrap/pull/30562
+[role="button"] {
+  cursor: pointer;
+}
+
+select {
+  // Remove the inheritance of word-wrap in Safari.
+  // See https://github.com/twbs/bootstrap/issues/24990
+  word-wrap: normal;
+
+  // Undo the opacity change from Chrome
+  &:disabled {
+    opacity: 1;
+  }
+}
+
+// Remove the dropdown arrow only from text type inputs built with datalists in Chrome.
+// See https://stackoverflow.com/a/54997118
+
+[list]:not([type="date"]):not([type="datetime-local"]):not([type="month"]):not([type="week"]):not([type="time"])::-webkit-calendar-picker-indicator {
+  display: none !important;
+}
+
+// 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
+//    controls in Android 4.
+// 2. Correct the inability to style clickable types in iOS and Safari.
+// 3. Opinionated: add "hand" cursor to non-disabled button elements.
+
+button,
+[type="button"], // 1
+[type="reset"],
+[type="submit"] {
+  -webkit-appearance: button; // 2
+
+  @if $enable-button-pointers {
+    &:not(:disabled) {
+      cursor: pointer; // 3
+    }
+  }
+}
+
+// Remove inner border and padding from Firefox, but don't restore the outline like Normalize.
+
+::-moz-focus-inner {
+  padding: 0;
+  border-style: none;
+}
+
+// 1. Textareas should really only resize vertically so they don't break their (horizontal) containers.
+
+textarea {
+  resize: vertical; // 1
+}
+
+// 1. Browsers set a default `min-width: min-content;` on fieldsets,
+//    unlike e.g. `<div>`s, which have `min-width: 0;` by default.
+//    So we reset that to ensure fieldsets behave more like a standard block element.
+//    See https://github.com/twbs/bootstrap/issues/12359
+//    and https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements
+// 2. Reset the default outline behavior of fieldsets so they don't affect page layout.
+
+fieldset {
+  min-width: 0; // 1
+  padding: 0; // 2
+  margin: 0; // 2
+  border: 0; // 2
+}
+
+// 1. By using `float: left`, the legend will behave like a block element.
+//    This way the border of a fieldset wraps around the legend if present.
+// 2. Fix wrapping bug.
+//    See https://github.com/twbs/bootstrap/issues/29712
+
+legend {
+  float: left; // 1
+  width: 100%;
+  padding: 0;
+  margin-bottom: $legend-margin-bottom;
+  @include font-size($legend-font-size);
+  font-weight: $legend-font-weight;
+  line-height: inherit;
+
+  + * {
+    clear: left; // 2
+  }
+}
+
+// Fix height of inputs with a type of datetime-local, date, month, week, or time
+// See https://github.com/twbs/bootstrap/issues/18842
+
+::-webkit-datetime-edit-fields-wrapper,
+::-webkit-datetime-edit-text,
+::-webkit-datetime-edit-minute,
+::-webkit-datetime-edit-hour-field,
+::-webkit-datetime-edit-day-field,
+::-webkit-datetime-edit-month-field,
+::-webkit-datetime-edit-year-field {
+  padding: 0;
+}
+
+::-webkit-inner-spin-button {
+  height: auto;
+}
+
+// 1. Correct the outline style in Safari.
+// 2. This overrides the extra rounded corners on search inputs in iOS so that our
+//    `.form-control` class can properly style them. Note that this cannot simply
+//    be added to `.form-control` as it's not specific enough. For details, see
+//    https://github.com/twbs/bootstrap/issues/11586.
+
+[type="search"] {
+  outline-offset: -2px; // 1
+  -webkit-appearance: textfield; // 2
+}
+
+// 1. A few input types should stay LTR
+// See https://rtlstyling.com/posts/rtl-styling#form-inputs
+// 2. RTL only output
+// See https://rtlcss.com/learn/usage-guide/control-directives/#raw
+
+/* rtl:raw:
+[type="tel"],
+[type="url"],
+[type="email"],
+[type="number"] {
+  direction: ltr;
+}
+*/
+
+// Remove the inner padding in Chrome and Safari on macOS.
+
+::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+// Remove padding around color pickers in webkit browsers
+
+::-webkit-color-swatch-wrapper {
+  padding: 0;
+}
+
+
+// 1. Inherit font family and line height for file input buttons
+// 2. Correct the inability to style clickable types in iOS and Safari.
+
+::file-selector-button {
+  font: inherit; // 1
+  -webkit-appearance: button; // 2
+}
+
+// Correct element displays
+
+output {
+  display: inline-block;
+}
+
+// Remove border from iframe
+
+iframe {
+  border: 0;
+}
+
+// Summary
+//
+// 1. Add the correct display in all browsers
+
+summary {
+  display: list-item; // 1
+  cursor: pointer;
+}
+
+
+// Progress
+//
+// Add the correct vertical alignment in Chrome, Firefox, and Opera.
+
+progress {
+  vertical-align: baseline;
+}
+
+// [mrdrogdrog] The following rule has been disabled because it clashes with reveal.js
+
+// Hidden attribute
+//
+// Always hide an element with the `hidden` HTML attribute.
+/*
+[hidden] {
+  display: none !important;
+}
+*/

global-styles/colors-only-bootstrap/_root.scss

@@ -0,0 +1,48 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+:root {
+  // Note: Custom variable values only support SassScript inside `#{}`.
+
+  // Colors
+  //
+  // Generate palettes for full colors, grays, and theme colors.
+
+  @each $color, $value in $colors {
+    --#{$prefix}#{$color}: #{$value};
+  }
+
+  @each $color, $value in $grays {
+    --#{$prefix}gray-#{$color}: #{$value};
+  }
+
+  @each $color, $value in $theme-colors {
+    --#{$prefix}#{$color}: #{$value};
+  }
+
+  @each $color, $value in $theme-colors-rgb {
+    --#{$prefix}#{$color}-rgb: #{$value};
+  }
+
+  --#{$prefix}white-rgb: #{to-rgb($white)};
+  --#{$prefix}black-rgb: #{to-rgb($black)};
+  --#{$prefix}body-color-rgb: #{to-rgb($body-color)};
+  --#{$prefix}body-bg-rgb: #{to-rgb($body-bg)};
+
+  --#{$prefix}body-color: #{$body-color};
+  --#{$prefix}body-bg: #{$body-bg};
+  // scss-docs-end root-body-variables
+
+  --#{$prefix}border-color: #{$border-color};
+  --#{$prefix}border-color-translucent: #{$border-color-translucent};
+
+  --#{$prefix}link-color: #{$link-color};
+  --#{$prefix}link-hover-color: #{$link-hover-color};
+
+  --#{$prefix}code-color: #{$code-color};
+
+  --#{$prefix}highlight-bg: #{$mark-bg};
+}

global-styles/colors-only-bootstrap/_tables.scss

@@ -0,0 +1,36 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// Basic Bootstrap table
+//
+
+.table {
+  --#{$prefix}table-color: #{$table-color};
+  --#{$prefix}table-bg: #{$table-bg};
+  --#{$prefix}table-border-color: #{$table-border-color};
+  --#{$prefix}table-accent-bg: #{$table-accent-bg};
+  --#{$prefix}table-striped-color: #{$table-striped-color};
+  --#{$prefix}table-striped-bg: #{$table-striped-bg};
+  --#{$prefix}table-active-color: #{$table-active-color};
+  --#{$prefix}table-active-bg: #{$table-active-bg};
+  --#{$prefix}table-hover-color: #{$table-hover-color};
+  --#{$prefix}table-hover-bg: #{$table-hover-bg};
+}
+
+.table-group-divider {
+  border-top-color: $table-group-separator-color;
+}
+
+
+// Table variants
+//
+// Table variants set the table cell backgrounds, border colors
+// and the colors of the striped, hovered & active tables
+
+@each $color, $value in $table-variants {
+  @include table-variant($color, $value);
+}

global-styles/colors-only-bootstrap/_toasts.scss

@@ -0,0 +1,17 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+.toast {
+  // scss-docs-start toast-css-vars
+  --#{$prefix}toast-color: #{$toast-color};
+  --#{$prefix}toast-bg: #{$toast-background-color};
+  --#{$prefix}toast-border-color: #{$toast-border-color};
+  --#{$prefix}toast-box-shadow: #{$toast-box-shadow};
+  --#{$prefix}toast-header-color: #{$toast-header-color};
+  --#{$prefix}toast-header-bg: #{$toast-header-background-color};
+  --#{$prefix}toast-header-border-color: #{$toast-header-border-color};
+  // scss-docs-end toast-css-vars
+}

global-styles/colors-only-bootstrap/_tooltip.scss

@@ -0,0 +1,13 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Base class
+.tooltip {
+  // scss-docs-start tooltip-css-vars
+  --#{$prefix}tooltip-color: #{$tooltip-color};
+  --#{$prefix}tooltip-bg: #{$tooltip-bg};
+  // scss-docs-end tooltip-css-vars
+}

global-styles/colors-only-bootstrap/_type.scss

@@ -0,0 +1,9 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+.blockquote-footer {
+  color: $blockquote-footer-color;
+}

global-styles/colors-only-bootstrap/bootstrap.scss

@@ -0,0 +1,51 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+/**
+[mrdrogdrog] This directory is a modified copy of Bootstrap 5. But it contains only color rules. This is helpful when creating color themes like dark modes.
+ */
+@import "~bootstrap/scss/mixins/banner";
+@include bsBanner("");
+
+// scss-docs-start import-stack
+// Configuration
+@import "~bootstrap/scss/functions";
+@import "~bootstrap/scss/variables";
+@import "~bootstrap/scss/maps";
+@import "~bootstrap/scss/mixins";
+@import "~bootstrap/scss/utilities";
+
+// Layout & components
+@import "root";
+@import "type";
+@import "images";
+@import "tables";
+@import "forms";
+@import "buttons";
+//@import "~bootstrap/scss/transitions"; // removed because it clashes with reveal.js
+@import "dropdown";
+@import "nav";
+@import "navbar";
+@import "card";
+@import "accordion";
+@import "breadcrumb";
+@import "pagination";
+@import "badge";
+@import "alert";
+@import "progress";
+@import "list-group";
+@import "close";
+@import "toasts";
+@import "modal";
+@import "tooltip";
+@import "popover";
+@import "carousel";
+@import "offcanvas";
+
+// Helpers
+@import "helpers";
+
+// scss-docs-end import-stack

global-styles/colors-only-bootstrap/forms/_form-check.scss

@@ -0,0 +1,77 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// Check/radio
+//
+
+.form-check-input {
+  background-color: $form-check-input-bg;
+  border: $form-check-input-border;
+
+  &:focus {
+    border-color: $form-check-input-focus-border;
+    box-shadow: $form-check-input-focus-box-shadow;
+  }
+
+  &:checked {
+    background-color: $form-check-input-checked-bg-color;
+    border-color: $form-check-input-checked-border-color;
+
+    &[type="checkbox"] {
+      @if $enable-gradients {
+        background-image: escape-svg($form-check-input-checked-bg-image), var(--#{$prefix}gradient);
+      } @else {
+        background-image: escape-svg($form-check-input-checked-bg-image);
+      }
+    }
+
+    &[type="radio"] {
+      @if $enable-gradients {
+        background-image: escape-svg($form-check-radio-checked-bg-image), var(--#{$prefix}gradient);
+      } @else {
+        background-image: escape-svg($form-check-radio-checked-bg-image);
+      }
+    }
+  }
+
+  &[type="checkbox"]:indeterminate {
+    background-color: $form-check-input-indeterminate-bg-color;
+    border-color: $form-check-input-indeterminate-border-color;
+
+    @if $enable-gradients {
+      background-image: escape-svg($form-check-input-indeterminate-bg-image), var(--#{$prefix}gradient);
+    } @else {
+      background-image: escape-svg($form-check-input-indeterminate-bg-image);
+    }
+  }
+}
+
+.form-check-label {
+  color: $form-check-label-color;
+}
+
+//
+// Switch
+//
+
+.form-switch {
+  .form-check-input {
+    background-image: escape-svg($form-switch-bg-image);
+
+    &:focus {
+      background-image: escape-svg($form-switch-focus-bg-image);
+    }
+
+    &:checked {
+      @if $enable-gradients {
+        background-image: escape-svg($form-switch-checked-bg-image), var(--#{$prefix}gradient);
+      } @else {
+        background-image: escape-svg($form-switch-checked-bg-image);
+      }
+    }
+  }
+}

global-styles/colors-only-bootstrap/forms/_form-control.scss

@@ -0,0 +1,67 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// General form controls (plus a few specific high-level interventions)
+//
+
+.form-control {
+  color: $input-color;
+  background-color: $input-bg;
+  border-color: $input-border-color;
+
+  @include box-shadow($input-box-shadow);
+
+  // Customize the `:focus` state to imitate native WebKit styles.
+  &:focus {
+    color: $input-focus-color;
+    background-color: $input-focus-bg;
+    border-color: $input-focus-border-color;
+    @if $enable-shadows {
+      @include box-shadow($input-box-shadow, $input-focus-box-shadow);
+    } @else {
+      // Avoid using mixin so we can pass custom focus shadow properly
+      box-shadow: $input-focus-box-shadow;
+    }
+  }
+
+  // Placeholder
+  &::placeholder {
+    color: $input-placeholder-color;
+  }
+
+  // Disabled inputs
+  //
+  // HTML5 says that controls under a fieldset > legend:first-child won't be
+  // disabled if the fieldset is disabled. Due to implementation difficulty, we
+  // don't honor that edge case; we style them as disabled anyway.
+  &:disabled {
+    color: $input-disabled-color;
+    background-color: $input-disabled-bg;
+    border-color: $input-disabled-border-color;
+  }
+
+  // File input buttons theming
+  &::file-selector-button {
+    color: $form-file-button-color;
+    @include gradient-bg($form-file-button-bg);
+    border-color: inherit;
+  }
+
+  &:hover:not(:disabled):not([readonly])::file-selector-button {
+    background-color: $form-file-button-hover-bg;
+  }
+}
+
+// Readonly controls as plain text
+//
+// Apply class to a readonly input to make it appear like regular plain
+// text (without any border, background color, focus indicator)
+
+.form-control-plaintext {
+  color: $input-plaintext-color;
+  background-color: transparent;
+}

global-styles/colors-only-bootstrap/forms/_form-range.scss

@@ -0,0 +1,55 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Range
+//
+// Style range inputs the same across browsers. Vendor-specific rules for pseudo
+// elements cannot be mixed. As such, there are no shared styles for focus or
+// active states on prefixed selectors.
+
+.form-range {
+
+  &::-webkit-slider-thumb {
+    @include gradient-bg($form-range-thumb-bg);
+    border: $form-range-thumb-border;
+    @include box-shadow($form-range-thumb-box-shadow);
+
+    &:active {
+      @include gradient-bg($form-range-thumb-active-bg);
+    }
+  }
+
+  &::-webkit-slider-runnable-track {
+    background-color: $form-range-track-bg;
+    border-color: transparent;
+    @include box-shadow($form-range-track-box-shadow);
+  }
+
+  &::-moz-range-thumb {
+    @include gradient-bg($form-range-thumb-bg);
+    border: $form-range-thumb-border;
+    @include box-shadow($form-range-thumb-box-shadow);
+
+    &:active {
+      @include gradient-bg($form-range-thumb-active-bg);
+    }
+  }
+
+  &::-moz-range-track {
+    background-color: $form-range-track-bg;
+    @include box-shadow($form-range-track-box-shadow);
+  }
+
+  &:disabled {
+    &::-webkit-slider-thumb {
+      background-color: $form-range-thumb-disabled-bg;
+    }
+
+    &::-moz-range-thumb {
+      background-color: $form-range-thumb-disabled-bg;
+    }
+  }
+}

global-styles/colors-only-bootstrap/forms/_form-select.scss

@@ -0,0 +1,40 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Select
+//
+// Replaces the browser default select with a custom one, mostly pulled from
+// https://primer.github.io/.
+
+.form-select {
+  color: $form-select-color;
+  background-color: $form-select-bg;
+  background-image: escape-svg($form-select-indicator);
+  border-color: $form-select-border-color;
+  @include box-shadow($form-select-box-shadow);
+
+  &:focus {
+    border-color: $form-select-focus-border-color;
+    @if $enable-shadows {
+      @include box-shadow($form-select-box-shadow, $form-select-focus-box-shadow);
+    } @else {
+      // Avoid using mixin so we can pass custom focus shadow properly
+      box-shadow: $form-select-focus-box-shadow;
+    }
+  }
+
+  &:disabled {
+    color: $form-select-disabled-color;
+    background-color: $form-select-disabled-bg;
+    border-color: $form-select-disabled-border-color;
+  }
+
+  // Remove outline from select box in FF
+  &:-moz-focusring {
+    color: transparent;
+    text-shadow: 0 0 0 $form-select-color;
+  }
+}

global-styles/colors-only-bootstrap/forms/_form-text.scss

@@ -0,0 +1,13 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// Form text
+//
+
+.form-text {
+  color: $form-text-color;
+}

global-styles/colors-only-bootstrap/forms/_input-group.scss

@@ -0,0 +1,16 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Textual addons
+//
+// Serves as a catch-all element for any text or radio/checkbox input you wish
+// to prepend or append to an input.
+
+.input-group-text {
+  color: $input-group-addon-color;
+  background-color: $input-group-addon-bg;
+  border: $input-border-width solid $input-group-addon-border-color;
+}

global-styles/colors-only-bootstrap/forms/_labels.scss

@@ -0,0 +1,19 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+//
+// Labels
+//
+
+.form-label {
+  color: $form-label-color;
+}
+
+// For use with horizontal and inline forms, when you need the label (or legend)
+// text to align with the form controls.
+.col-form-label {
+  color: $form-label-color;
+}

global-styles/colors-only-bootstrap/forms/_validation.scss

@@ -0,0 +1,18 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// Form validation
+//
+// Provide feedback to users when form field values are valid or invalid. Works
+// primarily for client-side validation via scoped `:invalid` and `:valid`
+// pseudo-classes but also includes `.is-invalid` and `.is-valid` classes for
+// server-side validation.
+
+// scss-docs-start form-validation-states-loop
+@each $state, $data in $form-validation-states {
+  @include form-validation-state($state, $data...);
+}
+// scss-docs-end form-validation-states-loop

global-styles/colors-only-bootstrap/helpers/_color-bg.scss

@@ -0,0 +1,16 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+// stylelint-disable function-name-case
+
+// All-caps `RGBA()` function used because of this Sass bug: https://github.com/sass/node-sass/issues/2251
+@each $color, $value in $theme-colors {
+  $color-rgb: to-rgb($value);
+  .text-bg-#{$color} {
+    color: color-contrast($value) if($enable-important-utilities, !important, null);
+    background-color: RGBA($color-rgb, var(--#{$prefix}bg-opacity, 1)) if($enable-important-utilities, !important, null);
+  }
+}

global-styles/colors-only-bootstrap/helpers/_colored-links.scss

@@ -0,0 +1,18 @@
+/*!
+ * SPDX-FileCopyrightText: Original code: Copyright (c) 2011-2022 Twitter, Inc. + Copyright (c) 2011-2022 The Bootstrap Authors. Modification: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+@each $color, $value in $theme-colors {
+  .link-#{$color} {
+    color: $value !important; // stylelint-disable-line declaration-no-important
+
+    @if $link-shade-percentage != 0 {
+      &:hover,
+      &:focus {
+        color: if(color-contrast($value) == $color-contrast-light, shade-color($value, $link-shade-percentage), tint-color($value, $link-shade-percentage)) !important; // stylelint-disable-line declaration-no-important
+      }
+    }
+  }
+}

global-styles/dark.scss

@@ -22,5 +22,5 @@ body.dark {
   --#{$prefix}body-color: #{$body-color};
   --#{$prefix}body-bg: #{$body-bg};
 
-  @import "~bootstrap";
+  @import "colors-only-bootstrap/bootstrap";
 }