BookStack/resources/sass/_tinymce.scss

// Custom full screen mode
.tox.tox-fullscreen {
  position: fixed;
  top: 0;
  height: 100%;
  width: 100%;
  max-width: 100%;
  z-index: 100;
}

// In editor body overrides
.page-content.mce-content-body {
  padding-block-start: 1rem;
  padding-block-end: 1rem;
  outline: 0;
  display: block;
}

// Default styles for our custom root nodes
.page-content.mce-content-body doc-root {
  display: block;
}
.page-content.mce-content-body code-block {
  display: block;
}

// In editor line height override
.page-content.mce-content-body p {
  line-height: 1.6;
}

// Pad out bottom of editor
body.page-content.mce-content-body  {
  padding-bottom: 5rem;
}

// Remove svg background line in toolbar items
.tox .tox-pop__dialog .tox-toolbar {
  background: transparent !important;
}

// Center toolbar items
.tox-toolbar__primary {
  justify-content: center;
}

// Prevent scroll jumps on codemirror clicks
.page-content.mce-content-body code-block > * {
  pointer-events: none;
}
.page-content.mce-content-body code-block pre {
  display: none;
}

// Details/summary editor usability
.page-content.mce-content-body details summary {
  pointer-events: none;
}
.page-content.mce-content-body details doc-root {
  padding: $-s;
  margin-left: (2px - $-s);
  margin-right: (2px - $-s);
  margin-bottom: (2px - $-s);
  margin-top: (2px - $-s);
  overflow: hidden;
}

/**
 * Dark Mode Overrides
 */
.dark-mode .tox .tox-toolbar__primary,
.dark-mode .tox .tox-menu,
.dark-mode .tox .tox-dialog__header,
.dark-mode .tox .tox-dialog,
.dark-mode .tox .tox-dialog__footer,
.dark-mode .tox .tox-pop__dialog,
.dark-mode .tox.tox-tinymce-aux .tox-toolbar__overflow {
    background-color: #333 !important;
}
.dark-mode .tox .tox-tbtn svg,
.dark-mode .tox .tox-tbtn,
.dark-mode .tox .tox-collection--list .tox-collection__item--active:not(.tox-collection__item--state-disabled)
{
  color: #dbdbdb;
  fill: #dbdbdb;
}



/**
 * Format Menu Hacks
 */
.tox .tox-tbtn--bespoke .tox-tbtn__select-label {
  width: 6em !important;
}
.tox-menu .tox-collection__item blockquote::before {
  content: none;
}
.tox-menu .tox-collection__item blockquote {
  border-left: 4px solid var(--color-primary) !important;
  padding: 4px 6px !important;
}
.tox-menu .tox-collection__item blockquote {
  border-left: 4px solid var(--color-primary) !important;
  padding: 4px 6px !important;
}
.tox-menu .tox-collection__item p[style*="background-color"] {
  padding: 4px 6px !important;
  border-left: 3px solid currentColor !important;
}
.tox-menu .tox-collection__item[title^="<"] > div > div {
  font-family: var(--font-code) !important;
  border: 1px solid #DDD !important;
  background-color: #EEE !important;
  padding: 4px 6px !important;
}
.tox-menu .tox-collection__item-label {
  line-height: normal !important;
}

/**
 * Fake task list checkboxes
 */
.page-content.mce-content-body .task-list-item {
  margin-left: 0;
  position: relative;
}
.page-content.mce-content-body .task-list-item > input[type="checkbox"] {
  display: none;
}
.page-content.mce-content-body .task-list-item:before {
  content: '';
  display: inline-block;
  border: 2px solid #CCC;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  margin-right: 8px;
  vertical-align: text-top;
  cursor: pointer;
  position: absolute;
  left: -24px;
  top: 4px;
}

.page-content.mce-content-body .task-list-item[checked]:before {
  background-color: #CCC;
  background-image: url('data:image/svg+xml;utf8,<svg fill="%23FFFFFF" version="1.1" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="m8.4856 20.274-6.736-6.736 2.9287-2.7823 3.8073 3.8073 10.836-10.836 2.9287 2.9287z" stroke-width="1.4644"/></svg>');
  background-position: 50% 50%;
  background-size: 100% 100%;
}