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;
}

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

// Pad out bottom of editor
.page-content.mce-content-body > :last-child {
  margin-bottom: 5rem;
}

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


/**
 * 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;
}
.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: $mono !important;
  border: 1px solid #DDD !important;
  background-color: #EEE !important;
  padding: 4px 6px !important;
}
.tox-menu .tox-collection__item-label {
  line-height: normal !important;
}