plane/apps/app/styles/editor.css

.ProseMirror {
  position: relative;
}

.ProseMirror {
  word-wrap: break-word;
  white-space: pre-wrap;
  white-space: break-spaces;
  -webkit-font-variant-ligatures: none;
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0; /* the above doesn't seem to work in Edge */
}

.ProseMirror pre {
  white-space: pre-wrap;
}

.ProseMirror li {
  position: relative;
}

.ProseMirror-hideselection *::selection {
  background: transparent;
}
.ProseMirror-hideselection *::-moz-selection {
  background: transparent;
}
.ProseMirror-hideselection {
  caret-color: transparent;
}

.ProseMirror-selectednode {
  outline: 2px solid #8cf;
}

/* Make sure li selections wrap around markers */

li.ProseMirror-selectednode {
  outline: none;
}

li.ProseMirror-selectednode:after {
  content: "";
  position: absolute;
  left: -32px;
  right: -2px;
  top: -2px;
  bottom: -2px;
  border: 2px solid #8cf;
  pointer-events: none;
}

/* Protect against generic img rules */

img.ProseMirror-separator {
  display: inline !important;
  border: none !important;
  margin: 0 !important;
}
.ProseMirror-textblock-dropdown {
  min-width: 3em;
}

.ProseMirror-menu {
  margin: 0 -4px;
  line-height: 1;
}

.ProseMirror-tooltip .ProseMirror-menu {
  width: -webkit-fit-content;
  width: fit-content;
  white-space: pre;
}

.ProseMirror-menuitem {
  margin-right: 3px;
  display: inline-block;
}

.ProseMirror-menuseparator {
  border-right: 1px solid #ddd;
  margin-right: 3px;
}

.ProseMirror-menu-dropdown,
.ProseMirror-menu-dropdown-menu {
  font-size: 90%;
  white-space: nowrap;
}

.ProseMirror-menu-dropdown {
  vertical-align: 1px;
  cursor: pointer;
  position: relative;
  padding-right: 15px;
}

.ProseMirror-menu-dropdown-wrap {
  padding: 1px 0 1px 4px;
  display: inline-block;
  position: relative;
}

.ProseMirror-menu-dropdown:after {
  content: "";
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  opacity: 0.6;
  position: absolute;
  right: 4px;
  top: calc(50% - 2px);
}

.ProseMirror-menu-dropdown-menu,
.ProseMirror-menu-submenu {
  position: absolute;
  background: white;
  color: #666;
  border: 1px solid #aaa;
  padding: 2px;
}

.ProseMirror-menu-dropdown-menu {
  z-index: 15;
  min-width: 6em;
}

.ProseMirror-menu-dropdown-item {
  cursor: pointer;
  padding: 2px 8px 2px 4px;
}

.ProseMirror-menu-dropdown-item:hover {
  background: #f2f2f2;
}

.ProseMirror-menu-submenu-wrap {
  position: relative;
  margin-right: -4px;
}

.ProseMirror-menu-submenu-label:after {
  content: "";
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 4px solid currentColor;
  opacity: 0.6;
  position: absolute;
  right: 4px;
  top: calc(50% - 4px);
}

.ProseMirror-menu-submenu {
  display: none;
  min-width: 4em;
  left: 100%;
  top: -3px;
}

.ProseMirror-menu-active {
  background: #eee;
  border-radius: 4px;
}

.ProseMirror-menu-disabled {
  opacity: 0.3;
}

.ProseMirror-menu-submenu-wrap:hover .ProseMirror-menu-submenu,
.ProseMirror-menu-submenu-wrap-active .ProseMirror-menu-submenu {
  display: block;
}

.ProseMirror-menubar {
  border-top-left-radius: inherit;
  border-top-right-radius: inherit;
  position: relative;
  min-height: 1em;
  color: #666;
  padding: 1px 6px;
  top: 0;
  left: 0;
  right: 0;
  border-bottom: 1px solid silver;
  background: white;
  z-index: 10;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  overflow: visible;
}

.ProseMirror-icon {
  display: inline-block;
  line-height: 0.8;
  vertical-align: -2px; /* Compensate for padding */
  padding: 2px 8px;
  cursor: pointer;
}

.ProseMirror-menu-disabled.ProseMirror-icon {
  cursor: default;
}

.ProseMirror-icon svg {
  fill: currentColor;
  height: 1em;
}

.ProseMirror-icon span {
  vertical-align: text-top;
}
.ProseMirror-gapcursor {
  display: none;
  pointer-events: none;
  position: absolute;
}

.ProseMirror-gapcursor:after {
  content: "";
  display: block;
  position: absolute;
  top: -2px;
  width: 20px;
  border-top: 1px solid black;
  animation: ProseMirror-cursor-blink 1.1s steps(2, start) infinite;
}

@keyframes ProseMirror-cursor-blink {
  to {
    visibility: hidden;
  }
}

.ProseMirror-focused .ProseMirror-gapcursor {
  display: block;
}
/* Add space around the hr to make clicking it easier */

.ProseMirror-example-setup-style hr {
  padding: 2px 10px;
  border: none;
  margin: 1em 0;
}

.ProseMirror-example-setup-style hr:after {
  content: "";
  display: block;
  height: 1px;
  background-color: silver;
  line-height: 2px;
}

.ProseMirror ul,
.ProseMirror ol {
  padding-left: 30px;
}

.ProseMirror blockquote {
  padding-left: 1em;
  border-left: 3px solid #eee;
  margin-left: 0;
  margin-right: 0;
}

.ProseMirror-example-setup-style img {
  cursor: default;
}

.ProseMirror-prompt {
  background: white;
  padding: 5px 10px 5px 15px;
  border: 1px solid silver;
  position: fixed;
  border-radius: 3px;
  z-index: 11;
  box-shadow: -0.5px 2px 5px rgba(0, 0, 0, 0.2);
}

.ProseMirror-prompt h5 {
  margin: 0;
  font-weight: normal;
  font-size: 100%;
  color: #444;
}

.ProseMirror-prompt input[type="text"],
.ProseMirror-prompt textarea {
  background: #eee;
  border: none;
  outline: none;
}

.ProseMirror-prompt input[type="text"] {
  padding: 0 4px;
}

.ProseMirror-prompt-close {
  position: absolute;
  left: 2px;
  top: 1px;
  color: #666;
  border: none;
  background: transparent;
  padding: 0;
}

.ProseMirror-prompt-close:after {
  content: "✕";
  font-size: 12px;
}

.ProseMirror-invalid {
  background: #ffc;
  border: 1px solid #cc7;
  border-radius: 4px;
  padding: 5px 10px;
  position: absolute;
  min-width: 10em;
}

.ProseMirror-prompt-buttons {
  margin-top: 5px;
  display: none;
}
#editor,
.editor {
  background: white;
  color: black;
  background-clip: padding-box;
  border-radius: 4px;
  border: 2px solid rgba(0, 0, 0, 0.2);
  padding: 5px 0;
  margin-bottom: 23px;
}

.ProseMirror p:first-child,
.ProseMirror h1:first-child,
.ProseMirror h2:first-child,
.ProseMirror h3:first-child,
.ProseMirror h4:first-child,
.ProseMirror h5:first-child,
.ProseMirror h6:first-child {
  margin-top: 10px;
}

.ProseMirror {
  padding: 8px 8px 4px 14px;
  line-height: 1.2;
  outline: none;
}

.ProseMirror p {
  margin-bottom: 1em;
}

.remirror-editor-wrapper .remirror-editor {
  min-height: 150px;
}

.issue-comments-section .remirror-editor-wrapper .remirror-editor {
  min-height: 50px;
}

.remirror-editor-wrapper {
  padding-top: 8px;
}

/* heading styling */
.remirror-editor-wrapper h1 {
  font-size: 2rem;
}

.remirror-editor-wrapper h2 {
  font-size: 1.5rem;
}

.remirror-editor-wrapper h3 {
  font-size: 1.17rem;
}
/* end heading styling */

/* list styling */
.remirror-editor-wrapper ul {
  list-style-type: disc;
}

.remirror-editor-wrapper ol {
  list-style-type: decimal;
}
/* end list styling */

/* table styling */
.remirror-editor-wrapper table {
  border-collapse: collapse;
}

.remirror-editor-wrapper table td {
  border: 1px solid #000;
}
/* end table styling */

/* link styling */
.remirror-floating-popover {
  z-index: 20 !important;
}

.remirror-floating-popover input {
  font-size: 0.75rem;
  border-radius: 5px;
  padding: 5px;
  border: 1px solid #a8a6a6;
  box-shadow: 1px 1px 5px #c0bebe;
  outline: none;
}

.remirror-editor-wrapper a {
  color: blue;
  text-decoration: underline;
}
/* end link styling */

/* format buttons styling */
.MuiButtonBase-root {
  border: none !important;
  border-radius: 0.25rem !important;
  padding: 0.25rem !important;
}

.MuiButtonBase-root:hover {
  background-color: rgb(229 231 235);
}

.MuiButtonBase-root svg {
  fill: #000 !important;
}

.MuiButtonBase-root.Mui-selected {
  background-color: rgb(229 231 235) !important;
}
/* end format buttons styling */