multica/packages/views/editor/content-editor.css

/*
 * ContentEditor typography — ProseMirror styles using shadcn design tokens.
 *
 * Design tier: "Compact" (same tier as Linear, Slack). Optimized for short-form
 * content (issue descriptions, comments) that users scan, not long-form reading.
 *
 * Typography values benchmarked against (April 2026):
 *   - github-markdown-css (GitHub's markdown renderer)
 *   - @tailwindcss/typography prose-sm preset
 *   - Linear's editor (Tiptap-based, 14px body)
 *
 * Key decisions:
 *   Body: 14px (text-sm), line-height 1.625 (between GitHub 1.5 and Tailwind 1.714)
 *   Headings: h1=22px (1.57x), h2=18px (1.29x), h3=15px (1.07x) — compact but
 *     with clear hierarchy. Previous h3 was 14px (same as body = no differentiation).
 *   Paragraph spacing: 10px (was 8px; GitHub uses 10px, Tailwind prose-sm uses 16px)
 *   List indent: 20px for ul (was 16px; standard is 22-32px)
 *   Code block margin: 12px (was 8px; gives breathing room between code and prose)
 *   Blockquote border: 3px (was 2px; GitHub/Tailwind both use 4px)
 *   Links: var(--brand) blue with 40% opacity underline (was var(--primary) near-black)
 *
 * Inline elements (mention cards, inline code) that exceed line-height:
 *   The browser auto-expands the line box for lines containing taller inline
 *   elements. Controlled via vertical-align on [data-node-view-wrapper] and
 *   box-decoration-break: clone on inline code.
 */

.rich-text-editor.ProseMirror {
  color: var(--foreground);
  caret-color: var(--foreground);
}

.rich-text-editor.ProseMirror:focus {
  outline: none;
}

/* Placeholder */
.rich-text-editor .is-editor-empty:first-child::before {
  content: attr(data-placeholder);
  float: left;
  color: var(--muted-foreground);
  pointer-events: none;
  height: 0;
}

/* Headings — compact but with clear visual hierarchy */
.rich-text-editor h1 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.rich-text-editor h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.rich-text-editor h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

/* Paragraphs */
.rich-text-editor p {
  margin-top: 0.625rem;
  margin-bottom: 0.625rem;
  line-height: 1.625;
}

/* First child should not have top margin */
.rich-text-editor > *:first-child {
  margin-top: 0;
}

/* Last child should not have bottom margin */
.rich-text-editor > *:last-child {
  margin-bottom: 0;
}

/* Lists */
.rich-text-editor ul {
  list-style-type: disc;
  padding-inline-start: 1.25rem;
  padding-inline-end: 0.5rem;
  margin: 0.5rem 0;
}

.rich-text-editor ol {
  list-style-type: decimal;
  padding-inline-start: 1.5rem;
  margin: 0.5rem 0;
}

.rich-text-editor li {
  margin: 0.25rem 0;
  line-height: 1.625;
}

.rich-text-editor li + li {
  margin-top: 0.25rem;
}

.rich-text-editor li::marker {
  color: var(--muted-foreground);
}

/* Remove paragraph margins inside list items (Tiptap wraps li content in <p>) */
.rich-text-editor li > p {
  margin: 0;
}

.rich-text-editor li > p + p {
  margin-top: 0.25rem;
}

.rich-text-editor .math-node {
  display: inline-flex;
  max-width: 100%;
  vertical-align: middle;
}

.rich-text-editor .math-node.inline {
  align-items: center;
}

.rich-text-editor .math-node.block {
  display: block;
  margin: 0.75rem 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.rich-text-editor .math-node.block .katex-display {
  margin: 0;
}

.rich-text-editor .math-node .katex {
  max-width: 100%;
}

/* Nested lists — bullet style progression and tighter spacing */
.rich-text-editor ul ul {
  list-style-type: circle;
  margin: 0.25rem 0;
}

.rich-text-editor ul ul ul {
  list-style-type: square;
}

.rich-text-editor ol ol {
  list-style-type: lower-alpha;
  margin: 0.25rem 0;
}

.rich-text-editor ol ol ol {
  list-style-type: lower-roman;
}

/* Inline code */
.rich-text-editor code {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.875rem;
  background: color-mix(in srgb, var(--foreground) 3%, transparent);
  border: 1px solid color-mix(in srgb, var(--foreground) 5%, transparent);
  color: color-mix(in srgb, var(--foreground) 75%, transparent);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  line-height: 2;
}

/* Code blocks */
.rich-text-editor pre {
  font-family: var(--font-mono, ui-monospace, monospace);
  background: var(--muted);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  overflow-x: auto;
}

.rich-text-editor pre code {
  background: none;
  border: none;
  color: var(--foreground);
  padding: 0;
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* Mermaid diagrams */
.rich-text-editor .mermaid-diagram {
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 0.75rem 0;
  overflow-x: auto;
  padding: 1rem;
  position: relative;
}

.rich-text-editor .mermaid-diagram-frame {
  border: 0;
  display: block;
  height: auto;
  width: 100%;
}

.rich-text-editor .mermaid-diagram-loading,
.rich-text-editor .mermaid-diagram-error p {
  color: var(--muted-foreground);
  font-size: 0.8125rem;
  margin: 0;
}

.rich-text-editor .mermaid-diagram-error pre {
  margin-bottom: 0;
}

/* Mermaid toolbar — dark pill, top-right corner, appears on hover */
.rich-text-editor .mermaid-diagram-toolbar {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: flex;
  gap: 1px;
  padding: 0.25rem;
  background: color-mix(in srgb, black 75%, transparent);
  backdrop-filter: blur(8px);
  border-radius: var(--radius);
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 1;
}

.rich-text-editor .mermaid-diagram:hover .mermaid-diagram-toolbar,
.rich-text-editor .mermaid-diagram-toolbar:focus-within {
  opacity: 1;
}

.rich-text-editor .mermaid-diagram-toolbar button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: calc(var(--radius) - 2px);
  color: white;
  transition: background 0.15s;
}

.rich-text-editor .mermaid-diagram-toolbar button:hover {
  background: color-mix(in srgb, white 15%, transparent);
}

/* Mermaid lightbox — full-screen preview (ESC or click backdrop to close) */
.mermaid-diagram-lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, black 80%, transparent);
  cursor: zoom-out;
}

.mermaid-diagram-lightbox-frame {
  border: 0;
  width: 90vw;
  height: 90vh;
  background: transparent;
  cursor: default;
}

/* Syntax highlighting — lowlight (hljs) */
.rich-text-editor .hljs-keyword,
.rich-text-editor .hljs-selector-tag,
.rich-text-editor .hljs-built_in { color: oklch(0.55 0.16 255); }

.rich-text-editor .hljs-string,
.rich-text-editor .hljs-addition { color: oklch(0.55 0.14 155); }

.rich-text-editor .hljs-comment,
.rich-text-editor .hljs-quote { color: var(--muted-foreground); font-style: italic; }

.rich-text-editor .hljs-number,
.rich-text-editor .hljs-literal { color: oklch(0.58 0.16 30); }

.rich-text-editor .hljs-title,
.rich-text-editor .hljs-section,
.rich-text-editor .hljs-title\.function_ { color: oklch(0.55 0.14 280); }

.rich-text-editor .hljs-attr,
.rich-text-editor .hljs-attribute { color: oklch(0.58 0.12 60); }

.rich-text-editor .hljs-variable,
.rich-text-editor .hljs-template-variable { color: oklch(0.58 0.14 20); }

.rich-text-editor .hljs-type,
.rich-text-editor .hljs-title\.class_ { color: oklch(0.55 0.14 200); }

.rich-text-editor .hljs-deletion { color: oklch(0.55 0.2 25); }

.rich-text-editor .hljs-meta { color: var(--muted-foreground); }

/* XML / HTML — lowlight emits .hljs-tag for `<` `>` brackets and .hljs-name
   for the element name. Without these rules, HTML source renders mostly in
   the default text color and looks unhighlighted. */
.rich-text-editor .hljs-tag { color: var(--muted-foreground); }
.rich-text-editor .hljs-name { color: oklch(0.55 0.16 255); }

/* Dark mode overrides */
.dark .rich-text-editor .hljs-keyword,
.dark .rich-text-editor .hljs-selector-tag,
.dark .rich-text-editor .hljs-built_in { color: oklch(0.7 0.14 255); }

.dark .rich-text-editor .hljs-string,
.dark .rich-text-editor .hljs-addition { color: oklch(0.7 0.14 155); }

.dark .rich-text-editor .hljs-number,
.dark .rich-text-editor .hljs-literal { color: oklch(0.72 0.14 30); }

.dark .rich-text-editor .hljs-title,
.dark .rich-text-editor .hljs-section,
.dark .rich-text-editor .hljs-title\.function_ { color: oklch(0.72 0.12 280); }

.dark .rich-text-editor .hljs-attr,
.dark .rich-text-editor .hljs-attribute { color: oklch(0.72 0.1 60); }

.dark .rich-text-editor .hljs-variable,
.dark .rich-text-editor .hljs-template-variable { color: oklch(0.72 0.12 20); }

.dark .rich-text-editor .hljs-type,
.dark .rich-text-editor .hljs-title\.class_ { color: oklch(0.72 0.12 200); }

.dark .rich-text-editor .hljs-deletion { color: oklch(0.7 0.18 25); }

.dark .rich-text-editor .hljs-name { color: oklch(0.72 0.14 255); }

/* Tables */
.rich-text-editor .tableWrapper {
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.rich-text-editor table {
  min-width: 100%;
  border-collapse: collapse;
}

.rich-text-editor colgroup {
  display: none;
}

.rich-text-editor thead {
  background: color-mix(in srgb, var(--muted) 50%, transparent);
}

.rich-text-editor tbody tr {
  border-top: 1px solid var(--border);
}

.rich-text-editor tr:hover td {
  background: color-mix(in srgb, var(--muted) 30%, transparent);
  transition: background 0.15s;
}

.rich-text-editor th,
.rich-text-editor td {
  text-align: left;
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
}

.rich-text-editor th {
  font-weight: 600;
}

/* Remove paragraph margin inside table cells */
.rich-text-editor th p,
.rich-text-editor td p {
  margin: 0;
}

/* Blockquotes */
.rich-text-editor blockquote {
  border-left: 3px solid color-mix(in srgb, var(--muted-foreground) 30%, transparent);
  padding-left: 0.75rem;
  margin: 0.625rem 0;
  color: var(--muted-foreground);
  font-style: italic;
}

.rich-text-editor blockquote p {
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
}

.rich-text-editor blockquote > *:first-child {
  margin-top: 0;
}

.rich-text-editor blockquote > *:last-child {
  margin-bottom: 0;
}

.rich-text-editor blockquote blockquote {
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
  border-left-color: color-mix(in srgb, var(--muted-foreground) 15%, transparent);
}

/* Horizontal rules */
.rich-text-editor hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1rem 0;
}

/* Links */
.rich-text-editor a {
  color: var(--brand);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--brand) 40%, transparent);
  text-underline-offset: 2px;
  cursor: pointer;
}

.rich-text-editor a:hover {
  text-decoration-color: var(--brand);
}

/* Issue mention cards — inline cards that sit within text flow */
.rich-text-editor a.issue-mention {
  color: inherit;
  text-decoration: none;
}

.rich-text-editor a.issue-mention:hover {
  text-decoration: none;
}

/* Mentions */
.rich-text-editor .mention {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
  margin: 0 0.125rem;
}

/* Strong / emphasis */
.rich-text-editor strong {
  font-weight: 600;
}

.rich-text-editor em {
  font-style: italic;
}

.rich-text-editor s,
.rich-text-editor del {
  text-decoration: line-through;
  color: var(--muted-foreground);
}

/* Readonly mode overrides */
.rich-text-editor.readonly.ProseMirror {
  caret-color: transparent;
  cursor: default;
}

/* Mention NodeView inline layout fix */
.rich-text-editor [data-node-view-wrapper] {
  display: inline;
  vertical-align: middle;
}

/* Block-level NodeViews (fileCard) need to override the inline default above */
.rich-text-editor .file-card-node {
  display: block !important;
}

/* Images — generic fallback (non-NodeView contexts) */
.rich-text-editor img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 0.5rem 0;
}

/* Image — shared by the editor NodeView AND standalone surfaces (chat
 * messages, comment-card AttachmentList). De-scoped from `.rich-text-editor`
 * during the <Attachment> unification so every call site renders identical
 * visuals without each component carrying its own Tailwind override. */

.image-figure {
  position: relative;
  display: inline-block;
  margin: 0.75rem 0;
}

.image-figure[data-clickable="true"] {
  cursor: zoom-in;
}

.image-figure.image-selected .image-content {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.image-content {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.image-uploading {
  opacity: 0.5;
  animation: rte-upload-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes rte-upload-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.3; }
}

.image-toolbar {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: flex;
  gap: 1px;
  padding: 0.25rem;
  background: color-mix(in srgb, black 75%, transparent);
  backdrop-filter: blur(8px);
  border-radius: var(--radius);
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 1;
}

.image-figure:hover .image-toolbar {
  opacity: 1;
}

.image-toolbar button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: calc(var(--radius) - 2px);
  color: white;
  transition: background 0.15s;
}

.image-toolbar button:hover {
  background: color-mix(in srgb, white 15%, transparent);
}

/* Editor-only overrides: center the figure inside the NodeView and cap
 * width so an oversize paste doesn't blow out the editor column. */

.rich-text-editor .image-node {
  display: block !important;
  text-align: center;
}

.rich-text-editor .image-figure {
  max-width: min(100%, 640px);
}

/* Bubble menu — floating toolbar pill */
.bubble-menu {
  display: flex;
  align-items: center;
  gap: 1px;
  padding: 0.25rem;
  background: var(--popover);
  border: 1px solid color-mix(in srgb, var(--foreground) 10%, transparent);
  border-radius: var(--radius);
  box-shadow:
    0 4px 12px color-mix(in srgb, black 12%, transparent),
    0 0 0 1px color-mix(in srgb, black 4%, transparent);
}

/* Link edit mode — inline URL input */
.bubble-menu-link-edit {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem;
  background: var(--popover);
  border: 1px solid color-mix(in srgb, var(--foreground) 10%, transparent);
  border-radius: var(--radius);
  box-shadow:
    0 4px 12px color-mix(in srgb, black 12%, transparent),
    0 0 0 1px color-mix(in srgb, black 4%, transparent);
  min-width: 300px;
}

/* Link hover card — shows URL + actions on link hover */
.link-hover-card {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.25rem 0.25rem 0.5rem;
  background: var(--popover);
  border: 1px solid color-mix(in srgb, var(--foreground) 10%, transparent);
  border-radius: var(--radius);
  box-shadow:
    0 4px 12px color-mix(in srgb, black 12%, transparent),
    0 0 0 1px color-mix(in srgb, black 4%, transparent);
  max-width: min(360px, calc(100vw - 2rem));
  white-space: nowrap;
}