/* Slack workspace additional styles */

/* Date Separator */
.date-separator {
  display: flex;
  align-items: center;
  margin: 24px 0 16px 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.date-separator::before,
.date-separator::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border-primary);
}

.date-separator span {
  padding: 0 16px;
  white-space: nowrap;
}

/* Typing indicator shared by workspace, /messages, and the chat dock */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  min-height: 18px;
  color: var(--color-text-secondary, rgba(44, 41, 37, 0.62));
  font-size: 13px;
  line-height: 1.25;
  box-sizing: border-box;
  flex-shrink: 0;
}

.typing-indicator[hidden] {
  display: none !important;
}

.typing-dots {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  width: 17px;
  flex-shrink: 0;
}

.typing-dots span {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.45;
  animation: typing-indicator-bounce 1.2s ease-in-out infinite;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

.typing-indicator-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-composer > .typing-indicator,
.chat-float-input > .typing-indicator,
.wsv2-composer > .typing-indicator {
  padding: 0 0 8px;
  margin-top: -2px;
}

.conversation-page > .typing-indicator,
.chat-float-main > .typing-indicator,
.wsv2-main > .typing-indicator {
  padding: 0 var(--spacing-lg, 16px) 8px;
}

@keyframes typing-indicator-bounce {
  0%, 80%, 100% {
    transform: translateY(0);
    opacity: 0.45;
  }
  40% {
    transform: translateY(-3px);
    opacity: 0.9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .typing-dots span {
    animation: none;
    opacity: 0.65;
  }
}

.message {
  display: flex !important;
  flex-direction: row !important;
  align-items: flex-start;
  gap: var(--chat-row-gap);
  padding: var(--chat-padding-y) var(--spacing-md);
  transition: background var(--transition-normal);
  position: relative;
  background: transparent;
  border-radius: var(--radius-lg);
  margin-bottom: 0;
}

.message:hover {
  background: var(--chat-hover-bg);
}

.message:hover .message-actions-bar {
  opacity: 1;
}

.message-avatar {
  align-self: flex-start;
  aspect-ratio: auto;
  width: var(--chat-avatar-size);
  height: var(--chat-avatar-size);
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
  cursor: pointer;
  text-decoration: none;
}

.message-avatar:hover {
  opacity: 0.85;
}

.message-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.message-avatar .avatar-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-text-primary);
  color: var(--color-text-inverse);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
}

.message-content-wrapper {
  flex: 1;
  min-width: 0;
}

.message-header {
  display: flex;
  align-items: baseline;
  gap: var(--chat-header-gap);
  margin-bottom: 0;
}

.message-author {
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
}

.message-author:hover {
  color: var(--color-text-primary);
  text-decoration: underline;
}

.message-timestamp {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1;
}

.message-edited {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1;
}

.message-content {
  font-size: var(--font-size-base);
  line-height: var(--chat-content-line-height);
  color: var(--color-text-primary);
  word-wrap: break-word;
  margin-top: var(--spacing-xs);
}

.message-content a[href^="http"] {
  color: var(--color-accent);
  text-decoration: none;
}
.message-content a[href^="http"]:hover {
  text-decoration: underline;
}

/* Hide raw file links until post-render transforms them into cards */
.rendered-markdown-content a[href*="/file/"]:not(.msg-file-card),
.rendered-markdown-content a[href*="backblaze"]:not(.msg-file-card) {
  visibility: hidden;
  height: 0;
  display: block;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

/* File attachment cards (Slack-style box) */
.msg-file-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  margin: 6px 0;
  background: var(--color-bg-primary, #fff);
  border: 1px solid var(--color-border-primary, #E0E0E0);
  border-radius: 8px;
  text-decoration: none !important;
  color: var(--color-text-primary) !important;
  max-width: 400px;
  transition: background 0.12s;
}
.msg-file-card:hover {
  background: var(--color-bg-secondary, #F5F5F5);
}
.msg-file-icon {
  flex-shrink: 0;
  width: 36px;
  height: 40px;
  color: var(--color-accent, #5C6F5B);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-subtle, #DDE5DC);
  border-radius: 6px;
}
.msg-file-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.msg-file-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.msg-file-card:hover .msg-file-name {
  text-decoration: underline;
  color: var(--color-accent, #5C6F5B);
}
.msg-file-size {
  font-size: 12px;
  color: var(--color-text-tertiary, #8A8A8A);
}

.message-content p {
  margin: 0 0 4px 0;
  font-size: inherit;
}

.message-content p:last-child {
  margin-bottom: 0;
}

/* Twemoji inline emoji alignment */
.message-content img.emoji {
  height: 1.2em;
  width: 1.2em;
  vertical-align: -0.2em;
  margin: 0 1px;
  display: inline;
}

.message-content code {
  background: var(--color-bg-secondary, #F0F2F5);
  border: 1px solid var(--color-border-primary, #DCE0E5);
  border-radius: 3px;
  padding: 2px 4px;
  font-family: Monaco, Menlo, Consolas, monospace;
  font-size: 13px;
}

.message-content strong {
  font-weight: 700;
}

.message-content em {
  font-style: italic;
}

/* Message Edit Form */
.message-edit-form {
  margin-top: 8px;
  display: block;
  width: 100%;
}

.edit-message-input {
  width: 100%;
  padding: 8px 12px;
  border: 2px solid var(--color-text-primary, #1D2433);
  border-radius: 4px;
  font-size: 15px;
  font-family: inherit;
  line-height: 1.46668;
  resize: none;
  outline: none;
  min-height: 60px;
  box-sizing: border-box;
  background: var(--color-bg-primary, #fff);
  color: var(--color-text-primary, #1D2433);
  display: block;
}

.edit-message-input:focus {
  border-color: var(--color-text-primary, #1D2433);
  box-shadow: 0 0 0 1px var(--color-text-primary, #1D2433);
}

.message-edit-actions,
.edit-message-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  align-items: center;
}

.btn-save-edit,
.save-edit-btn,
.btn-cancel-edit,
.cancel-edit-btn {
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.2s;
}

.btn-save-edit,
.save-edit-btn {
  background: var(--accent-color);
  color: var(--color-text-inverse);
}

.btn-save-edit:hover:not(:disabled),
.save-edit-btn:hover:not(:disabled) {
  background: var(--color-accent-dark, #445E50);
}

.btn-save-edit:disabled,
.save-edit-btn:disabled {
  background: var(--color-border-primary, #DCE0E5);
  cursor: not-allowed;
}

.btn-cancel-edit,
.cancel-edit-btn {
  background: transparent;
  color: var(--color-text-primary, #1D2433);
  border: 1px solid var(--color-text-tertiary, #7C8694);
}

.btn-cancel-edit:hover:not(:disabled),
.cancel-edit-btn:hover:not(:disabled) {
  background: var(--color-bg-secondary, #F0F2F5);
}

.btn-cancel-edit:disabled,
.cancel-edit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Delete Modal Styles */
.modal-content-small {
  max-width: 440px;
}

.mention {
  background: rgba(90, 122, 106, 0.1);
  color: var(--accent-color);
  padding: 2px 4px;
  border-radius: 3px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.mention:hover {
  background: rgba(90, 122, 106, 0.2);
  text-decoration: underline;
}

.message-reactions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 4px;
}

.reaction-item {
  background: var(--color-bg-primary, #fff);
  border: 1px solid var(--color-border-primary, #DCE0E5);
  border-radius: 16px;
  padding: 4px 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 4px;
}

.reaction-item:hover {
  background: var(--color-bg-secondary, #F0F2F5);
  border-color: var(--color-accent, #5C6F5B);
}

.reaction-item.user-reacted {
  background: var(--color-bg-primary, #fff);
  border-color: color-mix(in srgb, var(--color-accent, #5C6F5B) 70%, var(--color-border-primary, #DCE0E5));
  color: var(--color-text-primary, #2C2925);
  font-weight: 600;
}

.reaction-item.user-reacted:hover {
  background: var(--color-bg-secondary, #F0F2F5);
  border-color: var(--color-accent, #5C6F5B);
}

/* ── Inline thread summary + expansion (shared by course Q&A and announcements) ── */

.message-thread-summary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-accent);
  cursor: pointer;
  transition: background var(--transition-normal);
}

.message-thread-summary:hover {
  background: color-mix(in srgb, var(--color-accent) 8%, transparent);
}

.message-thread-summary svg {
  flex-shrink: 0;
}

.message-inline-thread {
  margin-left: calc(var(--chat-avatar-size) + var(--chat-row-gap));
  padding-left: var(--spacing-md);
  border-left: 2px solid var(--color-border-secondary);
  margin-bottom: var(--spacing-sm);
}

.message-inline-thread[hidden] { display: none; }

.message-inline-thread .message {
  padding-left: 0;
}

/* Thread Preview */
.thread-preview {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0 4px 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--color-text-secondary, #5E6978);
  cursor: pointer;
  transition: all 0.2s;
}

.thread-preview:hover {
  background: var(--color-bg-secondary, #F0F2F5);
  border-color: var(--color-border-primary, #DCE0E5);
}

.thread-preview-avatars {
  display: flex;
  align-items: center;
  margin-left: -4px;
}

.thread-participant-avatar {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  border: 2px solid var(--color-bg-primary, #fff);
  margin-left: -4px;
  object-fit: cover;
}

.thread-participant-avatar.avatar-placeholder {
  background: var(--color-text-primary, #1D2433);
  color: var(--color-text-inverse);
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thread-preview-text {
  flex: 1;
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-secondary, #5E6978);
}

.thread-preview-count {
  color: var(--color-accent, var(--accent-color));
  font-weight: 600;
}

.thread-preview-last {
  color: var(--color-text-secondary, #5E6978);
  font-size: 12px;
}

.thread-preview-arrow {
  color: var(--color-text-secondary, #5E6978);
  display: flex;
  align-items: center;
}

.thread-preview:hover .thread-preview-arrow {
  color: var(--accent-color);
}

.message-actions-bar {
  position: absolute;
  top: -12px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 2px;
  opacity: 0;
  transition: opacity 0.2s;
  background: var(--color-bg-primary, #fff);
  border: 1px solid var(--color-border-primary, #DCE0E5);
  border-radius: 6px;
  padding: 2px;
  box-shadow: 0 1px 3px rgba(44, 41, 37, 0.12), 0 1px 2px rgba(44, 41, 37, 0.24);
  z-index: 10;
}

.action-bar-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border-primary, #DCE0E5);
  margin: 0 2px;
  flex: 0 0 auto;
}

.message-action-btn {
  background: transparent;
  border: none;
  border-radius: 4px;
  padding: 6px 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: 13px;
  color: var(--color-text-secondary, #5E6978);
  transition: background 0.2s, color 0.2s, transform 0.12s ease-out;
  min-height: 28px;
  min-width: 28px;
}

.message-action-btn:hover {
  background: var(--color-bg-secondary, #F0F2F5);
  color: var(--color-text-primary, #1D2433);
}

.message-action-btn svg {
  width: 16px;
  height: 16px;
}

/* Quick react buttons show emoji larger */
.quick-react-btn {
  font-size: 16px;
  line-height: 1;
  min-width: 30px;
  padding: 4px 6px;
}

.quick-react-btn:hover {
  background: var(--color-bg-secondary, #F0F2F5);
  transform: scale(1.1);
}

.quick-react-btn img.emoji,
.quick-react-btn img.twemoji {
  width: 18px;
  height: 18px;
}

.reply-count {
  font-size: 12px;
  color: var(--color-text-secondary, #5E6978);
  font-weight: 600;
}

.no-messages {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-secondary, #5E6978);
}

.no-messages p:first-child {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.error-message {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-danger, #8A6060);
  font-size: 15px;
}

/* Emoji picker popup */
.emoji-picker-popup {
  background: var(--color-bg-primary, #fff);
  border: 1px solid var(--color-border-primary, #DCE0E5);
  border-radius: 8px;
  padding: 8px;
  box-shadow: 0 4px 12px rgba(44, 41, 37, 0.15);
  display: flex;
  gap: 4px;
  z-index: var(--z-dock-popover, 10020);
}

.emoji-option {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  transition: background 0.2s;
}

.emoji-option:hover {
  background: var(--color-bg-secondary, #F0F2F5);
}

/* ── Link Preview Cards (Androma page/theorem unfurling) ── */
.link-preview-card {
  display: flex;
  gap: 0;
  margin-top: 6px;
  max-width: 400px;
  background: var(--color-bg-secondary, #F0F2F5);
  border-radius: 0 var(--radius-md, 6px) var(--radius-md, 6px) 0;
  overflow: hidden;
  transition: background 0.15s;
}
.link-preview-card:hover {
  background: var(--color-bg-tertiary, #E8E7E3);
}
.link-preview-card .lpc-bar {
  width: 3px;
  flex-shrink: 0;
  background: var(--accent-color, #5C6F5B);
}
.link-preview-card .lpc-body {
  padding: 8px 12px;
  min-width: 0;
}
.link-preview-card .lpc-domain {
  font-size: 11px;
  color: var(--color-text-tertiary, #7C8694);
  margin-bottom: 2px;
}
.link-preview-card .lpc-title {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-color, #5C6F5B);
  text-decoration: none;
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.link-preview-card .lpc-title:hover {
  text-decoration: underline;
}
.link-preview-card .lpc-desc {
  font-size: 13px;
  color: var(--color-text-secondary, #5E6978);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Unread divider (shared between dock + workspace) ── */
.wsv2-unread-divider {
  display: flex;
  align-items: center;
  margin: 12px 0 8px;
  user-select: none;
}
.wsv2-unread-divider::before,
.wsv2-unread-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-danger, #8A6060);
}
.wsv2-unread-divider span {
  padding: 0 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-danger, #8A6060);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ── Pinned message indicator ──────────────────────────────
   The persistent state is a soft row background plus a small pin marker
   beside the timestamp. The JS flash can clear without erasing the state.
*/
.message:has(.wsv2-pinned-label) {
  background: rgba(90, 122, 106, 0.08);
}

.message:has(.wsv2-pinned-label):hover {
  background: rgba(90, 122, 106, 0.12);
}

@supports (background: color-mix(in srgb, white 50%, transparent)) {
  .message:has(.wsv2-pinned-label) {
    background: color-mix(in srgb, var(--color-accent, #5C6F5B) 8%, transparent);
  }

  .message:has(.wsv2-pinned-label):hover {
    background: color-mix(in srgb, var(--color-accent, #5C6F5B) 12%, transparent);
  }
}

.wsv2-pinned-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  line-height: 1;
  color: var(--color-accent);
  vertical-align: -1px;
  user-select: none;
}

.wsv2-pinned-label svg {
  width: 11px;
  height: 11px;
  display: block;
  flex-shrink: 0;
}

.message-grouped-ts .wsv2-pinned-label {
  position: absolute;
  left: calc(100% + 2px);
  top: 50%;
  width: 10px;
  height: 10px;
  transform: translateY(-50%);
  opacity: 1;
}

.message-grouped-ts .wsv2-pinned-label svg {
  width: 9px;
  height: 9px;
}

/* Responsive design */
@media (max-width: 768px) {
  .slack-workspace {
    flex-direction: column;
  }
  
  .slack-sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border-primary, #DCE0E5);
  }
  
  .message-actions-bar {
    opacity: 1;
  }
  
  /* On mobile, thread panel overlays instead of split */
  .thread-panel {
    width: 100% !important;
    z-index: 1001;
  }
  
  .slack-main.thread-open {
    margin-right: 0 !important;
  }
}

/* Scrollbar styling */
.messages-area::-webkit-scrollbar {
  width: 8px;
}

.messages-area::-webkit-scrollbar-track {
  background: var(--color-bg-secondary, #F0F2F5);
}

.messages-area::-webkit-scrollbar-thumb {
  background: var(--color-border-primary, #DCE0E5);
  border-radius: 4px;
}

.messages-area::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary, #7C8694);
}

/* Channel item hover effects */
.add-channels {
  font-style: italic;
  opacity: 0.8;
}

.add-channels:hover {
  opacity: 1;
}

/* Loading state */
.loading-messages .spinner {
  animation: spin 1s linear infinite;
}

.loading-older-messages {
  display: flex;
  justify-content: center;
  padding: 12px;
}

.loading-older-messages .spinner-small {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(0,0,0,0.08);
  border-top-color: var(--color-accent, #5a7a6a);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* Section collapse — scoped to messaging sidebar */
.workspace-sidebar .section-content {
  max-height: 1000px;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.workspace-sidebar .section-content.collapsed {
  max-height: 0;
}

/* Thread Panel - Split Pane Layout */
.thread-panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 450px;
  background: var(--color-bg-primary, #fff);
  border-left: 1px solid var(--color-border-primary, #DCE0E5);
  display: none;
  flex-direction: column;
  z-index: 10;
}

.thread-panel.open {
  display: flex;
}

/* Disable transition when resizing */
.thread-panel.resizing {
  transition: none;
}

/* When thread is open, adjust main content area */
.slack-main.thread-open {
  margin-right: 450px;
  transition: margin-right 0.3s ease;
}

.slack-main.thread-open.resizing {
  transition: none;
}

/* Resize Handle */
.thread-resize-handle {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 8px;
  cursor: col-resize;
  background: transparent;
  z-index: 10;
  transition: background 0.2s;
}

.thread-resize-handle:hover,
.thread-resize-handle.dragging {
  background: rgba(44, 41, 37, 0.13);
}

.thread-resize-handle::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 40px;
  background: rgba(44, 41, 37, 0.3);
  border-radius: 1px;
  opacity: 0;
  transition: opacity 0.2s;
}

.thread-resize-handle:hover::before,
.thread-resize-handle.dragging::before {
  opacity: 1;
}

.thread-header {
  padding: 20px;
  border-bottom: 1px solid var(--color-border-primary, #DCE0E5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-bg-secondary, #F0F2F5);
}

.thread-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.thread-close-btn {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--color-text-secondary, #5E6978);
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.thread-close-btn:hover {
  background: var(--color-bg-secondary, #F0F2F5);
}

.thread-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.thread-parent-message {
  padding: 16px;
  background: var(--color-bg-secondary, #F0F2F5);
  border-radius: 8px;
  margin-bottom: 20px;
}

.thread-parent-message .message-header {
  margin-bottom: 8px;
}

.thread-replies {
  margin-top: 20px;
}

.thread-reply {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  transition: background 0.2s;
  border-radius: 4px;
  margin: 0 -8px;
  padding: 12px 8px;
  position: relative;
}

.thread-reply:hover {
  background: var(--color-bg-secondary, #F0F2F5);
}

.thread-reply .message-avatar {
  width: 32px;
  height: 32px;
}

.thread-reply-content {
  flex: 1;
}

.thread-reply .message-actions-bar {
  position: absolute;
  top: -8px;
  right: 8px;
  opacity: 0;
  transition: opacity 0.2s;
  margin-top: 0;
}

.thread-reply:hover .message-actions-bar {
  opacity: 1;
}

.thread-reply .message-reactions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.thread-reply .reaction-item {
  background: var(--color-bg-primary, #fff);
  border: 1px solid var(--color-border-primary, #DCE0E5);
  border-radius: 16px;
  padding: 3px 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 4px;
}

.thread-reply .reaction-item:hover {
  background: var(--color-bg-secondary, #F0F2F5);
  border-color: var(--accent-color);
  transform: scale(1.05);
}

.thread-divider {
  display: flex;
  align-items: center;
  margin: 20px 0;
  color: var(--color-text-secondary, #5E6978);
  font-size: 13px;
  font-weight: 600;
}

.thread-divider::before,
.thread-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border-primary, #DCE0E5);
}

.thread-divider::before {
  margin-right: 12px;
}

.thread-divider::after {
  margin-left: 12px;
}

.thread-input-container {
  border-top: 1px solid var(--color-border-primary, #DCE0E5);
  padding: 16px;
  background: var(--color-bg-secondary, #F0F2F5);
}

.thread-input-wrapper {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.thread-input-wrapper textarea {
  flex: 1;
  border: 1px solid var(--color-border-primary, #DCE0E5);
  border-radius: 4px;
  padding: 8px 12px;
  font-family: inherit;
  font-size: 14px;
  resize: none;
  max-height: 120px;
}

.thread-input-wrapper textarea:focus {
  outline: none;
  border-color: var(--color-text-primary, #1D2433);
}

.thread-send-btn {
  background: var(--color-text-primary, #1D2433);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 8px 16px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
}

.thread-send-btn:hover {
  background: var(--color-primary-hover, #1A1816);
}

.thread-send-btn:disabled {
  background: var(--color-border-primary, #DCE0E5);
  cursor: not-allowed;
}

/* Reply count badge */
.reply-count {
  display: inline-block;
  background: var(--color-bg-secondary, #F0F2F5);
  color: var(--color-text-secondary, #5E6978);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 10px;
  margin-left: 4px;
  font-weight: 600;
}

/* Thread indicator on hover */
.message:hover .reply-thread-btn {
  color: var(--color-text-primary, #1D2433);
}

/* Overlay - only for mobile, hidden on desktop */
.thread-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(44, 41, 37, 0.5);
  z-index: 9;
  display: none;
}

@media (max-width: 768px) {
  .thread-overlay.visible {
    display: block;
  }
}

/* ── Message Grouping (continuation messages) ── */
/* When consecutive messages are from the same user within 5 min,
   subsequent messages collapse into compact "grouped" form —
   no avatar or header, with a hover-timestamp on the left.       */

.message.message-grouped {
  padding-top: 1px !important;
  padding-bottom: 1px !important;
  min-height: 0;
}

/* Kill extra paragraph margin inside grouped messages for tight stacking */
.message-grouped .message-content p {
  margin-top: 0;
  margin-bottom: 0;
}

/* The hover-timestamp sits in the avatar column area */
.message-grouped-ts {
  position: relative;
  width: 36px;
  flex-shrink: 0;
  font-size: 10px;
  color: var(--color-text-secondary, #5E6978);
  text-align: center;
  line-height: 22px;
  opacity: 0;
  transition: opacity 0.15s ease;
  user-select: none;
  white-space: nowrap;
  overflow: visible;
  align-self: center;
}

.message-grouped:hover .message-grouped-ts {
  opacity: 1;
}

/* Match the inline mobile media-queries that shrink avatars */
@media (max-width: 768px) {
  .message-grouped-ts {
    width: 32px;
  }
}

@media (max-width: 375px) {
  .message-grouped-ts {
    width: 28px;
    font-size: 9px;
  }
}

/* ── Anonymous messages ────────────────────────────────────── */

.message-avatar-anon {
  cursor: default;
}

.message-author-anon {
  color: var(--color-text-secondary, #4a4540);
  font-weight: 600;
  cursor: default;
}

.message-anon-badge {
  font-size: var(--font-size-xs, 11px);
  color: var(--color-text-tertiary, #8a8580);
  font-style: italic;
  margin-left: 4px;
}

/* ── Anonymous toggle (workspace + course Q&A) ─────────────── */

.wsv2-anon-toggle {
  padding: 4px 12px;
  border-bottom: 1px solid var(--color-border, rgba(44, 41, 37, 0.08));
}

.wsv2-anon-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm, 13px);
  color: var(--color-text-secondary, #4a4540);
  cursor: pointer;
  user-select: none;
}

.wsv2-anon-label input[type="checkbox"] {
  margin: 0;
  cursor: pointer;
}

.wsv2-anon-label svg {
  flex-shrink: 0;
  color: var(--color-text-tertiary, #8a8580);
}

.wsv2-anon-label input[type="checkbox"]:checked ~ span {
  color: var(--color-text-primary, #2c2925);
  font-weight: 500;
}

/* ── Issue / Q&A actions row (Close / Reopen / Assign) ────────── */
/* Lives in the composer at the same level as the anonymous toggle.
   When the channel allows anonymous posting, the toggle is moved into
   this row (via .wsv2-anon-inline) so we have a single meta-action stripe
   instead of two. */
.wsv2-issue-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-bottom: 1px solid var(--color-border, rgba(44, 41, 37, 0.08));
}

/* Anon toggle when inlined into the issue-actions row — strip its standalone
   chrome (its own border, padding) so it integrates with the surrounding row. */
.wsv2-anon-inline {
  padding: 0 !important;
  border-bottom: none !important;
  margin-right: 8px;
}
.wsv2-anon-inline .wsv2-anon-label {
  font-size: var(--font-size-sm);
}
.wsv2-issue-action {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border: 1px solid var(--color-border-primary, rgba(44, 41, 37, 0.12));
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-secondary);
  font: inherit;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.wsv2-issue-action:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
  text-decoration: none;
}
.wsv2-issue-action--close {
  color: var(--color-success);
  border-color: color-mix(in srgb, var(--color-success) 30%, transparent);
}
.wsv2-issue-action--close:hover {
  background: color-mix(in srgb, var(--color-success) 8%, transparent);
  color: var(--color-success);
}
.wsv2-issue-action--reopen {
  color: var(--color-accent);
  border-color: color-mix(in srgb, var(--color-accent) 30%, transparent);
}
.wsv2-issue-action--reopen:hover {
  background: color-mix(in srgb, var(--color-accent) 8%, transparent);
  color: var(--color-accent);
}
.wsv2-issue-action--link {
  margin-left: auto;
  border-color: transparent;
  color: var(--color-text-tertiary);
}

/* Anchored assign-picker popover (reuses .wsv2-ctx-menu for the shell) */
.wsv2-assign-menu {
  padding: 4px;
}
.wsv2-assign-row {
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
}
.wsv2-assign-avatar {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.wsv2-assign-avatar--initials {
  background: var(--color-bg-secondary);
  color: var(--color-text-tertiary);
  font-size: 10px;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
}
.wsv2-assign-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  overflow: hidden;
}
.wsv2-assign-name {
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.wsv2-assign-role {
  font-size: 11px;
  color: var(--color-text-tertiary);
}
.wsv2-assign-check {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  color: var(--color-accent);
  display: inline-flex;
}
.wsv2-assign-row.is-current .wsv2-assign-name {
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
}
.wsv2-assign-divider {
  height: 1px;
  background: var(--color-border-primary);
  margin: 4px 6px;
}
.wsv2-assign-row--unassign {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}
.wsv2-assign-row--unassign:hover {
  color: var(--color-danger);
}

/* ── Message context menu (right-click) ─────────────────────── */

.mvc-context-menu {
  background: var(--color-bg-primary, #fff);
  border: 1px solid var(--color-border-primary, #DCE0E5);
  border-radius: 8px;
  padding: 4px;
  min-width: 200px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12), 0 1px 4px rgba(0, 0, 0, 0.08);
  animation: mvc-ctx-fadein 0.1s ease-out;
}

@keyframes mvc-ctx-fadein {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.mvc-ctx-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 7px 12px;
  border: none;
  border-radius: 5px;
  background: none;
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text-primary, #1D2433);
  text-align: left;
  transition: background 0.1s;
  line-height: 1.3;
}

.mvc-ctx-item:hover {
  background: var(--color-bg-hover, #F0F2F5);
}

.mvc-ctx-quick-reactions {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  margin-bottom: 2px;
}

.mvc-ctx-quick-reaction {
  width: 36px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  transition: background 0.12s ease-out, transform 0.12s ease-out;
}

.mvc-ctx-quick-reaction:hover {
  background: var(--color-bg-hover, #F0F2F5);
  transform: translateY(-1px);
}

.mvc-ctx-quick-reaction img.emoji,
.mvc-ctx-quick-reaction img.twemoji {
  width: 20px;
  height: 20px;
}

.mvc-ctx-item.mvc-ctx-danger {
  color: var(--color-danger, #d32f2f);
}

.mvc-ctx-item.mvc-ctx-danger:hover {
  background: rgba(211, 47, 47, 0.08);
}

.mvc-ctx-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-text-secondary, #5E6978);
}

.mvc-ctx-chevron {
  margin-left: auto;
  color: var(--color-text-tertiary, #8B949E);
  font-size: 16px;
  line-height: 1;
}

.mvc-ctx-danger .mvc-ctx-icon {
  color: var(--color-danger, #d32f2f);
}

.mvc-ctx-divider {
  height: 1px;
  margin: 4px 8px;
  background: var(--color-border-primary, #DCE0E5);
}/* ── Skeleton rows shown during channel switch ──────────────── */
.message-skeleton-list {
  padding: var(--spacing-xs) 0;
}

.message--skeleton {
  pointer-events: none;
}

.message--skeleton .message-avatar {
  background: var(--color-bg-tertiary, #ECECEC);
  align-self: flex-start;
  width: var(--chat-avatar-size);
  height: var(--chat-avatar-size);
  aspect-ratio: auto;
}

.message--skeleton .message-header {
  gap: var(--chat-header-gap);
  margin-bottom: var(--spacing-xs);
}

.skeleton-block {
  display: inline-block;
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary, #ECECEC) 0%,
    var(--color-bg-hover, #F4F4F4) 50%,
    var(--color-bg-tertiary, #ECECEC) 100%
  );
  background-size: 200% 100%;
  border-radius: var(--radius-sm, 4px);
  animation: msg-skeleton-shimmer 1.4s ease-in-out infinite;
  vertical-align: middle;
}

.skeleton-name {
  width: 90px;
  height: 12px;
}

.skeleton-time {
  width: 48px;
  height: 10px;
  opacity: 0.7;
}

.skeleton-line {
  display: block;
  height: 12px;
  margin-top: 6px;
  max-width: 720px;
}

@keyframes msg-skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .skeleton-block { animation: none; }
}

/* ===================
   Structured system events (lock/assign/status/label)
   Rendered inline in the message stream as a centered, low-intensity row.
   Source: src/routes/{issues,theorems,labels}.js insert is_system_message
   rows with JSON content; renderer in slack/message-renderer.js parses
   and produces .message-event.
   =================== */

.message-event {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 16px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-text-secondary, #57606a);
}

.message-event .msg-event-icon {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-tertiary, #8b949e);
  flex-shrink: 0;
}

.message-event .msg-event-icon svg {
  display: block;
}

.message-event .msg-event-actor {
  font-weight: 600;
  color: var(--color-text-primary, #1f2328);
  text-decoration: none;
}

.message-event .msg-event-actor:hover {
  text-decoration: underline;
}

.message-event .msg-event-text {
  color: var(--color-text-secondary, #57606a);
}

.message-event .msg-event-text strong {
  font-weight: 600;
  color: var(--color-text-primary, #1f2328);
}

.message-event .msg-event-time {
  font-size: 11px;
  color: var(--color-text-tertiary, #8b949e);
  margin-left: 4px;
}

.message-event .msg-event-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  padding: 1px 7px;
  border-radius: 999px;
  border: 1px solid transparent;
  line-height: 1.4;
  vertical-align: middle;
}

/* View-as-student switcher (in course-chrome) */