:root {
  color-scheme: dark;
  --canvas: #0d0d12;
  --surface: #1a1a24;
  --surface-soft: #232330;
  --surface-hover: #2c2c3d;
  --ink: #f0f0f5;
  --muted: #9ba1a6;
  --line: #333344;
  --accent: #6366f1;
  --accent-strong: #818cf8;
  --accent-soft: rgba(99, 102, 241, 0.15);
  --warning: #f59e0b;
  --warning-soft: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.15);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.2);
  --border-radius: 12px;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 64px;
}

[data-theme="light"] {
  color-scheme: light;
  --canvas: #f5f5f7;
  --surface: #ffffff;
  --surface-soft: #eeeef2;
  --surface-hover: #e4e4ea;
  --ink: #1a1a2e;
  --muted: #6b7280;
  --line: #d1d5db;
  --accent: #6366f1;
  --accent-strong: #4f46e5;
  --accent-soft: rgba(99, 102, 241, 0.1);
  --warning: #d97706;
  --warning-soft: rgba(217, 119, 6, 0.1);
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100dvh;
  background: var(--canvas);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body:has(.app-shell) {
  overflow: hidden;
}

body:not(:has(.app-shell)) {
  height: auto;
  min-height: 100dvh;
  overflow-y: auto;
}

/* Reset and basic elements */
button, input, select, textarea {
  font: inherit;
  color: inherit;
  outline: none;
  border: none;
  background: none;
}

button {
  cursor: pointer;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-strong);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 6px;
  background: var(--surface-soft);
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--line);
  transition: all var(--transition);
}

.secondary-action:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: #55556a;
}

.danger-button {
  background: var(--danger-soft);
  color: var(--danger);
  min-height: 36px;
  padding: 0 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
}

.danger-button:hover:not(:disabled) {
  background: var(--danger);
  color: #fff;
}

.icon-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--muted);
  transition: all var(--transition);
}

.icon-button:hover {
  background: var(--surface-soft);
  color: var(--ink);
}

input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
  background: var(--surface-soft);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea {
  resize: none;
  line-height: 1.5;
}

.eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-strong);
  margin-bottom: 4px;
}

.field-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}

/* Layout */
.app-shell {
  display: flex;
  width: 100%;
  height: 100dvh;
}

/* Sidebar */
.people-panel {
  width: 320px;
  height: 100dvh;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 16px;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.sidebar-divider {
  height: 1px;
  background: var(--line);
  margin: 20px 0;
}

.mt-1 {
  margin-top: 8px;
}

.people-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.people-header strong {
  font-size: 0.9rem;
  color: var(--ink);
}

.invite-row, .name-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.room-actions {
  display: flex;
  gap: 8px;
}

.room-actions button {
  flex: 1;
}

.room-label {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 12px;
  line-height: 1.4;
}

.people-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.person {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 8px;
  background: transparent;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: background var(--transition);
}

.person:hover {
  background: var(--surface-hover);
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 2px var(--surface-soft);
}

/* Main Workspace */
.workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  min-width: 0;
  position: relative;
  background: radial-gradient(circle at top right, rgba(99,102,241,0.05) 0%, transparent 40%),
              radial-gradient(circle at bottom left, rgba(168,85,247,0.05) 0%, transparent 40%);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 20px;
  background: rgba(26, 26, 36, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  z-index: 10;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.room-info h1 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.room-chip {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 4px;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.connection-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 20px;
  background: var(--surface-soft);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warning);
}

.status-dot.online {
  background: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

.status-dot.offline {
  background: var(--danger);
}

.board-tools-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 160px;
  z-index: 20;
}

.dropdown-menu.hidden {
  display: none;
}

.dropdown-menu button {
  text-align: left;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.85rem;
}

.dropdown-menu button:hover {
  background: var(--surface-hover);
}

.dropdown-toggle-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dropdown-toggle-item svg {
  flex-shrink: 0;
}

.dropdown-toggle-item.notif-active {
  color: var(--accent);
}

.dropdown-divider {
  border: none;
  border-top: 1px solid var(--line);
  margin: 4px 0;
}

/* Scroll Area for Messages */
.board-panel {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.board-scroll-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 20px;
  scroll-behavior: smooth;
  /* Customize scrollbar */
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.board-scroll-area::-webkit-scrollbar {
  width: 6px;
}
.board-scroll-area::-webkit-scrollbar-track {
  background: transparent;
}
.board-scroll-area::-webkit-scrollbar-thumb {
  background-color: var(--line);
  border-radius: 10px;
}

.board-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Message Card */
.message-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--border-radius);
  padding: 12px 14px;
  box-shadow: var(--shadow-sm);
  animation: slideIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.1);
  position: relative;
  transition: border-color var(--transition);
}

.message-card:hover {
  border-color: #4a4a5e;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(10px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.message-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.meta-text {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.meta-text .author {
  font-size: 0.95rem;
  color: var(--ink);
}

.meta-text .timestamp {
  font-size: 0.75rem;
  color: var(--muted);
}

.message-options-menu {
  position: relative;
  display: flex;
  gap: 4px;
  align-items: center;
}

.msg-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 4px;
  display: flex;
  flex-direction: column;
  z-index: 10;
  min-width: 120px;
}

.msg-dropdown.hidden {
  display: none;
}

.msg-dropdown button {
  text-align: left;
  padding: 8px 12px;
  font-size: 0.85rem;
  border-radius: 4px;
}

.msg-dropdown button:hover {
  background: var(--surface-hover);
}

.message-text {
  font-size: 0.95rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  color: #e2e2e8;
  margin-bottom: 10px;
}

.expiry-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.expires-label {
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 600;
  width: 60px;
  text-align: right;
}

.expiry-bar {
  flex: 1;
  height: 4px;
  background: var(--surface-soft);
  border-radius: 2px;
  overflow: hidden;
}

.expiry-bar span {
  display: block;
  height: 100%;
  background: var(--accent);
  width: 100%;
  transition: width 1s linear;
}

.edit-form {
  margin-top: 12px;
}

.edit-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

.typing-previews {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.typing-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--surface-soft);
  border-radius: var(--border-radius);
  border-left: 3px solid var(--accent);
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.typing-card p {
  font-size: 0.9rem;
  color: var(--muted);
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

.typing-card strong {
  color: var(--ink);
  margin-right: 4px;
}

/* Composer Panel */
.composer-panel {
  flex-shrink: 0;
  background: rgba(26, 26, 36, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--line);
  padding: 12px 20px 20px 20px;
  z-index: 10;
}

/* Global Utilities */
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.live-preview {
  max-width: 860px;
  margin: 0 auto 12px auto;
  background: var(--surface-soft);
  padding: 10px 16px;
  border-radius: 8px;
  border-left: 3px solid var(--accent-strong);
  max-height: 120px;
  overflow-y: auto;
  scrollbar-width: thin;
}

.live-preview p:last-child {
  font-size: 0.9rem;
  color: var(--muted);
  word-break: break-word;
}

.message-form {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

#message-input {
  max-height: 120px;
  background: var(--surface);
  border-color: var(--line);
  padding: 12px 16px;
  font-size: 0.95rem;
  overflow-y: auto;
  scrollbar-width: thin;
}

.compose-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.message-options {
  display: flex;
  align-items: center;
}

.minimal-select {
  padding: 6px 12px;
  font-size: 0.85rem;
  background: var(--surface-soft);
  border: 1px solid transparent;
  color: var(--ink);
  width: auto;
  cursor: pointer;
}

.minimal-select:hover {
  background: var(--surface-hover);
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.char-count-pill {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--surface-soft);
  padding: 4px 8px;
  border-radius: 12px;
}

#share-button {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  padding: 0;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--surface-hover);
  color: #fff;
  padding: 12px 24px;
  border-radius: 30px;
  font-weight: 500;
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  border: 1px solid var(--line);
}

.toast:not([hidden]) {
  transform: translateX(-50%) translateY(0);
}

/* Markdown Styles */
.message-text h1, .message-text h2, .message-text h3 {
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  font-weight: 700;
  color: var(--ink);
}

.message-text h1 { font-size: 1.4rem; }
.message-text h2 { font-size: 1.2rem; }
.message-text h3 { font-size: 1.1rem; }

.message-text p {
  margin-top: 0;
  margin-bottom: 0.6em;
}
.message-text p:last-child {
  margin-bottom: 0;
}

.message-text a {
  color: var(--accent-strong);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.message-text strong {
  font-weight: 700;
  color: var(--ink);
}

.message-text ul, .message-text ol {
  margin-bottom: 0.8em;
  padding-left: 1.5em;
}

.message-text li {
  margin-bottom: 0.3em;
}

.message-text blockquote {
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  color: var(--muted);
  margin-bottom: 0.8em;
  background: var(--surface-soft);
  padding: 8px 12px;
  border-radius: 0 8px 8px 0;
}

.message-text code {
  font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
  background: var(--surface-hover);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  color: #e879f9;
}

.message-text pre {
  background: var(--canvas);
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 0.8em;
  border: 1px solid var(--line);
}

.message-text pre code {
  background: transparent;
  padding: 0;
  color: var(--ink);
  font-size: 0.9em;
}

/* Pinned and Reply UI Styles */
.pinned-banner {
  background: var(--surface-soft);
  border-bottom: 1px solid var(--accent);
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 5;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: background var(--transition);
}

.pinned-banner:hover {
  background: var(--surface-hover);
}

.pinned-content {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  overflow: hidden;
}

.pinned-text {
  display: flex;
  flex-direction: column;
}

.pinned-text strong {
  font-size: 0.8rem;
  color: var(--accent-strong);
}

.pinned-text p {
  font-size: 0.85rem;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 600px;
}

.reply-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface-hover);
  padding: 8px 12px;
  border-radius: 8px;
  margin-bottom: 8px;
  border-left: 3px solid var(--accent);
}

.reply-context-info {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
}

.reply-icon {
  color: var(--accent);
  font-size: 1.2rem;
}

.reply-context-info strong {
  font-size: 0.75rem;
  color: var(--accent-strong);
  display: block;
}

.reply-context-info p {
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 600px;
}

.message-reply-context {
  background: var(--surface-soft);
  border-left: 3px solid var(--accent);
  padding: 6px 10px;
  border-radius: 0 6px 6px 0;
  margin-bottom: 8px;
  cursor: pointer;
  transition: background var(--transition);
}

.message-reply-context:hover {
  background: var(--surface-hover);
}

.reply-context-author {
  font-size: 0.75rem;
  color: var(--accent-strong);
  display: block;
  margin-bottom: 2px;
}

.reply-context-text {
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Responsive and Mobile Keyboard Handling */
.mobile-only {
  display: none;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100dvh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 90;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

.launch-notice {
  margin: 16px;
  background: var(--warning-soft);
  border: 1px solid var(--warning);
  color: #fbbf24;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
}

@media (max-width: 820px) {
  .mobile-only {
    display: flex;
  }
  
  .desktop-only {
    display: none;
  }

  /* Make sidebar slide over the workspace on mobile */
  .people-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 300px;
    transform: translateX(-100%);
    box-shadow: var(--shadow);
  }

  .people-panel.open {
    transform: translateX(0);
  }
  
  .app-shell {
    flex-direction: column;
  }

  .topbar {
    padding: 0 12px;
  }
  
  .board-scroll-area {
    padding: 12px;
  }
  
  .message-card {
    padding: 12px;
  }
  
  .composer-panel {
    padding: 12px;
  }

  .header-status {
    gap: 6px;
  }

  .connection-card {
    padding: 4px 8px;
    font-size: 0.72rem;
  }
}

/* Ensure empty state looks good */
.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 160px;
  border: 1px dashed var(--line);
  border-radius: var(--border-radius);
  color: var(--muted);
  background: var(--surface-soft);
  text-align: center;
  font-size: 0.95rem;
  padding: 24px;
}

/* File Sharing & Attachments */
.attachment-preview {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-hover);
  padding: 8px 12px;
  border-radius: 8px;
  margin-bottom: 8px;
  border-left: 3px solid var(--accent);
}

.attachment-preview .attachment-icon {
  font-size: 1.2rem;
}

#attachment-name {
  flex: 1;
  font-size: 0.85rem;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.message-attachment-container {
  margin-bottom: 12px;
}

.message-image-preview {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
  border: 1px solid var(--line);
  object-fit: cover;
  display: block;
}

.message-file-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--canvas);
  border: 1px solid var(--line);
  padding: 12px;
  border-radius: 8px;
  max-width: 400px;
}

.message-file-box .file-icon {
  font-size: 1.5rem;
}

.message-file-box .file-name {
  flex: 1;
  font-size: 0.9rem;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.message-file-box .file-download {
  font-size: 0.8rem;
  padding: 6px 12px;
}

/* Lightbox Modal */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.lightbox.hidden {
  display: none;
}

.lightbox-toolbar {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  gap: 0.5rem;
  z-index: 1001;
}

.lightbox-toolbar .icon-button {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-radius: 50%;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-toolbar .icon-button:hover {
  background: rgba(255, 255, 255, 0.2);
}

#lightbox-img {
  max-width: 90%;
  max-height: 90vh;
  object-fit: contain;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  border-radius: 8px;
}

/* Image container with download overlay */
.image-preview-wrapper {
  position: relative;
  display: inline-block;
}

.image-preview-wrapper .image-overlay-download {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 0.8rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
  display: flex;
  align-items: center;
  gap: 4px;
}

.image-preview-wrapper:hover .image-overlay-download {
  opacity: 1;
}

.image-preview-wrapper .image-overlay-download:hover {
  background: rgba(0, 0, 0, 0.8);
}

/* Markdown specific styling */
.message-text pre {
  background: #1e1e24; /* Fallback for highlight.js */
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 8px 0;
  font-size: 0.9rem;
  border: 1px solid var(--line);
}

.message-text code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* Inline code */
.message-text p code {
  background: var(--surface-hover);
  padding: 2px 4px;
  border-radius: 4px;
  font-size: 0.9em;
}

/* SEO Footer */
.sidebar-footer {
  margin-top: auto;
  padding: 16px;
  background-color: var(--surface);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.4;
}
.sidebar-footer strong {
  color: var(--text);
  font-weight: 600;
}
.sidebar-footer .seo-tags {
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--muted);
  opacity: 0.7;
}

/* Drag and Drop Overlay */
.drag-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(13, 13, 18, 0.9);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none; /* Let drops pass through to the document */
}

.drag-overlay.hidden {
  display: none;
}

.drag-content {
  text-align: center;
  color: var(--accent);
  pointer-events: none;
  border: 4px dashed var(--accent);
  border-radius: 16px;
  padding: 48px;
  background: var(--surface-soft);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
  0% { border-color: rgba(99, 102, 241, 0.5); }
  50% { border-color: rgba(99, 102, 241, 1); }
  100% { border-color: rgba(99, 102, 241, 0.5); }
}

/* General Modal Styles */
.modal-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  background: rgba(13, 13, 18, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  padding: env(safe-area-inset-top, 16px) env(safe-area-inset-right, 16px) env(safe-area-inset-bottom, 16px) env(safe-area-inset-left, 16px);
  box-sizing: border-box;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.modal-overlay.hidden {
  display: none;
}

.modal-content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  color: var(--text);
  max-width: 400px;
  width: 100%;
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  box-sizing: border-box;
  margin: auto;
  position: relative;
  animation: modal-pop 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modal-pop {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(6px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.modal-close-icon {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s;
}

.modal-close-icon:hover {
  color: var(--text);
  background: var(--surface-hover);
}

/* ============================================
   VOICE NOTES
   ============================================ */

/* Mic Button */
#voice-note-btn {
  transition: color 0.2s, background 0.2s;
}
#voice-note-btn:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}
#voice-note-btn.is-recording {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.15);
  animation: mic-pulse 1.2s ease-in-out infinite;
}

@keyframes mic-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

/* Recording Banner */
.voice-recording-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 10px;
  margin: 0 0 8px 0;
  gap: 12px;
}
.voice-recording-banner.hidden {
  display: none;
}

.voice-recording-content {
  display: flex;
  align-items: center;
  gap: 10px;
}

.voice-rec-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ef4444;
  flex-shrink: 0;
  animation: rec-blink 1s ease-in-out infinite;
}

@keyframes rec-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}

.voice-rec-timer {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ef4444;
  font-variant-numeric: tabular-nums;
  min-width: 36px;
}

.voice-rec-label {
  font-size: 0.82rem;
  color: var(--muted);
}

.voice-rec-cancel {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.voice-rec-cancel:hover {
  background: rgba(239, 68, 68, 0.2);
}

/* Inline Audio Player (in message bubbles) */
.voice-note-player {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: 10px;
  margin-top: 2px;
  min-width: 200px;
  max-width: 280px;
}

.voice-play-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, transform 0.15s;
}
.voice-play-btn:hover {
  background: #818cf8;
  transform: scale(1.08);
}
.voice-play-btn:active {
  transform: scale(0.95);
}

.voice-progress-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.voice-progress-bar {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
  cursor: pointer;
  position: relative;
}
.voice-progress-bar:hover {
  height: 6px;
}

.voice-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0%;
  transition: width 0.1s linear;
}

.voice-time-label {
  font-size: 0.72rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  display: flex;
  justify-content: space-between;
}

.voice-note-icon {
  font-size: 0.75rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 2px;
}

@media (max-width: 480px) {
  .form-actions {
    gap: 8px;
  }
  #share-button {
    width: 40px;
    height: 40px;
  }
  .char-count-pill {
    padding: 4px 6px;
    font-size: 0.7rem;
  }
  .modal-overlay {
    padding: 12px;
  }
  .modal-content {
    padding: 18px 16px !important;
    border-radius: 16px;
    max-height: calc(100dvh - 24px);
  }
  .notif-setting-row {
    padding: 8px 10px;
  }
  .notif-setting-title {
    font-size: 0.88rem;
  }
  .notif-setting-desc {
    font-size: 0.72rem;
  }
}

@media (max-height: 650px) {
  .modal-overlay {
    align-items: flex-start;
    padding: 10px;
  }
  .modal-content {
    max-height: calc(100dvh - 20px);
    padding: 16px 14px !important;
    margin: 0 auto;
  }
  .notif-setting-row {
    padding: 6px 8px;
  }
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  overflow: hidden;
}

.theme-toggle svg {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: inline-block; }

/* Notification Bell */
.notif-toggle.notif-active {
  color: var(--accent);
}

.notif-toggle.notif-active svg {
  filter: drop-shadow(0 0 4px var(--accent));
}

/* Light mode specific overrides */
[data-theme="light"] .composer-panel {
  background: rgba(245, 245, 247, 0.9);
}

[data-theme="light"] .people-panel {
  background: #ffffff;
}

[data-theme="light"] .topbar {
  background: rgba(245, 245, 247, 0.9);
}

[data-theme="light"] body {
  background: #f5f5f7;
}

[data-theme="light"] .message-card {
  background: #ffffff;
  border-color: #e5e7eb;
}

[data-theme="light"] .msg-dropdown {
  background: #ffffff;
  border-color: #e5e7eb;
}

[data-theme="light"] .msg-dropdown button:hover {
  background: #f3f4f6;
}

[data-theme="light"] .dropdown-menu {
  background: #ffffff;
  border-color: #e5e7eb;
}

[data-theme="light"] .dropdown-menu button:hover {
  background: #f3f4f6;
}

[data-theme="light"] input,
[data-theme="light"] textarea,
[data-theme="light"] select {
  background: #f9fafb;
  border-color: #d1d5db;
  color: #1a1a2e;
}

[data-theme="light"] .room-chip {
  background: rgba(99, 102, 241, 0.08);
}

[data-theme="light"] .voice-recording-banner {
  background: rgba(245, 245, 247, 0.95);
}

[data-theme="light"] #pw-modal .modal-content {
  background: #ffffff;
  border-color: #e5e7eb;
}

[data-theme="light"] #qr-modal .modal-content {
  background: #ffffff;
  border-color: #e5e7eb;
}

[data-theme="light"] #lightbox {
  background: rgba(0, 0, 0, 0.6);
}

[data-theme="light"] .expiry-row .expiry-bar {
  background: #e5e7eb;
}

[data-theme="light"] .expiry-row .expiry-bar span {
  background: var(--accent);
}

[data-theme="light"] .expires-label {
  color: #6b7280;
}

[data-theme="light"] .connection-card {
  background: #eeeef2;
}

[data-theme="light"] .toast {
  background: #1a1a2e;
  color: #ffffff;
}

[data-theme="light"] .pinned-banner {
  background: rgba(99, 102, 241, 0.06);
  border-color: #d1d5db;
}

[data-theme="light"] .message-reply-context {
  background: #f3f4f6;
  border-left-color: var(--accent);
}

[data-theme="light"] .empty-state {
  background: #ffffff;
  border-color: #d1d5db;
}

[data-theme="light"] .attachment-preview {
  background: #f3f4f6;
}

[data-theme="light"] .voice-note-player {
  background: #f3f4f6;
}

[data-theme="light"] .reply-banner {
  background: rgba(99, 102, 241, 0.06);
  border-color: #d1d5db;
}

[data-theme="light"] .typing-card {
  background: #f3f4f6;
  border-color: #e5e7eb;
}

/* Light mode: Icon buttons visibility */
[data-theme="light"] .icon-button {
  color: #4b5563;
}

[data-theme="light"] .icon-button:hover {
  color: #1a1a2e;
  background: #e5e7eb;
}

/* Light mode: Message text readability */
[data-theme="light"] .message-text {
  color: #1a1a2e;
}

[data-theme="light"] .message-text p {
  color: #1a1a2e;
}

[data-theme="light"] .message-card .author {
  color: #1a1a2e;
}

[data-theme="light"] .message-card .timestamp {
  color: #6b7280;
}

/* Light mode: Send button */
[data-theme="light"] #share-button {
  background: var(--accent);
  color: #ffffff;
}

[data-theme="light"] #share-button svg {
  stroke: #ffffff;
}

/* Light mode: Sidebar */
[data-theme="light"] .sidebar-header {
  border-bottom-color: #e5e7eb;
}

[data-theme="light"] .people-panel label,
[data-theme="light"] .people-panel p,
[data-theme="light"] .people-panel span {
  color: #4b5563;
}

[data-theme="light"] .people-panel strong,
[data-theme="light"] .people-panel h2,
[data-theme="light"] .people-panel h3 {
  color: #1a1a2e;
}

[data-theme="light"] .people-panel .sidebar-footer {
  border-top-color: #e5e7eb;
}

[data-theme="light"] .people-panel .sidebar-footer a {
  color: #6b7280;
}

/* Light mode: Notification bell & theme toggle */
[data-theme="light"] .notif-toggle {
  color: #6b7280;
}

[data-theme="light"] .notif-toggle:hover {
  color: #1a1a2e;
}

[data-theme="light"] .theme-toggle {
  color: #6b7280;
}

[data-theme="light"] .theme-toggle:hover {
  color: #1a1a2e;
}

/* Light mode: Quick copy & menu buttons on message cards */
[data-theme="light"] .quick-copy-btn,
[data-theme="light"] .quick-download-btn,
[data-theme="light"] .msg-menu-btn {
  color: #9ca3af;
}

[data-theme="light"] .quick-copy-btn:hover,
[data-theme="light"] .quick-download-btn:hover,
[data-theme="light"] .msg-menu-btn:hover {
  color: #4b5563;
  background: #e5e7eb;
}

/* Light mode: Composer area */
[data-theme="light"] .message-input-wrapper textarea {
  color: #1a1a2e;
}

[data-theme="light"] .message-input-wrapper textarea::placeholder {
  color: #9ca3af;
}

[data-theme="light"] .char-count-pill {
  background: #eeeef2;
  color: #6b7280;
}

/* Light mode: Buttons */
[data-theme="light"] .btn-primary {
  background: var(--accent);
  color: #ffffff;
}

[data-theme="light"] .secondary-action {
  background: #eeeef2;
  color: #4b5563;
}

[data-theme="light"] .secondary-action:hover {
  background: #e5e7eb;
}

/* Light mode: Code blocks in messages */
[data-theme="light"] .message-text pre {
  background: #f3f4f6;
  border-color: #e5e7eb;
}

[data-theme="light"] .message-text code {
  background: #f3f4f6;
  color: #e11d48;
}

/* Light mode: File attachment cards */
[data-theme="light"] .message-file-box {
  background: #f3f4f6;
  border-color: #e5e7eb;
}

[data-theme="light"] .notif-setting-row:hover {
  background: rgba(0,0,0,0.04);
}

/* ── Notification Settings Modal ── */
.notif-settings-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.notif-setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s;
}

.notif-setting-row:hover {
  background: rgba(255,255,255,0.04);
}

.notif-setting-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.notif-setting-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
}

.notif-setting-desc {
  font-size: 0.75rem;
  color: var(--muted);
}

/* iOS-style toggle switch */
.toggle-switch {
  -webkit-appearance: none;
  appearance: none;
  width: 46px;
  height: 26px;
  border-radius: 26px;
  background: var(--border);
  position: relative;
  cursor: pointer;
  transition: background 0.25s ease;
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: white;
  transition: transform 0.25s ease;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.toggle-switch:checked {
  background: var(--accent);
}

.toggle-switch:checked::after {
  transform: translateX(20px);
}

/* ── QR Scanner ── */
.qr-scanner-content {
  max-width: 360px;
  padding: 24px;
}

.qr-scanner-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
}

.qr-scanner-viewport video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.qr-scanner-frame {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 65%;
  height: 65%;
  transform: translate(-50%, -50%);
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  pointer-events: none;
}

.qr-scanner-frame::after {
  content: '';
  position: absolute;
  top: 0;
  left: 5%;
  right: 5%;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent), 0 0 24px var(--accent);
  animation: qr-scan-line 2.5s ease-in-out infinite;
  border-radius: 2px;
}

@keyframes qr-scan-line {
  0%, 100% { top: 0; }
  50% { top: calc(100% - 2px); }
}

.qr-scanner-status {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.7);
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.75rem;
  white-space: nowrap;
  backdrop-filter: blur(4px);
}

.qr-scanner-success {
  background: rgba(16, 185, 129, 0.9) !important;
}

/* ── Own Message Styling ── */
.message-card.is-own {
  border-left: 3px solid var(--accent, #6366f1);
  background: rgba(99, 102, 241, 0.04);
}

.message-card.is-own:hover {
  border-color: var(--accent, #6366f1);
  border-left-color: var(--accent, #6366f1);
}

[data-theme="light"] .message-card.is-own {
  background: rgba(99, 102, 241, 0.05);
  border-left-color: var(--accent, #6366f1);
}

/* ── Delete Confirmation Overlay ── */
.delete-confirm-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  border-radius: var(--border-radius, 10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  animation: fadeIn 0.15s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.delete-confirm-box {
  text-align: center;
  padding: 16px 24px;
}

.delete-confirm-box p {
  margin: 0 0 4px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
}

.delete-confirm-hint {
  display: block;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 14px;
}

.delete-confirm-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.delete-confirm-cancel {
  padding: 7px 18px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}

.delete-confirm-cancel:hover {
  background: rgba(255, 255, 255, 0.2);
}

.delete-confirm-yes {
  padding: 7px 18px;
  border-radius: 8px;
  border: none;
  background: #ef4444;
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.delete-confirm-yes:hover {
  background: #dc2626;
}