newtab.css

/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  --sidebar-left-width: 240px;
  --sidebar-left-collapsed: 48px;
  --sidebar-right-width: 280px;
  --sidebar-bg: #1a2332;
  --sidebar-text: #c8d6e8;
  --sidebar-hover: #243040;
  --sidebar-active: #2d4a6b;
  --sidebar-accent: #4a9eff;
  --main-bg: #f0f2f5;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.12);
  --text-primary: #1a202c;
  --text-secondary: #718096;
  --text-muted: #a0aec0;
  --collection-header-bg: #edf2f7;
  --right-sidebar-bg: #f8fafc;
  --right-sidebar-border: #e2e8f0;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* ===========================
   Reset & Base
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--main-bg);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ===========================
   Three-Panel Layout
   =========================== */
#app {
  display: grid;
  grid-template-columns: var(--sidebar-left-width) 1fr var(--sidebar-right-width);
  grid-template-rows: 100vh;
  height: 100vh;
  overflow: hidden;
}

/* ===========================
   Sidebar — Shared
   =========================== */
.sidebar {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.sidebar-header {
  flex-shrink: 0;
  padding: 18px 16px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.sidebar-footer {
  flex-shrink: 0;
  padding: 12px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ===========================
   Left Sidebar — Spaces
   =========================== */
.sidebar-left {
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
}

.app-logo {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Sidebar collapse button */
.sidebar-collapse-btn {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--sidebar-text);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.5;
  transition: opacity 0.15s, background 0.15s;
}

.sidebar-collapse-btn:hover {
  opacity: 1;
  background: var(--sidebar-hover);
}

/* ===========================
   Sidebar Collapsed State
   =========================== */
#app.sidebar-collapsed {
  grid-template-columns: var(--sidebar-left-collapsed) 1fr var(--sidebar-right-width);
}

#app.sidebar-collapsed .sidebar-left {
  overflow: hidden;
}

#app.sidebar-collapsed .sidebar-header {
  padding: 14px 8px;
  justify-content: center;
}

#app.sidebar-collapsed .app-logo {
  display: none;
}

#app.sidebar-collapsed .sidebar-collapse-btn {
  transform: rotate(180deg);
  opacity: 0.7;
}

#app.sidebar-collapsed .spaces-list {
  padding: 4px 0;
}

#app.sidebar-collapsed .space-item {
  padding: 10px 0;
  justify-content: center;
  gap: 0;
}

#app.sidebar-collapsed .space-name,
#app.sidebar-collapsed .space-item .btn-icon {
  display: none;
}

#app.sidebar-collapsed .space-icon {
  width: 28px;
  height: 28px;
  font-size: 13px;
}

#app.sidebar-collapsed .sidebar-footer {
  padding: 6px 4px;
}

#app.sidebar-collapsed .sidebar-footer-btn {
  justify-content: center;
  padding: 8px 0;
  gap: 0;
}

#app.sidebar-collapsed .sidebar-footer-label {
  display: none;
}

#app.sidebar-collapsed .sidebar-footer-icon {
  font-size: 16px;
}

#app.sidebar-collapsed .sidebar-footer-row {
  display: none;
}

/* Transition for smooth collapse */
.sidebar-left {
  transition: width 0.2s ease;
}

#app {
  transition: grid-template-columns 0.2s ease;
}

.spaces-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.spaces-list::-webkit-scrollbar {
  width: 4px;
}

.spaces-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
}

.space-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border-radius: 0;
  cursor: pointer;
  color: var(--sidebar-text);
  font-size: 13.5px;
  transition: background 0.12s;
  user-select: none;
}

.space-item:hover {
  background: var(--sidebar-hover);
}

.space-item.active {
  background: var(--sidebar-active);
  color: #ffffff;
}

.space-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--sidebar-accent);
  border-radius: 0 2px 2px 0;
}

.space-item {
  position: relative;
}

.space-icon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
}

.space-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-icon {
  color: var(--sidebar-text);
  font-size: 20px;
  line-height: 1;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background 0.12s, color 0.12s;
}

.btn-icon:hover {
  background: var(--sidebar-hover);
  color: #ffffff;
}

/* ===========================
   Main Area — Collections
   =========================== */
.main-area {
  background: var(--main-bg);
  overflow-y: auto;
  padding: 16px 20px;
  scrollbar-width: thin;
  scrollbar-color: #c8d6e8 transparent;
}

.main-area::-webkit-scrollbar {
  width: 6px;
}

.main-area::-webkit-scrollbar-thumb {
  background: #c8d6e8;
  border-radius: 3px;
}

.collections-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ===========================
   Collection Section
   =========================== */
.collection {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.collection-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--collection-header-bg);
  border-bottom: 1px solid var(--card-border);
  user-select: none;
  cursor: pointer;
}

.collection-name {
  flex: 1;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.collection-count {
  font-size: 12px;
  color: var(--text-muted);
  background: #e2e8f0;
  padding: 1px 7px;
  border-radius: 10px;
}

.collection-toggle {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: background 0.12s;
}

.collection-toggle:hover {
  background: var(--card-border);
  color: var(--text-secondary);
}

.collection-body {
  padding: 8px 10px;
}

.bookmark-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 6px;
}

/* ===========================
   Bookmark Card
   =========================== */
.bookmark-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 8px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, box-shadow 0.12s;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.bookmark-card:hover {
  background: var(--main-bg);
  border-color: var(--card-border);
  box-shadow: var(--card-shadow-hover);
}

.bookmark-card:hover .bookmark-url {
  opacity: 1;
}

.bookmark-favicon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  object-fit: contain;
  flex-shrink: 0;
}

.bookmark-title {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.3;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.bookmark-url {
  font-size: 11px;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity 0.15s;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Drag-over highlight */
.bookmark-card.drag-over {
  background: #ebf4ff;
  border-color: var(--sidebar-accent);
}

/* ===========================
   Right Sidebar — Open Tabs
   =========================== */
.sidebar-right {
  background: var(--right-sidebar-bg);
  border-left: 1px solid var(--right-sidebar-border);
  color: var(--text-primary);
}

.sidebar-right .sidebar-header {
  border-bottom: 1px solid var(--right-sidebar-border);
}

.sidebar-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tabs-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
  scrollbar-width: thin;
  scrollbar-color: #c8d6e8 transparent;
}

.tabs-list::-webkit-scrollbar {
  width: 4px;
}

.tabs-list::-webkit-scrollbar-thumb {
  background: #c8d6e8;
  border-radius: 2px;
}

.tabs-window-group {
  margin-bottom: 4px;
}

/* Window group header: toggle + label + count + save button */
.tabs-window-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px 5px 8px;
  background: var(--right-sidebar-bg);
  border-bottom: 1px solid var(--right-sidebar-border);
  user-select: none;
}

.tabs-window-toggle {
  flex-shrink: 0;
  font-size: 9px;
  color: var(--text-muted);
  padding: 2px 4px;
  line-height: 1;
  border-radius: 3px;
  transition: background 0.1s;
}

.tabs-window-toggle:hover {
  background: #e2e8f0;
  color: var(--text-primary);
}

.tabs-window-label {
  flex: 1;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.tabs-window-count {
  font-size: 10.5px;
  color: var(--text-muted);
  background: #e2e8f0;
  border-radius: 10px;
  padding: 1px 6px;
  font-weight: 600;
  min-width: 20px;
  text-align: center;
}

.tabs-save-session-btn {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--sidebar-accent);
  padding: 2px 8px;
  border: 1px solid var(--sidebar-accent);
  border-radius: 10px;
  transition: background 0.1s, color 0.1s;
  white-space: nowrap;
}

.tabs-save-session-btn:hover {
  background: var(--sidebar-accent);
  color: #fff;
}

/* Collapsible body */
.tabs-window-body {
  overflow: hidden;
}

.tabs-window-body.collapsed {
  display: none;
}

/* Individual tab row */
.tab-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px 6px 12px;
  cursor: pointer;
  transition: background 0.1s;
}

.tab-item:hover {
  background: #edf2f7;
}

.tab-item.active-tab {
  background: #ebf4ff;
}

.tab-item.dragging {
  opacity: 0.5;
}

.tab-favicon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  border-radius: 3px;
  object-fit: contain;
}

.tab-title {
  flex: 1;
  font-size: 12.5px;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.tab-item.active-tab .tab-title {
  color: #2b6cb0;
  font-weight: 500;
}

/* Close (×) button on each tab row */
.tab-close-btn {
  flex-shrink: 0;
  display: none;
  font-size: 14px;
  line-height: 1;
  color: var(--text-muted);
  padding: 1px 4px;
  border-radius: 3px;
  transition: background 0.1s, color 0.1s;
}

.tab-item:hover .tab-close-btn {
  display: block;
}

.tab-close-btn:hover {
  background: #fed7d7;
  color: #c53030;
}

/* ===========================
   Drag & Drop States
   =========================== */

/* Dragged card becomes semi-transparent */
.bookmark-card.dragging {
  opacity: 0.4;
  pointer-events: none;
}

/* Collection grid highlighted as a drop target */
.bookmark-grid.drop-target {
  border: 2px dashed #4db6ac;
  border-radius: var(--radius-md);
  background: rgba(77, 182, 172, 0.05);
  min-height: 60px;
}

/* Collection header highlighted (for drops onto collapsed collections) */
.collection-header.drop-target {
  outline: 2px dashed #4db6ac;
  outline-offset: -2px;
  border-radius: var(--radius-sm);
  background: rgba(77, 182, 172, 0.08);
}

/* Placeholder card shown while dragging to indicate insertion point */
.bookmark-card.drag-placeholder {
  border: 2px dashed #4db6ac;
  background: rgba(77, 182, 172, 0.08);
  border-radius: var(--radius-md);
  pointer-events: none;
  min-width: 140px;
  min-height: 90px;
}

/* Collection being dragged for reorder */
.collection.dragging {
  opacity: 0.4;
  pointer-events: none;
}

/* Horizontal placeholder line between collections during drag */
.collection-drag-placeholder {
  height: 3px;
  background: #4db6ac;
  border-radius: 2px;
  margin: 4px 0;
}

/* Horizontal placeholder line between spaces during drag */
.space-drag-placeholder {
  height: 3px;
  background: #4db6ac;
  border-radius: 2px;
  margin: 2px 8px;
}

.space-item.dragging {
  opacity: 0.4;
  pointer-events: none;
}

/* Collection header drag affordance */
.collection-header[draggable="true"] {
  cursor: grab;
}

.collection-header[draggable="true"]:active {
  cursor: grabbing;
}

/* Legacy: whole-collection drop target (kept for backward compat) */
.collection.drop-target {
  outline: 2px dashed var(--sidebar-accent);
  outline-offset: -2px;
}

[draggable="true"] {
  cursor: grab;
}

[draggable="true"]:active {
  cursor: grabbing;
}

/* ===========================
   Utility / States
   =========================== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
  gap: 8px;
}

.empty-state-icon {
  font-size: 32px;
  opacity: 0.4;
}

/* ===========================
   Main top bar (search + tags)
   =========================== */
.main-topbar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

/* ===========================
   Search
   =========================== */
.search-wrapper {
  display: flex;
}

.search-input {
  width: 100%;
  max-width: 560px;
  padding: 8px 14px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  font-family: var(--font);
  font-size: 13.5px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-input:focus {
  border-color: var(--sidebar-accent);
  box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.15);
}

/* ===========================
   Tag bar
   =========================== */
.tag-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-bar-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  margin-right: 2px;
}

.tag-chip {
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-family: var(--font);
  background: #e2e8f0;
  color: var(--text-secondary);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.tag-chip:hover {
  background: #cbd5e0;
  color: var(--text-primary);
}

.tag-chip.active {
  background: var(--sidebar-accent);
  color: #fff;
  border-color: var(--sidebar-accent);
}

.tag-chip-clear {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--card-border);
}

.tag-chip-clear:hover {
  background: #fed7d7;
  color: #c53030;
  border-color: #feb2b2;
}

/* ===========================
   Collection tag chips (inside header)
   =========================== */
.collection-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.collection-tag-chip {
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 11px;
  background: #bee3f8;
  color: #2b6cb0;
}

/* ===========================
   Add Collection button
   =========================== */
.btn-add-collection {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: var(--font);
  color: var(--sidebar-accent);
  border: 1px dashed var(--sidebar-accent);
  background: transparent;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}

.btn-add-collection:hover {
  background: #ebf4ff;
  color: #2b6cb0;
}

/* ===========================
   Bookmark card extras
   =========================== */
.bookmark-remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  font-size: 10px;
  line-height: 1;
  background: rgba(0, 0, 0, 0.08);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.15s, background 0.12s;
  cursor: pointer;
}

.bookmark-card:hover .bookmark-remove {
  opacity: 1;
}

.bookmark-remove:hover {
  background: #fed7d7;
  color: #c53030;
}

.bookmark-card-empty {
  grid-column: 1 / -1;
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 12.5px;
  border: 1px dashed var(--card-border);
  border-radius: var(--radius-md);
}

/* ===========================
   Inline rename input
   =========================== */
.collection-name-input {
  flex: 1;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--sidebar-accent);
  outline: none;
  font-family: var(--font);
  padding: 0;
  width: 0;
  min-width: 80px;
}

/* ===========================
   Context menu
   =========================== */
.context-menu {
  position: fixed;
  z-index: 9999;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.14);
  min-width: 160px;
  overflow: hidden;
  padding: 4px 0;
}

.context-menu-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 16px;
  font-size: 13px;
  font-family: var(--font);
  color: var(--text-primary);
  background: transparent;
  cursor: pointer;
  transition: background 0.1s;
}

.context-menu-item:hover {
  background: var(--main-bg);
}

/* ===========================
   Sidebar Footer Buttons
   =========================== */
.sidebar-footer-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--sidebar-text);
  font-family: var(--font);
  font-size: 12.5px;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-footer-btn:hover {
  background: var(--sidebar-hover);
  color: #ffffff;
}

.sidebar-footer-icon {
  flex-shrink: 0;
  width: 18px;
  text-align: center;
  font-size: 14px;
  line-height: 1;
}

.sidebar-footer-label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-footer-row {
  display: flex;
  gap: 0;
  margin-top: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 4px;
}

.sidebar-footer-row .sidebar-footer-btn {
  flex: 1;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 2px;
  opacity: 0.6;
  font-size: 10px;
}

.sidebar-footer-row .sidebar-footer-icon {
  font-size: 15px;
}

.sidebar-footer-row .sidebar-footer-btn:hover {
  opacity: 1;
}

/* ===========================
   Import Modal
   =========================== */
.import-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9000;
  animation: import-fade-in 0.15s ease;
}

@keyframes import-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.import-modal-dialog {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  width: 440px;
  max-width: calc(100vw - 32px);
  display: flex;
  flex-direction: column;
  animation: import-slide-up 0.15s ease;
}

@keyframes import-slide-up {
  from { transform: translateY(12px); opacity: 0; }
  to   { transform: translateY(0);   opacity: 1; }
}

.import-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 0;
}

.import-modal-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.import-modal-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-muted);
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  transition: background 0.1s, color 0.1s;
}

.import-modal-close:hover {
  background: var(--collection-header-bg);
  color: var(--text-primary);
}

.import-modal-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.import-modal-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.import-modal-status {
  font-size: 0.875rem;
  color: var(--sidebar-accent);
  min-height: 1.25em;
  font-weight: 500;
}

.import-modal-footer {
  display: flex;
  gap: 8px;
  padding: 0 20px 20px;
  justify-content: flex-end;
}

.import-modal-btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.1s, opacity 0.1s;
}

.import-modal-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.import-modal-btn--primary {
  background: var(--sidebar-accent);
  color: #ffffff;
  border-color: var(--sidebar-accent);
}

.import-modal-btn--primary:hover:not(:disabled) {
  background: #2d8ae8;
  border-color: #2d8ae8;
}

.import-modal-btn--secondary {
  background: var(--collection-header-bg);
  color: var(--text-primary);
  border-color: var(--card-border);
}

.import-modal-btn--secondary:hover:not(:disabled) {
  background: #e2e8f0;
}

/* ── Edit Bookmark Modal ── */
.edit-bookmark-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.edit-bookmark-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.edit-bookmark-input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
}

.edit-bookmark-input:focus {
  border-color: var(--sidebar-accent);
  box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.15);
}

.edit-bookmark-ref {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.edit-bookmark-ref img {
  width: 14px;
  height: 14px;
  border-radius: 2px;
}

/* ── Folder picker (inside import modal) ── */
.import-folder-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--sidebar-accent);
  padding: 0;
  align-self: flex-start;
}

.import-folder-toggle:hover {
  text-decoration: underline;
}

.import-folder-list {
  max-height: 260px;
  overflow-y: auto;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: var(--card-border) transparent;
}

.import-folder-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  cursor: pointer;
  transition: background 0.1s;
  user-select: none;
}

.import-folder-item:hover {
  background: var(--collection-header-bg);
}

.import-folder-item input[type="checkbox"] {
  flex-shrink: 0;
  accent-color: var(--sidebar-accent);
}

.import-folder-item-name {
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.import-folder-item-count {
  flex-shrink: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Restore modal — file input */
.restore-file-input {
  display: block;
  width: 100%;
  margin: 12px 0;
  padding: 8px;
  font-size: 0.9rem;
  border: 1px dashed var(--card-border);
  border-radius: 6px;
  background: var(--collection-header-bg);
  cursor: pointer;
}

/* ===========================
   AI Toolbar
   =========================== */

/* AI toolbar: toggle + Add Collection sit inline in topbar-row */

.ai-toolbar-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 500;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}

.ai-toolbar-toggle:hover {
  color: var(--text-primary);
  background: var(--collection-header-bg);
}

.ai-toolbar-toggle-icon::before {
  content: '\25BC'; /* ▼ */
  font-size: 0.5rem;
}

.ai-toolbar-toggle.collapsed .ai-toolbar-toggle-icon::before {
  content: '\25B6'; /* ▶ */
}

.ai-toolbar.collapsed {
  display: none;
}

.btn-add-collection--compact {
  padding: 4px 10px;
  font-size: 12px;
}

.ai-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 8px;
}

.ai-toolbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--sidebar-accent);
  background: var(--sidebar-accent);
  color: #ffffff;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s;
}

.ai-toolbar-btn:hover:not(:disabled) {
  background: #2d8ae8;
  border-color: #2d8ae8;
}

.ai-toolbar-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.ai-toolbar-btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}

.ai-toolbar-btn--ghost:hover:not(:disabled) {
  background: var(--collection-header-bg);
  border-color: var(--border);
  color: var(--text-primary);
}

/* ===========================
   AI Modals (shared base)
   =========================== */

.ai-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.ai-modal-dialog {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  width: min(480px, 90vw);
  display: flex;
  flex-direction: column;
  max-height: 80vh;
}

.ai-modal-dialog--wide {
  width: min(640px, 94vw);
}

.ai-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.ai-modal-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.ai-modal-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 4px 6px;
  border-radius: var(--radius-sm);
}

.ai-modal-close:hover {
  background: var(--collection-header-bg);
  color: var(--text-primary);
}

.ai-modal-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
  flex: 1;
}

.ai-modal-footer {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
}

/* ===========================
   AI Settings Modal
   =========================== */

.ai-modal-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.ai-modal-select,
.ai-modal-input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.875rem;
  box-sizing: border-box;
}

.ai-modal-select:focus,
.ai-modal-input:focus {
  outline: none;
  border-color: var(--sidebar-accent);
  box-shadow: 0 0 0 2px rgba(58, 142, 235, 0.2);
}

.ai-modal-hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin: 0;
}

.ai-modal-test-status {
  font-size: 0.8125rem;
  min-height: 1.2em;
  transition: color 0.15s;
}

.ai-modal-test-status[data-state='ok']    { color: #22c55e; }
.ai-modal-test-status[data-state='error'] { color: #ef4444; }
.ai-modal-test-status[data-state='pending'] { color: var(--text-secondary); }

/* ===========================
   AI Organize Modal
   =========================== */

.ai-modal-status {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 1.4em;
}

/* Simple CSS spinner */
.ai-modal-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--sidebar-accent);
  border-radius: 50%;
  animation: ai-spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes ai-spin {
  to { transform: rotate(360deg); }
}

.ai-modal-preview {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ai-modal-preview-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
}

.ai-modal-preview-group {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.ai-modal-preview-group-name {
  padding: 8px 12px;
  font-size: 0.875rem;
  font-weight: 600;
  background: var(--collection-header-bg);
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

.ai-modal-preview-list {
  list-style: none;
  margin: 0;
  padding: 4px 0;
}

.ai-modal-preview-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.ai-modal-preview-item:hover {
  background: var(--collection-header-bg);
}

.ai-modal-preview-favicon {
  flex-shrink: 0;
  border-radius: 2px;
}

.ai-modal-preview-item-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

/* ===========================
   Shared AI modal buttons
   =========================== */

.ai-modal-btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.ai-modal-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.ai-modal-btn--primary {
  background: var(--sidebar-accent);
  color: #ffffff;
}

.ai-modal-btn--primary:hover:not(:disabled) {
  background: #2d8ae8;
}

.ai-modal-btn--secondary {
  background: var(--collection-header-bg);
  color: var(--text-primary);
}

.ai-modal-btn--secondary:hover:not(:disabled) {
  background: #e2e8f0;
}

/* ===========================
   Dark Mode — CSS Variables
   =========================== */
body.dark {
  --sidebar-bg: #151d29;
  --sidebar-text: #909eb4;
  --sidebar-hover: #202b39;
  --sidebar-active: #284466;
  --sidebar-accent: #5ca5fd;
  --main-bg: #151d29;
  --card-bg: #4a5568;
  --card-border: #5a6578;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.28);
  --card-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.38);
  --text-primary: #e7edf3;
  --text-secondary: #c3cdd9;
  --text-muted: #8a95a5;
  --collection-header-bg: #4a5568;
  --right-sidebar-bg: #1c2533;
  --right-sidebar-border: #3a4556;
}

body.dark .search-input {
  background: #2a3444;
  color: #e7edf3;
  border-color: #3a4556;
}

body.dark .tag-chip {
  background: #3a4556;
  color: #c3cdd9;
}

body.dark .tag-chip:hover {
  background: #4a5568;
  color: #e7edf3;
}

body.dark .tab-item:hover {
  background: #2a3444;
}

body.dark .tab-item.active-tab {
  background: #2d5a8a;
}

body.dark .context-menu {
  background: #2a3444;
  border-color: #4a5568;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

body.dark .context-menu-item:hover {
  background: #3a4556;
}

body.dark .collection-count {
  background: #5a6578;
  color: #c3cdd9;
}

body.dark .collection-tag-chip {
  background: #284466;
  color: #5ca5fd;
}

body.dark .tabs-window-count {
  background: #3a4556;
  color: #c3cdd9;
}

body.dark .bookmark-card-empty {
  border-color: #5a6578;
  color: #8a95a5;
}

body.dark .btn-add-collection {
  border-color: #5ca5fd;
  color: #5ca5fd;
}

body.dark .btn-add-collection:hover {
  background: #2d5a8a;
  color: #b8dcfe;
}

/* ===========================
   Theme Toggle Button
   =========================== */
.theme-toggle-btn {
  position: relative;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.theme-toggle-btn:hover {
  background: var(--collection-header-bg);
  color: var(--text-primary);
}

/* Theme toggle in sidebar */
.sidebar-left .theme-toggle-btn {
  color: var(--sidebar-text);
  width: 24px;
  height: 24px;
  font-size: 14px;
  opacity: 0.7;
  transition: opacity 0.15s, background 0.15s;
}

.sidebar-left .theme-toggle-btn:hover {
  background: var(--sidebar-hover);
  color: #ffffff;
}

/* Hide theme toggle when sidebar collapsed */
#app.sidebar-collapsed .theme-toggle-btn {
  display: none;
}

/* ===========================
   Top Bar row (search + theme toggle)
   =========================== */
.topbar-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ===========================
   Smooth Collapse Transition
   =========================== */
.collection-body {
  overflow: hidden;
  transition: max-height 0.22s ease, opacity 0.18s ease;
  max-height: 2000px;
  opacity: 1;
}

.collection.collapsed .collection-body {
  display: block; /* override the display:none so transition works */
  max-height: 0;
  opacity: 0;
  pointer-events: none;
}

/* ===========================
   Card Hover Lift
   =========================== */
.bookmark-card {
  transition: background 0.12s, border-color 0.12s, box-shadow 0.15s, transform 0.15s;
}

.bookmark-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

/* ===========================
   Favicon Fallback — Letter Avatar
   =========================== */
.favicon-fallback {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #ffffff;
  flex-shrink: 0;
  text-transform: uppercase;
  line-height: 1;
}

/* ===========================
   Bookmark Card — Inline Title Edit
   =========================== */
.bookmark-title-input {
  font-size: 12.5px;
  font-weight: 500;
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--card-bg);
  border: 1px solid var(--sidebar-accent);
  border-radius: 4px;
  padding: 2px 5px;
  text-align: center;
  width: 100%;
  outline: none;
}

/* ===========================
   Bookmark Card — Inline URL Edit
   =========================== */
.bookmark-url-input {
  font-size: 11px;
  font-weight: 400;
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--card-bg);
  border: 1px solid var(--sidebar-accent);
  border-radius: 4px;
  padding: 2px 5px;
  text-align: left;
  width: 100%;
  outline: none;
}

/* ===========================
   Loading Skeleton
   =========================== */
.skeleton {
  background: linear-gradient(90deg, var(--card-border) 25%, var(--collection-header-bg) 50%, var(--card-border) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.2s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
  from { background-position: 200% center; }
  to   { background-position: -200% center; }
}

.skeleton-collection {
  height: 44px;
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
}

/* ===========================
   Scheduled Backup Modal Form
   =========================== */
.schedule-form-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--text-primary);
}
.schedule-label {
  min-width: 70px;
  font-weight: 500;
  color: var(--text-secondary);
}
.schedule-select,
.schedule-input {
  font-size: 13px;
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 4px;
  padding: 4px 8px;
  outline: none;
}
.schedule-input--small {
  width: 60px;
}
.schedule-folder-wrap {
  display: flex;
  align-items: center;
  gap: 0;
}
.schedule-folder-prefix {
  font-size: 12px;
  color: var(--text-secondary);
  padding-right: 2px;
}
.schedule-suffix {
  font-size: 12px;
  color: var(--text-secondary);
}
.schedule-checkbox {
  margin: 0;
  cursor: pointer;
}
.schedule-mode-details {
  padding-left: 78px; /* align with fields after label */
}
.schedule-hint {
  font-size: 12px;
  color: var(--text-secondary);
  font-style: italic;
}
.schedule-pick-btn {
  padding: 3px 10px;
  font-size: 12px;
}
.schedule-folder-name {
  font-size: 12px;
  color: var(--text-secondary);
  font-style: italic;
}
.schedule-folder-name--set {
  color: var(--text-primary);
  font-style: normal;
  font-weight: 500;
}

/* Active schedule indicator dot */
.sidebar-footer-btn.schedule-active .sidebar-footer-icon::after {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: #4caf50;
  border-radius: 50%;
  margin-left: 2px;
  vertical-align: top;
}