/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background-color: var(--accent-primary);
  color: var(--text-inverse);
}
.btn-primary:hover {
  background-color: var(--accent-primary-hover);
}

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-focus);
}

.btn-danger {
  background-color: var(--accent-danger-subtle);
  color: var(--accent-danger);
  border: 1px solid var(--accent-danger);
}
.btn-danger:hover {
  background-color: var(--accent-danger);
  color: #fff;
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-xs);
}

/* Cards & Surfaces */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.card-elevated {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: var(--font-weight-medium);
}
.badge-success {
  background-color: var(--accent-success-subtle);
  color: var(--accent-success);
}
.badge-warning {
  background-color: var(--accent-warning-subtle);
  color: var(--accent-warning);
}
.badge-danger {
  background-color: var(--accent-danger-subtle);
  color: var(--accent-danger);
}
.badge-info {
  background-color: var(--accent-primary-subtle);
  color: var(--accent-primary);
}

/* Inputs & Form Controls */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}
.input-label {
  font-size: var(--font-xs);
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
}

/* Universal base input & select class (Dark Theme First) */
.input,
.input-field,
.select {
  display: inline-flex;
  align-items: center;
  width: 100%;
  height: var(--input-height-md);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--font-sm);
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  color-scheme: dark;
}

.input::placeholder,
.input-field::placeholder {
  color: var(--text-muted);
}

.input:hover,
.input-field:hover,
.select:hover {
  border-color: var(--input-border-hover);
  background-color: var(--bg-surface-hover);
}

.input:focus,
.input-field:focus,
.select:focus {
  border-color: var(--border-focus);
  background-color: var(--bg-surface-hover);
  box-shadow: 0 0 0 2px var(--input-focus-ring);
}

/* Compact input and select variant */
.input-sm,
.select-sm {
  height: var(--input-height-sm);
  padding: 2px var(--space-2);
  font-size: var(--input-font-sm);
  border-radius: var(--radius-xs);
}

/* Sleek Dark Select Dropdown */
.select,
select.input {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  cursor: pointer;
  padding-right: 28px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 13px;
}

.select-sm,
select.input-sm {
  padding-right: 24px;
  background-position: right 6px center;
  background-size: 11px;
}

/* Dark theme styling for <option> & <optgroup> across Chromium & Firefox */
.select option,
select.input option,
optgroup {
  background-color: #111726; /* var(--bg-surface) */
  color: #f8fafc;            /* var(--text-primary) */
  padding: 8px 12px;
  font-size: var(--font-sm);
}

.select option:checked,
select.input option:checked {
  background-color: #1a2236; /* var(--bg-surface-elevated) */
  color: var(--accent-primary);
  font-weight: var(--font-weight-medium);
}

.select option:hover,
select.input option:hover {
  background-color: var(--bg-surface-hover);
}

/* Tables */
.table-container {
  width: 100%;
  overflow-x: auto;
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-sm);
  text-align: left;
}
.table th {
  padding: var(--space-3);
  border-bottom: 1px solid var(--border-default);
  color: var(--text-muted);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-xs);
  text-transform: uppercase;
}
.table td {
  padding: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}
.table tr:hover td {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
}

/* Stat Grid */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.stat-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.stat-title {
  font-size: var(--font-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.stat-value {
  font-size: var(--font-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}
.stat-desc {
  font-size: var(--font-xs);
  color: var(--text-secondary);
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(9, 13, 22, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-content {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  max-width: 480px;
  width: 90%;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

/* Notes Module 3-Pane Layout */
.notes-container {
  display: flex;
  height: calc(100vh - 110px);
  min-height: 580px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.notes-nav-col {
  width: 240px;
  min-width: 220px;
  border-right: 1px solid var(--border-subtle);
  background-color: var(--bg-surface-elevated);
  display: flex;
  flex-direction: column;
  padding: var(--space-3);
  gap: var(--space-4);
  overflow-y: auto;
  flex-shrink: 0;
}

.notes-list-col {
  width: 330px;
  min-width: 290px;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  background-color: var(--bg-surface);
  overflow: hidden;
  flex-shrink: 0;
}

.notes-editor-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-canvas);
  overflow: hidden;
}

/* Notes Navigation */
.nav-item-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 7px 10px;
  font-size: var(--font-sm);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  background: transparent;
  text-align: left;
  transition: all var(--transition-fast);
  position: relative;
}
.nav-item-btn:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
}
.nav-item-btn.active {
  background-color: var(--accent-primary-subtle);
  color: var(--accent-primary);
  font-weight: var(--font-weight-medium);
}
.nav-item-btn.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background-color: var(--accent-primary);
  border-radius: 0 2px 2px 0;
}

.nav-counter {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface);
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  border: 1px solid var(--border-subtle);
}
.nav-item-btn.active .nav-counter {
  background-color: rgba(56, 189, 248, 0.2);
  color: var(--accent-primary);
  border-color: rgba(56, 189, 248, 0.4);
}

.nav-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-2) var(--space-1) var(--space-1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Notes List */
.notes-list-header {
  padding: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background-color: var(--bg-surface);
}

.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}
.search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
  pointer-events: none;
  display: flex;
  align-items: center;
}
.search-input-field {
  padding-left: 32px !important;
  background-color: var(--bg-surface-elevated) !important;
  border-color: var(--border-subtle) !important;
}
.search-input-field:focus {
  border-color: var(--border-focus) !important;
  background-color: var(--bg-surface-hover) !important;
}

.notes-cards-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.note-card-item {
  padding: var(--space-3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface-elevated);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  transition: all var(--transition-fast);
  position: relative;
}
.note-card-item:hover {
  border-color: var(--border-default);
  background-color: var(--bg-surface-hover);
  transform: translateY(-1px);
}
.note-card-item.active {
  border-color: var(--accent-primary);
  background-color: var(--bg-surface-hover);
  box-shadow: inset 3px 0 0 var(--accent-primary);
}

.note-card-title {
  font-size: var(--font-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  line-height: 1.3;
}

.note-card-snippet {
  font-size: var(--font-xs);
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.45;
  word-break: break-word;
}

.note-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: var(--space-1);
}

/* Notes Editor */
.editor-toolbar {
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  background-color: var(--bg-surface);
  flex-wrap: wrap;
  min-height: 48px;
}

/* Notes WYSIWYG Toolbar */
.uniflow-editor-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 3px;
  padding: 6px 12px;
  background-color: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  user-select: none;
  min-height: 44px;
}

.toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 30px;
  padding: 0 6px;
  border-radius: var(--radius-xs);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toolbar-btn:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.toolbar-btn:active:not(:disabled) {
  transform: scale(0.96);
}

.toolbar-btn.is-active {
  background-color: var(--accent-primary-subtle);
  color: var(--accent-primary);
  border-color: rgba(56, 189, 248, 0.35);
  font-weight: var(--font-weight-semibold);
}

.toolbar-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.toolbar-btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 1px;
}

.toolbar-divider {
  width: 1px;
  height: 18px;
  background-color: var(--border-subtle);
  margin: 0 3px;
  flex-shrink: 0;
}

/* WYSIWYG Content Canvas & ProseMirror */
.editor-wysiwyg-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background-color: var(--bg-canvas);
}

.ProseMirror {
  outline: none;
  min-height: 380px;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6) 120px;
  line-height: 1.75;
  font-size: 16px;
  color: var(--text-primary);
  caret-color: var(--accent-primary);
  word-break: break-word;
}

.ProseMirror ::selection {
  background-color: rgba(56, 189, 248, 0.28);
  color: #ffffff;
}

.ProseMirror h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-top: 1.8rem;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

.ProseMirror h2 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-primary);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.015em;
}

.ProseMirror h3 {
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.4;
  color: #e4e4e7;
  margin-top: 1.25rem;
  margin-bottom: 0.4rem;
}

.ProseMirror p {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.ProseMirror strong {
  font-weight: 600;
  color: var(--text-primary);
}

.ProseMirror em {
  font-style: italic;
}

.ProseMirror u {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.ProseMirror s {
  text-decoration: line-through;
  color: var(--text-muted);
}

.ProseMirror a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.ProseMirror a:hover {
  color: var(--accent-primary-hover);
}

.ProseMirror blockquote {
  margin: 1.25rem 0;
  padding: 0.5rem 1.25rem;
  border-left: 3px solid var(--accent-primary);
  background-color: var(--accent-primary-subtle);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-primary);
  font-style: italic;
}

.ProseMirror code {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--accent-primary);
  white-space: break-spaces;
}

.uniflow-code-block {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin: 1.25rem 0;
  overflow-x: auto;
}

.uniflow-code-block code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.ProseMirror ul,
.ProseMirror ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.ProseMirror li {
  margin-bottom: 0.35rem;
}

.uniflow-task-list {
  list-style: none;
  padding-left: 0;
}

.uniflow-task-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 0.5rem;
}

.uniflow-task-item > label {
  user-select: none;
  margin-top: 3px;
  cursor: pointer;
}

.uniflow-task-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-primary);
  cursor: pointer;
}

.uniflow-task-item[data-checked="true"] > div {
  text-decoration: line-through;
  color: var(--text-muted);
}

.ProseMirror hr {
  border: none;
  height: 1px;
  background-color: var(--border-subtle);
  margin: 2rem 0;
}

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

/* Segmented Control (Edit / Preview) */
.segmented-control {
  display: inline-flex;
  align-items: center;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px;
}
.segmented-btn {
  padding: 3px 10px;
  font-size: 11px;
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}
.segmented-btn:hover {
  color: var(--text-primary);
}
.segmented-btn.active {
  background-color: var(--bg-surface-hover);
  color: var(--accent-primary);
  font-weight: var(--font-weight-semibold);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* Title & Metadata */
.editor-title-wrap {
  padding: var(--space-4) var(--space-6) var(--space-2);
  background-color: var(--bg-canvas);
}

.editor-title-input {
  font-size: 1.625rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  background: transparent;
  border: none;
  outline: none;
  width: 100%;
  padding: var(--space-1) 0;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.editor-title-input::placeholder {
  color: var(--text-muted);
  font-weight: var(--font-weight-normal);
}
.editor-title-input:focus {
  border-bottom: 1px solid var(--accent-primary);
}

.editor-meta-bar {
  padding: var(--space-2) var(--space-6);
  background-color: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-xs);
  flex-wrap: wrap;
}

.folder-select-wrap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  font-size: 11px;
  color: var(--accent-primary);
  font-weight: var(--font-weight-medium);
  transition: border-color var(--transition-fast);
}
.tag-pill:hover {
  border-color: var(--accent-primary);
}
.tag-pill .remove-tag-btn {
  cursor: pointer;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  font-size: 10px;
  transition: all var(--transition-fast);
}
.tag-pill .remove-tag-btn:hover {
  background-color: var(--accent-danger-subtle);
  color: var(--accent-danger);
}

.tag-input-field {
  height: 28px !important;
  width: 110px !important;
  padding: 2px 8px !important;
  font-size: 11px !important;
  border-radius: var(--radius-full) !important;
}

.editor-content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: var(--bg-canvas);
}

.editor-textarea {
  flex: 1;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  background: transparent;
  color: var(--text-primary);
  border: none;
  outline: none;
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1.68;
  resize: none;
}

.markdown-preview-pane {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  overflow-y: auto;
  color: var(--text-primary);
}

/* Markdown Rendering Styles */
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  color: var(--text-primary);
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
}
.markdown-body h1 { font-size: var(--font-2xl); border-bottom: 1px solid var(--border-subtle); padding-bottom: var(--space-2); }
.markdown-body h2 { font-size: var(--font-xl); }
.markdown-body h3 { font-size: var(--font-lg); }
.markdown-body p { margin-bottom: var(--space-3); line-height: 1.65; color: var(--text-secondary); }
.markdown-body code {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: var(--font-xs);
  color: var(--accent-primary);
}
.markdown-body pre {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-default);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin-bottom: var(--space-3);
}
.markdown-body pre code { background: transparent; border: none; padding: 0; }
.markdown-body blockquote {
  border-left: 3px solid var(--accent-primary);
  padding-left: var(--space-3);
  margin: var(--space-3) 0;
  color: var(--text-muted);
  font-style: italic;
}
.markdown-body ul, .markdown-body ol {
  padding-left: var(--space-5);
  margin-bottom: var(--space-3);
  color: var(--text-secondary);
}
.markdown-body li { margin-bottom: var(--space-1); }
.markdown-body li.task-item {
  list-style: none;
  margin-left: -var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: var(--space-4) 0;
}
.markdown-body a {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* Status Indicators */
.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: var(--font-weight-medium);
}
.status-indicator-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}
.status-saved .status-indicator-dot { background-color: var(--accent-success); }
.status-saving .status-indicator-dot { background-color: var(--accent-primary); animation: pulse 1s infinite; }
.status-unsaved .status-indicator-dot { background-color: var(--accent-warning); }
.status-error .status-indicator-dot { background-color: var(--accent-danger); }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* ==========================================================================
   UI Utility Classes
   ========================================================================== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1; }
.shrink-0 { flex-shrink: 0; }
.w-full { width: 100%; }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.px-2 { padding-left: var(--space-2); padding-right: var(--space-2); }
.px-3 { padding-left: var(--space-3); padding-right: var(--space-3); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.py-1 { padding-top: var(--space-1); padding-bottom: var(--space-1); }
.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.pt-2 { padding-top: var(--space-2); }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }

.text-xs { font-size: var(--font-xs); }
.text-sm { font-size: var(--font-sm); }
.text-base { font-size: var(--font-base); }
.text-lg { font-size: var(--font-lg); }
.text-xl { font-size: var(--font-xl); }
.text-2xl { font-size: var(--font-2xl); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent-primary { color: var(--accent-primary); }
.text-accent-warning { color: var(--accent-warning); }
.text-accent-danger { color: var(--accent-danger); }

.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge-neutral {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.nav-kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 1px 4px;
  border-radius: var(--radius-xs);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-muted);
}

/* ==========================================================================
   Mobile Navigation & Drawer Overlay Rules (<= 860px)
   ========================================================================== */

@media (max-width: 860px) {
  html, body {
    overflow-x: hidden;
  }

  .notes-container {
    flex-direction: row;
    height: 100%;
    min-height: calc(100vh - var(--header-height) - 16px);
    border: none;
    border-radius: 0;
    position: relative;
    overflow: hidden;
  }

  /* Notes Navigation Drawer */
  .notes-nav-col.notes-nav-drawer {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(320px, 85vw);
    height: 100dvh;
    z-index: 950;
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-default);
    box-shadow: 12px 0 28px rgba(0, 0, 0, 0.6);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    will-change: transform;
    overflow-y: auto;
    padding-bottom: calc(var(--space-6) + env(safe-area-inset-bottom, 0px));
  }

  .notes-nav-col.notes-nav-drawer-open {
    transform: translateX(0);
  }

  /* Notes Drawer Backdrop */
  .notes-nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(9, 13, 22, 0.75);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 940;
    opacity: 0;
    transition: opacity var(--transition-normal);
  }

  .notes-nav-backdrop.visible {
    display: block;
    opacity: 1;
  }

  .notes-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: var(--space-2);
  }

  /* Touch Target Ergonomics: min 44px */
  .nav-item-btn {
    min-height: 44px;
    padding: var(--space-3);
  }

  .note-card-item {
    min-height: 72px;
    padding: var(--space-3);
  }

  .btn {
    min-height: 44px;
  }

  .btn-sm {
    min-height: 38px;
  }

  .notes-mobile-list-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
  }

  .editor-toolbar {
    padding: var(--space-2) var(--space-3);
    gap: var(--space-2);
  }

  .editor-title-wrap {
    padding: var(--space-3) var(--space-4) var(--space-1);
  }

  .editor-title-input {
    font-size: var(--font-xl);
    min-height: 44px;
  }

  .editor-meta-bar {
    padding: var(--space-2) var(--space-4);
  }

  .editor-textarea {
    font-size: 16px; /* Prevents auto-zoom on iOS Safari */
    padding: var(--space-3) var(--space-4);
  }
}

/* AppShell Mobile Drawer Animation */
@media (max-width: 768px) {
  .sidebar-container {
    transition: transform var(--transition-normal), visibility var(--transition-normal) !important;
    transform: translateX(-100%) !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    bottom: 0 !important;
    width: min(300px, 85vw) !important;
    height: 100dvh !important;
    z-index: 1000 !important;
    visibility: hidden;
    pointer-events: none;
  }

  .sidebar-container.drawer-open {
    transform: translateX(0) !important;
    box-shadow: 12px 0 32px rgba(0, 0, 0, 0.75) !important;
    visibility: visible !important;
    pointer-events: auto !important;
  }

  .app-drawer-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(9, 13, 22, 0.75);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
  }

  .app-drawer-backdrop.is-active {
    display: block !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  .nav-item {
    min-height: 44px;
    touch-action: manipulation;
  }

  /* Tasks view on mobile */
  .tasks-nav-drawer {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    bottom: 0 !important;
    width: min(300px, 85vw) !important;
    height: 100dvh !important;
    z-index: 950 !important;
    background-color: var(--bg-surface) !important;
    box-shadow: 12px 0 28px rgba(0, 0, 0, 0.6) !important;
    transform: translateX(-100%) !important;
    transition: transform var(--transition-normal), visibility var(--transition-normal);
    visibility: hidden;
    pointer-events: none;
  }

  .tasks-nav-drawer.drawer-open {
    transform: translateX(0) !important;
    visibility: visible !important;
    pointer-events: auto !important;
  }

  .tasks-nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(9, 13, 22, 0.75);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 940;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
  }

  .tasks-nav-backdrop.is-active {
    display: block !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  .mobile-only {
    display: inline-flex !important;
  }

  .desktop-only {
    display: none !important;
  }

  .kanban-board {
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: var(--space-3);
  }

  .kanban-column {
    min-width: calc(100vw - 48px) !important;
    max-width: calc(100vw - 48px) !important;
    scroll-snap-align: center;
  }

  .calendar-week-grid {
    min-width: 680px;
  }

  .calendar-allday-row {
    min-width: 680px;
  }
}

/* ==========================================================================
   PLANNING SYSTEM STYLES (Tasks, Calendar, My Day, Reminders)
   ========================================================================== */

/* Priority Badges */
.priority-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: var(--font-weight-bold);
  line-height: 1;
}

.priority-p1 {
  background-color: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.priority-p2 {
  background-color: rgba(249, 115, 22, 0.15);
  color: #f97316;
  border: 1px solid rgba(249, 115, 22, 0.3);
}

.priority-p3 {
  background-color: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.priority-p4 {
  background-color: rgba(148, 163, 184, 0.15);
  color: #94a3b8;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

/* Task Cards & Interactions */
.task-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.task-card:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-default);
}

.task-card.is-completed {
  opacity: 0.6;
}

.task-card.is-completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-card.is-dragging {
  opacity: 0.4;
  border: 2px dashed var(--accent-primary);
}

.task-checkbox {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 2px solid var(--border-default);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.task-checkbox:hover {
  border-color: var(--accent-primary);
}

.task-checkbox.checked {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #000;
}

.task-drag-handle {
  cursor: grab;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  padding: 0 4px;
}

.task-drag-handle:active {
  cursor: grabbing;
}

/* Subtask Items */
.subtask-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-xs);
}

.subtask-item:hover {
  background-color: var(--bg-surface-hover);
}

/* Calendar Element Styling with Distinct Colors */
.calendar-legend-bar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  font-size: var(--font-xs);
}

.calendar-event-item {
  background-color: rgba(56, 189, 248, 0.15) !important;
  border-left: 3px solid #38bdf8 !important;
  color: var(--text-primary);
}

.calendar-work-block-item {
  background-color: rgba(168, 85, 247, 0.18) !important;
  border-left: 3px solid #a855f7 !important;
  color: var(--text-primary);
}

.calendar-deadline-item {
  background-color: rgba(239, 68, 68, 0.15) !important;
  border-left: 3px solid #ef4444 !important;
  color: var(--text-primary);
}

.calendar-allday-item {
  background-color: rgba(234, 179, 8, 0.15) !important;
  border-left: 3px solid #eab308 !important;
  color: var(--text-primary);
}

.calendar-conflict-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background-color: rgba(245, 158, 11, 0.2);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.4);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 11px;
}

/* Hourly Calendar Grid */
.calendar-week-grid {
  display: grid;
  grid-template-columns: 60px repeat(7, 1fr);
  height: calc(100vh - 180px);
  overflow-y: auto;
  border-top: 1px solid var(--border-subtle);
}

.calendar-hour-cell {
  height: 50px;
  border-bottom: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  position: relative;
}

.calendar-hour-label {
  font-size: 11px;
  color: var(--text-muted);
  text-align: right;
  padding-right: 8px;
  transform: translateY(-8px);
}

/* Calendar All-Day Row & Today Styling */
.calendar-allday-row {
  display: grid;
  grid-template-columns: 60px repeat(7, 1fr);
  border-bottom: 2px solid var(--border-default);
  background-color: var(--bg-surface-elevated);
  min-height: 38px;
}

.calendar-allday-label {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 8px;
  font-size: 11px;
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  border-right: 1px solid var(--border-subtle);
}

.calendar-allday-cell {
  padding: 4px;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 36px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.calendar-allday-cell:hover {
  background-color: var(--bg-surface-hover);
}

.calendar-header-cell.is-today {
  background-color: rgba(56, 189, 248, 0.12) !important;
  color: var(--accent-primary) !important;
  border-bottom: 2px solid var(--accent-primary) !important;
}

.calendar-hour-cell.is-today,
.calendar-allday-cell.is-today {
  background-color: rgba(56, 189, 248, 0.04);
}

.calendar-current-time-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #ef4444;
  z-index: 5;
  pointer-events: none;
}

.calendar-current-time-line::before {
  content: '';
  position: absolute;
  left: -4px;
  top: -3px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #ef4444;
}

/* Kanban Board Styling */
.kanban-board {
  display: flex;
  gap: var(--space-4);
  flex: 1;
  overflow-x: auto;
  padding-bottom: var(--space-4);
  min-height: 0;
}

.kanban-column {
  flex: 1;
  min-width: 290px;
  max-width: 380px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.kanban-column.is-dragover {
  border-color: var(--accent-primary) !important;
  background-color: rgba(56, 189, 248, 0.05) !important;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.25);
}

.kanban-column-header {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-sm);
  background-color: var(--bg-surface-elevated);
}

.kanban-cards-container {
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
  overflow-y: auto;
  min-height: 140px;
}

/* ==========================================================================
   GLOBAL SEARCH & COMMAND PALETTE STYLES
   ========================================================================== */

mark.search-highlight {
  background-color: rgba(6, 182, 212, 0.25) !important;
  color: #38bdf8 !important;
  font-weight: var(--font-weight-semibold);
  border-radius: 2px;
  padding: 0 2px;
}

.search-result-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.search-result-card:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

.command-palette-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 10vh var(--space-4) var(--space-4);
}

.command-palette-card {
  width: min(640px, 94vw);
  max-height: 75vh;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.palette-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.palette-item.is-selected,
.palette-item:hover {
  background-color: var(--bg-surface-elevated);
  border-left: 3px solid var(--accent-primary);
}