/* Learning vault — uses design tokens from base_style.css */

main:has(> .learning-layout) {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 0;
}

.learning-layout {
  display: flex;
  flex: 1;
  width: 100%;
  min-height: calc(100vh - 72px - 80px);
  align-items: stretch;
}

/* Sidebar — flush left, full height panel */
.learning-sidebar {
  flex: 0 0 260px;
  width: 260px;
  background: var(--color-overlay);
  border-right: 1px solid var(--color-border-strong);
  overflow-x: hidden;
  overflow-y: auto;
  transition:
    width 0.2s ease,
    flex-basis 0.2s ease,
    opacity 0.2s ease,
    border-color 0.2s ease;
}

.learning-layout.sidebar-collapsed .learning-sidebar {
  flex-basis: 0;
  width: 0;
  opacity: 0;
  border-right-color: transparent;
  pointer-events: none;
}

.learning-sidebar-header {
  padding: 0.75rem 0.75rem 0.25rem;
  border-bottom: 1px solid var(--color-border);
}

.learning-sidebar-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
}

.learning-sidebar-title:hover {
  color: var(--color-accent);
  background: var(--color-hover-bg);
}

.learning-sidebar-title.active {
  background: var(--color-hover-bg-strong);
  color: var(--color-accent);
}

.learning-tree {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.5rem 0.5rem 1rem;
}

.learning-tree-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--color-text);
  text-decoration: none;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.learning-tree-item .bi {
  flex-shrink: 0;
  opacity: 0.85;
}

.learning-tree-node {
  display: grid;
  grid-template-columns: 1.25rem minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-items: center;
  gap: 0 0.25rem;
}

.learning-tree-toggle,
.learning-tree-toggle-spacer {
  grid-column: 1;
  grid-row: 1;
  width: 1.25rem;
  height: 1.25rem;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.learning-tree-toggle .bi {
  transition: transform 0.15s ease;
  font-size: 0.75rem;
}

.learning-tree-toggle.expanded .bi {
  transform: rotate(90deg);
}

.learning-tree-node > .learning-tree-item {
  grid-column: 2;
  grid-row: 1;
}

.learning-tree-children {
  grid-column: 1 / -1;
  display: none;
  padding-left: 0.85rem;
}

.learning-tree-children.expanded {
  display: block;
}

.learning-tree-empty {
  color: var(--color-muted);
  font-size: 0.85rem;
  padding: 0.5rem;
}

.learning-sidebar-tags {
  padding: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.learning-sidebar-tags-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  margin-bottom: 0.5rem;
}

.learning-tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.learning-tag-chip {
  font-size: 0.78rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  text-decoration: none;
}

.learning-tag-chip.active,
.learning-tag-chip:hover {
  background: var(--color-hover-bg-strong);
  color: var(--color-accent);
}

.learning-tree-item:hover,
.learning-tree-item.active {
  background: var(--color-hover-bg-strong);
  color: var(--color-accent);
}

/* Main content area */
.learning-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.learning-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 1.25rem;
  border-bottom: 1px solid var(--color-border-strong);
  background: var(--color-overlay);
  flex-wrap: wrap;
}

.learning-toolbar-start,
.learning-toolbar-end,
.learning-toolbar-center {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.learning-toolbar-end {
  flex-shrink: 0;
  margin-left: auto;
}

.learning-main-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1.25rem;
  border-bottom: 1px solid var(--color-border-strong);
  background: var(--color-overlay);
  flex-wrap: wrap;
}

.learning-sidebar-toggle {
  color: var(--color-text);
  padding: 0.25rem 0.45rem;
  font-size: 1.25rem;
  line-height: 1;
  text-decoration: none;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
}

.learning-sidebar-toggle:hover,
.learning-sidebar-toggle:focus {
  color: var(--color-accent);
  background: var(--color-hover-bg);
}

.learning-breadcrumb {
  flex: 1;
  min-width: 0;
}

.learning-breadcrumb .breadcrumb {
  background: transparent;
  margin-bottom: 0;
  padding: 0;
}

.learning-breadcrumb .breadcrumb-item,
.learning-breadcrumb .breadcrumb-item a {
  color: var(--color-text);
  font-size: 0.95rem;
}

.learning-breadcrumb .breadcrumb-item.active {
  color: var(--color-accent);
}

.learning-view-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.learning-view-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s;
}

.learning-view-btn + .learning-view-btn {
  border-left: 1px solid var(--color-border-strong);
}

.learning-view-btn:hover {
  color: var(--color-text);
  background: var(--color-hover-bg);
}

.learning-view-btn.active {
  color: var(--color-accent);
  background: var(--color-brand-subtle);
}

.learning-add-dropdown {
  flex-shrink: 0;
}

.learning-add-btn {
  font-weight: 500;
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-size: 0.9rem;
  box-shadow: 0 1px 3px var(--color-shadow);
}

.learning-add-btn .bi-plus-lg {
  margin-right: 0.25rem;
}

.learning-dropdown-hint {
  color: var(--color-muted);
  font-size: 0.875rem;
}

.learning-search-form {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--color-overlay-strong);
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  min-width: 180px;
  max-width: 320px;
  flex: 1;
}

.learning-search-input {
  border: none;
  background: transparent;
  color: var(--color-text);
  width: 100%;
  outline: none;
  font-size: 0.9rem;
}

.learning-search-input::placeholder {
  color: var(--color-muted);
}

.learning-filter-tabs {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.learning-filter-select {
  min-width: 7.5rem;
  max-width: 9rem;
  background: var(--color-overlay-strong);
  border-color: var(--color-border);
  color: var(--color-text);
}

.learning-sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1035;
  border: none;
  padding: 0;
  margin: 0;
  background: var(--color-overlay-strong);
  cursor: pointer;
}

.learning-sidebar-backdrop[hidden] {
  display: none !important;
}

.learning-filter-tab {
  padding: 0.35rem 0.65rem;
  font-size: 0.82rem;
  color: var(--color-inverse-subtle);
  text-decoration: none;
  border-right: 1px solid var(--color-border-strong);
}

.learning-filter-tab:last-child {
  border-right: none;
}

.learning-filter-tab.active,
.learning-filter-tab:hover {
  background: var(--color-hover-bg-strong);
  color: var(--color-accent);
}

.learning-section {
  margin-bottom: 1.5rem;
}

.learning-section-title {
  font-size: 1rem;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.learning-section-files[data-view="grid"] {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(108px, 1fr));
  gap: 0.65rem;
}

.learning-file-thumb {
  width: 48px;
  height: 64px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 4px var(--color-shadow);
}

.learning-star-btn {
  border: none;
  background: transparent;
  color: var(--color-muted);
  padding: 0;
  line-height: 1;
}

.learning-star-btn.starred,
.learning-star-btn:hover {
  color: var(--color-accent);
}

.learning-sort-link {
  color: inherit;
  text-decoration: none;
}

.learning-sort-link.active {
  color: var(--color-accent);
}

.learning-drop-overlay {
  position: absolute;
  inset: 0;
  background: var(--color-brand-subtle);
  border: 2px dashed var(--color-dropzone-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  pointer-events: none;
}

.learning-content.drag-over {
  outline: 2px dashed var(--color-dropzone-border);
}

.learning-drop-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-accent);
  font-size: 1.1rem;
}

.learning-upload-progress {
  margin-bottom: 1rem;
}

.learning-upload-tray {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 1070;
  width: min(22rem, calc(100vw - 2rem));
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px var(--color-shadow);
  overflow: hidden;
}

.learning-upload-tray-header {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.55rem 0.45rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.learning-upload-tray-toggle {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  border: 0;
  background: transparent;
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  padding: 0;
}

.learning-upload-tray-chevron {
  margin-left: auto;
  transition: transform 0.15s ease;
}

.learning-upload-tray-toggle.is-collapsed .learning-upload-tray-chevron {
  transform: rotate(-90deg);
}

.learning-upload-tray-close {
  flex-shrink: 0;
  opacity: 0.7;
}

.learning-upload-queue {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 16rem;
  overflow-y: auto;
}

.learning-upload-item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 0.35rem 0.5rem;
  align-items: center;
  padding: 0.55rem 0.75rem;
  font-size: 0.82rem;
  border-bottom: 1px solid var(--color-border);
}

.learning-upload-item-progress {
  position: absolute;
  inset: 0 auto 0 0;
  width: 100%;
  pointer-events: none;
  opacity: 0.12;
}

.learning-upload-item-bar {
  height: 100%;
  background: var(--color-accent);
  transition: width 0.15s ease;
}

.learning-upload-item-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text);
}

.learning-upload-item-status {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

.learning-upload-item-icon {
  display: flex;
  align-items: center;
  color: var(--color-text-muted);
}

.learning-upload-item-complete .learning-upload-item-icon,
.learning-upload-item-complete .learning-upload-item-status {
  color: #2ecc71;
}

.learning-upload-item-duplicate .learning-upload-item-icon {
  color: #f39c12;
}

.learning-upload-item-error .learning-upload-item-icon,
.learning-upload-item-error .learning-upload-item-status {
  color: #e74c3c;
}

.learning-upload-item-retry {
  padding: 0.1rem 0.45rem;
  font-size: 0.72rem;
}

.learning-upload-spinner {
  display: inline-block;
  width: 0.85rem;
  height: 0.85rem;
  border: 2px solid var(--color-accent);
  border-right-color: transparent;
  border-radius: 50%;
  animation: learning-upload-spin 0.7s linear infinite;
}

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

.learning-search-results {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.learning-search-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  background: var(--color-overlay-strong);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  text-decoration: none;
}

.learning-search-item:hover {
  background: var(--color-hover-bg);
  color: var(--color-accent);
}

.learning-search-meta {
  display: block;
  font-size: 0.82rem;
  color: var(--color-muted);
}

.learning-shortcuts dt {
  float: left;
  clear: left;
  width: 5rem;
  font-family: monospace;
  color: var(--color-accent);
}

.learning-shortcuts dd {
  margin-left: 5.5rem;
  margin-bottom: 0.5rem;
}

.learning-content {
  position: relative;
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.25rem 1.5rem;
}

.learning-modal {
  background: var(--color-surface-raised);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}

.learning-modal .modal-header,
.learning-modal .modal-footer {
  border-color: var(--color-border-strong);
}

.learning-alert {
  background: var(--color-overlay-strong);
  border: none;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.learning-empty {
  color: var(--color-inverse-subtle);
  padding: 2rem 0;
  text-align: center;
}

/* File browser — grid and list views */
.learning-files {
  width: 100%;
}

.learning-files[data-view="grid"] {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(108px, 1fr));
  gap: 0.65rem;
  max-width: 100%;
}

.learning-files[data-view="grid"] .learning-list-header {
  display: none;
}

.learning-files[data-view="grid"] .learning-file-item,
.learning-section-files[data-view="grid"] .learning-file-item,
.learning-files[data-view="grid"] .learning-file-row .learning-file-item,
.learning-section-files[data-view="grid"]
  .learning-file-row
  .learning-file-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  padding: 0.85rem 0.5rem;
  background: var(--color-overlay-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  text-decoration: none;
  text-align: center;
  transition:
    background 0.15s,
    border-color 0.15s,
    color 0.15s;
  min-height: 108px;
}

.learning-files[data-view="grid"] .learning-file-row,
.learning-section-files[data-view="grid"] .learning-file-row {
  position: relative;
}

.learning-files[data-view="grid"] .learning-file-row .learning-star-btn,
.learning-section-files[data-view="grid"]
  .learning-file-row
  .learning-star-btn {
  position: absolute;
  top: 0.35rem;
  right: 0.35rem;
  z-index: 1;
}

.learning-files[data-view="grid"] .learning-file-item:hover,
.learning-section-files[data-view="grid"] .learning-file-item:hover,
.learning-files[data-view="grid"] .learning-file-row .learning-file-item:hover,
.learning-section-files[data-view="grid"]
  .learning-file-row
  .learning-file-item:hover {
  background: var(--color-overlay-strong);
  border-color: var(--color-border-strong);
  color: var(--color-accent);
}

.learning-files[data-view="grid"] .learning-file-icon {
  font-size: 1.75rem;
  line-height: 1;
}

.learning-files[data-view="grid"] .learning-file-icon .bi-folder2,
.learning-files[data-view="grid"] .learning-file-icon .bi-folder2-open {
  color: var(--color-accent);
}

.learning-files[data-view="grid"] .learning-file-name-wrap {
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
}

.learning-files[data-view="grid"] .learning-file-name {
  font-size: 0.82rem;
  line-height: 1.25;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.learning-files[data-view="grid"] .learning-file-type,
.learning-files[data-view="grid"] .learning-file-date,
.learning-files[data-view="grid"] .learning-file-size {
  display: none;
}

.learning-files[data-view="list"] {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-overlay);
}

.learning-list-header,
.learning-files[data-view="list"] .learning-file-item,
.learning-files[data-view="list"] .learning-file-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 110px 130px 90px;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 1rem;
}

.learning-files[data-view="list"] .learning-file-row {
  grid-template-columns: minmax(0, 1fr) 110px 130px 90px 2rem;
  border-bottom: 1px solid var(--color-border);
}

.learning-files[data-view="list"] .learning-file-row:last-child {
  border-bottom: none;
}

.learning-files[data-view="list"] .learning-file-row .learning-file-item {
  display: contents;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.12s;
}

.learning-files[data-view="list"] .learning-file-row:hover .learning-file-item,
.learning-files[data-view="list"] .learning-file-row:hover {
  background: var(--color-hover-bg);
  color: var(--color-accent);
}

.learning-files[data-view="list"] .learning-file-row .learning-star-btn {
  justify-self: center;
}

.learning-list-header {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-border-strong);
  background: var(--color-overlay);
}

.learning-list-header .learning-file-icon {
  display: none;
}

.learning-files[data-view="list"] .learning-file-item {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: background 0.12s;
}

.learning-files[data-view="list"] .learning-file-item:last-child {
  border-bottom: none;
}

.learning-files[data-view="list"] .learning-file-item:hover {
  background: var(--color-hover-bg);
  color: var(--color-accent);
}

.learning-files[data-view="list"] .learning-file-name-wrap {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.learning-files[data-view="list"] .learning-file-icon {
  flex-shrink: 0;
  font-size: 1.2rem;
  width: 1.5rem;
  text-align: center;
}

.learning-files[data-view="list"] .learning-file-icon .bi-folder2,
.learning-files[data-view="list"] .learning-file-icon .bi-folder2-open {
  color: var(--color-accent);
}

.learning-files[data-view="list"] .learning-file-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.9rem;
}

.learning-files[data-view="list"] .learning-file-type,
.learning-files[data-view="list"] .learning-file-date,
.learning-files[data-view="list"] .learning-file-size {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.learning-files[data-view="list"] .learning-file-item:hover .learning-file-type,
.learning-files[data-view="list"] .learning-file-item:hover .learning-file-date,
.learning-files[data-view="list"]
  .learning-file-item:hover
  .learning-file-size {
  color: var(--color-text);
}

/* Auth pages */
.learning-form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1rem;
  border-radius: var(--radius-md);
}

.learning-form-card .form-label {
  color: var(--color-text);
}

.learning-hint {
  color: var(--color-text-muted);
}

.learning-auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
  padding: 2rem 1rem;
}

.learning-auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 2rem;
  border-radius: var(--radius-md);
}

.learning-auth-card h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

/* Document viewer */
.learning-doc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 1rem;
  padding: 0 0.25rem;
}

.learning-doc-header h1 {
  font-size: 1.35rem;
  margin: 0;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learning-doc-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.learning-pdf-layout .learning-content {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.learning-pdf-container {
  display: flex;
  gap: 0.75rem;
  flex: 1;
  min-height: 0;
}

.learning-pdf-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.learning-pdf-toolbar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem;
  background: var(--color-overlay);
  border-radius: var(--radius-md) 8px 0 0;
  flex-wrap: wrap;
}

.learning-pdf-toolbar button {
  border: 1px solid var(--color-border-strong);
  background: var(--color-hover-bg);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.45rem;
  font-size: 0.85rem;
}

.learning-pdf-page-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.learning-pdf-page-controls input {
  width: 3rem;
  text-align: center;
  background: var(--color-overlay-strong);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  border-radius: var(--radius-sm);
}

.learning-pdf-toolbar-divider {
  width: 1px;
  height: 1.25rem;
  background: var(--color-border-strong);
  margin: 0 0.25rem;
}

.learning-pdf-viewer {
  background: var(--color-bg);
  border-radius: 0 0 8px 8px;
  padding: 1rem;
  overflow: auto;
  flex: 1;
  min-height: 420px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.learning-pdf-page-wrap {
  display: flex;
  justify-content: center;
}

.learning-split-view .learning-pdf-container {
  flex-wrap: wrap;
}

.learning-split-note {
  flex: 0 0 320px;
  background: var(--color-overlay);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  max-height: calc(100vh - 220px);
  display: flex;
  flex-direction: column;
}

.learning-split-note iframe {
  flex: 1;
  border: none;
  background: var(--color-text);
  border-radius: var(--radius-sm);
  min-height: 300px;
}

.learning-frontmatter,
.learning-doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.learning-frontmatter-item {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.learning-backlinks {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.learning-backlinks h2 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.learning-backlinks ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.learning-backlinks a {
  color: var(--color-accent);
}

.learning-editor {
  width: 100%;
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
  background: var(--color-overlay-strong);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 1rem;
  min-height: 420px;
}

.learning-edit-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
}

.learning-edit-hint {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin: 0;
}

.learning-autocomplete {
  position: absolute;
  list-style: none;
  margin: 0;
  padding: 0.25rem 0;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  max-height: 200px;
  overflow-y: auto;
  z-index: 10;
}

.learning-autocomplete li {
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  color: var(--color-text);
}

.learning-autocomplete li:hover {
  background: var(--color-hover-bg);
  color: var(--color-accent);
}

.learning-edit-form {
  position: relative;
}

.learning-pdf-page {
  display: block;
  margin: 0 auto 1rem;
  max-width: 100%;
  background: #fff;
  box-shadow: 0 2px 8px var(--color-shadow);
}

.learning-markdown {
  background: var(--color-overlay);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  color: var(--color-text);
  line-height: 1.6;
}

.learning-markdown h1,
.learning-markdown h2,
.learning-markdown h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.learning-markdown a,
.learning-markdown .wikilink {
  color: var(--color-accent);
}

.learning-markdown .wikilink-missing {
  color: var(--color-muted);
  font-style: italic;
}

.learning-markdown pre {
  background: var(--color-shadow);
  padding: 1rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.learning-markdown code {
  background: var(--color-overlay-strong);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
}

.learning-markdown table {
  width: 100%;
  margin: 1rem 0;
}

.learning-markdown th,
.learning-markdown td {
  border: 1px solid var(--color-border-strong);
  padding: 0.5rem;
}

@media (max-width: 768px) {
  .learning-layout {
    flex-direction: row;
    min-height: auto;
    position: relative;
  }

  .learning-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1040;
    width: min(280px, 85vw);
    max-height: none;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    border-right: 1px solid var(--color-border-strong);
    border-bottom: none;
  }

  .learning-layout.sidebar-open .learning-sidebar {
    transform: translateX(0);
  }

  .learning-layout.sidebar-collapsed .learning-sidebar {
    transform: translateX(-100%);
    opacity: 1;
    pointer-events: none;
  }

  .learning-toolbar,
  .learning-main-header {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .learning-toolbar-center {
    order: 3;
    width: 100%;
  }

  .learning-search-form {
    max-width: none;
  }

  .learning-content {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .learning-list-header,
  .learning-files[data-view="list"] .learning-file-item,
  .learning-files[data-view="list"] .learning-file-row {
    grid-template-columns: minmax(0, 1fr) 80px;
  }

  .learning-files[data-view="list"] .learning-file-row {
    grid-template-columns: minmax(0, 1fr) 80px 2rem;
  }

  .learning-list-header .learning-file-date,
  .learning-list-header .learning-file-size,
  .learning-files[data-view="list"] .learning-file-date,
  .learning-files[data-view="list"] .learning-file-size {
    display: none;
  }

  .learning-filter-tabs {
    display: none;
  }
}