/* Admin — uses styles.css variables */

/* Outer `#admin-root.app-shell` provides horizontal padding; inner `.card.admin-inner` is the white content panel. */
.admin-inner {
  width: 100%;
  box-sizing: border-box;
}

/* Spacing: adjacent admin buttons vs toolbar field columns (inherited by all admin content). */
#admin-root {
  --admin-btn-gap: 0.5rem;
  --admin-toolbar-gap-row: 0.5rem;
  --admin-toolbar-gap-col: 0.75rem;
}

/** Inline row of buttons only (no stacked labels); use instead of `.admin-toolbar` for icon/text action strips. */
.admin-btn-group {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--admin-btn-gap);
}

.admin-banner a {
  color: inherit;
  font-weight: 600;
  text-decoration: underline;
}

.admin-banner {
  background: var(--banner-admin-warn-bg);
  border: 1px solid var(--banner-admin-warn-border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--banner-admin-warn-fg);
}

.admin-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--admin-toolbar-gap-row) var(--admin-toolbar-gap-col);
  margin-bottom: 1.25rem;
}

.admin-q-nav {
  display: grid;
  grid-template-columns: minmax(2.75rem, auto) 1fr minmax(2.75rem, auto);
  gap: var(--admin-btn-gap) var(--admin-toolbar-gap-col);
  align-items: center;
  margin: 0 0 1.1rem;
}

.admin-q-nav__title {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  color: var(--text);
}

.admin-q-nav__btn {
  min-width: 2.75rem;
  padding: 0.5rem 0.65rem;
  font-size: 1.05rem;
  line-height: 1;
}

.admin-q-nav__btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.admin-toolbar__field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: min(100%, 14rem);
}

.admin-toolbar__field--grow {
  flex: 1 1 18rem;
}

.admin-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.admin-select,
.admin-input,
.admin-textarea {
  font: inherit;
  font-size: 0.9375rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  background: var(--surface);
  color: var(--text);
  width: 100%;
  box-sizing: border-box;
}

.admin-textarea {
  min-height: 5rem;
  resize: vertical;
}

.admin-textarea--sm {
  min-height: 3rem;
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--admin-btn-gap);
  margin-bottom: 1.25rem;
}

.admin-btn {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
}

.admin-btn--icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.45rem;
  min-width: 2.25rem;
  min-height: 2.25rem;
  line-height: 0;
}

.admin-btn--icon svg {
  display: block;
  flex-shrink: 0;
}

.admin-btn:hover {
  background: var(--bg);
}

.admin-btn--primary {
  background: var(--accent-fill);
  border-color: var(--accent-fill);
  color: var(--color-text-on-primary);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.admin-btn--primary:hover {
  background: var(--accent-fill-hover);
  border-color: var(--accent-fill-hover);
}

.admin-btn--danger {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-soft);
}

.admin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 1.25rem;
}

@media (max-width: 880px) {
  .admin-grid {
    grid-template-columns: 1fr;
  }
}

.admin-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}

.admin-card h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.admin-field {
  margin-bottom: 0.85rem;
}

.admin-field:last-child {
  margin-bottom: 0;
}

.admin-field--inline-check {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.admin-field--inline-check .admin-label--checkbox {
  margin: 0;
  padding-top: 0.15rem;
  font-weight: 500;
  text-transform: none;
  letter-spacing: normal;
  line-height: 1.35;
}

.admin-readonly {
  font-size: 0.8125rem;
  color: var(--muted);
  word-break: break-all;
}

.admin-choices {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem;
  margin-top: 0.35rem;
}

.admin-choice-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.45rem;
}

.admin-choice-row:last-child {
  margin-bottom: 0;
}

.admin-choice-id {
  width: 3rem;
  flex-shrink: 0;
}

.admin-choice-label {
  flex: 1 1 12rem;
  min-width: 0;
}

.admin-choice-correct {
  flex-shrink: 0;
}

.admin-muted {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

.admin-hidden {
  display: none !important;
}

/* Admin: Assessments vs Learn */
.admin-mode-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--admin-btn-gap);
  margin-bottom: 1rem;
}

.admin-mode-tab {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}

.admin-mode-tab:hover {
  color: var(--text);
  border-color: var(--muted);
}

.admin-mode-tab--current {
  color: var(--text);
  border-color: var(--accent-fill);
  background: var(--accent-soft, rgba(13, 110, 253, 0.08));
}

.admin-tab-panel {
  min-width: 0;
}

.admin-char-count {
  margin: 0.35rem 0 0;
  font-size: 0.8125rem;
}

/* Lesson / course editor (admin → Content) */
.lesson-add-toolbar {
  align-items: center;
  margin-bottom: 1rem;
}

.lesson-meta-card {
  margin-bottom: 1.25rem;
}

.course-section-editor {
  margin-bottom: 1.25rem;
}

details.admin-card.course-section-editor.course-section-editor--collapsible {
  padding: 0;
}

details.admin-card.course-section-editor.course-section-editor--collapsible > summary {
  list-style: none;
}

details.admin-card.course-section-editor.course-section-editor--collapsible
  > summary::-webkit-details-marker {
  display: none;
}

.course-section-editor__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--admin-btn-gap) var(--admin-toolbar-gap-col);
  cursor: pointer;
  padding: 0.65rem 0.85rem;
  margin: 0;
  user-select: none;
}

.course-section-editor__title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
}

.course-section-editor__title::before {
  content: "\25b6";
  display: inline-block;
  margin-right: 0.4rem;
  font-size: 0.65rem;
  opacity: 0.65;
  transition: transform 0.12s ease;
  vertical-align: 0.05em;
}

details.admin-card.course-section-editor.course-section-editor--collapsible[open]
  .course-section-editor__title::before {
  transform: rotate(90deg);
}

.course-section-editor__actions {
  flex-shrink: 0;
}

.course-section-editor__body {
  padding: 0 0.85rem 0.85rem;
  border-top: 1px solid var(--border);
}

.lesson-blocks-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.lesson-block-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

details.lesson-block-card.lesson-block-card-collapsible {
  padding: 0;
}

.lesson-block-card-collapsible > summary {
  list-style: none;
}

.lesson-block-card-collapsible > summary::-webkit-details-marker {
  display: none;
}

.lesson-block-card-collapsible__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--admin-btn-gap) var(--admin-toolbar-gap-col);
  cursor: pointer;
  padding: 0.65rem 0.85rem;
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  user-select: none;
}

.lesson-block-card-collapsible__title::before {
  content: "\25b6";
  display: inline-block;
  margin-right: 0.4rem;
  font-size: 0.65rem;
  opacity: 0.65;
  transition: transform 0.12s ease;
}

.lesson-block-card-collapsible[open] .lesson-block-card-collapsible__title::before {
  transform: rotate(90deg);
}

.lesson-block-card-collapsible__title {
  flex: 1 1 auto;
  min-width: 0;
}

.lesson-block-card-collapsible__sum-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--admin-btn-gap);
  flex-shrink: 0;
}

.lesson-block-card-collapsible__body {
  padding: 0 0.85rem 0.85rem;
  border-top: 1px solid var(--border);
}

.lesson-accordion-panel-details {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  padding: 0;
}

.lesson-accordion-panel-details > summary {
  list-style: none;
  cursor: pointer;
  padding: 0.5rem 0.65rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}

.lesson-accordion-panel-details > summary::-webkit-details-marker {
  display: none;
}

.lesson-accordion-panel-details__summary::before {
  content: "\25b6";
  display: inline-block;
  margin-right: 0.35rem;
  font-size: 0.6rem;
  opacity: 0.7;
  transition: transform 0.12s ease;
}

.lesson-accordion-panel-details[open] .lesson-accordion-panel-details__summary::before {
  transform: rotate(90deg);
}

.lesson-accordion-panel-edit--inner {
  padding: 0.65rem 0.75rem 0.75rem;
  border-top: 1px solid var(--border);
  border-radius: 0;
  border: none;
  background: transparent;
}

.lesson-block-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--admin-btn-gap);
  margin-bottom: 0.65rem;
}

.lesson-block-card__label {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.lesson-block-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--admin-btn-gap);
}

.lesson-rich-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.lesson-rich-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.lesson-rich-btn {
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--border);
  background: var(--bg);
  cursor: pointer;
}

.lesson-rich-btn:hover {
  border-color: var(--muted);
}

.lesson-rich-editor {
  min-height: 8rem;
  line-height: 1.45;
}

.lesson-rich-editor:focus {
  outline: 2px solid var(--accent-fill);
  outline-offset: 1px;
}

.lesson-accordion-editor {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lesson-accordion-panel-edit {
  padding: 0.75rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

.lesson-block-advanced {
  margin-top: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  padding: 0;
}

.lesson-block-advanced__summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.55rem 0.75rem;
  color: var(--text);
  user-select: none;
}

.lesson-block-advanced__summary::-webkit-details-marker {
  display: none;
}

.lesson-block-advanced__summary::before {
  content: "\25b6";
  display: inline-block;
  margin-right: 0.4rem;
  font-size: 0.65rem;
  transform: translateY(-0.05em);
  transition: transform 0.15s ease;
}

.lesson-block-advanced[open] .lesson-block-advanced__summary::before {
  transform: rotate(90deg);
}

.lesson-block-advanced__body {
  padding: 0 0.75rem 0.85rem;
  border-top: 1px solid var(--border);
}

.lesson-block-advanced__hint {
  margin: 0.65rem 0 0.75rem;
  font-size: 0.8125rem;
}