html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

:root {
  --admin-bg: #f5f7fb;
  --admin-surface: #ffffff;
  --admin-border: #dfe5ef;
  --admin-muted: #667085;
  --admin-text: #1f2937;
  --admin-primary: #0d6efd;
  --admin-primary-soft: #e8f1ff;
  --admin-sidebar: #111827;
  --admin-sidebar-muted: #aeb8c8;
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.18);
}

html {
  position: relative;
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--admin-text);
  background: var(--admin-bg);
}

.admin-topbar {
  position: sticky;
  top: 0;
  z-index: 1020;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 1.5rem;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--admin-border);
  backdrop-filter: blur(10px);
}

.admin-topbar-title {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.admin-shell {
  display: flex;
  min-height: calc(100vh - 64px);
}

.admin-sidebar {
  position: sticky;
  top: 64px;
  width: 264px;
  height: calc(100vh - 64px);
  flex-direction: column;
  padding: 1rem;
  background: var(--admin-sidebar);
  transition: width 0.18s ease;
}

.admin-sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
}

.admin-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
  padding: 0.25rem 0.5rem;
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  min-width: 0;
}

.admin-brand:hover {
  color: #ffffff;
}

.admin-brand-mark,
.admin-avatar,
.admin-nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.admin-brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--admin-primary);
  color: #ffffff;
}

.admin-brand-text,
.admin-nav-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-collapse-btn {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  color: var(--admin-sidebar-muted);
  background: rgba(255, 255, 255, 0.08);
}

.admin-collapse-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.14);
}

.admin-avatar {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--admin-primary-soft);
  color: var(--admin-primary);
  font-weight: 700;
}

.admin-nav {
  display: grid;
  gap: 0.35rem;
}

.admin-nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 42px;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  color: var(--admin-sidebar-muted);
  text-decoration: none;
  transition: background 0.16s ease, color 0.16s ease, justify-content 0.16s ease;
}

.admin-nav-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.admin-nav-link.active {
  color: #ffffff;
  background: var(--admin-primary);
}

.admin-nav-icon {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 0.75rem;
  font-weight: 700;
}

.admin-nav-link.active .admin-nav-icon {
  background: rgba(255, 255, 255, 0.2);
}

.admin-content {
  width: 100%;
  padding: 1.5rem;
}

.admin-menu-minimized .admin-sidebar {
  width: 84px;
}

.admin-menu-minimized .admin-brand {
  justify-content: center;
}

.admin-menu-minimized .admin-brand-text,
.admin-menu-minimized .admin-nav-text {
  display: none;
}

.admin-menu-minimized .admin-sidebar-head {
  flex-direction: column;
}

.admin-menu-minimized .admin-collapse-btn i {
  transform: rotate(180deg);
}

.admin-menu-minimized .admin-nav-link {
  justify-content: center;
  padding-inline: 0.5rem;
}

.auth-content {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.page-kicker {
  color: var(--admin-primary);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.app-card {
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  background: var(--admin-surface);
  box-shadow: 0 8px 24px rgba(31, 41, 55, 0.04);
}

.filter-panel {
  border: 1px solid #d9e2ef;
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
  box-shadow: 0 8px 24px rgba(31, 41, 55, 0.04);
}

.filter-panel-header {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid #e7edf6;
}

.filter-panel-body {
  padding: 1rem;
}

.data-grid {
  border: 1px solid #d8e1ee;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 10px 28px rgba(31, 41, 55, 0.05);
  overflow: hidden;
}

.data-grid-toolbar {
  padding: 0.95rem 1rem;
  border-bottom: 1px solid #d8e1ee;
  background: #ffffff;
}

.app-card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--admin-border);
}

.app-card-body {
  padding: 1.25rem;
}

.app-table {
  margin-bottom: 0;
}

.app-table thead th {
  color: #475467;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  background: #eef3f9;
  border-bottom: 1px solid var(--admin-border);
}

.app-table tbody td {
  border-color: #eef2f7;
  padding: 0.9rem 1rem;
  vertical-align: middle;
}

.app-table tbody tr:hover {
  background: #f9fbff;
}

.badge-soft-success {
  color: #067647;
  background: #dcfae6;
}

.badge-soft-danger {
  color: #b42318;
  background: #fee4e2;
}

.badge-soft-secondary {
  color: #475467;
  background: #eef2f7;
}

.form-label {
  font-weight: 600;
}

.form-text {
  color: var(--admin-muted);
}

.empty-state {
  max-width: 420px;
  margin: 0 auto;
}

.empty-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  border-radius: 8px;
  color: var(--admin-primary);
  background: var(--admin-primary-soft);
}

.label-with-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.hint-icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #b9c6d8;
  border-radius: 50%;
  color: var(--admin-muted);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
  cursor: help;
  background: #ffffff;
}

.hint-icon:hover {
  color: var(--admin-primary);
  border-color: var(--admin-primary);
  background: var(--admin-primary-soft);
}

.record-title {
  font-weight: 700;
  color: var(--admin-text);
}

.record-subtitle {
  max-width: 460px;
  margin-top: 0.2rem;
  color: var(--admin-muted);
  font-size: 0.88rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.country-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.55rem;
  border: 1px solid #e4eaf3;
  border-radius: 8px;
  color: #344054;
  background: #ffffff;
  font-size: 0.88rem;
}

.table-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.btn-icon {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border-radius: 8px;
}

.form-grid {
  display: grid;
  gap: 1rem;
}

.editor-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 1rem;
  align-items: start;
}

.editor-main {
  border: 1px solid #d7e0ed;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 10px 30px rgba(31, 41, 55, 0.05);
}

.editor-main form {
  padding: 1.25rem;
}

.editor-section {
  padding: 1rem;
  border: 1px solid #e3e9f2;
  border-radius: 8px;
  background: #ffffff;
}

.editor-section + .editor-section {
  margin-top: 1rem;
}

.editor-section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.editor-section-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--admin-primary);
  background: var(--admin-primary-soft);
}

.editor-side {
  display: grid;
  gap: 1rem;
}

.side-panel {
  padding: 1rem;
  border: 1px solid #dfe5ef;
  border-radius: 8px;
  background: #f8fbff;
}

.guidance-list {
  display: grid;
  gap: 0.55rem;
  color: #475467;
  font-size: 0.9rem;
}

.guidance-list div {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
}

.guidance-list i {
  color: #067647;
  margin-top: 0.1rem;
}

.form-panel {
  padding: 1rem;
  border: 1px solid #e4eaf3;
  border-radius: 8px;
  background: #fbfcff;
}

.form-panel-title {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  color: #344054;
  font-weight: 700;
}

.status-switch {
  min-height: 46px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid #dfe5ef;
  border-radius: 8px;
  background: #ffffff;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding-top: 1rem;
  margin-top: 1rem;
  border-top: 1px solid var(--admin-border);
}

.validation-summary-valid {
  display: none;
}

.subject-workspace {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.subject-rail {
  position: sticky;
  top: 80px;
  max-height: calc(100vh - 96px);
  padding: 1rem;
  border: 1px solid #d8e1ee;
  border-radius: 8px;
  background: #ffffff;
  overflow: auto;
  box-shadow: 0 10px 28px rgba(31, 41, 55, 0.05);
}

.subject-search {
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid #e4eaf3;
}

.subject-list {
  display: grid;
  gap: 0.5rem;
}

.subject-list-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  padding: 0.75rem;
  border: 1px solid #e4eaf3;
  border-radius: 8px;
  color: var(--admin-text);
  text-decoration: none;
  background: #ffffff;
}

.subject-list-item:hover {
  border-color: #b7c7dd;
  background: #f8fbff;
}

.subject-list-item.active {
  border-color: var(--admin-primary);
  background: var(--admin-primary-soft);
}

.subject-list-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  border-radius: 8px;
  color: var(--admin-primary);
  background: #eef4ff;
}

.subject-list-title,
.subject-list-subtitle {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.subject-list-title {
  font-weight: 700;
}

.subject-list-subtitle {
  color: var(--admin-muted);
  font-size: 0.82rem;
}

.subject-main {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.subject-hero,
.workspace-panel {
  border: 1px solid #d8e1ee;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 10px 28px rgba(31, 41, 55, 0.05);
}

.subject-hero {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem;
}

.subject-hero-actions {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.subject-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.metric-tile {
  padding: 0.9rem 1rem;
  border: 1px solid #dfe7f2;
  border-radius: 8px;
  background: #ffffff;
}

.metric-tile span {
  display: block;
  color: var(--admin-muted);
  font-size: 0.82rem;
}

.metric-tile strong {
  display: block;
  margin-top: 0.1rem;
  font-size: 1.45rem;
}

.workspace-panel {
  overflow: hidden;
}

.workspace-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid #e4eaf3;
}

.workspace-panel > .row,
.workspace-panel > .stack-list {
  padding: 1rem;
}

.workspace-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.workspace-grid .workspace-panel:first-child {
  grid-row: span 2;
}

.content-card {
  min-height: 92px;
  padding: 1rem;
  border: 1px solid #e4eaf3;
  border-radius: 8px;
  background: #fbfcff;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  border-top: 1px solid #e4eaf3;
  background: #fbfcff;
}

.stack-list {
  display: grid;
  gap: 0.65rem;
}

.stack-item,
.definition-item {
  padding: 0.75rem;
  border: 1px solid #e4eaf3;
  border-radius: 8px;
  background: #ffffff;
}

.stack-item {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.stack-item small {
  display: block;
  color: var(--admin-muted);
  margin-top: 0.15rem;
}

.definition-item summary {
  cursor: pointer;
  font-weight: 700;
}

.definition-item summary span {
  display: block;
  margin-top: 0.15rem;
  color: var(--admin-muted);
  font-size: 0.82rem;
  font-weight: 400;
}

.definition-item p {
  margin: 0.75rem 0 0;
  color: #344054;
}

.subject-flow {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
}

.flow-column {
  display: grid;
  align-content: start;
  gap: 0.65rem;
}

.flow-column-title {
  color: #475467;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.flow-chip,
.flow-empty,
.flow-warning,
.index-card {
  border: 1px solid #e4eaf3;
  border-radius: 8px;
  background: #ffffff;
}

.flow-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.7rem 0.8rem;
  font-weight: 600;
}

.flow-chip i,
.flow-warning i {
  color: var(--admin-primary);
}

.flow-chip span {
  color: var(--admin-muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.flow-empty,
.flow-warning {
  padding: 0.8rem;
  color: var(--admin-muted);
  font-size: 0.9rem;
}

.flow-warning {
  display: flex;
  gap: 0.5rem;
  color: #b54708;
  background: #fffaeb;
  border-color: #fedf89;
}

.index-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem;
  color: var(--admin-text);
  text-decoration: none;
}

.index-card:hover {
  border-color: #b7c7dd;
  background: #f8fbff;
}

.index-card.active {
  border-color: var(--admin-primary);
  background: var(--admin-primary-soft);
}

.index-card strong,
.index-card small {
  display: block;
}

.index-card small {
  color: var(--admin-muted);
  margin-top: 0.15rem;
}

.index-card-count {
  min-width: 46px;
  padding: 0.35rem 0.45rem;
  border-radius: 8px;
  color: #344054;
  background: #eef2f7;
  font-size: 0.82rem;
  font-weight: 700;
  text-align: center;
}

.index-focus {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid #c7d7ee;
  border-radius: 8px;
  background: #f8fbff;
}

.builder-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.75fr);
  gap: 1rem;
  align-items: start;
}

.builder-main-panel {
  min-width: 0;
}

.timeline-builder {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
}

.timeline-row {
  display: grid;
  grid-template-columns: 42px 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem;
  border: 1px solid #dfe7f2;
  border-radius: 8px;
  background: #ffffff;
}

.timeline-row.needs-work {
  border-color: #fecdca;
  background: #fffbfa;
}

.timeline-order,
.timeline-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 700;
}

.timeline-order {
  color: #344054;
  background: #eef2f7;
}

.timeline-icon {
  color: var(--admin-primary);
  background: var(--admin-primary-soft);
}

.timeline-body {
  min-width: 0;
}

.timeline-body strong,
.timeline-body small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timeline-body small {
  color: var(--admin-muted);
}

.timeline-alert {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.35rem;
  color: #b42318;
  font-size: 0.82rem;
  font-weight: 600;
}

.concept-map {
  display: grid;
  gap: 0.65rem;
  padding: 1rem;
}

.map-parent,
.map-center,
.map-children span {
  border: 1px solid #e4eaf3;
  border-radius: 8px;
  background: #ffffff;
}

.map-parent {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 0.75rem;
  color: #344054;
}

.map-center {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  padding: 0.85rem;
  border-color: var(--admin-primary);
  background: var(--admin-primary-soft);
}

.map-center span,
.map-children span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  font-weight: 700;
}

.map-center span {
  color: #084298;
  background: #ffffff;
}

.map-children {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.map-children span {
  color: #344054;
  font-size: 0.88rem;
}

.map-children small {
  color: var(--admin-muted);
  font-weight: 600;
}

.question-item {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem;
  border: 1px solid #e4eaf3;
  border-radius: 8px;
  background: #fbfcff;
}

.question-item small {
  color: var(--admin-muted);
}

.admin-mobile-sidebar {
  background: var(--admin-sidebar);
  color: #ffffff;
}

@media (max-width: 991.98px) {
  .admin-content {
    padding: 1rem;
  }

  .page-header {
    flex-direction: column;
  }

  .editor-layout {
    grid-template-columns: 1fr;
  }

  .subject-workspace,
  .workspace-grid,
  .subject-metrics,
  .subject-flow,
  .builder-grid {
    grid-template-columns: 1fr;
  }

  .timeline-row {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .timeline-icon {
    display: none;
  }

  .subject-rail {
    position: static;
    max-height: none;
  }

  .subject-hero {
    flex-direction: column;
  }
}