:root {
  --admin-bg: #f3f6f9;
  --admin-card: #ffffff;
  --admin-card-border: #d9e2ec;
  --admin-text: #1f2937;
  --admin-muted: #6b7280;
  --admin-sidebar: #1f2937;
  --admin-sidebar-soft: #1f2937;
  --admin-sidebar-border: rgba(148, 163, 184, 0.16);
  --admin-primary: #2563eb;
  --admin-primary-soft: #e8f0fe;
  --admin-success-soft: #e8f7ee;
  --admin-danger-soft: #fbeaea;
  --admin-warning-soft: #fff4db;
  --admin-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
}

body.admin-body {
  background: var(--admin-bg);
  color: var(--admin-text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 0.9rem;
  background: var(--admin-primary);
  color: #fff;
  font-weight: 700;
}

.admin-shell {
  min-height: 100vh;
}

.admin-sidebar {
  width: 232px;
  min-height: 100vh;
  position: fixed;
  inset: 0 auto 0 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--admin-sidebar);
  border-right: 1px solid var(--admin-sidebar-border);
  box-shadow: none;
}

.admin-sidebar .sidebar-scroll {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 1rem 0.7rem 0.9rem;
}

.nav-section {
  margin-bottom: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.03);
  overflow: hidden;
}

.nav-section-button {
  width: 100%;
  background: transparent;
  color: rgba(226, 232, 240, 0.92);
  border: 0;
  padding: 0.95rem 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-section-button:hover {
  background: rgba(255, 255, 255, 0.05);
}

.nav-section-button .section-title {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.nav-section .nav-link {
  color: rgba(226, 232, 240, 0.82);
  padding: 0.68rem 0.8rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0.18rem 0.4rem;
  font-weight: 500;
}

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

.nav-section .nav-link.active {
  color: #fff;
  background: var(--admin-primary);
  box-shadow: none;
}

.sidebar-footer {
  position: relative;
  margin: 0.75rem;
  padding: 0.95rem;
  border-radius: 0.9rem;
  background: #273244;
  border: 1px solid rgba(148, 163, 184, 0.18);
  backdrop-filter: none;
  flex: 0 0 auto;
  z-index: 2;
}

.sidebar-footer .admin-name {
  color: #fff;
  font-weight: 600;
}

.sidebar-footer .admin-role {
  color: rgba(191, 219, 254, 0.82);
  font-size: 0.82rem;
}

.sidebar-footer .btn {
  border-radius: 0.7rem;
}

.admin-content {
  margin-left: 232px;
  min-height: 100vh;
  padding: 2rem;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  margin: 0;
  font-size: 1.9rem;
  font-weight: 700;
}

.page-subtitle {
  margin-top: 0.35rem;
  color: var(--admin-muted);
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem;
}

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

.admin-card-header {
  padding: 1.15rem 1.25rem 0;
}

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

.admin-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
}

.admin-toolbar .toolbar-meta {
  color: var(--admin-muted);
  font-size: 0.92rem;
}

.metric-card {
  padding: 1.15rem 1.2rem;
  border-radius: 1rem;
  border: 1px solid var(--admin-card-border);
  background: #ffffff;
  box-shadow: var(--admin-shadow);
}

.metric-card .metric-label {
  color: var(--admin-muted);
  font-size: 0.92rem;
  margin-bottom: 0.45rem;
}

.metric-card .metric-value {
  font-size: 2rem;
  line-height: 1;
  font-weight: 700;
}

.metric-card .metric-hint {
  margin-top: 0.55rem;
  color: var(--admin-muted);
  font-size: 0.84rem;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1rem;
}

.filter-grid .span-3 {
  grid-column: span 3;
}

.filter-grid .span-4 {
  grid-column: span 4;
}

.filter-grid .span-6 {
  grid-column: span 6;
}

.filter-grid .span-12 {
  grid-column: span 12;
}

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

.admin-table thead th {
  background: #f8fafc;
  color: #475569;
  font-size: 0.84rem;
  font-weight: 700;
  border-bottom-width: 1px;
  white-space: nowrap;
}

.admin-table tbody td {
  vertical-align: middle;
}

.admin-table .table-primary-cell {
  min-width: 180px;
}

.admin-table .cell-title {
  font-weight: 600;
  color: var(--admin-text);
}

.admin-table .cell-subtitle {
  margin-top: 0.18rem;
  color: var(--admin-muted);
  font-size: 0.82rem;
}

.admin-pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
}

.description-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.95rem 1.2rem;
}

.description-item {
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}

.description-item .description-label {
  color: var(--admin-muted);
  font-size: 0.82rem;
  margin-bottom: 0.32rem;
}

.description-item .description-value {
  font-weight: 600;
  word-break: break-word;
}

.announcement-item {
  display: block;
}

.announcement-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--admin-text);
}

.announcement-meta {
  margin-top: 0.35rem;
  font-size: 0.84rem;
  color: var(--admin-muted);
}

.announcement-text {
  margin-top: 0.75rem;
  color: #334155;
  line-height: 1.7;
  white-space: pre-wrap;
}

.empty-panel {
  padding: 2.5rem 1.5rem;
  text-align: center;
}

.empty-panel .empty-icon {
  width: 3.4rem;
  height: 3.4rem;
  border-radius: 1.1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #e8f0fe;
  color: var(--admin-primary);
  font-size: 1.4rem;
}

.empty-panel .empty-title {
  margin-top: 0.95rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.empty-panel .empty-text {
  margin-top: 0.4rem;
  color: var(--admin-muted);
}

.btn {
  border-radius: 0.7rem;
  font-weight: 600;
  box-shadow: none !important;
}

.btn-soft-primary {
  background: var(--admin-primary-soft);
  color: var(--admin-primary);
  border-color: #c7d8fb;
}

.btn-soft-success {
  background: var(--admin-success-soft);
  color: #166534;
  border-color: #cdebd8;
}

.btn-soft-danger {
  background: var(--admin-danger-soft);
  color: #b91c1c;
  border-color: #f1c9c9;
}

.btn-soft-warning {
  background: var(--admin-warning-soft);
  color: #92400e;
  border-color: #f3ddb0;
}

.btn-soft-slate {
  background: #eef2f7;
  color: #334155;
  border-color: #d8e0ea;
}

.form-control,
.form-select {
  border-radius: 0.7rem;
  border-color: #cbd5e1;
  min-height: 2.8rem;
  background: #fff;
}

.upload-field {
  position: relative;
}

.upload-picker {
  min-height: 3rem;
  border-radius: 0.85rem;
  border: 1px solid #cbd5e1;
  background: #fff;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.45rem 0.55rem;
  cursor: pointer;
}

.upload-picker:hover {
  border-color: #94a3b8;
}

.upload-picker-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 6.5rem;
  min-height: 2.1rem;
  padding: 0 0.9rem;
  border-radius: 0.65rem;
  background: #eff6ff;
  color: var(--admin-primary);
  font-weight: 600;
}

.upload-picker-name {
  color: var(--admin-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.upload-input {
  position: absolute;
  inset: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.form-check.form-switch {
  min-height: 2.5rem;
}

.form-check-input {
  width: 2.7rem;
  height: 1.45rem;
}

.form-control:focus,
.form-select:focus {
  box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.08);
  border-color: #8fb3f4;
}

.list-group-item {
  border-color: rgba(148, 163, 184, 0.16);
}

.admin-sticky-actions {
  position: sticky;
  bottom: 0;
  background: linear-gradient(180deg, rgba(243, 246, 249, 0), #fff 38%);
  padding-top: 1rem;
}

@media (max-width: 1199.98px) {
  .filter-grid .span-3,
  .filter-grid .span-4,
  .filter-grid .span-6 {
    grid-column: span 6;
  }
}

@media (max-width: 991.98px) {
  .admin-sidebar {
    position: static;
    width: 100%;
    min-height: auto;
  }

  .sidebar-footer {
    position: static;
    margin-top: 1rem;
  }

  .admin-content {
    margin-left: 0;
    padding: 1.25rem;
  }

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

  .description-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767.98px) {
  .filter-grid .span-3,
  .filter-grid .span-4,
  .filter-grid .span-6,
  .filter-grid .span-12 {
    grid-column: span 12;
  }

  .admin-pagination {
    flex-direction: column;
    align-items: flex-start;
  }
}