.admin-page {
  background:
    radial-gradient(circle at 12% 12%, rgba(249, 115, 22, 0.08) 0%, transparent 24%),
    radial-gradient(circle at 84% 8%, rgba(14, 165, 233, 0.08) 0%, transparent 22%),
    linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
}

.admin-page .content {
  max-width: 1440px;
}

.admin-shell {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.admin-hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 28px 30px;
  border-radius: var(--radius-2xl);
  background:
    radial-gradient(circle at 86% 18%, rgba(251, 191, 36, 0.24) 0%, transparent 16%),
    linear-gradient(135deg, #111827 0%, #1e293b 48%, #0f766e 100%);
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.admin-hero-copy {
  max-width: 760px;
}

.admin-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.14);
  font-size: 12px;
  margin-bottom: 14px;
}

.admin-hero-title {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.2;
  margin-bottom: 10px;
}

.admin-hero-subtitle {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,0.78);
}

.admin-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.admin-chip {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  font-size: 12px;
  color: rgba(255,255,255,0.9);
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.admin-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid transparent;
  white-space: nowrap;
}

.admin-btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #f97316, #ea580c);
  box-shadow: 0 10px 20px rgba(249, 115, 22, 0.24);
}

.admin-btn-secondary {
  color: #fff;
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.14);
}

.admin-grid-4,
.admin-grid-3,
.admin-grid-2 {
  display: grid;
  gap: 18px;
}

.admin-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.admin-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.admin-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.admin-card {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  padding: 22px 24px;
}

.admin-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.admin-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.admin-card-title-spaced {
  margin-top: 18px;
}

.admin-card-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.admin-stat-value {
  font-family: var(--font-display);
  font-size: 30px;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.admin-stat-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.admin-stat-desc {
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.admin-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.admin-pill.green { background: #ecfdf5; color: #047857; }
.admin-pill.blue { background: #eff6ff; color: #1d4ed8; }
.admin-pill.amber { background: #fffbeb; color: #b45309; }
.admin-pill.rose { background: #fff1f2; color: #be123c; }
.admin-pill.slate { background: #f8fafc; color: #475569; }

.admin-list {
  display: grid;
  gap: 12px;
}

.admin-list-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--bg-card-soft);
  border: 1px solid var(--border-soft);
}

.admin-list-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.admin-list-desc {
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.admin-table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 13px 10px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 13px;
}

.admin-table th {
  color: var(--text-muted);
  font-weight: 700;
}

.admin-table td {
  color: var(--text-primary);
}

.admin-course-title {
  font-weight: 700;
}

.admin-course-created {
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 12px;
  white-space: nowrap;
}

.admin-table-selected td {
  background: #fff7ed;
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.admin-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.admin-filter {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  font-size: 12px;
  color: var(--text-secondary);
}

.admin-filter.active {
  background: #fff7ed;
  border-color: #fdba74;
  color: #c2410c;
  font-weight: 700;
}

.admin-note {
  padding: 14px 16px;
  border-radius: 14px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #9a3412;
  font-size: 12px;
  line-height: 1.75;
}

.admin-form {
  display: grid;
  gap: 16px;
}

.admin-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.admin-field {
  display: grid;
  gap: 8px;
}

.admin-field-span-2 {
  grid-column: span 2;
}

.admin-field-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
}

.admin-input,
.admin-select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  background: #fff;
  color: var(--text-primary);
  font-size: 13px;
}

.admin-input[readonly] {
  background: #f8fafc;
  color: var(--text-muted);
}

.admin-form-status {
  padding: 12px 14px;
  border-radius: 12px;
  background: #f8fafc;
  color: #475569;
  font-size: 12px;
  line-height: 1.7;
  border: 1px solid #e2e8f0;
}

.admin-form-status[data-tone="success"] {
  background: #ecfdf5;
  border-color: #a7f3d0;
  color: #047857;
}

.admin-form-status[data-tone="error"] {
  background: #fff1f2;
  border-color: #fecdd3;
  color: #be123c;
}

.admin-btn-light {
  background: #fff;
  border-color: var(--border-light);
  color: var(--text-primary);
}

.admin-btn-danger {
  color: #fff;
  background: linear-gradient(135deg, #e11d48, #be123c);
  box-shadow: 0 10px 20px rgba(190, 18, 60, 0.18);
}

.admin-row-action {
  min-height: 34px;
  padding: 8px 12px;
}

.admin-select-inline {
  min-width: 260px;
}

.admin-textarea {
  width: 100%;
  min-height: 132px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  background: #fff;
  color: var(--text-primary);
  font-size: 13px;
  resize: vertical;
}

.admin-cover-panel {
  display: grid;
  grid-template-columns: minmax(0, 360px);
  gap: 12px;
  align-items: start;
  width: min(100%, 360px);
  padding: 14px;
  border-radius: 14px;
  background: var(--bg-card-soft);
  border: 1px solid var(--border-soft);
}

.admin-cover-preview-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(135deg, #173454 0%, #0f766e 100%);
}

.admin-cover-preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.admin-cover-actions {
  display: grid;
  gap: 10px;
}

.admin-cover-file {
  min-height: 44px;
}

.admin-login-page {
  min-height: 100vh;
}

.admin-login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.admin-login-card {
  width: min(100%, 480px);
  padding: 32px;
  border-radius: var(--radius-2xl);
  background: #fff;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-lg);
}

.admin-section-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}

@media (max-width: 1280px) {
  .admin-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .admin-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .admin-hero,
  .admin-toolbar,
  .admin-grid-2,
  .admin-grid-3,
  .admin-grid-4 {
    grid-template-columns: 1fr;
  }

  .admin-grid-2,
  .admin-grid-3,
  .admin-grid-4 {
    display: grid;
  }

  .admin-cover-panel {
    grid-template-columns: 1fr;
  }

  .admin-form-grid {
    grid-template-columns: 1fr;
  }

  .admin-field-span-2 {
    grid-column: span 1;
  }

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

@media (max-width: 620px) {
  .admin-hero {
    padding: 24px 20px;
  }

  .admin-hero-title {
    font-size: 28px;
  }

  .admin-card,
  .admin-list-item {
    padding: 18px;
  }
}