:root {
  color-scheme: light;
  --bg: #eef2ff;
  --surface: #ffffff;
  --surface-strong: #f8fbff;
  --surface-muted: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --border: #d1d5db;
  --primary: #6366f1;
  --primary-soft: #eef2ff;
  --accent: #fb923c;
  --success: #22c55e;
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.08);
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #050816;
  --surface: #111827;
  --surface-strong: #1f2937;
  --surface-muted: #111827;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
  --primary: #818cf8;
  --primary-soft: #1e293b;
  --accent: #f97316;
  --success: #22c55e;
  --shadow: 0 24px 120px rgba(15, 23, 42, 0.65);
}

body {
  margin: 0;
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(circle at top left, rgba(99, 102, 241, 0.18), transparent 22%),
              radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.16), transparent 18%),
              var(--bg);
  color: var(--text);
}

a {
  color: var(--primary);
}

a:hover {
  color: var(--accent);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px 1fr;
}

.app-sidebar {
  position: sticky;
  top: 0;
  min-height: 100vh;
  padding: 2rem 1.25rem;
  background: var(--surface-strong);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.app-nav {
  display: none;
  padding: 0.75rem 0 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.app-nav .sidebar-link {
  display: inline-flex;
  padding: 0.85rem 1rem;
  border-radius: 16px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  color: var(--text);
}

.app-nav .sidebar-link:hover {
  color: var(--primary);
  background: var(--surface);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.sidebar-title {
  margin: 0;
  font-size: 1.1rem;
}

.sidebar-nav {
  display: grid;
  gap: 0.85rem;
}

.sidebar-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  color: var(--text);
  background: transparent;
  border: 1px solid transparent;
  font-weight: 600;
  transition: all 0.2s ease;
}

.sidebar-link i {
  width: 20px;
  text-align: center;
  color: var(--muted);
}

.sidebar-link span {
  flex: 1;
}

.sidebar-link:hover,
.sidebar-link.active {
  background: var(--surface);
  border-color: var(--border);
  color: var(--primary);
}

.sidebar-link:hover i,
.sidebar-link.active i {
  color: var(--primary);
}

.theme-toggle-link {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
}

.theme-toggle-link:hover,
.theme-toggle-link.active {
  background: var(--surface);
  border-color: var(--border);
  color: var(--primary);
}

.theme-toggle-link:hover i,
.theme-toggle-link.active i {
  color: var(--primary);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.app-main {
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.header-actions {
  display: flex;
  align-items: center;
}

.app-content {
  flex: 1;
  padding: 1.5rem 1.5rem 2rem;
  width: 100%;
  max-width: none;
  margin: 0;
}

.header-brand {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  width: 100%;
}

.header-copy {
  display: grid;
  gap: 0.25rem;
}

.header-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  white-space: nowrap;
  text-align: right;
}

@media (max-width: 992px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .app-sidebar {
    position: relative;
    min-height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .app-header {
    padding: 1rem 1.25rem;
  }
}

@media (max-width: 768px) {
  .app-header,
  .app-content,
  .app-footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

@media (max-width: 576px) {
  .sidebar-nav {
    display: none;
  }
  .app-sidebar {
    display: none;
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.metric-card,
.card-panel,
.list-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.metric-card h3,
.card-panel h2,
.list-card h2 {
  margin-top: 0;
  color: var(--text);
}

.metric-value {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0.35rem 0 0;
}

.metric-label {
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.card-panel p,
.list-card p {
  color: var(--muted);
  margin: 0.75rem 0 0;
}

.card-panel .card-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(300px, 1fr));
  gap: 1.5rem;
  align-items: start;
}

.card-panel .card-row .bullet-list {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.card-panel .card-row .bullet-list li {
  margin-bottom: 0.65rem;
}

.table-responsive {
  background: var(--surface);
  border-radius: 24px;
  padding: 1rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

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

.table thead th {
  border-bottom: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
}

.table tbody tr {
  background: transparent;
}

.dataTables_wrapper .dataTables_paginate,
.dataTables_wrapper .dataTables_info {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.dataTables_wrapper .dataTables_paginate {
  margin: 0;
}

.dataTables_wrapper .dataTables_info {
  white-space: nowrap;
  color: var(--muted);
}

.table tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.05);
}

.table-hover tbody tr:hover {
  background: rgba(255, 255, 255, 0.12);
}

.table-hover tbody tr:hover td,
.table-hover tbody tr:hover th {
  color: var(--text) !important;
}

.table td,
.table th {
  vertical-align: middle;
  border-top: none;
  color: var(--text);
}

.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select,
.dataTables_wrapper .dataTables_paginate .paginate_button {
  color: var(--text);
}

.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
  background: var(--surface);
  border: 1px solid var(--border);
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
  background: var(--surface-strong);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.25rem 0;
  color: var(--muted);
}

.app-footer {
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.btn-outline-primary {
  color: var(--text);
  border-color: var(--border);
  background: var(--surface-strong);
}

.btn-outline-primary:hover {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

@media (max-width: 992px) {
  .app-header {
    flex-wrap: wrap;
    align-items: stretch;
  }
  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
  .app-nav {
    display: flex;
    flex-wrap: wrap;
  }
  .app-content {
    width: calc(100% - 2rem);
  }
}

@media (max-width: 992px) {
  .card-panel .card-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .card-panel .card-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .hero-grid,
  .app-footer {
    display: block;
  }
  .nav-links {
    display: none;
  }
}