/* ============================================================================
   Admin UI — layout + table + form styles
   Builds on base.css variables
   ============================================================================ */

.admin-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.admin-sidebar {
  background: #0b1220;
  border-right: 1px solid var(--color-border);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.admin-sidebar h2 {
  font-size: 18px;
  color: var(--color-text);
  margin: var(--space-md) 0 var(--space-sm);
  padding: 0 var(--space-md);
}

.admin-sidebar .who {
  padding: var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.admin-sidebar .who-name {
  font-weight: 600;
  font-size: 16px;
}
.admin-sidebar .who-role {
  font-size: 13px;
  color: var(--color-text-muted);
}

.admin-sidebar a.nav {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: 15px;
  min-height: 44px;
}
.admin-sidebar a.nav:hover {
  background: var(--color-bg-card);
}
.admin-sidebar a.nav.active {
  background: var(--color-primary);
  color: white;
}

.admin-sidebar .nav-spacer {
  flex: 1;
}

.admin-main {
  padding: var(--space-lg);
  max-width: 100%;
  overflow-x: auto;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.admin-header h1 {
  font-size: 28px;
  margin: 0;
}

.admin-header .actions {
  display: flex;
  gap: var(--space-sm);
}

/* --- Stats cards --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.stat {
  background: var(--color-bg-card);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.stat .label {
  font-size: 13px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}
.stat .value {
  font-size: 32px;
  font-weight: 700;
}
.stat .sub {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* --- Filters bar --- */
.filters {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
  align-items: center;
}
.filters input[type="search"],
.filters input[type="text"],
.filters select {
  min-width: 200px;
  min-height: 40px;
  padding: var(--space-sm) var(--space-md);
}
.filters .toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 14px;
  cursor: pointer;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  min-height: 40px;
}
.filters .toggle input { width: auto; min-height: auto; margin: 0; }

/* --- Table --- */
.table-wrap {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-md);
}

.table {
  width: 100%;
  border-collapse: collapse;
}
.table th,
.table td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}
.table th {
  background: rgba(0,0,0,0.2);
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  position: sticky;
  top: 0;
}
.table tbody tr {
  cursor: pointer;
  transition: background 0.1s;
}
.table tbody tr:hover {
  background: rgba(59,130,246,0.08);
}
.table td.numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.table .badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  margin-right: 4px;
}
.badge-hot { background: rgba(245,158,11,0.2); color: #fde68a; border: 1px solid var(--color-warn); }
.badge-active { background: rgba(16,185,129,0.2); color: #6ee7b7; border: 1px solid var(--color-success); }
.badge-inactive { background: rgba(148,163,184,0.2); color: #94a3b8; border: 1px solid #64748b; }
.badge-role { background: rgba(59,130,246,0.2); color: #93c5fd; border: 1px solid var(--color-primary); }
.badge-class { background: rgba(168,85,247,0.2); color: #d8b4fe; border: 1px solid #a855f7; }

.pagination {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
}
.pagination .info { color: var(--color-text-muted); font-size: 13px; }
.pagination button { min-height: 36px; padding: var(--space-xs) var(--space-md); }
.pagination button:disabled { opacity: 0.3; cursor: not-allowed; }

/* --- Modal --- */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: var(--space-md);
}
.modal {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  max-width: 700px; width: 100%;
  max-height: 90vh; overflow-y: auto;
  border: 1px solid var(--color-border);
}
.modal h2 {
  margin: 0 0 var(--space-md);
  font-size: 22px;
}
.modal-actions {
  display: flex; gap: var(--space-sm); justify-content: flex-end;
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}
.btn-danger {
  background: var(--color-danger); color: white;
}
.btn-danger:hover { background: #dc2626; }
.btn-success {
  background: var(--color-success); color: white;
}

/* --- Section heading inside admin pages --- */
.section-h {
  font-size: 18px;
  margin: var(--space-lg) 0 var(--space-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Loading + empty states --- */
.loading, .empty {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-muted);
}

/* --- Responsive: stack sidebar on mobile --- */
@media (max-width: 768px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }
  .admin-sidebar {
    position: relative;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-xs);
    padding: var(--space-sm);
  }
  .admin-sidebar h2,
  .admin-sidebar .who { display: none; }
  .admin-sidebar a.nav {
    flex: 1 1 auto;
    min-width: 100px;
    justify-content: center;
    font-size: 13px;
    padding: var(--space-sm);
  }
  .admin-sidebar .nav-spacer { display: none; }
}