/**
 * CrossLife Premium Design System
 * Shared tokens & components — Notion / Linear / Vercel inspired
 */

:root {
  /* Typography */
  --cl-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --cl-font-display: 'DM Sans', var(--cl-font);

  /* Surfaces */
  --cl-bg: #fafafa;
  --cl-bg-muted: #f4f4f5;
  --cl-surface: #ffffff;
  --cl-surface-raised: #ffffff;
  --cl-border: #e4e4e7;
  --cl-border-subtle: #f4f4f5;

  /* Text */
  --cl-text: #09090b;
  --cl-text-secondary: #52525b;
  --cl-text-muted: #a1a1aa;
  --cl-text-inverse: #fafafa;

  /* Brand — CrossLife orange */
  --cl-brand: #c85716;
  --cl-brand-hover: #a34612;
  --cl-brand-subtle: #fff7ed;
  --cl-brand-muted: #fed7aa;
  --cl-brand-ring: rgba(200, 87, 22, 0.22);

  /* Semantic */
  --cl-success: #16a34a;
  --cl-success-subtle: #f0fdf4;
  --cl-warning: #ca8a04;
  --cl-warning-subtle: #fefce8;
  --cl-danger: #dc2626;
  --cl-danger-subtle: #fef2f2;
  --cl-info: #2563eb;
  --cl-info-subtle: #eff6ff;

  /* Layout */
  --cl-sidebar-width: 268px;
  --cl-header-height: 64px;
  --cl-radius-sm: 6px;
  --cl-radius: 10px;
  --cl-radius-lg: 14px;
  --cl-radius-xl: 18px;
  --cl-radius-full: 9999px;

  /* Elevation */
  --cl-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --cl-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --cl-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --cl-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

  /* Motion */
  --cl-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --cl-duration: 0.18s;

  /* Dark sidebar */
  --cl-sidebar-bg: #09090b;
  --cl-sidebar-surface: #18181b;
  --cl-sidebar-border: rgba(255, 255, 255, 0.06);
  --cl-sidebar-text: #a1a1aa;
  --cl-sidebar-text-hover: #fafafa;
  --cl-sidebar-active-bg: rgba(200, 87, 22, 0.12);
  --cl-sidebar-active-text: #fb923c;
}

/* ------------------------------------------------------------------ Base */
.cl-admin,
.cl-student {
  font-family: var(--cl-font);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--cl-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.cl-admin h1, .cl-admin h2, .cl-admin h3, .cl-admin h4, .cl-admin h5, .cl-admin h6,
.cl-student h1, .cl-student h2, .cl-student h3, .cl-student h4, .cl-student h5, .cl-student h6 {
  font-family: var(--cl-font-display);
  letter-spacing: -0.02em;
  color: var(--cl-text);
}

/* ------------------------------------------------------------------ Cards */
.cl-card,
.cl-admin .card,
.cl-student .student-card.card {
  background: var(--cl-surface);
  border: 1px solid var(--cl-border);
  border-radius: var(--cl-radius-lg);
  box-shadow: var(--cl-shadow-xs);
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.cl-admin .card-header,
.cl-student .student-card .card-header {
  background: transparent;
  border-bottom: 1px solid var(--cl-border-subtle);
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--cl-text);
}

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

.cl-card--flat {
  box-shadow: none;
}

/* ------------------------------------------------------------------ Buttons */
.cl-admin .btn-primary,
.cl-student .btn-primary {
  background: var(--cl-brand);
  border-color: var(--cl-brand);
  font-weight: 500;
  border-radius: var(--cl-radius);
  padding: 0.5rem 1rem;
  box-shadow: var(--cl-shadow-xs);
  transition: background var(--cl-duration) var(--cl-ease), transform var(--cl-duration) var(--cl-ease);
}

.cl-admin .btn-primary:hover,
.cl-student .btn-primary:hover {
  background: var(--cl-brand-hover);
  border-color: var(--cl-brand-hover);
  transform: translateY(-1px);
}

.cl-admin .btn-outline-primary,
.cl-student .btn-outline-primary {
  color: var(--cl-brand);
  border-color: var(--cl-border);
  border-radius: var(--cl-radius);
  font-weight: 500;
}

.cl-admin .btn-outline-primary:hover,
.cl-student .btn-outline-primary:hover {
  background: var(--cl-brand-subtle);
  border-color: var(--cl-brand-muted);
  color: var(--cl-brand-hover);
}

.cl-admin .btn,
.cl-student .btn {
  border-radius: var(--cl-radius);
  font-weight: 500;
  font-size: 0.875rem;
}

.cl-admin .btn-sm,
.cl-student .btn-sm {
  border-radius: var(--cl-radius-sm);
  padding: 0.35rem 0.75rem;
}

/* ELMS accent buttons → brand */
.btn-elms-accent,
.btn-accent {
  background: var(--cl-brand) !important;
  border: none !important;
  border-radius: var(--cl-radius) !important;
  font-weight: 500 !important;
  color: #fff !important;
}

.btn-elms-accent:hover,
.btn-accent:hover {
  background: var(--cl-brand-hover) !important;
  color: #fff !important;
}

.btn-outline-elms {
  border-color: var(--cl-border) !important;
  color: var(--cl-brand) !important;
  border-radius: var(--cl-radius) !important;
}

.btn-outline-elms:hover {
  background: var(--cl-brand-subtle) !important;
  border-color: var(--cl-brand-muted) !important;
}

/* ------------------------------------------------------------------ Forms */
.cl-admin .form-control,
.cl-admin .form-select,
.cl-student .form-control,
.cl-student .form-select {
  border: 1px solid var(--cl-border);
  border-radius: var(--cl-radius);
  padding: 0.55rem 0.85rem;
  font-size: 0.875rem;
  background: var(--cl-surface);
  transition: border-color var(--cl-duration), box-shadow var(--cl-duration);
}

.cl-admin .form-control:focus,
.cl-admin .form-select:focus,
.cl-student .form-control:focus,
.cl-student .form-select:focus {
  border-color: var(--cl-brand);
  box-shadow: 0 0 0 3px var(--cl-brand-ring);
}

.cl-admin .form-label,
.cl-student .form-label {
  font-weight: 500;
  font-size: 0.8125rem;
  color: var(--cl-text-secondary);
  margin-bottom: 0.35rem;
}

.cl-admin .form-control-sm,
.cl-admin .form-select-sm {
  border-radius: var(--cl-radius-sm);
}

/* ------------------------------------------------------------------ Tables */
.cl-admin .table {
  --bs-table-bg: transparent;
  font-size: 0.875rem;
}

.cl-admin .table thead th {
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--cl-text-muted);
  border-bottom: 1px solid var(--cl-border);
  padding: 0.75rem 1rem;
  background: var(--cl-bg-muted);
}

.cl-admin .table tbody td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--cl-border-subtle);
  vertical-align: middle;
}

.cl-admin .table-hover tbody tr:hover {
  background: var(--cl-bg-muted);
}

/* ------------------------------------------------------------------ Badges */
.cl-admin .badge,
.cl-student .badge {
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
  padding: 0.3em 0.55em;
  border-radius: var(--cl-radius-sm);
}

.badge-admin {
  background: var(--cl-brand-subtle) !important;
  color: var(--cl-brand) !important;
  border: 1px solid var(--cl-brand-muted);
}

/* ------------------------------------------------------------------ Alerts */
.cl-admin .alert,
.cl-student .alert {
  border: 1px solid transparent;
  border-radius: var(--cl-radius);
  font-size: 0.875rem;
  padding: 0.85rem 1rem;
}

.cl-admin .alert-success,
.cl-student .alert-success {
  background: var(--cl-success-subtle);
  border-color: rgba(22, 163, 74, 0.2);
  color: #15803d;
}

.cl-admin .alert-danger,
.cl-student .alert-danger {
  background: var(--cl-danger-subtle);
  border-color: rgba(220, 38, 38, 0.2);
  color: #b91c1c;
}

.cl-admin .alert-warning,
.cl-student .alert-warning {
  background: var(--cl-warning-subtle);
  border-color: rgba(202, 138, 4, 0.2);
  color: #a16207;
}

.cl-admin .alert-info,
.cl-student .alert-info {
  background: var(--cl-info-subtle);
  border-color: rgba(37, 99, 235, 0.2);
  color: #1d4ed8;
}

/* ------------------------------------------------------------------ Nav tabs */
.cl-admin .nav-tabs {
  border-bottom: 1px solid var(--cl-border);
  gap: 0.25rem;
}

.cl-admin .nav-tabs .nav-link {
  border: none;
  border-radius: var(--cl-radius) var(--cl-radius) 0 0;
  color: var(--cl-text-muted);
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.65rem 1rem;
}

.cl-admin .nav-tabs .nav-link:hover {
  color: var(--cl-text);
  background: var(--cl-bg-muted);
}

.cl-admin .nav-tabs .nav-link.active {
  color: var(--cl-brand);
  background: transparent;
  border-bottom: 2px solid var(--cl-brand);
  margin-bottom: -1px;
}

/* ------------------------------------------------------------------ Page header */
.cl-page-header {
  margin-bottom: 1.5rem;
}

.cl-page-header h1,
.cl-page-header .cl-page-title {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
  letter-spacing: -0.025em;
}

.cl-page-header .cl-page-subtitle {
  color: var(--cl-text-muted);
  font-size: 0.875rem;
  margin: 0;
}

/* ------------------------------------------------------------------ Stat cards */
.cl-stat-card {
  background: var(--cl-surface);
  border: 1px solid var(--cl-border);
  border-radius: var(--cl-radius-lg);
  padding: 1.25rem;
  transition: box-shadow var(--cl-duration), border-color var(--cl-duration), transform var(--cl-duration);
  height: 100%;
}

.cl-stat-card:hover {
  box-shadow: var(--cl-shadow);
  border-color: var(--cl-brand-muted);
  transform: translateY(-2px);
}

.cl-stat-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--cl-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  background: var(--cl-brand-subtle);
  color: var(--cl-brand);
  flex-shrink: 0;
}

.cl-stat-card__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--cl-text-muted);
}

.cl-stat-card__value {
  font-family: var(--cl-font-display);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.cl-stat-card__meta {
  font-size: 0.8125rem;
  color: var(--cl-brand);
  font-weight: 500;
}

/* ------------------------------------------------------------------ DataTables premium */
.cl-admin .dataTables_wrapper .dataTables_filter input {
  border: 1px solid var(--cl-border);
  border-radius: var(--cl-radius-full);
  padding: 0.4rem 1rem;
  font-size: 0.875rem;
  background: var(--cl-surface);
  margin-left: 0.5rem;
}

.cl-admin .dataTables_wrapper .dataTables_filter input:focus {
  outline: none;
  border-color: var(--cl-brand);
  box-shadow: 0 0 0 3px var(--cl-brand-ring);
}

.cl-admin .dataTables_wrapper .dt-buttons .btn.btn-outline-secondary {
  border-color: var(--cl-border);
  color: var(--cl-text-secondary);
  border-radius: var(--cl-radius-sm);
}

.cl-admin .dataTables_wrapper .dt-buttons .btn.btn-outline-secondary:hover {
  background: var(--cl-brand-subtle);
  border-color: var(--cl-brand-muted);
  color: var(--cl-brand);
}

.cl-admin .page-item .page-link {
  border-radius: var(--cl-radius-sm);
  margin: 0 2px;
  border-color: var(--cl-border);
  color: var(--cl-text-secondary);
  font-size: 0.8125rem;
}

.cl-admin .page-item.active .page-link {
  background: var(--cl-brand);
  border-color: var(--cl-brand);
}

/* ------------------------------------------------------------------ Bulk toolbar */
.cl-bulk-toolbar {
  background: var(--cl-bg-muted);
  border: 1px solid var(--cl-border);
  border-radius: var(--cl-radius);
  padding: 0.65rem 0.85rem;
}

/* ------------------------------------------------------------------ Empty state */
.cl-empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--cl-text-muted);
}

.cl-empty-state i {
  font-size: 2.5rem;
  opacity: 0.35;
  margin-bottom: 1rem;
  display: block;
}

/* ------------------------------------------------------------------ Scrollbar */
.cl-admin ::-webkit-scrollbar,
.cl-student ::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

.cl-admin ::-webkit-scrollbar-thumb,
.cl-student ::-webkit-scrollbar-thumb {
  background: var(--cl-border);
  border-radius: 3px;
}

.cl-admin ::-webkit-scrollbar-thumb:hover,
.cl-student ::-webkit-scrollbar-thumb:hover {
  background: var(--cl-text-muted);
}