/*
 * JIT Enterprise Design System
 * Modern enterprise-grade UI framework inspired by Linear, Stripe, GitHub, Framer
 * Version: 3.0.0
 *
 * Design Tokens: Colors, spacing, typography, shadows, radii
 * Components: Buttons, cards, tables, forms, badges, modals, toasts
 * Layout: Grid system, sidebar, header, navigation
 * Accessibility: Focus management, reduced motion, high contrast
 */

/* ============================================================
   DESIGN TOKENS
   ============================================================ */

:root {
  /* ─── Brand Palette ─── */
  --color-brand-50:  #fef1f5;
  --color-brand-100: #fde3ec;
  --color-brand-200: #fcc8d9;
  --color-brand-300: #f99bb8;
  --color-brand-400: #f5698e;
  --color-brand-500: #e83566;
  --color-brand-600: #d61a4d;
  --color-brand-700: #7A0C2E;
  --color-brand-800: #5F0823;
  --color-brand-900: #3d0514;

  /* ─── Neutral Palette ─── */
  --color-neutral-50:  #fafbfc;
  --color-neutral-100: #f4f5f7;
  --color-neutral-200: #e8eaed;
  --color-neutral-300: #d1d5db;
  --color-neutral-400: #9ca3af;
  --color-neutral-500: #6b7280;
  --color-neutral-600: #4b5563;
  --color-neutral-700: #374151;
  --color-neutral-800: #1f2937;
  --color-neutral-900: #111827;

  /* ─── Semantic Colors ─── */
  --color-success:     #16a34a;
  --color-success-bg:  #f0fdf4;
  --color-success-text:#166534;
  --color-warning:     #d97706;
  --color-warning-bg:  #fffbeb;
  --color-warning-text:#92400e;
  --color-danger:      #dc2626;
  --color-danger-bg:   #fef2f2;
  --color-danger-text: #991b1b;
  --color-info:        #2563eb;
  --color-info-bg:     #eff6ff;
  --color-info-text:   #1e40af;

  /* ─── Surface Colors ─── */
  --surface-primary:   #ffffff;
  --surface-secondary: var(--color-neutral-50);
  --surface-tertiary:  var(--color-neutral-100);
  --surface-hover:     rgba(15, 23, 42, 0.04);
  --surface-active:    rgba(15, 23, 42, 0.08);

  /* ─── Text Colors ─── */
  --text-primary:   var(--color-neutral-900);
  --text-secondary: var(--color-neutral-600);
  --text-tertiary:  var(--color-neutral-400);
  --text-inverse:   #ffffff;

  /* ─── Border Colors ─── */
  --border-primary:   var(--color-neutral-200);
  --border-secondary: var(--color-neutral-300);
  --border-subtle:    rgba(15, 23, 42, 0.06);

  /* ─── Shadow System ─── */
  --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md:  0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.03);
  --shadow-lg:  0 10px 15px rgba(0, 0, 0, 0.06), 0 4px 6px rgba(0, 0, 0, 0.04);
  --shadow-xl:  0 20px 25px rgba(0, 0, 0, 0.08), 0 8px 10px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.12);
  --shadow-ring: 0 0 0 3px rgba(122, 12, 46, 0.15);

  /* ─── Spacing Scale ─── */
  --space-0:  0px;
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-7:  32px;
  --space-8:  40px;
  --space-9:  48px;
  --space-10: 64px;
  --space-12: 80px;

  /* ─── Border Radius ─── */
  --radius-none:  0px;
  --radius-sm:    6px;
  --radius-md:    8px;
  --radius-lg:    12px;
  --radius-xl:    16px;
  --radius-2xl:   20px;
  --radius-full:  9999px;

  /* ─── Typography ─── */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Consolas, monospace;

  --text-xs:  0.75rem;   /* 12px */
  --text-sm:  0.8125rem; /* 13px */
  --text-base: 0.875rem; /* 14px */
  --text-lg:  1rem;      /* 16px */
  --text-xl:  1.125rem;  /* 18px */
  --text-2xl: 1.25rem;   /* 20px */
  --text-3xl: 1.5rem;    /* 24px */
  --text-4xl: 1.875rem;  /* 30px */
  --text-5xl: 2.25rem;   /* 36px */

  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-display: 800;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* ─── Transitions ─── */
  --transition-fast: 100ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ─── Z-Index Scale ─── */
  --z-dropdown:  1000;
  --z-sticky:    1020;
  --z-overlay:   1030;
  --z-modal:     1040;
  --z-popover:   1050;
  --z-toast:     1060;
  --z-tooltip:   1070;

  /* ─── Sidebar ─── */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 64px;
  --sidebar-bg: #ffffff;
  --sidebar-text: var(--text-primary);
  --sidebar-active-bg: var(--color-brand-50);
  --sidebar-active-text: var(--color-brand-700);
  --sidebar-hover-bg: var(--color-neutral-50);

  /* ─── Header ─── */
  --header-height: 56px;

  /* ─── Layout ─── */
  --page-max-width: 1280px;
  --page-padding: var(--space-6);
}


/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ============================================================
   BASE RESET & TYPOGRAPHY
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--color-neutral-50);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-3) 0;
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  line-height: var(--leading-tight);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin: 0 0 var(--space-3) 0;
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

a {
  color: var(--color-brand-700);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--color-brand-800);
}
a:focus-visible {
  outline: none;
  box-shadow: var(--shadow-ring);
  border-radius: var(--radius-sm);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}


/* ============================================================
   SKIP LINK (Accessibility)
   ============================================================ */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-brand-700);
  color: var(--text-inverse);
  border-radius: var(--radius-md);
  font-weight: var(--font-semibold);
  z-index: 9999;
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-4);
}


/* ============================================================
   FOCUS MANAGEMENT
   ============================================================ */

:focus-visible {
  outline: 2px solid var(--color-brand-700);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}


/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 8px 16px;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1.4;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-normal);
  user-select: none;
  -webkit-user-select: none;
  height: 36px;
}

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  box-shadow: var(--shadow-ring);
  outline: none;
}

/* Primary */
.btn-primary {
  background: var(--color-brand-700);
  color: var(--text-inverse);
  border-color: var(--color-brand-700);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-brand-800);
  border-color: var(--color-brand-800);
  box-shadow: var(--shadow-md);
}

/* Secondary */
.btn-secondary {
  background: var(--surface-secondary);
  color: var(--text-primary);
  border-color: var(--border-primary);
}
.btn-secondary:hover {
  background: var(--surface-tertiary);
  border-color: var(--border-secondary);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

/* Danger */
.btn-danger {
  background: var(--color-danger);
  color: var(--text-inverse);
  border-color: var(--color-danger);
}
.btn-danger:hover {
  background: #b91c1c;
  border-color: #b91c1c;
}

/* Success */
.btn-success {
  background: var(--color-success);
  color: var(--text-inverse);
  border-color: var(--color-success);
}
.btn-success:hover {
  background: #15803d;
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--color-brand-700);
  border-color: var(--border-secondary);
}
.btn-outline:hover {
  background: var(--color-brand-50);
  border-color: var(--color-brand-700);
}

/* Sizes */
.btn-sm {
  height: 30px;
  padding: 4px 12px;
  font-size: var(--text-xs);
}

.btn-lg {
  height: 44px;
  padding: 10px 24px;
  font-size: var(--text-base);
}

.btn-xl {
  height: 52px;
  padding: 12px 32px;
  font-size: var(--text-lg);
}

/* Icon-only button */
.btn-icon {
  width: 36px;
  padding: 0;
  justify-content: center;
}
.btn-icon.btn-sm {
  width: 30px;
}
.btn-icon.btn-lg {
}

/* Share button helpers */
.share-button,
.copy-link-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: var(--radius-md);
  padding: 8px 14px;
  transition: background-color var(--transition-normal), border-color var(--transition-normal), transform var(--transition-fast);
}

.share-button {
  border-color: var(--color-brand-700);
  color: var(--color-brand-700);
}

.share-button:hover,
.copy-link-button:hover {
  background: var(--surface-secondary);
}

.blog-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.blog-post-footer,
.blog-share-actions,
.featured-post,
.hero-section,
.page-hero,
.section-alt {
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.blog-post-content h2,
.blog-post-content h3,
.page-title,
.section-title {
  color: var(--color-brand-700);
}

.section-alt {
  background: #fff5f7;
}

.page-hero {
  background: linear-gradient(135deg, rgba(122, 12, 46, 0.12), rgba(255, 255, 255, 0.92));
}

.page-hero::before {
  background: radial-gradient(circle at 20% 20%, rgba(122, 12, 46, 0.12), transparent 45%);
}

/* Button group */
.btn-group {
  display: inline-flex;
  gap: var(--space-1);
}

.btn-group .btn + .btn {
  margin-left: -1px;
}
.btn-group .btn:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}
.btn-group .btn:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

/* Loading state */
.btn.is-loading {
  pointer-events: none;
  opacity: 0.7;
}
.btn.is-loading::after {
  content: '';
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}


/* ============================================================
   CARDS
   ============================================================ */

.card {
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
  overflow: hidden;
}
.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--surface-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.card-header h3, .card-header h4 {
  margin: 0;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-subtle);
  background: var(--surface-secondary);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
}

/* Stat Card */
.stat-card {
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  transition: all var(--transition-normal);
}
.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.stat-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--text-lg);
}
.stat-card-icon.primary {
  background: var(--color-brand-50);
  color: var(--color-brand-700);
}
.stat-card-icon.success {
  background: var(--color-success-bg);
  color: var(--color-success);
}
.stat-card-icon.warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}
.stat-card-icon.danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}
.stat-card-icon.info {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.stat-card-content {
  flex: 1;
}
.stat-card-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-1);
}
.stat-card-value {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}
.stat-card-change {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  margin-top: var(--space-1);
}
.stat-card-change.positive { color: var(--color-success); }
.stat-card-change.negative { color: var(--color-danger); }


/* ============================================================
   BADGES
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  line-height: 1.5;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-brand-100);
  color: var(--color-brand-800);
}
.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
}
.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
}
.badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
}
.badge-info {
  background: var(--color-info-bg);
  color: var(--color-info-text);
}
.badge-neutral {
  background: var(--color-neutral-100);
  color: var(--color-neutral-600);
}

.badge-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}


/* ============================================================
   ALERTS / TOASTS
   ============================================================ */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid;
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  position: relative;
}

.alert-success {
  background: var(--color-success-bg);
  border-color: #bbf7d0;
  color: var(--color-success-text);
}
.alert-warning {
  background: var(--color-warning-bg);
  border-color: #fde68a;
  color: var(--color-warning-text);
}
.alert-danger {
  background: var(--color-danger-bg);
  border-color: #fecaca;
  color: var(--color-danger-text);
}
.alert-info {
  background: var(--color-info-bg);
  border-color: #bfdbfe;
  color: var(--color-info-text);
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-dismiss {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  opacity: 0.6;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: opacity var(--transition-fast);
}
.alert-dismiss:hover {
  opacity: 1;
  background: rgba(0,0,0,0.05);
}

/* Toast container */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 400px;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  animation: toast-in 200ms ease-out;
  min-width: 300px;
}
.toast.toast-exit {
  animation: toast-out 200ms ease-in forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(20px); }
}


/* ============================================================
   TABLES
   ============================================================ */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: var(--surface-primary);
}

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: var(--text-sm);
}

.table thead th {
  position: sticky;
  top: 0;
  background: var(--surface-secondary);
  border-bottom: 1px solid var(--border-primary);
  padding: 10px var(--space-4);
  font-weight: var(--font-semibold);
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  white-space: nowrap;
  z-index: 1;
}

.table thead th:first-child {
  padding-left: var(--space-5);
}
.table thead th:last-child {
  padding-right: var(--space-5);
}

.table tbody td {
  padding: 12px var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
  vertical-align: middle;
}
.table tbody td:first-child {
  padding-left: var(--space-5);
}
.table tbody td:last-child {
  padding-right: var(--space-5);
}

.table tbody tr {
  transition: background var(--transition-fast);
}
.table tbody tr:hover {
  background: var(--color-brand-50);
}
.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr.is-selected {
  background: var(--color-brand-50);
}

/* Sortable header */
.table th.sortable {
  cursor: pointer;
  user-select: none;
}
.table th.sortable:hover {
  color: var(--text-primary);
}
.table th.sortable::after {
  content: '↕';
  margin-left: 4px;
  opacity: 0.3;
  font-size: var(--text-xs);
}
.table th.sortable.asc::after {
  content: '↑';
  opacity: 1;
}
.table th.sortable.desc::after {
  content: '↓';
  opacity: 1;
}

/* Row checkbox */
.table .row-checkbox {
  width: 18px;
  height: 18px;
  accent-color: var(--color-brand-700);
  cursor: pointer;
}

/* Empty state */
.table-empty {
  text-align: center;
  padding: var(--space-12) var(--space-5);
}
.table-empty-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-tertiary);
  border-radius: var(--radius-full);
  color: var(--text-tertiary);
  font-size: var(--text-2xl);
}
.table-empty-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.table-empty-description {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  max-width: 400px;
  margin: 0 auto;
}
.table-empty-actions {
  margin-top: var(--space-4);
  display: flex;
  justify-content: center;
  gap: var(--space-2);
}


/* ============================================================
   FORMS
   ============================================================ */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-label .required {
  color: var(--color-danger);
  margin-left: 2px;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

.form-control {
  display: block;
  width: 100%;
  height: 40px;
  padding: 8px 12px;
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--surface-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-control::placeholder {
  color: var(--text-tertiary);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-brand-700);
  box-shadow: 0 0 0 3px rgba(122, 12, 46, 0.1);
}

.form-control.is-invalid {
  border-color: var(--color-danger);
}
.form-control.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-control.is-valid {
  border-color: var(--color-success);
}

textarea.form-control {
  height: auto;
  min-height: 100px;
  resize: vertical;
}

select.form-control {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 8px center;
  background-repeat: no-repeat;
  background-size: 20px;
  padding-right: 36px;
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.form-error::before {
  content: '⚠';
  font-size: 10px;
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-brand-700);
  cursor: pointer;
}

/* Form Row */
.form-row {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* Form Section */
.form-section {
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--border-subtle);
}
.form-section:last-child {
  border-bottom: none;
}
.form-section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.form-section-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
}


/* ============================================================
   PAGINATION
   ============================================================ */

.pagination-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.pagination {
  display: inline-flex;
  gap: var(--space-1);
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 4px 10px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--surface-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}
.page-link:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
  text-decoration: none;
}
.page-link.active {
  background: var(--color-brand-700);
  color: var(--text-inverse);
  border-color: var(--color-brand-700);
}
.page-link.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.pagination-info {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}


/* ============================================================
   BREADCRUMBS
   ============================================================ */

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: var(--text-sm);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-secondary);
}

.breadcrumb-separator {
  color: var(--text-tertiary);
  font-size: var(--text-xs);
}

.breadcrumb-item a {
  color: var(--text-secondary);
  font-weight: var(--font-medium);
}
.breadcrumb-item a:hover {
  color: var(--color-brand-700);
}

.breadcrumb-item[aria-current="page"] {
  color: var(--text-primary);
  font-weight: var(--font-semibold);
}


/* ============================================================
   SIDEBAR
   ============================================================ */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border-subtle);
  z-index: var(--z-sticky);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-slow);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  height: var(--header-height);
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-bold);
  font-size: var(--text-lg);
  color: var(--text-primary);
  text-decoration: none;
}
.sidebar-logo img {
  height: 28px;
  width: auto;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3) var(--space-3);
}

.sidebar-section-label {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-3) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 8px 12px;
  margin: 2px 0;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}
.sidebar-item:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
  text-decoration: none;
}
.sidebar-item.active {
  background: var(--color-brand-50);
  color: var(--color-brand-700);
  font-weight: var(--font-semibold);
}

.sidebar-item-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--text-base);
}

.sidebar-item-badge {
  margin-left: auto;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--color-brand-100);
  color: var(--color-brand-700);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.sidebar-submenu {
  padding-left: var(--space-3);
  display: none;
}
.sidebar-submenu.is-open {
  display: block;
}
.sidebar-submenu .sidebar-item {
  font-size: var(--text-sm);
  padding: 6px 12px 6px var(--space-3);
}

.sidebar-item.has-submenu .submenu-arrow {
  margin-left: auto;
  font-size: 10px;
  transition: transform var(--transition-fast);
}
.sidebar-item.has-submenu.is-open .submenu-arrow {
  transform: rotate(90deg);
}

.sidebar-footer {
  padding: var(--space-3) var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

/* User menu in sidebar */
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.sidebar-user:hover {
  background: var(--surface-hover);
}

.sidebar-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-brand-100);
  color: var(--color-brand-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}
.sidebar-user-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-role {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}


/* ============================================================
   MAIN CONTENT AREA
   ============================================================ */

.app-main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-main:not(.public-layout) {
  margin-left: var(--sidebar-width);
}

.app-main.public-layout {
  margin-left: 0;
}

.page-content {
  flex: 1;
  /* padding: var(--space-6); */
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.page-header-left {
  flex: 1;
  min-width: 200px;
}

.page-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin: 0 0 var(--space-2) 0;
  letter-spacing: var(--tracking-tight);
}

.page-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0;
  max-width: 60ch;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}


/* ============================================================
   PUBLIC HEADER
   ============================================================ */

.public-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.public-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 var(--space-6);
  height: var(--header-height);
  max-width: var(--page-max-width);
  margin: 0 auto;
}

.public-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.public-nav .nav-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}
.public-nav .nav-link:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
  text-decoration: none;
}
.public-nav .nav-link.active {
  color: var(--color-brand-700);
  background: var(--color-brand-50);
}


/* ============================================================
   GRID SYSTEM
   ============================================================ */

.grid {
  display: grid;
  gap: var(--space-5);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.grid-auto {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.grid-responsive {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-3, .grid-4, .grid-2 {
    grid-template-columns: 1fr;
  }
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.is-open {
    transform: translateX(0);
  }
  .app-main {
    margin-left: 0;
  }
  .page-content {
    padding: var(--space-4);
  }
}


/* ============================================================
   MODAL / DIALOG
   ============================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  animation: fade-in 150ms ease-out;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  background: var(--surface-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modal-in 200ms ease-out;
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
}
.modal-header h2 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.modal-close:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}


/* ============================================================
   TABS
   ============================================================ */

.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--border-primary);
  margin-bottom: var(--space-5);
  overflow-x: auto;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.tab:hover {
  color: var(--text-primary);
}
.tab.active {
  color: var(--color-brand-700);
  border-bottom-color: var(--color-brand-700);
  font-weight: var(--font-semibold);
}


/* ============================================================
   SEARCH BAR
   ============================================================ */

.search-bar {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 100%;
  height: 38px;
  padding: 6px 12px 6px 36px;
  font-size: var(--text-sm);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--surface-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}
.search-input::placeholder {
  color: var(--text-tertiary);
}
.search-input:focus {
  outline: none;
  border-color: var(--color-brand-700);
  box-shadow: 0 0 0 3px rgba(122, 12, 46, 0.08);
}

.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  pointer-events: none;
}


/* ============================================================
   DROPDOWN
   ============================================================ */

.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  padding: var(--space-1);
  background: var(--surface-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--transition-fast);
}

.dropdown.is-open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 12px;
  font-size: var(--text-sm);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.dropdown-item:hover {
  background: var(--surface-hover);
  text-decoration: none;
}
.dropdown-item.danger {
  color: var(--color-danger);
}
.dropdown-item.danger:hover {
  background: var(--color-danger-bg);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-1) 0;
}


/* ============================================================
   TOOLTIP
   ============================================================ */

.tooltip {
  position: absolute;
  padding: 6px 10px;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--text-inverse);
  background: var(--color-neutral-800);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  z-index: var(--z-tooltip);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.tooltip.is-visible {
  opacity: 1;
}


/* ============================================================
   SKELETON LOADING
   ============================================================ */

.skeleton {
  background: linear-gradient(90deg, var(--color-neutral-100) 25%, var(--color-neutral-200) 50%, var(--color-neutral-100) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 14px;
  margin-bottom: var(--space-2);
}
.skeleton-heading {
  height: 24px;
  width: 60%;
  margin-bottom: var(--space-4);
}
.skeleton-card {
  height: 120px;
}
.skeleton-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}


/* ============================================================
   AVATAR
   ============================================================ */

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: var(--font-semibold);
  flex-shrink: 0;
  overflow: hidden;
}
.avatar-sm {
  width: 24px;
  height: 24px;
  font-size: var(--text-xs);
}
.avatar-md {
  width: 32px;
  height: 32px;
  font-size: var(--text-sm);
}
.avatar-lg {
  width: 40px;
  height: 40px;
  font-size: var(--text-base);
}
.avatar-xl {
  width: 48px;
  height: 48px;
  font-size: var(--text-xl);
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}


/* ============================================================
   EMPTY STATE
   ============================================================ */

.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-5);
}
.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-tertiary);
  border-radius: var(--radius-xl);
  color: var(--text-tertiary);
  font-size: var(--text-3xl);
}
.empty-state-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.empty-state-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  max-width: 400px;
  margin: 0 auto var(--space-5);
}
.empty-state-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
}


/* ============================================================
   UTILITIES
   ============================================================ */

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.ml-auto { margin-left: auto; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}


/* ============================================================
   SECTION BADGE (override legacy inline-flex to block-level above title)
   ============================================================ */

.section-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-9);
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--color-brand-50);
  border: 1px solid var(--color-brand-200);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-brand-700);
  margin-bottom: var(--space-2);
  white-space: nowrap;
}

.section-title {
  font-size: clamp(2.2rem, 3.2vw, 2.8rem);
  line-height: 1.15;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  font-weight: var(--font-display);
  margin: 0;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin: 0;
  max-width: 60ch;
  line-height: var(--leading-relaxed);
}

/* LMS variant */
.lms-section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--color-info-bg);
  border: 1px solid #bfdbfe;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-info-text);
  margin-bottom: var(--space-2);
  white-space: nowrap;
}


/* ============================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================ */

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .section-subtitle {
    font-size: var(--text-base);
  }
}