/* ============================================================
   IntelCampus — Admin Panel Design System v2.0
   Premium SaaS Dashboard · Dark + Light Mode
   ============================================================ */

/* ── CSS Variables ── */
:root {
  --ad-font:        system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Sidebar */
  --sb-bg:          #13192e;
  --sb-bg-deep:     #0d1120;
  --sb-width:       256px;
  --sb-collapsed:   72px;
  --sb-text:        #94a3b8;
  --sb-text-active: #ffffff;
  --sb-accent:      #4f46e5;
  --sb-hover:       rgba(255,255,255,0.06);
  --sb-active-bg:   rgba(79,70,229,0.18);

  /* Page */
  --pg-bg:          #f4f6fb;
  --pg-bg-dark:     #0f1117;

  /* Navbar */
  --nb-bg:          #ffffff;
  --nb-border:      #e8ecf4;
  --nb-height:      60px;

  /* Cards */
  --card-bg:        #ffffff;
  --card-border:    #e8ecf4;
  --card-radius:    14px;
  --card-shadow:    0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
  --card-shadow-hover: 0 4px 12px rgba(0,0,0,0.1), 0 16px 40px rgba(0,0,0,0.08);

  /* Brand colors */
  --c-primary:      #4f46e5;
  --c-primary-light:#eef2ff;
  --c-success:      #10b981;
  --c-success-light:#ecfdf5;
  --c-warning:      #f59e0b;
  --c-warning-light:#fffbeb;
  --c-danger:       #ef4444;
  --c-danger-light: #fef2f2;
  --c-info:         #0ea5e9;
  --c-info-light:   #f0f9ff;
  --c-purple:       #8b5cf6;
  --c-purple-light: #f5f3ff;
  --c-cyan:         #06b6d4;
  --c-cyan-light:   #ecfeff;

  /* Text */
  --tx-primary:     #1e293b;
  --tx-secondary:   #64748b;
  --tx-muted:       #94a3b8;
  --tx-border:      #e2e8f0;

  /* Transitions */
  --tr-fast:  0.18s ease;
  --tr-base:  0.25s ease;
  --tr-slow:  0.35s ease;
}

/* Dark Mode */
[data-theme="dark"] {
  --pg-bg:      #0f1117;
  --nb-bg:      #161b2e;
  --nb-border:  rgba(255,255,255,0.07);
  --card-bg:    #1a2035;
  --card-border:rgba(255,255,255,0.07);
  --card-shadow:0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.25);
  --tx-primary: #f1f5f9;
  --tx-secondary:#94a3b8;
  --tx-border:  rgba(255,255,255,0.08);
  --c-primary-light: rgba(79,70,229,0.15);
  --c-success-light: rgba(16,185,129,0.12);
  --c-warning-light: rgba(245,158,11,0.12);
  --c-danger-light:  rgba(239,68,68,0.12);
  --c-info-light:    rgba(14,165,233,0.12);
  --c-purple-light:  rgba(139,92,246,0.12);
}

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

body {
  font-family: var(--ad-font);
  background: var(--pg-bg);
  color: var(--tx-primary);
  font-size: 0.9rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--tr-base), color var(--tr-base);
  margin: 0;
}

a { text-decoration: none; color: inherit; }

/* ── Layout Wrapper ── */
.ad-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ══════════════════════════════════════
   SIDEBAR
══════════════════════════════════════ */
.ad-sidebar {
  width: var(--sb-width);
  height: 100vh;
  background: linear-gradient(180deg, var(--sb-bg) 0%, var(--sb-bg-deep) 100%);
  position: fixed;
  top: 0; left: 0;
  z-index: 1040;
  display: flex;
  flex-direction: column;
  transition: width var(--tr-slow), transform var(--tr-slow);
  overflow: hidden;
}

/* Collapsed sidebar (desktop) */
.ad-sidebar.collapsed {
  width: var(--sb-collapsed);
}
.ad-sidebar.collapsed .sb-label,
.ad-sidebar.collapsed .sb-chevron,
.ad-sidebar.collapsed .sb-section-label,
.ad-sidebar.collapsed .sb-brand-name { opacity: 0; width: 0; overflow: hidden; white-space: nowrap; }
.ad-sidebar.collapsed .sb-brand { justify-content: center; padding: 0; }
.ad-sidebar.collapsed .sb-nav-link { justify-content: center; padding: 12px; }
.ad-sidebar.collapsed .sb-nav-link .sb-icon { margin: 0; }
.ad-sidebar.collapsed .sb-submenu { display: none !important; }

/* Mobile: hidden by default, slide in */
@media (max-width: 991px) {
  .ad-sidebar {
    transform: translateX(-100%);
    width: var(--sb-width) !important;
    box-shadow: 4px 0 24px rgba(0,0,0,0.4);
  }
  .ad-sidebar.show { transform: translateX(0); }
}

/* Brand / Logo */
.sb-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 18px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  text-decoration: none;
  min-height: 64px;
  flex-shrink: 0;
}
.sb-brand img { height: 32px; width: 32px; object-fit: contain; flex-shrink: 0; }
.sb-brand-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
  transition: all var(--tr-base);
  white-space: nowrap;
}
.sb-brand-name span { color: #818cf8; }

/* Nav */
.sb-nav {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 10px;
  list-style: none;
  margin: 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}
.sb-nav::-webkit-scrollbar { width: 4px; }
.sb-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 10px; }

.sb-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
  padding: 12px 10px 6px;
  transition: all var(--tr-base);
  white-space: nowrap;
}

.sb-nav-item { margin-bottom: 2px; }

.sb-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 9px;
  color: var(--sb-text);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--tr-fast);
  cursor: pointer;
  white-space: nowrap;
}
.sb-nav-link:hover {
  background: var(--sb-hover);
  color: var(--sb-text-active);
}
.sb-nav-link.active {
  background: var(--sb-active-bg);
  color: var(--sb-text-active);
  font-weight: 600;
}
.sb-nav-link.active .sb-icon { color: #818cf8; }

.sb-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
  transition: all var(--tr-fast);
}

.sb-label { flex: 1; transition: all var(--tr-base); }

.sb-chevron {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.3);
  transition: transform var(--tr-fast);
  flex-shrink: 0;
}
.sb-nav-link[aria-expanded="true"] .sb-chevron { transform: rotate(180deg); }

/* Submenu */
.sb-submenu {
  list-style: none;
  padding: 4px 0 4px 32px;
  margin: 0;
}
.sb-submenu li { margin-bottom: 1px; }
.sb-submenu a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 7px;
  color: rgba(255,255,255,0.5);
  font-size: 0.845rem;
  font-weight: 400;
  transition: all var(--tr-fast);
}
.sb-submenu a:hover { color: rgba(255,255,255,0.85); background: var(--sb-hover); }
.sb-submenu a.active {
  color: #a5b4fc;
  background: rgba(79,70,229,0.1);
  font-weight: 500;
}
.sb-submenu a::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
  opacity: 0.5;
}
.sb-submenu a.active::before, .sb-submenu a:hover::before { opacity: 1; }

/* Sidebar footer */
.sb-footer {
  padding: 12px 10px;
  border-top: 1px solid rgba(255,255,255,0.07);
  flex-shrink: 0;
}

/* Overlay for mobile */
.sb-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1039;
  backdrop-filter: blur(2px);
}
.sb-overlay.show { display: block; }

/* ══════════════════════════════════════
   MAIN CONTENT
══════════════════════════════════════ */
.ad-main {
  margin-left: var(--sb-width);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  transition: margin-left var(--tr-slow);
  min-height: 100vh;
}
.ad-sidebar.collapsed ~ .ad-main { margin-left: var(--sb-collapsed); }

@media (max-width: 991px) {
  .ad-main { margin-left: 0 !important; }
}

/* ══════════════════════════════════════
   TOPBAR / NAVBAR
══════════════════════════════════════ */
.ad-topbar {
  height: var(--nb-height);
  background: var(--nb-bg);
  border-bottom: 1px solid var(--nb-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 1030;
  transition: background var(--tr-base), border-color var(--tr-base);
}

.ad-topbar-toggle {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--tx-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tx-secondary);
  cursor: pointer;
  transition: all var(--tr-fast);
  flex-shrink: 0;
}
.ad-topbar-toggle:hover { background: var(--tx-border); color: var(--tx-primary); }

.ad-topbar-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--tx-primary);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ad-topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* Dark mode toggle */
.ad-theme-btn {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--tx-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tx-secondary);
  cursor: pointer;
  transition: all var(--tr-fast);
  font-size: 0.9rem;
}
.ad-theme-btn:hover { background: var(--tx-border); color: var(--tx-primary); }

/* User dropdown */
.ad-user-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--tx-border);
  border-radius: 10px;
  padding: 5px 10px 5px 5px;
  cursor: pointer;
  transition: all var(--tr-fast);
  color: var(--tx-primary);
}
.ad-user-btn:hover { background: var(--c-primary-light); border-color: var(--c-primary); }
.ad-user-btn img {
  width: 28px; height: 28px;
  border-radius: 7px;
  object-fit: cover;
}
.ad-user-name {
  font-size: 0.82rem;
  font-weight: 600;
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ad-dropdown-menu {
  border: 1px solid var(--card-border);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  padding: 6px;
  min-width: 220px;
  background: var(--card-bg);
}
.ad-dropdown-menu .dropdown-item {
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.875rem;
  color: var(--tx-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background var(--tr-fast);
}
.ad-dropdown-menu .dropdown-item:hover { background: var(--c-primary-light); color: var(--c-primary); }
.ad-dropdown-menu .dropdown-item.text-danger:hover { background: var(--c-danger-light); }
.ad-dropdown-menu .dropdown-header {
  font-size: 0.78rem;
  color: var(--tx-muted);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 8px 12px 4px;
}
.ad-dropdown-menu hr { border-color: var(--tx-border); margin: 4px 0; }

/* ══════════════════════════════════════
   PAGE CONTENT
══════════════════════════════════════ */
.ad-content {
  flex: 1;
  padding: 24px;
}
@media (max-width: 576px) { .ad-content { padding: 16px; } }

/* ── Breadcrumb ── */
.ad-breadcrumb {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}
.ad-breadcrumb-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--tx-primary);
  margin: 0;
}
.ad-breadcrumb-trail {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--tx-muted);
  list-style: none;
  padding: 0; margin: 0;
}
.ad-breadcrumb-trail a { color: var(--c-primary); font-weight: 500; }
.ad-breadcrumb-trail li + li::before { content: '/'; margin-right: 6px; }

/* ══════════════════════════════════════
   KPI / STAT CARDS
══════════════════════════════════════ */
.ad-stat-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 20px 22px;
  box-shadow: var(--card-shadow);
  transition: all var(--tr-base);
  display: flex;
  align-items: center;
  gap: 16px;
}
.ad-stat-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}
.ad-stat-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.ad-stat-body { flex: 1; min-width: 0; }
.ad-stat-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tx-muted);
  margin-bottom: 4px;
}
.ad-stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--tx-primary);
  line-height: 1;
}
.ad-stat-sub {
  font-size: 0.78rem;
  color: var(--tx-muted);
  margin-top: 4px;
}
.ad-stat-trend {
  font-size: 0.78rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.ad-stat-trend.up   { color: var(--c-success); }
.ad-stat-trend.down { color: var(--c-danger); }

/* Color variants */
.ic-blue   { background: var(--c-primary-light); color: var(--c-primary); }
.ic-green  { background: var(--c-success-light); color: var(--c-success); }
.ic-amber  { background: var(--c-warning-light); color: var(--c-warning); }
.ic-red    { background: var(--c-danger-light);  color: var(--c-danger);  }
.ic-purple { background: var(--c-purple-light);  color: var(--c-purple);  }
.ic-cyan   { background: var(--c-cyan-light);    color: var(--c-cyan);    }

/* ══════════════════════════════════════
   CARDS (generic)
══════════════════════════════════════ */
.ad-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: background var(--tr-base), border-color var(--tr-base);
}
.ad-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--card-border);
}
.ad-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--tx-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.ad-card-title-icon {
  width: 30px; height: 30px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}
.ad-card-body { padding: 20px; }

/* ══════════════════════════════════════
   TABLES
══════════════════════════════════════ */
.ad-table-wrap {
  overflow-x: auto;
  border-radius: 0 0 var(--card-radius) var(--card-radius);
}
.ad-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.ad-table thead th {
  background: var(--pg-bg);
  color: var(--tx-muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 10px 16px;
  border-bottom: 1px solid var(--tx-border);
  white-space: nowrap;
  position: sticky;
  top: 0;
}
[data-theme="dark"] .ad-table thead th { background: #161b2e; }
.ad-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--tx-border);
  color: var(--tx-primary);
  vertical-align: middle;
}
.ad-table tbody tr:last-child td { border-bottom: none; }
.ad-table tbody tr {
  transition: background var(--tr-fast);
}
.ad-table tbody tr:hover { background: var(--c-primary-light); }

/* Avatar in table */
.ad-avatar {
  width: 34px; height: 34px;
  border-radius: 9px;
  object-fit: cover;
  background: var(--c-primary-light);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-primary);
  flex-shrink: 0;
}

/* ══════════════════════════════════════
   BADGES
══════════════════════════════════════ */
.ad-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.ad-badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.badge-success { background: var(--c-success-light); color: var(--c-success); }
.badge-danger  { background: var(--c-danger-light);  color: var(--c-danger);  }
.badge-warning { background: var(--c-warning-light); color: var(--c-warning); }
.badge-info    { background: var(--c-info-light);    color: var(--c-info);    }
.badge-primary { background: var(--c-primary-light); color: var(--c-primary); }
.badge-purple  { background: var(--c-purple-light);  color: var(--c-purple);  }

/* ══════════════════════════════════════
   BUTTONS
══════════════════════════════════════ */
.ad-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--ad-font);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 9px;
  border: none;
  cursor: pointer;
  transition: all var(--tr-fast);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.4;
}
.ad-btn-sm { padding: 5px 12px; font-size: 0.78rem; border-radius: 7px; }
.ad-btn-lg { padding: 11px 24px; font-size: 0.95rem; border-radius: 11px; }

.ad-btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(79,70,229,0.3);
}
.ad-btn-primary:hover {
  background: #4338ca;
  box-shadow: 0 4px 14px rgba(79,70,229,0.45);
  transform: translateY(-1px);
  color: #fff;
}
.ad-btn-success { background: var(--c-success); color: #fff; }
.ad-btn-success:hover { background: #059669; color: #fff; transform: translateY(-1px); }
.ad-btn-danger { background: var(--c-danger); color: #fff; }
.ad-btn-danger:hover { background: #dc2626; color: #fff; transform: translateY(-1px); }
.ad-btn-warning { background: var(--c-warning); color: #fff; }
.ad-btn-warning:hover { background: #d97706; color: #fff; transform: translateY(-1px); }

.ad-btn-outline {
  background: transparent;
  border: 1.5px solid var(--tx-border);
  color: var(--tx-secondary);
}
.ad-btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); background: var(--c-primary-light); }

.ad-btn-ghost {
  background: transparent;
  color: var(--tx-secondary);
  border: none;
}
.ad-btn-ghost:hover { background: var(--c-primary-light); color: var(--c-primary); }

/* Icon-only btn */
.ad-btn-icon {
  width: 34px; height: 34px;
  padding: 0;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

/* ── Table action icon buttons ── */
.ad-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 7px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--tx-secondary);
  transition: all var(--tr-fast);
  text-decoration: none;
  padding: 0;
}
.ad-action-btn:hover        { background: var(--c-primary-light); color: var(--c-primary); }
.ad-action-btn.edit:hover   { background: var(--c-info-light);    color: var(--c-info); }
.ad-action-btn.view:hover   { background: var(--c-success-light); color: var(--c-success); }
.ad-action-btn.danger:hover { background: var(--c-danger-light);  color: var(--c-danger); }
.ad-action-btn.warn:hover   { background: var(--c-warning-light); color: var(--c-warning); }

/* ── Table search bar ── */
.ad-table-search {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--pg-bg);
  border: 1.5px solid var(--tx-border);
  border-radius: 9px;
  padding: 5px 12px;
  transition: border-color var(--tr-fast);
}
.ad-table-search:focus-within { border-color: var(--c-primary); }
.ad-table-search i { color: var(--tx-muted); font-size: 0.8rem; }
.ad-table-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.85rem;
  color: var(--tx-primary);
  width: 180px;
}
.ad-table-search input::placeholder { color: var(--tx-muted); }

/* ── Empty state ── */
.ad-empty-row td {
  padding: 48px 20px !important;
  text-align: center;
  color: var(--tx-muted);
  font-size: 0.875rem;
}
.ad-empty-row .ad-empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: 0.3;
  display: block;
}

/* ══════════════════════════════════════
   FORMS
══════════════════════════════════════ */
.ad-form-group { margin-bottom: 20px; }
.ad-form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--tx-secondary);
  margin-bottom: 6px;
}
.ad-form-control {
  width: 100%;
  background: var(--pg-bg);
  border: 1.5px solid var(--tx-border);
  border-radius: 9px;
  padding: 9px 13px;
  font-size: 0.875rem;
  color: var(--tx-primary);
  font-family: var(--ad-font);
  transition: border-color var(--tr-fast), box-shadow var(--tr-fast), background var(--tr-fast);
  outline: none;
}
.ad-form-control:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
  background: var(--card-bg);
}
.ad-form-control::placeholder { color: var(--tx-muted); }
[data-theme="dark"] .ad-form-control { background: rgba(255,255,255,0.04); }
[data-theme="dark"] .ad-form-control:focus { background: rgba(255,255,255,0.07); }

/* Bootstrap overrides for forms inside admin */
.form-control, .form-select {
  background: var(--pg-bg);
  border: 1.5px solid var(--tx-border);
  border-radius: 9px;
  color: var(--tx-primary);
  font-size: 0.875rem;
  padding: 9px 13px;
  transition: border-color var(--tr-fast), box-shadow var(--tr-fast);
}
.form-control:focus, .form-select:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
  background: var(--card-bg);
  color: var(--tx-primary);
}
.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--tx-secondary);
  margin-bottom: 6px;
}
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background: rgba(255,255,255,0.04);
  color: var(--tx-primary);
  border-color: rgba(255,255,255,0.1);
}
[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
  background: rgba(255,255,255,0.07);
  border-color: var(--c-primary);
  color: var(--tx-primary);
}
[data-theme="dark"] .form-select option { background: #1a2035; }

/* ══════════════════════════════════════
   ALERTS
══════════════════════════════════════ */
.ad-alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 0.875rem;
  margin-bottom: 16px;
  border: 1px solid transparent;
}
.ad-alert-icon { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }
.ad-alert-success { background: var(--c-success-light); color: var(--c-success); border-color: rgba(16,185,129,0.2); }
.ad-alert-danger  { background: var(--c-danger-light);  color: var(--c-danger);  border-color: rgba(239,68,68,0.2); }
.ad-alert-warning { background: var(--c-warning-light); color: var(--c-warning); border-color: rgba(245,158,11,0.2); }
.ad-alert-info    { background: var(--c-info-light);    color: var(--c-info);    border-color: rgba(14,165,233,0.2); }

/* ══════════════════════════════════════
   EMPTY STATE
══════════════════════════════════════ */
.ad-empty {
  text-align: center;
  padding: 60px 24px;
}
.ad-empty-icon {
  width: 72px; height: 72px;
  border-radius: 20px;
  background: var(--c-primary-light);
  color: var(--c-primary);
  font-size: 1.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.ad-empty h5 { font-size: 1rem; font-weight: 700; color: var(--tx-primary); margin-bottom: 8px; }
.ad-empty p  { font-size: 0.875rem; color: var(--tx-muted); max-width: 300px; margin: 0 auto 20px; }

/* ══════════════════════════════════════
   SKELETON LOADERS
══════════════════════════════════════ */
.ad-skeleton {
  background: linear-gradient(90deg, var(--tx-border) 25%, rgba(255,255,255,0.1) 50%, var(--tx-border) 75%);
  background-size: 200% 100%;
  animation: ad-shimmer 1.4s infinite;
  border-radius: 6px;
}
@keyframes ad-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.ad-skeleton-text  { height: 14px; margin-bottom: 8px; }
.ad-skeleton-title { height: 20px; margin-bottom: 12px; width: 60%; }
.ad-skeleton-card  { height: 100px; border-radius: var(--card-radius); }

/* ══════════════════════════════════════
   PAGINATION
══════════════════════════════════════ */
.ad-pagination {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
.ad-pagination .page-link {
  width: 34px; height: 34px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--tx-secondary);
  background: var(--card-bg);
  border: 1px solid var(--tx-border);
  transition: all var(--tr-fast);
  text-decoration: none;
}
.ad-pagination .page-link:hover { background: var(--c-primary-light); color: var(--c-primary); border-color: var(--c-primary); }
.ad-pagination .page-item.active .page-link { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.ad-pagination .page-item.disabled .page-link { opacity: 0.4; pointer-events: none; }

/* ══════════════════════════════════════
   TOASTS
══════════════════════════════════════ */
.ad-toast {
  background: var(--card-bg) !important;
  border: 1px solid var(--card-border) !important;
  border-radius: 12px !important;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15) !important;
  color: var(--tx-primary) !important;
  min-width: 280px;
}
.ad-toast .toast-body { padding: 14px 16px; font-size: 0.875rem; font-weight: 500; }

/* ══════════════════════════════════════
   FOOTER
══════════════════════════════════════ */
.ad-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--card-border);
  background: var(--card-bg);
  font-size: 0.78rem;
  color: var(--tx-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

/* ══════════════════════════════════════
   UTILITIES
══════════════════════════════════════ */
.text-primary-custom { color: var(--c-primary) !important; }
.text-muted-custom   { color: var(--tx-muted) !important; }
.bg-page             { background: var(--pg-bg) !important; }

/* Bootstrap overrides */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: background var(--tr-base), border-color var(--tr-base);
}
.card-header {
  background: transparent;
  border-bottom: 1px solid var(--card-border);
  padding: 16px 20px;
  font-weight: 700;
  color: var(--tx-primary);
}
.card-body { padding: 20px; }
.table { color: var(--tx-primary); }
.table > :not(caption) > * > * { background: transparent; color: var(--tx-primary); border-color: var(--tx-border); }
.breadcrumb { background: transparent; padding: 0; margin: 0; }
.breadcrumb-item a { color: var(--c-primary); }
.breadcrumb-item.active { color: var(--tx-muted); }
.modal-content { background: var(--card-bg); border-color: var(--card-border); border-radius: 16px; }
.modal-header { border-color: var(--tx-border); }
.modal-footer { border-color: var(--tx-border); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--tx-border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--tx-muted); }

/* Focus ring */
:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 2px; }

/* DataTables overrides */
.dataTables_wrapper .dataTables_filter input {
  background: var(--pg-bg);
  border: 1.5px solid var(--tx-border);
  border-radius: 8px;
  padding: 6px 12px;
  color: var(--tx-primary);
  font-size: 0.85rem;
  margin-left: 8px;
}
.dataTables_wrapper .dataTables_length select {
  background: var(--pg-bg);
  border: 1.5px solid var(--tx-border);
  border-radius: 8px;
  padding: 4px 8px;
  color: var(--tx-primary);
  margin: 0 4px;
}
.dataTables_wrapper .dataTables_info { font-size: 0.82rem; color: var(--tx-muted); }
.dataTables_paginate .paginate_button {
  border-radius: 8px !important;
  font-size: 0.82rem !important;
  padding: 4px 10px !important;
  color: var(--tx-secondary) !important;
}
.dataTables_paginate .paginate_button.current {
  background: var(--c-primary) !important;
  color: #fff !important;
  border-color: var(--c-primary) !important;
}

/* ══════════════════════════════════════
   FORM VALIDATION
══════════════════════════════════════ */
.form-control.is-invalid, .form-select.is-invalid {
  border-color: var(--c-danger) !important;
  box-shadow: none;
}
.form-control.is-invalid:focus, .form-select.is-invalid:focus {
  border-color: var(--c-danger) !important;
  box-shadow: 0 0 0 3px rgba(239,68,68,0.12) !important;
}
.invalid-feedback {
  font-size: 0.775rem;
  color: var(--c-danger);
  margin-top: 5px;
  display: none;
}
.is-invalid ~ .invalid-feedback,
.was-validated :invalid ~ .invalid-feedback {
  display: block;
}

/* ══════════════════════════════════════
   FORM CHECKBOXES & RADIOS
══════════════════════════════════════ */
.form-check-input {
  width: 16px; height: 16px;
  border: 1.5px solid var(--tx-border);
  background-color: var(--pg-bg);
  cursor: pointer;
  flex-shrink: 0;
}
.form-check-input:checked {
  background-color: var(--c-primary);
  border-color: var(--c-primary);
}
.form-check-input:focus { box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
.form-check-label {
  font-size: 0.875rem;
  color: var(--tx-secondary);
  cursor: pointer;
}

/* ══════════════════════════════════════
   IMAGE THUMBNAIL
══════════════════════════════════════ */
.img-thumbnail {
  border-radius: 10px;
  border: 1.5px solid var(--tx-border);
  padding: 4px;
  background: var(--card-bg);
}

/* ══════════════════════════════════════
   ALERT OVERRIDES
══════════════════════════════════════ */
.alert { border-radius: 10px; font-size: 0.875rem; }
.alert-info    { background: var(--c-info-light);    border-color: rgba(14,165,233,0.2);  color: var(--c-info); }
.alert-success { background: var(--c-success-light); border-color: rgba(16,185,129,0.2);  color: var(--c-success); }
.alert-danger  { background: var(--c-danger-light);  border-color: rgba(239,68,68,0.2);   color: var(--c-danger); }
.alert-warning { background: var(--c-warning-light); border-color: rgba(245,158,11,0.2);  color: var(--c-warning); }
[data-theme="dark"] .alert-info    { background: rgba(14,165,233,0.08);  color: var(--c-info); }
[data-theme="dark"] .alert-success { background: rgba(16,185,129,0.08);  color: var(--c-success); }
[data-theme="dark"] .alert-danger  { background: rgba(239,68,68,0.08);   color: var(--c-danger); }
[data-theme="dark"] .alert-warning { background: rgba(245,158,11,0.08);  color: var(--c-warning); }

/* ══════════════════════════════════════
   FORM SECTION DIVIDER
══════════════════════════════════════ */
.ad-form-section {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--c-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 6px 0 10px;
  margin: 8px 0 20px;
  border-bottom: 2px solid var(--c-primary-light);
}

/* ══════════════════════════════════════
   QUESTION CARDS (Exam builder)
══════════════════════════════════════ */
.ad-question-card {
  background: var(--pg-bg);
  border: 1.5px solid var(--tx-border);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: border-color var(--tr-fast), background var(--tr-fast);
}
.ad-question-card:hover { border-color: var(--c-primary); background: var(--c-primary-light); }
.ad-marks-badge {
  background: var(--c-primary);
  color: #fff;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}
.ad-remove-btn {
  color: var(--c-danger);
  cursor: pointer;
  font-size: 0.78rem;
  margin-left: 6px;
  background: none;
  border: none;
  padding: 0;
}
.ad-remove-btn:hover { text-decoration: underline; }

/* ══════════════════════════════════════
   ATTENDANCE ROWS
══════════════════════════════════════ */
.attendance-row {
  background: var(--card-bg);
  border: 1.5px solid var(--tx-border) !important;
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 8px;
  transition: background var(--tr-fast);
}
.attendance-row:hover { border-color: var(--c-primary) !important; }