/* =========================================================
   BLASTEXAMS — 100-LEVEL ACADEMIC VAULT & CBT CSS
   Ultra-Premium Design System & Responsive Layout Tokens
   ========================================================= */

/* --- Vault Hero Banner --- */
.vault-header-hero {
  background: linear-gradient(135deg, rgba(26, 24, 38, 0.95) 0%, rgba(15, 13, 21, 0.98) 100%);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-slab, clamp(20px, 2.2vw, 32px));
  padding: clamp(1.5rem, 2.2vw, 2.4rem);
  margin-bottom: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  position: relative;
  overflow: hidden;
}
.vault-header-hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.vault-stats-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.85rem;
  margin-top: 1.25rem;
}
.vault-stat-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 0.85rem 1rem;
  text-align: center;
  transition: all 0.25s var(--ease, cubic-bezier(0.2, 0.7, 0.1, 1));
}
.vault-stat-box:hover {
  background: rgba(139, 92, 246, 0.08);
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateY(-2px);
}
.vault-stat-val {
  font-family: 'Outfit', sans-serif;
  font-size: 1.45rem;
  font-weight: 800;
  color: #FFFFFF;
  font-variant-numeric: tabular-nums;
}
.vault-stat-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.2rem;
}

/* --- Filter & Search Toolbar --- */
.vault-chip-section {
  margin-bottom: 0.85rem;
}
.vault-chip-label {
  font-size: 0.76rem;
  font-weight: 800;
  color: #64748B;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.vault-chip-strip {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.45rem;
  margin-bottom: 0.85rem;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.vault-category-chip,
.vault-quick-chip {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: #334155;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.42rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.vault-category-chip:hover,
.vault-quick-chip:hover {
  border-color: #8B5CF6;
  color: #8B5CF6;
  background: rgba(139, 92, 246, 0.05);
  transform: translateY(-1px);
}
.vault-category-chip.active,
.vault-quick-chip.active {
  background: #8B5CF6;
  color: #FFFFFF;
  border-color: #8B5CF6;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25);
}

.vault-toolbar {
  background: #FFFFFF;
  border: 1px solid var(--ps-border-light, #E2E8F0);
  border-radius: var(--radius-lg, 16px);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}
.vault-search-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.vault-search-wrapper {
  position: relative;
  flex: 1;
  min-width: 250px;
  display: flex;
  align-items: center;
}
.vault-search-icon {
  position: absolute;
  left: 14px;
  color: #94A3B8;
  pointer-events: none;
}
.vault-search-input {
  width: 100%;
  background: #F8FAFC;
  border: 1px solid #CBD5E1;
  border-radius: 10px;
  padding: 0.75rem 2.4rem 0.75rem 2.6rem;
  font-size: 0.95rem;
  color: var(--ps-text-dark, #0F172A);
  outline: none;
  transition: all 0.2s ease;
}
.vault-search-input:focus {
  border-color: var(--ps-purple-primary, #8B5CF6);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}
.vault-search-clear-btn {
  position: absolute;
  right: 12px;
  background: rgba(148, 163, 184, 0.2);
  border: none;
  color: #64748B;
  font-size: 0.8rem;
  font-weight: 800;
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s ease;
}
.vault-search-clear-btn:hover {
  background: #EF4444;
  color: #FFFFFF;
}
.vault-dropdown-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.75rem;
}
.vault-select {
  width: 100%;
  background: #F8FAFC;
  border: 1px solid #CBD5E1;
  border-radius: 8px;
  padding: 0.6rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ps-text-dark, #0F172A);
  outline: none;
  cursor: pointer;
}
.vault-select:focus {
  border-color: var(--ps-purple-primary, #8B5CF6);
}

/* --- Active Filters Indicator Bar --- */
.vault-active-filters-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  padding: 0.65rem 1rem;
  background: rgba(139, 92, 246, 0.04);
  border: 1px dashed rgba(139, 92, 246, 0.35);
  border-radius: 12px;
}
.vault-filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: #0F172A;
  font-weight: 700;
  font-size: 0.78rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.vault-clear-all-btn {
  margin-left: auto;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #DC2626;
  font-size: 0.76rem;
  font-weight: 800;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.18s ease;
}
.vault-clear-all-btn:hover {
  background: #DC2626;
  color: #FFFFFF;
}

/* --- Results Header & View Switcher --- */
.vault-results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.vault-controls-group {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}
.vault-limit-select {
  background: #F8FAFC;
  border: 1px solid #CBD5E1;
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: #475569;
  outline: none;
  cursor: pointer;
}
.vault-view-toggle {
  display: inline-flex;
  background: #F1F5F9;
  border-radius: 8px;
  padding: 2px;
  border: 1px solid #E2E8F0;
}
.vault-view-btn {
  border: none;
  background: transparent;
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: #64748B;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.18s ease;
}
.vault-view-btn.active {
  background: #FFFFFF;
  color: #7C3AED;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  font-weight: 800;
}

/* --- Material Vault Grid --- */
.vault-materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.35rem;
  margin-bottom: 2rem;
}
.vault-card {
  background: #FFFFFF;
  border: 1px solid var(--ps-border-light, #E2E8F0);
  border-radius: var(--radius-md, 12px);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}
.vault-card:hover {
  transform: translateY(-3px);
  border-color: var(--ps-purple-light, #A855F7);
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.1);
}
.vault-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.vault-course-chip {
  background: rgba(139, 92, 246, 0.1);
  color: var(--ps-purple-primary, #8B5CF6);
  font-weight: 800;
  font-size: 0.78rem;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  letter-spacing: 0.5px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.vault-course-chip.interactive {
  cursor: pointer;
  transition: all 0.18s ease;
}
.vault-course-chip.interactive:hover {
  background: var(--ps-purple-primary, #8B5CF6);
  color: #FFFFFF;
  border-color: var(--ps-purple-primary, #8B5CF6);
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(139, 92, 246, 0.3);
}
.vault-format-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
  background: #F1F5F9;
  color: #475569;
}
.vault-format-badge.pdf { background: rgba(239, 68, 68, 0.1); color: #DC2626; }
.vault-format-badge.docx { background: rgba(37, 99, 235, 0.1); color: #2563EB; }
.vault-format-badge.pptx { background: rgba(245, 158, 11, 0.1); color: #D97706; }

.vault-card-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ps-text-dark, #0F172A);
  margin-bottom: 0.4rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.vault-card-desc {
  font-size: 0.84rem;
  color: var(--ps-text-gray, #475569);
  line-height: 1.45;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.vault-card-meta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.75rem;
  color: #64748B;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid #F1F5F9;
  flex-wrap: wrap;
}
.vault-card-actions {
  display: flex;
  gap: 0.5rem;
}
.vault-btn-view {
  flex: 1;
  background: var(--ps-purple-soft, rgba(139, 92, 246, 0.08));
  color: var(--ps-purple-primary, #8B5CF6);
  border: 1px solid var(--ps-purple-soft-border, rgba(139, 92, 246, 0.2));
  padding: 0.55rem 0.85rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
}
.vault-btn-view:hover {
  background: var(--ps-purple-primary, #8B5CF6);
  color: #FFFFFF;
}
.vault-btn-download {
  background: #F1F5F9;
  color: #334155;
  border: 1px solid #CBD5E1;
  padding: 0.55rem 0.85rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
}
.vault-btn-download:hover {
  background: #E2E8F0;
  color: #0F172A;
}

/* --- Material Vault Compact List View --- */
.vault-materials-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 2rem;
}
.vault-list-row {
  background: #FFFFFF;
  border: 1px solid var(--ps-border-light, #E2E8F0);
  border-radius: var(--radius-md, 12px);
  padding: 0.85rem 1.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: all 0.18s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}
.vault-list-row:hover {
  border-color: var(--ps-purple-light, #A855F7);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(139, 92, 246, 0.08);
}
.vault-list-main {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex: 1;
  min-width: 0;
}
.vault-list-title-wrap {
  min-width: 0;
  flex: 1;
}
.vault-list-title {
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--ps-text-dark, #0F172A);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.vault-list-sub {
  font-size: 0.75rem;
  color: #64748B;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.2rem;
}
.vault-list-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* --- Pagination Controls --- */
.vault-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin: 2rem 0;
}
.vault-page-btn {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: var(--ps-text-dark, #0F172A);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.18s ease;
}
.vault-page-btn:hover:not(:disabled) {
  border-color: var(--ps-purple-primary, #8B5CF6);
  color: var(--ps-purple-primary, #8B5CF6);
}
.vault-page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.vault-page-number-btn {
  min-width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: #334155;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.18s ease;
}
.vault-page-number-btn:hover {
  border-color: #8B5CF6;
  color: #8B5CF6;
  background: rgba(139, 92, 246, 0.05);
}
.vault-page-number-btn.active {
  background: #8B5CF6;
  color: #FFFFFF;
  border-color: #8B5CF6;
  box-shadow: 0 3px 10px rgba(139, 92, 246, 0.25);
}
.vault-page-ellipsis {
  padding: 0 0.35rem;
  color: #94A3B8;
  font-weight: 800;
  font-size: 0.95rem;
}

/* --- Course Directory & Detail View --- */
.courses-grid-100l {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.35rem;
  margin-bottom: 2.5rem;
}
.course-card-100l {
  background: #FFFFFF;
  border: 1px solid var(--ps-border-light, #E2E8F0);
  border-radius: var(--radius-md, 12px);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: all 0.22s ease;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
}
.course-card-100l:hover {
  transform: translateY(-3px);
  border-color: var(--ps-purple-primary, #8B5CF6);
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.12);
}
.course-stats-badges {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}
.course-stat-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.course-stat-badge.materials { background: rgba(37, 99, 235, 0.08); color: #2563EB; }
.course-stat-badge.questions { background: rgba(16, 185, 129, 0.08); color: #059669; }
.course-stat-badge.flashcards { background: rgba(139, 92, 246, 0.08); color: #7C3AED; }

/* =========================================================
   CBT EXAM ENVIRONMENT (LIGHT MODE BY DEFAULT + DARK TOGGLE)
   ========================================================= */

.cbt-hall-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  overflow-y: auto;
  padding: 1.5rem;
  transition: background-color 0.22s ease, color 0.22s ease;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.cbt-hall-content-wrap {
  max-width: 1100px;
  margin: 0 auto;
}

.cbt-body-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 1.75rem;
}
@media (max-width: 900px) {
  .cbt-body-layout {
    grid-template-columns: 1fr;
  }
}

.cbt-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.cbt-palette-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  max-height: 380px;
  overflow-y: auto;
  padding-right: 0.35rem;
}

.cbt-palette-btn {
  border-radius: 8px;
  font-weight: 800;
  font-size: 0.88rem;
  padding: 0.65rem 0;
  cursor: pointer;
  transition: all 0.15s ease;
}

.cbt-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

/* --- LIGHT THEME (Default) --- */
.cbt-hall-overlay.light {
  background: #F8FAFC;
  color: #0F172A;
}

.cbt-hall-overlay.light .cbt-header-bar {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 14px;
  padding: 1.25rem 1.75rem;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}

.cbt-hall-overlay.light .cbt-course-chip {
  background: #EDE9FE;
  color: #6D28D9;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 0.35rem 0.8rem;
  border-radius: 6px;
  margin-right: 0.5rem;
  border: 1px solid #DDD6FE;
}

.cbt-hall-overlay.light .cbt-course-title {
  color: #0F172A;
  font-size: 1.15rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
}

.cbt-hall-overlay.light .cbt-course-sub {
  color: #64748B;
  font-size: 0.82rem;
  margin-top: 0.25rem;
}

.cbt-hall-overlay.light .cbt-theme-toggle {
  background: #F1F5F9;
  border: 1px solid #CBD5E1;
  color: #334155;
  border-radius: 8px;
  padding: 0.6rem 1rem;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.18s ease;
}
.cbt-hall-overlay.light .cbt-theme-toggle:hover {
  background: #E2E8F0;
  color: #0F172A;
}

.cbt-hall-overlay.light .cbt-timer-badge {
  background: #F5F3FF;
  border: 1.5px solid #DDD6FE;
  color: #6D28D9;
  padding: 0.55rem 1.25rem;
  border-radius: 999px;
  font-family: 'Outfit', monospace;
  font-size: 1.2rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.cbt-hall-overlay.light .cbt-timer-badge.warning {
  background: #FEF3C7;
  border-color: #F59E0B;
  color: #B45309;
  animation: pulse 1s infinite;
}
.cbt-hall-overlay.light .cbt-timer-badge.critical {
  background: #FEE2E2;
  border-color: #EF4444;
  color: #B91C1C;
  animation: pulse 0.5s infinite;
}

.cbt-hall-overlay.light .cbt-submit-btn {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: #FFFFFF;
  border: none;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  font-weight: 800;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
  transition: all 0.18s ease;
}
.cbt-hall-overlay.light .cbt-submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
}

.cbt-hall-overlay.light .cbt-exit-btn {
  background: #FEF2F2;
  border: 1px solid #FCA5A5;
  color: #DC2626;
  padding: 0.65rem 1rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.18s ease;
}
.cbt-hall-overlay.light .cbt-exit-btn:hover {
  background: #FEE2E2;
}

.cbt-hall-overlay.light .cbt-question-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}

.cbt-hall-overlay.light .cbt-q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid #F1F5F9;
  padding-bottom: 0.85rem;
}

.cbt-hall-overlay.light .cbt-q-number {
  font-weight: 800;
  color: #6D28D9;
  font-size: 1.05rem;
}

.cbt-hall-overlay.light .cbt-q-topic {
  font-size: 0.82rem;
  color: #64748B;
  font-weight: 600;
}

.cbt-hall-overlay.light .cbt-year-chip {
  background: #EDE9FE;
  color: #6D28D9;
  font-weight: 700;
  font-size: 0.78rem;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  border: 1px solid #DDD6FE;
}

.cbt-hall-overlay.light .cbt-passage-box {
  background: #F8FAFC;
  border-left: 3.5px solid #7C3AED;
  border-top: 1px solid #E2E8F0;
  border-right: 1px solid #E2E8F0;
  border-bottom: 1px solid #E2E8F0;
  padding: 1.15rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: #334155;
}

.cbt-hall-overlay.light .cbt-question-text {
  font-size: 1.22rem;
  line-height: 1.6;
  font-weight: 700;
  color: #0F172A;
  margin-bottom: 1.75rem;
}

.cbt-hall-overlay.light .cbt-option-btn {
  background: #FFFFFF;
  border: 1.5px solid #E2E8F0;
  border-radius: 12px;
  padding: 1.05rem 1.25rem;
  color: #1E293B;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.18s ease;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.02);
}
.cbt-hall-overlay.light .cbt-option-btn:hover {
  background: #F5F3FF;
  border-color: #C4B5FD;
  color: #6D28D9;
  transform: translateX(3px);
}
.cbt-hall-overlay.light .cbt-option-btn.selected {
  background: #F5F3FF;
  border: 2px solid #7C3AED;
  color: #5B21B6;
  font-weight: 700;
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.12), 0 4px 12px rgba(124, 58, 237, 0.08);
}

.cbt-hall-overlay.light .cbt-option-badge {
  display: inline-flex;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #F1F5F9;
  border: 1px solid #CBD5E1;
  color: #475569;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.cbt-hall-overlay.light .cbt-option-btn.selected .cbt-option-badge {
  background: #7C3AED;
  color: #FFFFFF;
  border-color: #7C3AED;
}

.cbt-hall-overlay.light .cbt-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.75rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.cbt-hall-overlay.light .cbt-nav-btn {
  background: #FFFFFF;
  border: 1.5px solid #CBD5E1;
  color: #0F172A;
  border-radius: 10px;
  padding: 0.75rem 1.35rem;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.18s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.cbt-hall-overlay.light .cbt-nav-btn:hover:not(:disabled) {
  background: #F8FAFC;
  border-color: #94A3B8;
  transform: translateY(-1px);
}
.cbt-hall-overlay.light .cbt-nav-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.cbt-hall-overlay.light .cbt-flag-btn {
  background: #FFFFFF;
  border: 1.5px solid #CBD5E1;
  color: #475569;
  border-radius: 10px;
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.18s ease;
}
.cbt-hall-overlay.light .cbt-flag-btn.flagged {
  background: #FEF3C7;
  border-color: #F59E0B;
  color: #92400E;
}

.cbt-hall-overlay.light .cbt-sidebar-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}
.cbt-hall-overlay.light .cbt-sidebar-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 800;
  color: #0F172A;
  margin: 0 0 1rem 0;
}
.cbt-hall-overlay.light .cbt-palette-btn {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  color: #475569;
}
.cbt-hall-overlay.light .cbt-palette-btn:hover {
  background: #EDE9FE;
  border-color: #C4B5FD;
  color: #6D28D9;
}
.cbt-hall-overlay.light .cbt-palette-btn.active {
  outline: 2.5px solid #7C3AED;
  outline-offset: 2px;
}
.cbt-hall-overlay.light .cbt-palette-btn.answered {
  background: #7C3AED;
  color: #FFFFFF;
  border-color: #7C3AED;
  box-shadow: 0 2px 6px rgba(124, 58, 237, 0.25);
}
.cbt-hall-overlay.light .cbt-palette-btn.flagged {
  border-color: #F59E0B;
  color: #92400E;
  background: #FEF3C7;
}

/* Results Review Light Mode */
.cbt-hall-overlay.light .cbt-result-hero {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 16px;
  padding: 2.25rem 2rem;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.05);
}
.cbt-hall-overlay.light .cbt-result-title {
  color: #0F172A;
}
.cbt-hall-overlay.light .cbt-result-score-val {
  color: #6D28D9;
}
.cbt-hall-overlay.light .cbt-review-card {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 14px;
  padding: 1.75rem;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}
.cbt-hall-overlay.light .cbt-review-q-num {
  font-weight: 800;
  font-size: 1rem;
  color: #6D28D9;
}
.cbt-hall-overlay.light .cbt-review-q-text {
  font-size: 1.1rem;
  line-height: 1.6;
  color: #0F172A;
  font-weight: 700;
  margin: 0.85rem 0 1.25rem 0;
}
.cbt-hall-overlay.light .cbt-review-opt-item {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  color: #1E293B;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}
.cbt-hall-overlay.light .cbt-review-opt-item.correct {
  background: #ECFDF5;
  border: 1.5px solid #10B981;
  color: #065F46;
  font-weight: 600;
}
.cbt-hall-overlay.light .cbt-review-opt-item.wrong-choice {
  background: #FEF2F2;
  border: 1.5px solid #EF4444;
  color: #991B1B;
  font-weight: 600;
}
.cbt-hall-overlay.light .cbt-explanation-box {
  background: #F5F3FF;
  border-left: 3.5px solid #7C3AED;
  border-top: 1px solid #E2E8F0;
  border-right: 1px solid #E2E8F0;
  border-bottom: 1px solid #E2E8F0;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  font-size: 0.92rem;
  line-height: 1.55;
  color: #1E293B;
}

/* Stats Matrix in Results */
.cbt-hall-overlay .vault-stats-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}
.cbt-hall-overlay.light .vault-stat-box {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 12px;
  padding: 1.25rem 1rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.03);
}
.cbt-hall-overlay.light .vault-stat-val {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: #0F172A;
}
.cbt-hall-overlay.light .vault-stat-label {
  font-size: 0.82rem;
  color: #64748B;
  font-weight: 600;
  margin-top: 0.35rem;
}

.cbt-hall-overlay.dark .vault-stat-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 1.25rem 1rem;
  text-align: center;
}
.cbt-hall-overlay.dark .vault-stat-val {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: #FFFFFF;
}
.cbt-hall-overlay.dark .vault-stat-label {
  font-size: 0.82rem;
  color: #94A3B8;
  font-weight: 600;
  margin-top: 0.35rem;
}

.cbt-hall-overlay.dark .cbt-result-hero {
  background: #161420;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 2.25rem 2rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}
.cbt-hall-overlay.dark .cbt-result-title {
  color: #FFFFFF;
}
.cbt-hall-overlay.dark .cbt-review-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 1.75rem;
}
.cbt-hall-overlay.dark .cbt-review-q-num {
  font-weight: 800;
  font-size: 1rem;
  color: #DDD6FE;
}
.cbt-hall-overlay.dark .cbt-review-q-text {
  font-size: 1.1rem;
  line-height: 1.6;
  color: #FFFFFF;
  font-weight: 600;
  margin: 0.85rem 0 1.25rem 0;
}
.cbt-hall-overlay.dark .cbt-review-opt-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: #E2E8F0;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}
.cbt-hall-overlay.dark .cbt-review-opt-item.correct {
  background: rgba(16, 185, 129, 0.15);
  border: 1.5px solid #10B981;
  color: #A7F3D0;
  font-weight: 600;
}
.cbt-hall-overlay.dark .cbt-review-opt-item.wrong-choice {
  background: rgba(239, 68, 68, 0.15);
  border: 1.5px solid #EF4444;
  color: #FECACA;
  font-weight: 600;
}
.cbt-hall-overlay.dark .cbt-explanation-box {
  background: rgba(139, 92, 246, 0.08);
  border-left: 3.5px solid #8B5CF6;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  font-size: 0.92rem;
  line-height: 1.55;
  color: #E2E8F0;
}

/* --- DARK THEME OVERRIDES --- */
.cbt-hall-overlay.dark {
  background: #0B0914;
  color: #F8FAFC;
}
.cbt-hall-overlay.dark .cbt-header-bar {
  background: #141122;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 1.25rem 1.75rem;
}
.cbt-hall-overlay.dark .cbt-course-chip {
  background: rgba(139, 92, 246, 0.2);
  color: #DDD6FE;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 0.35rem 0.8rem;
  border-radius: 6px;
  margin-right: 0.5rem;
}
.cbt-hall-overlay.dark .cbt-course-title {
  color: #FFFFFF;
  font-size: 1.15rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
}
.cbt-hall-overlay.dark .cbt-course-sub {
  color: #94A3B8;
  font-size: 0.82rem;
  margin-top: 0.25rem;
}
.cbt-hall-overlay.dark .cbt-theme-toggle {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #CBD5E1;
  border-radius: 8px;
  padding: 0.6rem 1rem;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.cbt-hall-overlay.dark .cbt-timer-badge {
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.4);
  color: #DDD6FE;
  padding: 0.55rem 1.25rem;
  border-radius: 999px;
  font-family: 'Outfit', monospace;
  font-size: 1.2rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.cbt-hall-overlay.dark .cbt-timer-badge.warning {
  background: rgba(245, 158, 11, 0.2);
  border-color: #F59E0B;
  color: #FDE68A;
  animation: pulse 1s infinite;
}
.cbt-hall-overlay.dark .cbt-timer-badge.critical {
  background: rgba(239, 68, 68, 0.25);
  border-color: #EF4444;
  color: #FECACA;
  animation: pulse 0.5s infinite;
}
.cbt-hall-overlay.dark .cbt-submit-btn {
  background: var(--grad-status-emerald, #10B981);
  color: #FFFFFF;
  border: none;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
}
.cbt-hall-overlay.dark .cbt-exit-btn {
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #F87171;
  background: rgba(239, 68, 68, 0.12);
  padding: 0.65rem 1rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
}
.cbt-hall-overlay.dark .cbt-question-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 2rem;
}
.cbt-hall-overlay.dark .cbt-q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 0.85rem;
}
.cbt-hall-overlay.dark .cbt-q-number {
  font-weight: 800;
  color: #DDD6FE;
  font-size: 1.05rem;
}
.cbt-hall-overlay.dark .cbt-q-topic {
  font-size: 0.82rem;
  color: #94A3B8;
  font-weight: 600;
}
.cbt-hall-overlay.dark .cbt-year-chip {
  background: rgba(139, 92, 246, 0.15);
  color: #C4B5FD;
  font-size: 0.78rem;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
}
.cbt-hall-overlay.dark .cbt-passage-box {
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid #8B5CF6;
  padding: 1.15rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: #CBD5E1;
}
.cbt-hall-overlay.dark .cbt-question-text {
  font-size: 1.22rem;
  line-height: 1.6;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 1.75rem;
}
.cbt-hall-overlay.dark .cbt-option-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 1.05rem 1.25rem;
  color: #E2E8F0;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.cbt-hall-overlay.dark .cbt-option-btn:hover {
  background: rgba(139, 92, 246, 0.12);
  border-color: rgba(139, 92, 246, 0.4);
}
.cbt-hall-overlay.dark .cbt-option-btn.selected {
  background: rgba(139, 92, 246, 0.25);
  border-color: #8B5CF6;
  color: #FFFFFF;
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.3);
}
.cbt-hall-overlay.dark .cbt-option-badge {
  display: inline-flex;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #FFF;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.cbt-hall-overlay.dark .cbt-option-btn.selected .cbt-option-badge {
  background: #8B5CF6;
}
.cbt-hall-overlay.dark .cbt-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.75rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.cbt-hall-overlay.dark .cbt-nav-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  border-radius: 10px;
  padding: 0.75rem 1.35rem;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
}
.cbt-hall-overlay.dark .cbt-flag-btn {
  background: #1E1B2E;
  color: #FFF;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
}
.cbt-hall-overlay.dark .cbt-flag-btn.flagged {
  background: rgba(245, 158, 11, 0.2);
  color: #FDE68A;
  border-color: #F59E0B;
}
.cbt-hall-overlay.dark .cbt-sidebar-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 1.5rem;
}
.cbt-hall-overlay.dark .cbt-sidebar-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 800;
  color: #FFFFFF;
  margin: 0 0 1rem 0;
}
.cbt-hall-overlay.dark .cbt-palette-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #CBD5E1;
}

/* --- Flashcards Study Deck --- */
.flashcard-wrapper {
  perspective: 1000px;
  max-width: 580px;
  margin: 2rem auto;
}
.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 280px;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
  cursor: pointer;
}
.flashcard-inner.flipped {
  transform: rotateY(180deg);
}
.flashcard-front, .flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--radius-lg, 16px);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}
.flashcard-front {
  background: linear-gradient(135deg, #1E1B2E 0%, #161424 100%);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #FFFFFF;
}
.flashcard-back {
  background: linear-gradient(135deg, #182234 0%, #0F172A 100%);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: #FFFFFF;
  transform: rotateY(180deg);
}

/* =========================================================
   DUAL-MODE CBT SWITCHER & 100L CBT PORTAL ENHANCEMENTS
   ========================================================= */

.cbt-dual-mode-header {
  margin-bottom: 2rem;
}

.cbt-mode-nav-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  background: rgba(15, 13, 21, 0.75);
  padding: 0.65rem;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

@media (max-width: 768px) {
  .cbt-mode-nav-container {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }
}

.cbt-mode-tab-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1.5px solid transparent;
  border-radius: 14px;
  cursor: pointer;
  text-align: left;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  color: #94A3B8;
  position: relative;
  width: 100%;
}

.cbt-mode-tab-btn:hover {
  background: rgba(255, 255, 255, 0.07);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.cbt-mode-tab-btn.active {
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.95) 0%, rgba(20, 18, 35, 0.98) 100%);
  border-color: #8B5CF6;
  color: #FFFFFF;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.25);
}

.cbt-mode-icon-circle {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.cbt-icon--100l {
  background: rgba(139, 92, 246, 0.2);
  color: #C084FC;
  border: 1px solid rgba(139, 92, 246, 0.4);
}

.cbt-mode-tab-btn.active .cbt-icon--100l {
  background: #8B5CF6;
  color: #FFFFFF;
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.5);
}

.cbt-icon--utme {
  background: rgba(245, 158, 11, 0.18);
  color: #FBBF24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.cbt-mode-tab-btn.active .cbt-icon--utme {
  background: #F59E0B;
  color: #FFFFFF;
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.5);
}

.cbt-mode-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.cbt-mode-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.12rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.2px;
}


.cbt-mode-badge {
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  flex-shrink: 0;
}

.cbt-badge--100l {
  background: rgba(139, 92, 246, 0.25);
  color: #DDD6FE;
  border: 1px solid rgba(139, 92, 246, 0.4);
}

.cbt-badge--utme {
  background: rgba(245, 158, 11, 0.2);
  color: #FDE68A;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

/* Quick course filtering chips */
.cbt-chip-strip {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.65rem;
  margin-bottom: 1.5rem;
  -webkit-overflow-scrolling: touch;
}

.cbt-quick-chip {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: #334155;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.cbt-quick-chip:hover {
  border-color: #8B5CF6;
  color: #8B5CF6;
  background: rgba(139, 92, 246, 0.05);
  transform: translateY(-1px);
}

.cbt-quick-chip.active {
  background: #8B5CF6;
  color: #FFFFFF;
  border-color: #8B5CF6;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25);
}

.cbt-course-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.75rem;
}.cbt-launch-btn-primary {
  background: var(--grad-brand-primary, linear-gradient(135deg, #8B5CF6 0%, #6D28D9 100%));
  color: #FFFFFF;
  font-weight: 800;
  font-size: 0.84rem;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25);
  transition: all 0.25s var(--ease, cubic-bezier(0.2, 0.7, 0.1, 1));
}

.cbt-launch-btn-primary .app-icon,
.cbt-launch-btn-primary svg {
  transition: transform 0.25s var(--ease, cubic-bezier(0.2, 0.7, 0.1, 1));
}

.cbt-launch-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(139, 92, 246, 0.38);
  filter: brightness(1.08);
}

.cbt-launch-btn-primary:hover .app-icon,
.cbt-launch-btn-primary:hover svg {
  transform: translateX(3px);
}

/* Home Dashboard CBT Launchpad — Redesigned World-Class Light Architecture */
.home-cbt-launchpad-wrap {
  position: relative;
  width: 100%;
}

.home-dashboard-banner {
  background: #FFFFFF;
  border: 1px solid var(--ps-border-light, #E2E8F0);
  border-radius: var(--radius-slab, clamp(20px, 2.2vw, 32px));
  padding: clamp(1.4rem, 2vw, 2rem);
  margin-bottom: 2rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.home-primary-hero-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(248, 250, 252, 0.98) 100%);
  border: 1.5px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-slab, clamp(20px, 2.2vw, 32px));
  padding: clamp(1.75rem, 2.4vw, 2.5rem);
  margin-bottom: 2rem;
  box-shadow: 0 10px 32px rgba(139, 92, 246, 0.1);
  position: relative;
  overflow: hidden;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.75rem;
}

.home-primary-hero-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.home-primary-hero-card.utme-hero {
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 10px 32px rgba(245, 158, 11, 0.1);
}

.home-quick-launchpad-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.25rem;
}

.home-quick-launch-card {
  background: #FFFFFF;
  border: 1px solid var(--ps-border-light, #E2E8F0);
  border-radius: 14px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  cursor: pointer;
}

.home-quick-launch-card:hover {
  transform: translateY(-3px);
  border-color: var(--ps-purple-light, #A855F7);
  box-shadow: 0 12px 28px rgba(139, 92, 246, 0.14);
}

.home-cbt-card {
  background: #FFFFFF;
  border: 1px solid var(--ps-border-light, #E2E8F0);
  border-radius: 14px;
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.home-cbt-card:hover {
  background: #FFFFFF;
  border-color: rgba(168, 85, 247, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(139, 92, 246, 0.12);
}

.home-cbt-card .vault-course-chip {
  background: rgba(139, 92, 246, 0.1);
  color: var(--ps-purple-primary, #8B5CF6);
  font-weight: 800;
  font-size: 0.84rem;
  padding: 0.3rem 0.7rem;
  border-radius: 8px;
}

.home-cbt-card h3 {
  color: #0F172A;
}

.home-cbt-card .course-subtitle {
  color: #64748B;
  font-size: 0.78rem;
  margin-bottom: 0.85rem;
}

.home-cbt-card .course-stat-badge.questions {
  background: #ECFDF5;
  color: #059669;
  border: 1px solid #A7F3D0;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 0.35rem 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* =========================================================
   100L ACADEMIC HUB & CBT EXAM MOBILE RESPONSIVENESS (ECC)
   ========================================================= */

/* Prevent global mobile nav clash during 100L CBT exams & Course Hub (Cross-Browser Safe) */
body.cbt-hall-active .mobile-nav,
body.course-hub-active .mobile-nav,
.cbt-hall-overlay.active ~ .mobile-nav,
#course-hub-overlay:not([style*="display: none"]) ~ .mobile-nav {
  display: none !important;
}

@supports selector(:has(*)) {
  body:has(.cbt-hall-overlay) .mobile-nav {
    display: none !important;
  }
  body:has(.cbt-hall-overlay.active) .mobile-nav {
    display: none !important;
  }
  body:has(#course-hub-overlay:not([style*="display: none"])) .mobile-nav {
    display: none !important;
  }
}

@media (max-width: 768px) {
  /* Course and Materials Grid Single-Column Reflow */
  .courses-grid-100l,
  .vault-materials-grid,
  .home-quick-launchpad-grid {
    grid-template-columns: 1fr !important;
    gap: 1.15rem !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .cbt-course-actions-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  /* Vault Hero & Search Header */
  .vault-header-hero {
    padding: 1.75rem 1.15rem;
    border-radius: 14px;
    margin-bottom: 1.5rem;
  }

  .vault-hero-title {
    font-size: 1.6rem;
    line-height: 1.25;
  }

  .vault-stats-matrix {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0.65rem !important;
  }

  /* Material Cards & Course Cards */
  .material-card,
  .course-card-100l {
    padding: 1.25rem 1rem !important;
    border-radius: 12px !important;
  }

  .material-card-actions {
    flex-direction: column !important;
    gap: 0.5rem !important;
  }

  .material-card-actions a,
  .material-card-actions button {
    width: 100% !important;
    justify-content: center !important;
    min-height: 44px !important;
  }

  /* 100L CBT Exam Hall Layout */
  .cbt-body-layout {
    grid-template-columns: 1fr !important;
    gap: 1.25rem !important;
  }

  .cbt-hall-overlay.dark .cbt-header-bar,
  .cbt-hall-overlay.light .cbt-header-bar {
    padding: 0.85rem 1rem !important;
    border-radius: 12px !important;
    margin-bottom: 1rem !important;
    flex-wrap: wrap !important;
    gap: 0.65rem !important;
  }

  .cbt-course-title {
    font-size: 1.05rem !important;
  }

  .cbt-hall-overlay.dark .cbt-timer-badge,
  .cbt-hall-overlay.light .cbt-timer-badge {
    padding: 0.4rem 0.95rem !important;
    font-size: 1.05rem !important;
  }

  .cbt-hall-overlay.dark .cbt-submit-btn,
  .cbt-hall-overlay.light .cbt-submit-btn {
    padding: 0.55rem 1rem !important;
    min-height: 42px !important;
  }

  .cbt-hall-overlay.dark .cbt-question-card,
  .cbt-hall-overlay.light .cbt-question-card {
    padding: 1.25rem 1rem !important;
    border-radius: 12px !important;
  }

  .cbt-hall-overlay.dark .cbt-question-text,
  .cbt-hall-overlay.light .cbt-question-text {
    font-size: 1.05rem !important;
    line-height: 1.55 !important;
    margin-bottom: 1.25rem !important;
  }

  .cbt-hall-overlay.dark .cbt-option-btn,
  .cbt-hall-overlay.light .cbt-option-btn {
    padding: 0.85rem 1rem !important;
    min-height: 48px !important;
    font-size: 0.95rem !important;
    gap: 0.75rem !important;
  }

  .cbt-hall-overlay.dark .cbt-nav-bar {
    position: sticky !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    background: #0F0D15 !important;
    padding: 0.75rem 0.5rem max(0.75rem, env(safe-area-inset-bottom)) !important;
    z-index: 60 !important;
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.4) !important;
    margin-top: 1.25rem !important;
  }

  .cbt-hall-overlay.light .cbt-nav-bar {
    position: sticky !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    background: #FFFFFF !important;
    padding: 0.75rem 0.5rem max(0.75rem, env(safe-area-inset-bottom)) !important;
    z-index: 60 !important;
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08) !important;
    border-top: 1px solid #E2E8F0 !important;
    margin-top: 1.25rem !important;
  }

  .cbt-nav-btn,
  .cbt-flag-btn {
    min-height: 44px !important;
    padding: 0.65rem 1rem !important;
    font-size: 0.88rem !important;
  }

  /* 4-Item Streamlined Mobile Navigation Ergonomics */
  .mobile-nav-container {
    display: flex !important;
    justify-content: space-around !important;
    align-items: center !important;
    max-width: 500px !important;
    margin: 0 auto !important;
    gap: 0.25rem !important;
  }

  .mobile-nav-btn {
    min-height: 48px !important;
    padding: 0.35rem 0.5rem !important;
    font-size: 0.7rem !important;
    font-weight: 700 !important;
    border-radius: 10px !important;
    transition: all 0.2s ease !important;
  }

  .mobile-nav-btn svg {
    width: 20px !important;
    height: 20px !important;
  }

  .mobile-nav-btn.active {
    color: #C084FC !important;
    background: rgba(139, 92, 246, 0.16) !important;
  }
}

@media (max-width: 480px) {
  .cbt-course-actions-grid {
    grid-template-columns: 1fr !important;
    gap: 0.5rem !important;
  }

  .cbt-course-actions-grid button,
  .cbt-course-actions-grid a {
    width: 100% !important;
    min-height: 44px !important;
    justify-content: center !important;
  }

  .vault-stats-matrix {
    grid-template-columns: 1fr !important;
  }

  .cbt-palette-grid {
    grid-template-columns: repeat(5, 1fr) !important;
    gap: 0.4rem !important;
    max-height: 220px !important;
  }

  .cbt-palette-btn {
    min-height: 40px !important;
    font-size: 0.85rem !important;
  }
}