/**
 * ============================================================================
 * TEST BUILDER UI
 * Matches PastPapersAcademy.Com design system
 * Two-column layout: Question Bank (left) | Test Preview (right)
 * ============================================================================
 */

/* ===================================
   MAIN CONTAINER
   =================================== */
.test-builder-page {
  background: var(--background-alt);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  margin: 2rem;
  border-top: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

/* ===================================
   TOP BAR (Breadcrumb)
   =================================== */
.test-builder-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background: var(--background);
  flex-shrink: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-light);
}

.breadcrumb a {
  color: var(--text-light);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--primary-color);
}

.breadcrumb i {
  font-size: 0.6rem;
  color: var(--text-muted);
}

.breadcrumb span {
  color: var(--text-dark);
  font-weight: 600;
}

.btn-edit-title {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.95rem;
}

.btn-edit-title:hover {
  background: var(--background-alt);
  color: var(--primary-color);
  border-color: var(--primary-color);
  box-shadow: 0 2px 8px rgba(232, 17, 35, 0.15);
}

.btn-edit-title:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(232, 17, 35, 0.2);
  border-color: var(--primary-color);
}

.test-builder-top-bar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.beta-badge {
  background: rgba(5, 150, 105, 0.08);
  border: 1.5px dashed var(--secondary-dark);
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--secondary-dark);
  animation: subtle-pulse 3s ease-in-out infinite;
}

@keyframes subtle-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.75; }
}

/* ===================================
   TWO-COLUMN LAYOUT
   =================================== */
.test-builder-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  flex: 1;
  overflow: hidden;
}

/* ===================================
   LEFT PANEL: Question Bank
   =================================== */
.question-bank-panel {
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  background: var(--background-alt);
  overflow: hidden;
  min-height: 0;
}

/* Filters Bar */
.filters-bar {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background: var(--background);
  flex-wrap: wrap;
  flex-shrink: 0;
}

.filter-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--background);
  color: var(--text-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.filter-btn:hover {
  background: var(--background-alt);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.filter-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.filter-btn i {
  font-size: 0.75rem;
}

/* Filter Dropdown */
.filter-dropdown {
  position: fixed;
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 250px;
  max-width: 350px;
  max-height: 400px;
  overflow: hidden;
  z-index: 10000;
  display: flex;
  flex-direction: column;
}

.filter-dropdown-header {
  padding: var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border-color);
  background: var(--background-alt);
}

.filter-dropdown-content {
  overflow-y: auto;
  max-height: 350px;
}

.filter-group-label {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--background-alt);
  border-bottom: 1px solid var(--border-color);
}

.filter-option {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--text-dark);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.filter-option:last-child {
  border-bottom: none;
}

.filter-option:hover {
  background: var(--background-alt);
  color: var(--primary-color);
}

.filter-option.active {
  background: var(--primary-light);
  color: var(--primary-color);
  font-weight: 600;
}

.filter-option i {
  font-size: var(--font-size-xs);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.filter-option.active i {
  opacity: 1;
}

.filter-option .difficulty-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: capitalize;
}

/* Questions Count */
.questions-count {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--text-light);
  background: var(--background);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

#questionsShown {
  font-weight: 700;
  color: var(--text-dark);
}

/* Questions List */
.questions-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
}

/* Question Card */
.question-card {
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  padding-right: 3rem; /* Space for checkbox */
  margin-bottom: var(--spacing-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  height: 280px; /* Uniform height for all cards */
  display: flex;
  flex-direction: column;
}

.question-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.question-card.selected {
  border-color: var(--primary-color);
  background: var(--background);
  box-shadow: 0 0 0 2px var(--primary-color);
}

.question-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.question-preview-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--background-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-right: var(--spacing-sm);
}

.question-card.selected .question-preview-icon {
  background: var(--primary-color);
  color: white;
}

.question-title-wrapper {
  display: flex;
  align-items: center;
  flex: 1;
}

.question-difficulty-badge {
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: capitalize;
}

.difficulty-easy {
  background: var(--secondary-light);
  color: var(--secondary-dark);
}

.difficulty-medium {
  background: #fed7aa;
  color: #9a3412;
}

.difficulty-hard {
  background: #fecaca;
  color: #991b1b;
}

.question-marks {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  font-weight: 500;
  margin-left: auto;
}

.question-card-topic {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-xs);
}

.topic-icon {
  font-size: 0.875rem;
}

.question-card-content {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  line-height: 1.5;
  margin-bottom: var(--spacing-xs);
  flex: 1;
  overflow: hidden;
  position: relative;
  background: var(--background-alt);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.part-preview {
  margin-top: 0.5rem;
  padding-left: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.4;
}

.part-preview strong {
  color: var(--text-dark);
  font-weight: 600;
}

.nested-parts-preview {
  margin-top: 0.25rem;
  padding-left: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
}

.more-parts-indicator {
  margin-top: 0.5rem;
  padding: 0.25rem 0.5rem;
  background: var(--background-alt);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  display: inline-block;
}

.question-card-meta {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-sm);
}

.meta-tag {
  font-size: var(--font-size-xs);
  background: var(--background-alt);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.has-diagram-tag {
  background: var(--primary-light);
  color: var(--primary-dark);
}

/* Checkbox */
.question-checkbox {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 20px;
  height: 20px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--background);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.question-card:hover .question-checkbox {
  border-color: var(--primary-color);
}

.question-card.selected .question-checkbox {
  background: var(--primary-color);
  border-color: var(--primary-color);
}

.question-checkbox i {
  color: white;
  font-size: 0.75rem;
  display: none;
}

.question-card.selected .question-checkbox i {
  display: block;
}

/* ===================================
   RIGHT PANEL: Test Preview
   =================================== */
.test-preview-panel {
  display: flex;
  flex-direction: column;
  background: var(--background);
  overflow: hidden;
}

/* Empty State */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  padding: var(--spacing-2xl);
}

.empty-state i {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-muted);
  opacity: 0.3;
}

.empty-state p {
  font-size: var(--font-size-lg);
}

/* Test Content */
.test-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
}

.selected-questions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Selected Question Card (in right panel) */
.selected-question-item {
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  position: relative;
}

.selected-question-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-sm);
}

.question-number-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-dark);
}

.question-number-label .question-index {
  background: var(--primary-color);
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.selected-question-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.action-icon-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-color);
  background: var(--background);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-muted);
}

.action-icon-btn:hover {
  background: var(--background-alt);
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.selected-question-preview {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.selected-question-preview .part-preview {
  margin-top: var(--spacing-sm);
  padding-left: 1rem;
  border-left: 1px solid var(--border-color);
}

.selected-question-preview .part-preview strong {
  color: var(--text-dark);
  display: block;
  margin-bottom: 0.25rem;
}

.question-diagram-preview {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  text-align: center;
  background: var(--background-alt);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.question-diagram-preview img {
  max-width: 100%;
  width: auto;
  height: auto;
  border-radius: var(--radius-md);
  display: inline-block;
}

/* Bottom Actions Bar */
.bottom-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  /* border-top: 1px solid var(--border-color); */
  background: var(--background);
  gap: var(--spacing-md);
  flex-shrink: 0;
}

.left-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.right-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.save-status {
  font-size: var(--font-size-sm);
  color: var(--secondary-dark);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.save-status i {
  color: var(--secondary-color);
}

/* Buttons */
.btn-primary {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.btn-primary:hover {
  background: #c80530;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-secondary {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--background);
  color: var(--text-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.btn-secondary:hover {
  background: var(--background-alt);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-download {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--secondary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.btn-download:hover {
  background: var(--secondary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* ===================================
   SCROLLBAR STYLING
   =================================== */
.questions-list::-webkit-scrollbar,
.test-preview-panel::-webkit-scrollbar {
  width: 8px;
}

.questions-list::-webkit-scrollbar-track,
.test-preview-panel::-webkit-scrollbar-track {
  background: var(--background-alt);
}

.questions-list::-webkit-scrollbar-thumb,
.test-preview-panel::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.questions-list::-webkit-scrollbar-thumb:hover,
.test-preview-panel::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

/* Screen size too small message */
.screen-too-small-message {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  /* background: #1a1a1a; */
  background: var(--background);
  z-index: 100000;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-normal);
}

.screen-too-small-message i {
  font-size: 4rem;
  color: var(--text-dark);
  margin-bottom: 1.5rem;
  transition: all var(--transition-normal);
}

.screen-too-small-message h2 {
  font-size: 1.5rem;
  color: var(--text-dark);
  margin-bottom: 1rem;
  font-weight: 600;
  transition: all var(--transition-normal);
}

.screen-too-small-message p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.6;
  transition: all var(--transition-normal);
}

.screen-message-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
  width: 100%;
  max-width: 500px;
}

.btn-screen-action {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  border: none;
  font-family: inherit;
}

.btn-screen-action i {
  font-size: 1rem;
  align-self: center;
}

.btn-screen-action.btn-primary {
  background: var(--primary-color);
  color: var(--text-dark);
}

.btn-screen-action.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.btn-screen-action.btn-secondary {
  background: var(--background-alt);
  color: var(--text-dark);
  border: 1px solid var(--border-color);
}

.btn-screen-action.btn-secondary:hover {
  background: var(--background);
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-2px);
}

.desktop-site-tip {
  margin-top: 2rem;
  padding: 1rem 1.5rem;
  background: var(--background-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  max-width: 500px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.desktop-site-tip i {
  font-size: 1.25rem;
  color: var(--warning-color);
  margin: 0;
}

.desktop-site-tip p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-light);
  text-align: left;
}

.desktop-site-tip strong {
  color: var(--text-dark);
  font-weight: 600;
}

/* Medium Desktop Optimization */
@media (max-width: 1366px) {
  .test-builder-page {
    margin: 1.5rem;
  }

  .test-builder-top-bar {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .breadcrumb {
    font-size: var(--font-size-xs);
    gap: var(--spacing-xs);
  }

  .filters-bar {
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }

  .filter-btn {
    padding: 0.4rem 0.875rem;
    font-size: var(--font-size-sm);
  }

  .questions-list {
    padding: var(--spacing-md);
  }

  .question-card {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
  }

  .test-content {
    padding: var(--spacing-md);
  }

  .selected-question-item {
    padding: var(--spacing-sm);
  }

  .btn-primary,
  .btn-secondary {
    padding: var(--spacing-xs) var(--spacing-md);
  }
}

@media (max-width: 889px) {
  .test-builder-page,
  .test-builder-top-bar,
  .test-builder-layout {
    display: none !important;
  }

  .screen-too-small-message {
    display: flex !important;
  }

  .screen-message-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
    width: 100%;
    max-width: 500px;
  }
}

@media /*(min-width: 890px) and */(max-width: 1024px) {
  .filters-bar {
    padding: var(--spacing-sm);
    gap: var(--spacing-xs);
  }

  .filter-btn {
    padding: 0.375rem 0.75rem;
    font-size: var(--font-size-xs);
  }

  .questions-list {
    padding: var(--spacing-sm);
  }

  .question-card {
    padding: var(--spacing-sm);
    padding-right: 2.5rem;
  }

  .test-content {
    padding: var(--spacing-md);
  }

  .breadcrumb {
    font-size: var(--font-size-xs);
  }

  .left-actions,
  .right-actions {
    width: 100%;
    justify-content: space-between;
  }

  .right-actions {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .btn-primary,
  .btn-secondary,
  .btn-download {
    width: 100%;
    justify-content: center;
  }

  .test-builder-layout {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 4fr auto;
  }

  .test-builder-page {
    background: var(--background-alt);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin: 0rem;
    transition: all var(--transition-fast);
  }

  .question-bank-panel {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    min-height: 0;
    border-right: 1px solid var(--border-color);
  }

  .test-preview-panel {
    max-height: auto;
    overflow-y: auto;
  }
  .btn-primary,
  .btn-secondary,
  .btn-download {
    width: 100%;
    justify-content: center;
    font-size: var(--font-size-sm);
  }
  .btn-download i {
    display: none;
  }

  .bottom-actions {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
  }
}

/* @media (max-width: 768px) {
} */

/* ===================================
   LOADING & EMPTY STATES
   =================================== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--background-dark);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ===================================
   PREVIEW MODAL
   =================================== */
.preview-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.preview-modal.active {
  opacity: 1;
  visibility: visible;
}

.preview-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--modal-overlay);
  backdrop-filter: blur(4px);
}

.preview-modal-content {
  position: relative;
  width: 90vw;
  max-width: 900px;
  height: 90vh;
  background: var(--background);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.preview-modal.active .preview-modal-content {
  transform: scale(1);
}

/* Modal Header */
.preview-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background: var(--background-alt);
  flex-shrink: 0;
}

.preview-modal-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-dark);
}

.preview-modal-title i {
  color: var(--primary-color);
  font-size: var(--font-size-xl);
}

.preview-modal-close {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-light);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-size: var(--font-size-lg);
}

.preview-modal-close:hover {
  background: var(--background);
  color: var(--accent-red);
}

/* Modal Body */
.preview-modal-body {
  flex: 1;
  overflow: hidden;
  background: var(--modal-page-background);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

/* Pages Container */
.preview-pages-container {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Individual Page */
.preview-page {
  position: absolute;
  width: 750px;
  max-width: 100%;
  height: 100%;
  background: var(--page-white);
  box-shadow: var(--shadow-lg);
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(50px);
  transition: all 0.3s ease;
  overflow: auto;
}

.preview-page.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.preview-page-inner {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Cover Page */
.preview-cover-page {
  padding: 60px 50px;
  display: flex;
  flex-direction: column;
  gap: 40px;
  flex: 1;
}

.preview-cover-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-dark);
  text-align: center;
  margin-bottom: 10px;
}

.preview-cover-subject {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 40px;
}

.preview-cover-instructions {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  background: var(--background-alt);
}

.preview-instructions-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 15px;
}

.preview-instructions-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.preview-instructions-list li {
  font-size: var(--font-size-base);
  color: var(--text-dark);
  padding-left: 25px;
  position: relative;
}

.preview-instructions-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
  font-size: 20px;
}

.preview-cover-fields {
  display: flex;
  flex-direction: column;
  gap: 30px;
  margin-top: 40px;
}

.preview-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.preview-field label {
  font-weight: 600;
  color: var(--text-dark);
  font-size: var(--font-size-base);
}

.preview-field-line {
  border-bottom: 1px solid var(--text-dark);
  height: 30px;
}

/* Question Content */
.preview-questions-content {
  padding: 40px 50px;
  flex: 1;
}

.preview-question {
  margin-bottom: 40px;
  page-break-inside: avoid;
}

.preview-question:last-child {
  margin-bottom: 0;
}

.preview-question-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-color);
}

.preview-question-number {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
}

.preview-question-marks {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-light);
}

.preview-question-stem {
  font-size: var(--font-size-base);
  color: var(--text-dark);
  line-height: 1.6;
  margin-bottom: 15px;
}

/* Diagram Placeholder */
.preview-question-diagram {
  margin: 20px 0;
}

.preview-diagram-placeholder {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px;
  background: var(--background-alt);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.preview-diagram-placeholder i {
  font-size: 40px;
  color: var(--text-muted);
}

.preview-diagram-description {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  font-style: italic;
}

/* Table */
.preview-question-table {
  margin: 20px 0;
}

.preview-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border-color);
}

.preview-table th,
.preview-table td {
  border: 1px solid var(--border-color);
  padding: 10px 15px;
  text-align: left;
}

.preview-table th {
  background: var(--background-alt);
  font-weight: 600;
  color: var(--text-dark);
}

.preview-table td {
  color: var(--text-dark);
}

/* Question Parts */
.preview-question-parts {
  margin-top: 20px;
}

.preview-question-part {
  display: flex;
  gap: 15px;
  margin-bottom: 25px;
}

.preview-part-label {
  font-weight: 600;
  color: var(--text-dark);
  font-size: var(--font-size-base);
  flex-shrink: 0;
  min-width: 30px;
}

.preview-part-content {
  flex: 1;
}

.preview-part-instruction {
  font-size: var(--font-size-base);
  color: var(--text-dark);
  line-height: 1.6;
  margin-bottom: 10px;
}

.preview-part-marks {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-light);
  margin-left: 10px;
}

/* Answer Spaces */
.preview-answer-space {
  margin-top: 15px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.preview-answer-line {
  border-bottom: 1px dotted var(--border-color);
  height: 30px;
}

/* Page Footer */
.preview-page-footer {
  margin-top: auto;
  padding: 20px 50px;
  border-top: 1px solid var(--border-color);
  background: var(--background-alt);
  text-align: center;
  flex-shrink: 0;
}

.preview-footer-text {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* Modal Footer */
.preview-modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background: var(--background-alt);
  flex-shrink: 0;
}

.preview-page-info {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  font-weight: 500;
}

.preview-page-info span {
  font-weight: 700;
  color: var(--text-dark);
}

.preview-navigation {
  display: flex;
  gap: var(--spacing-sm);
}

.preview-nav-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--primary-color);
  color: var(--page-white);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: all var(--transition-fast);
}

.preview-nav-btn:hover:not(:disabled) {
  background: var(--primary-shade);
  transform: translateY(-2px);
  box-shadow: var(--button-hover-shadow);
}

.preview-nav-btn:disabled {
  background: var(--background);
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.5;
}

.preview-nav-btn i {
  font-size: 0.8em;
}

/* Responsive */
@media (max-width: 768px) {
  .preview-modal-content {
    width: 95vw;
    height: 95vh;
  }

  .preview-page {
    width: 100%;
  }

  .preview-cover-page,
  .preview-questions-content {
    padding: 30px 25px;
  }

  .preview-page-footer {
    padding: 15px 25px;
  }

  .preview-modal-footer {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: stretch;
  }

  .preview-navigation {
    justify-content: space-between;
  }

  .preview-nav-btn {
    flex: 1;
  }
}

/* ===================================
   QUESTION OPTIONS MODAL
   =================================== */
.question-options-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.question-options-modal.active {
  opacity: 1;
  visibility: visible;
}

.question-options-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  cursor: pointer;
}

.question-options-content {
  position: relative;
  background: var(--background);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 90%;
  max-width: 400px;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.question-options-modal.active .question-options-content {
  transform: scale(1);
}

.question-options-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background: var(--background-alt);
}

.question-options-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-dark);
  margin: 0;
}

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

.close-modal-btn:hover {
  background: var(--background);
  color: var(--text-dark);
}

.question-options-body {
  padding: var(--spacing-lg);
}

.question-options-info {
  background: var(--background-alt);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.question-option-label {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.question-option-topic {
  font-size: var(--font-size-md);
  color: var(--text-dark);
  font-weight: 600;
  text-transform: capitalize;
  margin-bottom: var(--spacing-xs);
}

.question-option-marks {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.question-options-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.question-option-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-dark);
  font-size: var(--font-size-md);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.question-option-btn:hover:not(:disabled) {
  background: var(--background-alt);
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateX(4px);
}

.question-option-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.question-option-btn i {
  width: 20px;
  text-align: center;
  font-size: var(--font-size-md);
}

.question-option-btn.move-up-btn:hover:not(:disabled) {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.question-option-btn.move-down-btn:hover:not(:disabled) {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.question-option-btn.remove-btn {
  color: var(--danger-color);
  border-color: var(--danger-color);
  background: rgba(220, 38, 38, 0.05);
}

.question-option-btn.remove-btn:hover:not(:disabled) {
  background: var(--danger-color);
  color: white;
  border-color: var(--danger-color);
  transform: translateX(0);
}

/* ===================================
   MCQ QUESTION STYLES
   =================================== */

/* MCQ Badge in Cards */
.mcq-badge,
.question-type-badge.mcq-badge {
  background-color: #10b981;
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* MCQ Options Container */
.mcq-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
}

/* MCQ Option Item */
.mcq-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--background);
}

.mcq-option:hover {
  background-color: var(--background-alt);
  border-color: var(--primary-color);
}

.mcq-option.selected {
  background-color: rgba(232, 17, 35, 0.05);
  border-color: var(--primary-color);
}

/* MCQ Option Label (A, B, C, D bubble) */
.mcq-option-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  font-weight: 600;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.mcq-option:hover .mcq-option-label {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.mcq-option.selected .mcq-option-label {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* MCQ Option Text */
.mcq-option-text {
  flex: 1;
  line-height: 1.5;
  padding-top: 3px;
}

/* MCQ Options Preview in Question Cards */
.mcq-options-preview {
  margin-top: 8px;
  font-size: var(--font-size-sm);
}

.mcq-option-preview {
  padding: 4px 0;
  color: var(--text-light);
}

.mcq-option-preview strong {
  color: var(--text-dark);
  margin-right: 6px;
}

/* MCQ Options Display in Selected Panel */
.mcq-options-display {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}

.mcq-option-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 12px;
  background: var(--background-alt);
  border-radius: var(--radius-sm);
}

.mcq-option-item .mcq-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  font-weight: 600;
  font-size: var(--font-size-xs);
  flex-shrink: 0;
}

.mcq-option-item .mcq-text {
  flex: 1;
  font-size: var(--font-size-sm);
  line-height: 1.4;
  padding-top: 2px;
}

/* Preview Modal MCQ Styles */
.preview-mcq-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 16px 0;
}

.preview-mcq-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
}

.preview-mcq-bubble {
  width: 26px;
  height: 26px;
  border: 2px solid #d1d5db;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
  color: var(--text-dark);
}

.preview-mcq-text {
  flex: 1;
  line-height: 1.5;
  padding-top: 3px;
}

/* MCQ Mark Scheme Styles */
.mcq-mark-scheme .mcq-correct-answer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background-color: #dcfce7;
  border-radius: var(--radius-md);
  margin: 8px 0;
}

.mcq-correct-answer .correct-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: #22c55e;
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: var(--font-size-md);
}

.mcq-correct-answer .correct-text {
  flex: 1;
  font-weight: 500;
  color: #166534;
}

.mcq-explanation {
  padding: 8px 12px;
  margin-top: 8px;
  font-size: var(--font-size-sm);
  color: var(--text-light);
  font-style: italic;
  border-left: 3px solid var(--border-color);
}

/* Preview Type Badge */
.preview-type-badge {
  display: inline-block;
  margin-top: 8px;
}

/* ============================================================================
   ERROR STATE STYLES
   ============================================================================ */
.error-state {
  text-align: center;
  padding: 3rem 2rem;
  max-width: 500px;
  margin: 0 auto;
}

.error-state-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.error-state-icon i {
  font-size: 2.5rem;
  color: #d97706;
}

.error-state-icon.error {
  background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
}

.error-state-icon.error i {
  color: var(--accent-red);
}

.error-state .beta-badge {
  display: inline-flex;
  margin-bottom: 1rem;
}

.error-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 0 0 0.75rem;
}

.error-state-message {
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0 0 1.5rem;
}

.error-state-suggestions {
  background: var(--background-alt);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.suggestions-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}

.suggestions-grid {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.suggestion-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--background-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-dark);
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.suggestion-link:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateX(4px);
}

.suggestion-link i {
  color: var(--secondary-color);
}

.error-state-feedback {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}

.error-state-feedback p {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}

.feedback-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: #25D366;
  color: white;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
}

.feedback-btn:hover {
  background: #128C7E;
  transform: translateY(-2px);
}

.feedback-btn i {
  font-size: 1.1rem;
}