/* ========================================
   Navigation Components
   ======================================== */
.navbar {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  width: 100% !important;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 9999 !important; /* Very high z-index with !important */
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm); /* Add subtle shadow for better separation */
  margin: 0 !important;
  padding: 0 !important;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-sm); /* Reduced both values to sm for tighter margins */
  max-width: 1400px; /* Increased from 1200px to match main container */
  margin: 0 auto;
}

/* Brand/Logo */
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  font-size: var(--text-xl);
  color: var(--text-primary);
}

.logo {
  color: var(--primary-color);
  display: flex;
  align-items: center;
}

.brand-text {
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  font-weight: 500;
  text-decoration: none;
  position: relative;
}

.nav-link:hover {
  color: var(--primary-color);
  background-color: var(--bg-secondary);
  transform: translateY(-1px);
}

.nav-link.active {
  color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.1);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background-color: var(--primary-color);
  border-radius: 50%;
}

.nav-icon {
  font-size: var(--text-lg);
}

/* Navigation Controls */
.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* Button Styles */
.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--radius-lg);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--text-lg);
}

.btn-icon:hover {
  color: var(--primary-color);
  background-color: var(--bg-secondary);
  transform: translateY(-1px);
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
}

.theme-icon {
  transition: all var(--transition-fast);
}

[data-theme="dark"] .light-icon {
  opacity: 0;
  transform: rotate(180deg);
}

[data-theme="light"] .dark-icon,
:not([data-theme]) .dark-icon {
  opacity: 0;
  transform: rotate(180deg);
}

[data-theme="dark"] .dark-icon {
  opacity: 1;
  transform: rotate(0deg);
}

[data-theme="light"] .light-icon,
:not([data-theme]) .light-icon {
  opacity: 1;
  transform: rotate(0deg);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  position: relative;
}

.hamburger {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  position: relative;
  transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  top: 6px;
}

.mobile-menu-toggle.active .hamburger {
  background: transparent;
}

.mobile-menu-toggle.active .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.mobile-menu-toggle.active .hamburger::after {
  transform: rotate(-45deg);
  top: 0;
}

/* Search Container */
.search-container {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) var(--spacing-lg);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.search-container.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.search-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  max-width: 600px;
  margin: 0 auto;
}

.search-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-btn,
.search-close {
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-btn {
  background: var(--primary-color);
  color: var(--text-inverse);
}

.search-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.search-close {
  background: transparent;
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-close:hover {
  color: var(--danger-color);
  background: rgba(239, 68, 68, 0.1);
}

/* ========================================
   Button Components
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
  white-space: nowrap;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn-primary {
  background: var(--primary-color);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-outline:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--secondary-color);
  color: var(--text-inverse);
}

.btn-secondary:hover {
  background: var(--text-secondary);
  transform: translateY(-2px);
}

.btn-danger {
  background: var(--danger-color);
  color: var(--text-inverse);
}

.btn-danger:hover {
  background: #dc2626;
  transform: translateY(-2px);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--text-sm);
  min-height: 36px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--text-lg);
  min-height: 52px;
}

/* ========================================
   Card Components
   ======================================== */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

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

.card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ========================================
   Form Components
   ======================================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* ========================================
   Contribute Page Styles - Compact Layout
   ======================================== */
.contribute-header {
  text-align: center;
  margin-bottom: var(--spacing-lg); /* Reduced from 2xl to lg */
  padding: var(--spacing-md) 0; /* Reduced from xl to md */
}

.contribute-header h1 {
  margin: 0 0 var(--spacing-sm) 0; /* Reduced from md to sm */
  color: var(--text-primary);
}

.contribute-header p {
  margin: 0 0 var(--spacing-md) 0; /* Reduced from lg to md */
  color: var(--text-secondary);
}

.contribute-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-md); /* Reduced from lg to md */
  margin-top: var(--spacing-md); /* Reduced from xl to md */
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.contribute-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg); /* Reduced from 2xl to lg */
  align-items: start;
  margin-bottom: var(--spacing-lg); /* Reduced from 2xl to lg */
}

.contribute-panel {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  height: fit-content;
  overflow: hidden;
}

.panel-header {
  padding: var(--spacing-md); /* Reduced from lg to md */
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
  margin: 0;
}

.panel-header h2 {
  margin: 0 0 var(--spacing-xs) 0;
  color: var(--text-primary);
  font-size: var(--text-xl);
  font-weight: 600;
}

.panel-header p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.panel-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm); /* Reduced from md to sm */
}

/* Form Styles - Compact */
.question-form {
  padding: var(--spacing-md); /* Reduced from lg to md */
}

.form-section {
  margin-bottom: var(--spacing-lg); /* Reduced from 2xl to lg */
  padding: var(--spacing-md) 0; /* Reduced from lg to md */
  border-bottom: 1px solid var(--border-color);
}

.form-section:first-child {
  padding-top: 0;
}

.form-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.form-section h3 {
  color: var(--primary-color);
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0 0 var(--spacing-md) 0; /* Reduced from lg to md */
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm); /* Reduced from md to sm */
}

.form-group {
  margin-bottom: var(--spacing-md); /* Reduced from lg to md */
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
  font-style: italic;
}

.options-container {
  background: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.option-input {
  position: relative;
}

.option-input::before {
  content: attr(data-option);
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary-color);
  color: white;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 600;
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  margin: var(--spacing-lg) calc(-1 * var(--spacing-lg)) calc(-1 * var(--spacing-lg));
  padding: var(--spacing-lg);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.compact {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--text-sm);
  min-height: 36px;
}

/* Searchable Dropdown Styles */
.searchable-select {
  position: relative;
}

.searchable-select input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--input-bg);
  color: var(--text-primary);
  font-size: var(--text-base);
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.searchable-select input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.searchable-select input::placeholder {
  color: var(--text-muted);
}

.searchable-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--card-bg);
  border: 2px solid var(--primary-color);
  border-top: 1px solid var(--border-color);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  max-height: 250px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(10px);
}

.searchable-dropdown.show {
  display: block;
}

.dropdown-item {
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-fast);
  color: var(--text-primary);
  font-size: var(--text-base);
  background: var(--card-bg);
  font-weight: 500;
  position: relative;
  z-index: 1001;
}

.dropdown-item:hover,
.dropdown-item.active {
  background: var(--primary-color);
  color: white;
  font-weight: 600;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dropdown-item:nth-child(even) {
  background: var(--bg-secondary);
}

.dropdown-item:nth-child(even):hover,
.dropdown-item:nth-child(even).active {
  background: var(--primary-color);
  color: white;
}

.dropdown-item:last-child {
  border-bottom: none;
}

.dropdown-item.no-results {
  color: var(--text-muted);
  cursor: default;
  font-style: italic;
  text-align: center;
}

.dropdown-item.no-results:hover {
  background: transparent;
  color: var(--text-muted);
}

/* Custom scrollbar for dropdown */
.searchable-dropdown::-webkit-scrollbar {
  width: 6px;
}

.searchable-dropdown::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}

.searchable-dropdown::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.searchable-dropdown::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Contributions List - Compact */
.contributions-list {
  padding: var(--spacing-md); /* Reduced from lg to md */
}

.contribution-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-fast);
}

.contribution-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

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

.contribution-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-base);
  line-height: var(--leading-tight);
  flex: 1;
  margin-right: var(--spacing-sm);
}

.contribution-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.meta-item {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.contribution-dates {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
}

.reviewed-date {
  margin-left: var(--spacing-sm);
  padding-left: var(--spacing-sm);
  border-left: 1px solid var(--border-color);
}

.moderator-feedback {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  border-left: 3px solid var(--primary-color);
}

.feedback-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.feedback-content {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
}

.contribution-actions {
  display: flex;
  gap: var(--spacing-xs);
  justify-content: flex-end;
}

/* Status Badges */
.status-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.status-pending {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.status-approved {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-rejected {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.status-draft {
  background: rgba(107, 114, 128, 0.1);
  color: #6b7280;
  border: 1px solid rgba(107, 114, 128, 0.2);
}

/* Difficulty Badges */
.difficulty-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.difficulty-easy {
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.difficulty-medium {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.difficulty-hard {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Empty and Loading States */
.loading-placeholder,
.empty-state,
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
  text-align: center;
  color: var(--text-secondary);
}

.empty-icon,
.error-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-title,
.error-message {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.empty-message {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Form Validation Styles */
.form-input.valid,
.form-textarea.valid,
.form-select.valid {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-input.invalid,
.form-textarea.invalid,
.form-select.invalid {
  border-color: var(--danger-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

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

.validation-error::before {
  content: "⚠️";
  flex-shrink: 0;
}

.character-counter {
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-align: right;
  margin-top: var(--spacing-xs);
}

.character-counter.over-limit {
  color: var(--danger-color);
  font-weight: 600;
}

/* Option Input Styling */
.option-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.option-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary-color);
  color: var(--text-inverse);
  border-radius: 50%;
  font-weight: 600;
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.option-wrapper .form-input {
  flex: 1;
}

/* Form Messages */
.form-message {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  font-size: var(--text-sm);
  font-weight: 500;
}

.form-message-success {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-message-error {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.form-message-info {
  background: rgba(59, 130, 246, 0.1);
  color: #2563eb;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.message-icon {
  flex-shrink: 0;
}

.message-text {
  flex: 1;
}

/* Auto-save Indicator */
.auto-save-indicator {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: var(--z-tooltip);
}

.auto-save-indicator.show {
  opacity: 1;
  transform: translateY(0);
}

.auto-save-indicator::before {
  content: "💾";
  margin-right: var(--spacing-xs);
}

/* Loading States for Form */
.question-form.loading {
  opacity: 0.7;
  pointer-events: none;
}

.question-form .spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: var(--spacing-xs);
}

/* Preview Modal Styles */
.preview-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--spacing-lg);
}

.preview-content {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  width: 100%;
}

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

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

.preview-question {
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.preview-options {
  list-style: none;
  margin: var(--spacing-lg) 0;
}

.preview-option {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.preview-option.correct {
  border-color: var(--accent-color);
  background: rgba(16, 185, 129, 0.1);
}

.preview-explanation {
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
}

/* Responsive adjustments for form */
@media (max-width: 480px) {
  .option-wrapper {
    flex-direction: column;
    align-items: stretch;
  }
  
  .option-label {
    align-self: flex-start;
    margin-bottom: var(--spacing-xs);
  }
  
  .preview-modal {
    padding: var(--spacing-sm);
  }
  
  .auto-save-indicator {
    bottom: 10px;
    right: 10px;
    font-size: 12px;
    padding: 6px 10px;
  }
}

/* Responsive Design for Contribute Page */
@media (max-width: 1024px) {
  .contribute-layout {
    grid-template-columns: 1fr;
    /* gap removed - uses same as desktop */
  }
  
  .form-panel {
    position: static;
  }
  
  .contribute-panel {
    border-radius: var(--radius-md);
    margin: 0 calc(-1 * var(--spacing-md));
  }
}

@media (max-width: 768px) {
  .contribute-stats {
    grid-template-columns: repeat(3, 1fr);
    /* gap removed - uses same as desktop */
  }
  
  .form-row {
    grid-template-columns: 1fr;
    /* gap removed - uses same as desktop */
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .contribution-header {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
  
  .contribution-actions {
    flex-wrap: wrap;
  }
  
  .panel-controls {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 480px) {
  .contribute-panel {
    border-radius: var(--radius-md);
    margin: 0 calc(-1 * var(--spacing-md));
  }
  
  .meta-item {
    font-size: 10px;
    padding: 2px 6px;
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-2xl); /* Maximum comfortable margin on mobile */
  }
  
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-xs);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: var(--spacing-md);
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .search-wrapper {
    flex-direction: column;
    align-items: stretch;
  }
  
  .search-close {
    align-self: center;
  }
}

/* Small laptop/tablet landscape navigation adjustments */
@media (min-width: 769px) and (max-width: 1366px) {
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-2xl); /* Maximum comfortable margin on small laptops */
  }
}

@media (max-width: 640px) {
  .nav-icon {
    display: none;
  }
  
  .btn {
    width: 100%;
  }
  
  .hero-actions {
    width: 100%;
  }
  
  .hero-actions .btn {
    min-width: 200px;
  }
}

/* ========================================
   Desktop Layout Enhancements
   ======================================== */
@media (min-width: 1024px) {
  /* Enhanced desktop spacing */
  .contribute-layout {
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
  }
  
  .contribute-panel {
    padding: 0;
  }
  
  .question-form {
    padding: var(--spacing-xl);
  }
  
  .contributions-list {
    padding: var(--spacing-xl);
  }
  
  .form-section {
    padding: var(--spacing-xl) 0;
  }
  
  .form-section:first-child {
    padding-top: 0;
  }
  
  .form-section:last-child {
    padding-bottom: 0;
  }
}

@media (min-width: 1200px) {
  /* Large desktop optimizations */
  .contribute-layout {
    gap: calc(var(--spacing-2xl) + var(--spacing-lg));
  }
  
  .question-form {
    padding: calc(var(--spacing-xl) + var(--spacing-md));
  }
  
  .contributions-list {
    padding: calc(var(--spacing-xl) + var(--spacing-md));
  }
}

/* ========================================
   Rich Text Editor Integration
   ======================================== */

/* Validation states for rich text editors */
.rich-text-editor.valid {
  border-color: var(--success-color);
}

.rich-text-editor.error {
  border-color: var(--error-color);
}

.rich-text-editor.valid .rich-text-toolbar {
  border-bottom-color: var(--success-color);
}

.rich-text-editor.error .rich-text-toolbar {
  border-bottom-color: var(--error-color);
}

/* Auto-save indicator */
.auto-save-indicator {
  position: fixed;
  top: 80px;
  right: 20px;
  background: var(--success-color);
  color: white;
  padding: 8px 16px;
  border-radius: 4px;
  font-size: 12px;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s ease;
  z-index: 10000;
}

.auto-save-indicator.show {
  opacity: 1;
  transform: translateX(0);
}

/* Enhanced validation error styling */
.validation-error {
  color: var(--error-color);
  font-size: 12px;
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.validation-error::before {
  content: "⚠️";
  font-size: 10px;
}

/* Rich text content styling within forms */
.form-group .rich-text-editor {
  margin-bottom: 0;
}

.form-group .rich-text-editor + .validation-error {
  margin-top: 8px;
}

/* ========================================
   Question Type Selection & Answer Options
   ======================================== */

.answer-type-container {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-secondary);
}

.answer-type-container .form-hint {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 6px;
  margin-bottom: var(--spacing-lg);
  font-weight: 500;
}

/* Option Layout - Selection controls on the left */
.option-group {
  margin-bottom: var(--spacing-md);
}

.option-layout {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-md);
  transition: all 0.2s ease;
}

.option-layout:hover {
  border-color: var(--primary-color);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.1);
}

.option-selector {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  min-height: 44px;
}

.option-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.option-letter {
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--primary-color);
  margin-left: var(--spacing-sm);
}

/* Add Option Controls */
.add-option-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border: 1px dashed var(--border-color);
  border-radius: 6px;
}

.add-option-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.add-option-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.add-option-btn:disabled {
  background: var(--text-secondary);
  cursor: not-allowed;
  transform: none;
}

.option-count-info {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.remove-option-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--danger-color);
  color: white;
  border: none;
  border-radius: 4px;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: var(--spacing-xs);
}

.remove-option-btn:hover {
  background: #dc2626;
  transform: translateY(-1px);
}

.remove-option-btn span {
  font-weight: bold;
}

/* Radio Button Styling - Updated for new layout */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.radio-option {
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
  border: none;
  background: none;
}

.radio-option:hover {
  transform: translateY(-1px);
}

.radio-option input[type="radio"] {
  display: none;
}

.radio-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  margin-right: var(--spacing-sm);
  position: relative;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.radio-option input[type="radio"]:checked + .radio-custom {
  border-color: var(--primary-color);
  background: var(--primary-color);
}

.radio-option input[type="radio"]:checked + .radio-custom::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: white;
  border-radius: 50%;
}

/* Checkbox Styling - Updated for new layout */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.checkbox-option {
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
  border: none;
  background: none;
}

.checkbox-option:hover {
  transform: translateY(-1px);
}

.checkbox-option input[type="checkbox"] {
  display: none;
}

.checkbox-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  margin-right: var(--spacing-sm);
  position: relative;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.checkbox-option input[type="checkbox"]:checked + .checkbox-custom {
  border-color: var(--primary-color);
  background: var(--primary-color);
}

.checkbox-option input[type="checkbox"]:checked + .checkbox-custom::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-weight: bold;
  font-size: 14px;
}

/* Matching Interface - Item-based */
.matching-container {
  background: var(--bg-primary);
  border-radius: 8px;
  padding: var(--spacing-lg);
}

.matching-answers-section h4 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  font-size: var(--text-lg);
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: var(--spacing-sm);
}

.matching-items-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.matching-item {
  background: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.matching-item .form-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.label-marker {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  font-weight: bold;
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.matching-item .remove-option-btn {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: var(--danger-color);
  color: white;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.matching-item .remove-option-btn:hover {
  background: #dc2626;
  transform: scale(1.1);
}

.matching-item .remove-option-btn .remove-icon {
  font-size: 14px;
  font-weight: bold;
}

.matching-options {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: 6px;
}

.matching-options .form-group {
  margin-bottom: 0;
}

/* File input styling */
input[type="file"] {
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-primary);
  cursor: pointer;
  width: 100%;
}

input[type="file"]:hover {
  border-color: var(--primary-color);
}

input[type="file"]:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Text Input Specific Styles */
#textInputOptions .form-group:last-child {
  margin-top: var(--spacing-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
  .matching-answers-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .matching-options {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .option-layout {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }
  
  .option-selector {
    min-height: auto;
    justify-content: flex-start;
  }
  
  .add-option-controls {
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: stretch;
  }
  
  .add-option-btn {
    justify-content: center;
  }
  
  .option-count-info {
    text-align: center;
  }
  
  .answer-type-container {
    padding: var(--spacing-md);
  }
  
  .remove-option-btn {
    align-self: flex-start;
    margin-top: var(--spacing-sm);
  }
  
  .image-upload-section {
    padding: var(--spacing-md);
  }
  
  .label-marker {
    width: 28px;
    height: 28px;
    font-size: var(--text-base);
  }
}

/* ========================================
   Study Mode Page Styles
   ======================================== */

/* Study Page Wrapper */
.study-page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

/* Study Page Header */
.study-page-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.study-main-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 0 var(--spacing-md) 0;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.study-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin: 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Study Modes Grid */
.study-modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

/* Study Mode Cards */
.study-mode-card {
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  height: 280px;
  display: flex;
  flex-direction: column;
}

.study-mode-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.study-mode-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.study-mode-card:hover::before {
  transform: scaleX(1);
}

.study-mode-card.active {
  border-color: var(--primary-color);
  background: rgba(37, 99, 235, 0.05);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.study-mode-card.active::before {
  transform: scaleX(1);
}

/* Mode Badges */
.mode-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.recommended-badge {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-color);
  border: 1px solid rgba(37, 99, 235, 0.3);
}

.popular-badge {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-color);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-icon {
  font-size: var(--text-xs);
}

/* Mode Content */
.mode-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.mode-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-primary);
}

.mode-description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin: 0 0 var(--spacing-lg) 0;
  line-height: var(--leading-relaxed);
  flex: 1;
}

.mode-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-top: auto;
}

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

.feature-icon {
  font-size: var(--text-base);
}

/* Special styling for recommended and popular cards */
.study-mode-card.recommended {
  border-color: rgba(37, 99, 235, 0.3);
  background: rgba(37, 99, 235, 0.02);
}

.study-mode-card.popular {
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.02);
}

/* Subject Configuration Section */
.subject-configuration {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.config-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.config-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.config-icon {
  font-size: var(--text-2xl);
}

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

.subjects-counter {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 600;
}

.advanced-settings-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Subjects Grid */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

/* Subject Cards */
.subject-card {
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.subject-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

.subject-card:hover::before {
  transform: scaleX(1);
}

.subject-card.selected {
  border-color: var(--primary-color);
  background: rgba(37, 99, 235, 0.05);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.subject-card.selected::before {
  transform: scaleX(1);
}

.subject-card.selected::after {
  content: '✓';
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
}

.subject-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.subject-name {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--text-primary);
}

.subject-questions {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0;
}

/* Study Actions */
.study-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

.start-study-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-lg);
  padding: var(--spacing-md) var(--spacing-xl);
}

.start-study-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.start-study-btn:disabled:hover {
  transform: none;
  box-shadow: none;
}

.btn-icon {
  font-size: var(--text-lg);
}

/* Notification Styles */
.notification {
  position: fixed;
  top: 80px;
  right: 20px;
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--primary-color);
  z-index: 10000;
  font-weight: 500;
  min-width: 250px;
  animation: slideInRight 0.3s ease-out;
}

.notification-success {
  border-left-color: var(--accent-color);
}

.notification-error {
  border-left-color: var(--danger-color);
}

.notification-warning {
  border-left-color: #f59e0b;
}

.notification-info {
  border-left-color: var(--primary-color);
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideIn {
  from {
    transform: translateY(-20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Exam Configuration Section */
.exam-configuration {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

/* Exam Type Selection */
.exam-types-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.exam-type-card {
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.exam-type-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

.exam-type-card:hover::before {
  transform: scaleX(1);
}

.exam-type-card.selected {
  border-color: var(--primary-color);
  background: rgba(37, 99, 235, 0.05);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.exam-type-card.selected::before {
  transform: scaleX(1);
}

.exam-type-card.selected::after {
  content: '✓';
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
}

.exam-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.exam-name {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--text-primary);
}

.exam-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0;
}

/* Exam Parts/Steps Selection */
.exam-parts-section {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

.exam-parts-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.exam-parts-title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.parts-counter {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 600;
}

.exam-parts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.exam-part-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.exam-part-card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-color);
  background: var(--bg-primary);
}

.exam-part-card.selected {
  border-color: var(--primary-color);
  background: rgba(37, 99, 235, 0.08);
  box-shadow: var(--shadow-sm);
}

.exam-part-card.selected::after {
  content: '✓';
  position: absolute;
  top: var(--spacing-xs);
  right: var(--spacing-xs);
  width: 18px;
  height: 18px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 10px;
}

.part-icon {
  font-size: 1.25rem;
  color: var(--primary-color);
}

.part-name {
  font-size: var(--text-sm);
  font-weight: 600;
  margin: 0;
  color: var(--text-primary);
  text-align: center;
  line-height: 1.3;
}

.part-description {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin: 0;
  text-align: center;
  line-height: 1.2;
}

/* USMLE Step Styling */
.exam-part-card[data-exam="usmle"] .part-icon {
  color: #dc2626;
}

.exam-part-card[data-exam="usmle"].selected {
  background: rgba(220, 38, 38, 0.08);
  border-color: #dc2626;
}

.exam-part-card[data-exam="usmle"].selected::after {
  background: #dc2626;
}

/* UKMLE Component Styling */
.exam-part-card[data-exam="ukmle"] .part-icon {
  color: #059669;
}

.exam-part-card[data-exam="ukmle"].selected {
  background: rgba(5, 150, 105, 0.08);
  border-color: #059669;
}

.exam-part-card[data-exam="ukmle"].selected::after {
  background: #059669;
}

/* MCCQE Part Styling */
.exam-part-card[data-exam="mccqe"] .part-icon {
  color: #7c3aed;
}

.exam-part-card[data-exam="mccqe"].selected {
  background: rgba(124, 58, 237, 0.08);
  border-color: #7c3aed;
}

.exam-part-card[data-exam="mccqe"].selected::after {
  background: #7c3aed;
}

/* MRCP Part Styling */
.exam-part-card[data-exam="mrcp"] .part-icon {
  color: #ea580c;
}

.exam-part-card[data-exam="mrcp"].selected {
  background: rgba(234, 88, 12, 0.08);
  border-color: #ea580c;
}

.exam-part-card[data-exam="mrcp"].selected::after {
  background: #ea580c;
}

/* MRCS Part Styling */
.exam-part-card[data-exam="mrcs"] .part-icon {
  color: #0891b2;
}

.exam-part-card[data-exam="mrcs"].selected {
  background: rgba(8, 145, 178, 0.08);
  border-color: #0891b2;
}

.exam-part-card[data-exam="mrcs"].selected::after {
  background: #0891b2;
}

/* FCPS Part Styling */
.exam-part-card[data-exam="fcps"] .part-icon {
  color: #be185d;
}

.exam-part-card[data-exam="fcps"].selected {
  background: rgba(190, 24, 93, 0.08);
  border-color: #be185d;
}

.exam-part-card[data-exam="fcps"].selected::after {
  background: #be185d;
}

/* Topic Configuration Section */
.topic-configuration {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

/* Topic Search Section */
.topic-search-section {
  margin-bottom: var(--spacing-xl);
}

.search-input-container {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.search-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: var(--text-lg);
  pointer-events: none;
}

.topic-search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-xl) var(--spacing-md) 3rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.topic-search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-clear-btn {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: 50%;
  display: none;
  transition: all var(--transition-fast);
}

.search-clear-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* Search Suggestions */
.search-suggestions {
  position: relative;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  max-height: 200px;
  overflow-y: auto;
  z-index: 100;
  margin-bottom: var(--spacing-lg);
}

.suggestion-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  border-bottom: 1px solid var(--border-color);
}

.suggestion-item:last-child {
  border-bottom: none;
}

.suggestion-item:hover {
  background: var(--bg-secondary);
}

.suggestion-icon {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.suggestion-text {
  font-size: var(--text-sm);
  color: var(--text-primary);
}

/* Selected Topics Section */
.selected-topics-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.selected-topics-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0 0 var(--spacing-lg) 0;
  color: var(--text-primary);
}

.selected-topics-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.selected-topic-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
}

.topic-label {
  flex: 1;
}

.remove-topic-btn {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  padding: 2px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-size: 12px;
  width: 16px;
  height: 16px;
}

.remove-topic-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

/* Advanced Settings Modal */
.advanced-settings-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.advanced-settings-modal.show {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 9999;
  overflow-y: auto;
}

.modal-container {
  position: relative;
  max-width: 480px;
  width: 85%;
  max-height: 80vh;
  margin: 10vh auto;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(-20px);
  transition: transform var(--transition-normal);
}

.advanced-settings-modal.show .modal-container {
  transform: translateY(0);
}

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

.modal-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.modal-icon {
  font-size: var(--text-lg);
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-size: var(--text-lg);
}

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

.modal-content {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
}

.setting-group {
  margin-bottom: var(--spacing-lg);
}

.setting-group:last-child {
  margin-bottom: 0;
}

.setting-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.label-icon {
  font-size: var(--text-base);
  color: var(--primary-color);
}

.setting-control {
  margin-left: var(--spacing-md);
}

/* Timer specific spacing in modal */
.setting-group .timer-toggle {
  margin-bottom: var(--spacing-sm);
}

.setting-group .timer-options {
  margin-top: var(--spacing-sm);
  width: 100%;
  box-sizing: border-box;
}

/* Ensure toggle switch doesn't overflow */
.setting-group .toggle-switch {
  max-width: 100%;
  overflow: hidden;
}

/* Number Input Controls */
.number-input-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.number-btn {
  width: 28px;
  height: 28px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.number-btn:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.number-input {
  width: 60px;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  text-align: center;
  font-weight: 600;
  font-size: var(--text-sm);
}

.number-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.quick-options {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.quick-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.quick-btn:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

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

/* Timer Controls */
.timer-toggle {
  margin-bottom: var(--spacing-md);
}

.toggle-switch {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  width: 100%;
}

.toggle-switch input {
  position: absolute;
  opacity: 0;
}

.toggle-slider {
  position: relative;
  width: 44px;
  height: 22px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 11px;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  transition: all var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--primary-color);
  border-color: var(--primary-color);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

.toggle-text {
  font-weight: 500;
  color: var(--text-primary);
  font-size: var(--text-sm);
  flex-grow: 1;
  white-space: nowrap;
}

.timer-options {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
  clear: both;
}

.time-input-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.time-label {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: 500;
  min-width: 100px;
}

.timer-preview {
  font-size: var(--text-xs);
  color: var(--primary-color);
  font-weight: 600;
}

/* Radio Options */
.difficulty-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.radio-option {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.radio-option.compact {
  padding: var(--spacing-xs) var(--spacing-sm);
  align-items: center;
  font-size: var(--text-sm);
}

.radio-option:hover {
  background: var(--bg-primary);
  border-color: var(--primary-color);
}

.radio-option input {
  position: absolute;
  opacity: 0;
}

.radio-custom {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  background: var(--bg-primary);
  position: relative;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.radio-custom::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  transition: transform var(--transition-fast);
}

.radio-option input:checked + .radio-custom {
  border-color: var(--primary-color);
}

.radio-option input:checked + .radio-custom::before {
  transform: translate(-50%, -50%) scale(1);
}

.radio-label {
  flex: 1;
}

.difficulty-name {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

/* Checkbox Options */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

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

.checkbox-option:hover {
  background: var(--bg-primary);
  border-color: var(--primary-color);
}

.checkbox-option input {
  position: absolute;
  opacity: 0;
}

.checkbox-custom {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  position: relative;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.checkbox-custom::before {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  color: white;
  font-size: 12px;
  font-weight: 700;
  transform: translate(-50%, -50%) scale(0);
  transition: transform var(--transition-fast);
}

.checkbox-option input:checked + .checkbox-custom {
  background: var(--primary-color);
  border-color: var(--primary-color);
}

.checkbox-option input:checked + .checkbox-custom::before {
  transform: translate(-50%, -50%) scale(1);
}

.checkbox-label {
  flex: 1;
}

.option-name {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

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

.modal-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Responsive Design for Study Mode */
@media (max-width: 1024px) {
  .study-page-wrapper {
    padding: var(--spacing-lg);
  }
  
  .study-modes-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
  }
  
  .subjects-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
  }
  
  .exam-types-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
  }
  
  .exam-parts-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-sm);
  }
}

@media (max-width: 768px) {
  .study-page-wrapper {
    padding: var(--spacing-md);
  }
  
  .study-main-title {
    font-size: 2rem;
  }
  
  .study-modes-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .study-mode-card {
    height: auto;
    min-height: 200px;
  }
  
  .subjects-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
  }
  
  .exam-types-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .exam-parts-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
  }
  
  .config-header {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
  
  .exam-parts-header {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
  
  .config-actions {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .study-actions {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .study-actions .btn {
    width: 100%;
  }
  
  .notification {
    right: var(--spacing-md);
    left: var(--spacing-md);
    min-width: auto;
  }

  .modal-container {
    width: 95%;
    margin: 2vh auto;
    max-height: 96vh;
  }

  .modal-header,
  .modal-content,
  .modal-footer {
    padding: var(--spacing-md);
  }

  .difficulty-options {
    grid-template-columns: 1fr;
    gap: var(--spacing-xs);
  }

  .checkbox-group {
    gap: var(--spacing-xs);
  }

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

  .modal-actions {
    justify-content: stretch;
  }

  .modal-actions .btn {
    flex: 1;
  }
}

@media (max-width: 480px) {
  .study-page-wrapper {
    padding: var(--spacing-sm);
  }
  
  .study-main-title {
    font-size: 1.75rem;
  }
  
  .subject-configuration {
    padding: var(--spacing-lg);
  }
  
  .exam-configuration {
    padding: var(--spacing-lg);
  }
  
  .topic-configuration {
    padding: var(--spacing-lg);
  }
  
  .subjects-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .exam-parts-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .subject-card {
    padding: var(--spacing-md);
  }
  
  .exam-type-card {
    padding: var(--spacing-md);
  }
  
  .exam-part-card {
    padding: var(--spacing-sm);
  }
  
  .subject-icon {
    font-size: 1.5rem;
  }
  
  .exam-icon {
    font-size: 1.5rem;
  }
  
  .part-icon {
    font-size: 1rem;
  }
  
  .subject-name {
    font-size: var(--text-base);
  }
  
  .exam-name {
    font-size: var(--text-base);
  }
  
  .part-name {
    font-size: 11px;
  }
  
  .part-description {
    font-size: 10px;
  }
  
  .mode-badge {
    font-size: 10px;
    padding: 4px 8px;
  }

  .modal-container {
    width: 98%;
    margin: 1vh auto;
    max-height: 98vh;
    border-radius: var(--radius-md);
  }

  .modal-header,
  .modal-content,
  .modal-footer {
    padding: var(--spacing-md);
  }

  .modal-title {
    font-size: var(--text-lg);
  }

  .setting-label {
    font-size: var(--text-base);
  }

  .setting-control {
    margin-left: var(--spacing-md);
  }

  .quick-options {
    grid-template-columns: repeat(2, 1fr);
    display: grid;
  }

  .time-input-group {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }

  .time-label {
    min-width: auto;
    text-align: center;
  }
}

/* ========================================
   Study Mode Tabs
   ======================================== */
.study-tabs {
  display: flex;
  gap: 0;
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--border-color);
  background: transparent;
  border-radius: 8px 8px 0 0;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tab-button {
  background: var(--bg-secondary);
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  cursor: pointer;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
  border-bottom: 3px solid transparent;
  position: relative;
  flex: 1;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tab-button:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.tab-button.active {
  background: var(--bg-primary);
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
  font-weight: 600;
}

.tab-content {
  min-height: 400px;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease-in-out;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Performance Tab Styles */
.performance-stats {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.stat-card {
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

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

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chart-container {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  border: 1px solid var(--border-color);
  height: 400px;
  position: relative;
}

#performanceChart {
  max-width: 100%;
  max-height: 100%;
}

/* History Tab Styles */
.table-container {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  overflow-x: auto;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.session-history {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.session-history th {
  background: var(--bg-secondary);
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  position: sticky;
  top: 0;
}

.session-history td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: middle;
}

.session-history tr:hover {
  background: var(--bg-hover);
}

.no-data {
  text-align: center;
  color: var(--text-muted);
  font-style: italic;
  padding: var(--spacing-xl) !important;
}

/* Score Badge Styles */
.score {
  padding: 4px 8px;
  border-radius: 12px;
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: inline-block;
  min-width: 50px;
  text-align: center;
}

.score.excellent {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  box-shadow: 0 2px 4px rgba(16, 185, 129, 0.3);
}

.score.good {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
  box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
}

.score.average {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
  box-shadow: 0 2px 4px rgba(245, 158, 11, 0.3);
}

.score.poor {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.3);
}

/* Responsive Design for Tabs */
@media (max-width: 768px) {
  .study-tabs {
    flex-direction: column;
    border-radius: var(--radius-md);
  }
  
  .tab-button {
    border-bottom: none;
    border-left: 3px solid transparent;
    text-align: left;
    justify-content: flex-start;
  }
  
  .tab-button.active {
    border-left-color: var(--primary-color);
    border-bottom-color: transparent;
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
  }
  
  .stat-card {
    padding: var(--spacing-md);
  }
  
  .stat-value {
    font-size: 2rem;
  }
  
  .chart-container {
    height: 300px;
    padding: var(--spacing-md);
  }
  
  .table-container {
    padding: var(--spacing-md);
  }
  
  .session-history th,
  .session-history td {
    padding: var(--spacing-sm);
    font-size: var(--text-xs);
  }
}

/* ========================================
   Test Mode Components
   ======================================== */

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

.test-approach-content h2 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--text-2xl);
  font-weight: 700;
}

.test-approach-content p {
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
  font-size: var(--text-base);
}

.test-mode-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.test-mode-card {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.test-mode-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.test-mode-card.recommended {
  border-color: var(--success-color);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(34, 197, 94, 0.05) 100%);
}

.test-mode-card.popular {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(79, 70, 229, 0.05) 100%);
}

.test-mode-card.advanced {
  border-color: var(--warning-color);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(245, 158, 11, 0.05) 100%);
}

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

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.card-badge {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.test-mode-card.recommended .card-badge {
  background: var(--success-color);
}

.test-mode-card.popular .card-badge {
  background: var(--primary-color);
}

.test-mode-card.advanced .card-badge {
  background: var(--warning-color);
}

.test-mode-card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-size: var(--text-xl);
  font-weight: 700;
}

.test-mode-card p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.card-features {
  list-style: none;
  padding: 0;
  margin: var(--spacing-md) 0;
}

.card-features li {
  padding: var(--spacing-xs) 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.card-features li::before {
  content: '✓';
  color: var(--success-color);
  font-weight: bold;
  margin-right: var(--spacing-xs);
}

.card-stats {
  display: flex;
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.card-stats .stat {
  background: var(--bg-tertiary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
}

.test-mode-btn {
  width: 100%;
  margin-top: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  font-weight: 600;
  transition: all var(--transition-normal);
}

.test-mode-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-icon {
  font-size: 1.1rem;
}

/* Test Type Indicators */
.test-type {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.test-type.mock {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  color: white;
}

.test-type.subject {
  background: linear-gradient(135deg, #06b6d4, #0891b2);
  color: white;
}

.test-type.custom {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: white;
}

/* Responsive Design for Test Mode */
@media (max-width: 1024px) {
  .test-mode-cards {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .test-mode-cards {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .test-mode-card {
    padding: var(--spacing-md);
  }
  
  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  .card-badge {
    align-self: flex-end;
  }
  
  .card-stats {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

/* ========================================
   Dashboard Components
   ======================================== */

.dashboard-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--primary-color) 100%);
  border-radius: var(--radius-lg);
  color: white;
  box-shadow: var(--shadow-lg);
}

.dashboard-header h1 {
  font-size: var(--text-3xl);
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
}

.dashboard-header p {
  font-size: var(--text-base);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* Overview Cards */
.dashboard-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.overview-card {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.overview-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.overview-card.study-stats {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(79, 70, 229, 0.05) 100%);
}

.overview-card.test-stats {
  border-color: var(--success-color);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(5, 150, 105, 0.05) 100%);
}

.overview-card.qbank-stats {
  border-color: var(--warning-color);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.chart-mini {
  height: 100px;
  margin-top: var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
}

/* Detailed Analytics */
.dashboard-detailed {
  margin-top: var(--spacing-xl);
}

.analytics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.analytics-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.analytics-card .card-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.time-filter {
  display: flex;
  gap: var(--spacing-xs);
}

.filter-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
}

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

.subject-filter {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.chart-container {
  height: 300px;
  position: relative;
}

/* Question Bank Analytics */
.qbank-metrics {
  margin-top: var(--spacing-lg);
}

.metric-row {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.metric {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex: 1;
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.metric-icon {
  font-size: 2rem;
}

.metric-info {
  flex: 1;
}

.metric-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.metric-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.metric-change {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.metric-change.positive {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success-color);
}

.metric-change.negative {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
}

/* Study Insights */
.insights-content {
  margin-top: var(--spacing-lg);
}

.insight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
}

.insight-icon {
  font-size: 1.5rem;
  min-width: 24px;
}

.insight-text {
  flex: 1;
}

.insight-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.insight-detail {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.insights-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.insights-btn:hover {
  background: var(--primary-color-hover);
  transform: translateY(-1px);
}

/* Study Heatmap */
.study-heatmap {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.study-heatmap h4 {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: 600;
}

.heatmap-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
  margin-bottom: var(--spacing-md);
  max-width: 300px;
}

.heatmap-cell {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.heatmap-cell.level-0 { background: var(--bg-primary); }
.heatmap-cell.level-1 { background: rgba(79, 70, 229, 0.2); }
.heatmap-cell.level-2 { background: rgba(79, 70, 229, 0.4); }
.heatmap-cell.level-3 { background: rgba(79, 70, 229, 0.6); }
.heatmap-cell.level-4 { background: rgba(79, 70, 229, 0.8); }

.heatmap-cell:hover {
  transform: scale(1.2);
  box-shadow: 0 0 0 1px var(--primary-color);
}

.heatmap-legend {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.legend-scale {
  display: flex;
  gap: 2px;
}

.legend-cell {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.legend-cell.level-0 { background: var(--bg-primary); }
.legend-cell.level-1 { background: rgba(79, 70, 229, 0.2); }
.legend-cell.level-2 { background: rgba(79, 70, 229, 0.4); }
.legend-cell.level-3 { background: rgba(79, 70, 229, 0.6); }
.legend-cell.level-4 { background: rgba(79, 70, 229, 0.8); }

.legend-label {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

/* Analytics Toggles */
.analytics-toggles {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.toggle-switch {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.toggle-switch input {
  display: none;
}

.slider {
  width: 40px;
  height: 20px;
  background: var(--bg-tertiary);
  border-radius: 20px;
  position: relative;
  transition: all var(--transition-normal);
}

.slider::before {
  content: '';
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: all var(--transition-normal);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.toggle-switch input:checked + .slider {
  background: var(--primary-color);
}

.toggle-switch input:checked + .slider::before {
  transform: translateX(20px);
}

.toggle-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* Responsive Design for Dashboard */
@media (max-width: 1200px) {
  .dashboard-overview {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
  
  .analytics-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .dashboard-header {
    padding: var(--spacing-md);
  }
  
  .dashboard-header h1 {
    font-size: var(--text-2xl);
  }
  
  .dashboard-overview {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .metric-row {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  .time-filter {
    width: 100%;
    justify-content: center;
  }
  
  .chart-container {
    height: 250px;
  }
}

/* ========================================
   Contribution Detail Modal
   ======================================== */
.contribution-detail {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.detail-section {
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.detail-section h3 {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: 600;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.detail-item.detail-full {
  grid-column: 1 / -1;
}

.detail-item label {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.detail-item span,
.detail-item p {
  color: var(--text-primary);
}

.rich-content {
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  line-height: 1.6;
}

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

.option-display {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.option-display.correct-option {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--success-color);
}

.matching-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.matching-display {
  padding: var(--spacing-sm);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
}

.moderator-feedback-detail {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border-left: 3px solid var(--primary-color);
  border-radius: var(--radius-sm);
}

.moderator-feedback-detail strong {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.modal-large {
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-xl {
  max-width: 1200px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-xl .form-section {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.modal-xl .form-section h3 {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: 600;
}

.modal-xl .form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.modal-xl .form-group {
  margin-bottom: var(--spacing-md);
}

.modal-xl .form-group:last-child {
  margin-bottom: 0;
}

.modal-xl .form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.modal-xl .form-group small {
  display: block;
  margin-top: var(--spacing-xs);
  color: var(--text-muted);
  font-size: var(--text-xs);
}

.notification {
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* ========================================
   Moderation Dashboard
   ======================================== */
.moderation-page {
  padding: var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.moderation-stats {
  margin-bottom: var(--spacing-xl);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-md);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  font-size: 2.5rem;
  line-height: 1;
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-pending {
  border-left: 4px solid #f59e0b;
}

.stat-approved {
  border-left: 4px solid var(--success-color);
}

.stat-rejected {
  border-left: 4px solid var(--danger-color);
}

.stat-time {
  border-left: 4px solid var(--primary-color);
}

.pending-questions-section {
  margin-top: var(--spacing-xl);
}

.section-header {
  margin-bottom: var(--spacing-lg);
}

.section-header h2 {
  font-size: var(--text-2xl);
  color: var(--text-primary);
  margin: 0;
}

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

.moderation-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.moderation-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

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

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

.meta-badge {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
}

.submission-time {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.question-title h3 {
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: 600;
}

.question-preview {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary-color);
}

.preview-label {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-xs);
}

.preview-content {
  color: var(--text-primary);
  line-height: 1.6;
}

.question-type-badge {
  margin: var(--spacing-md) 0;
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
}

.moderation-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.pagination-container {
  margin-top: var(--spacing-xl);
  display: flex;
  justify-content: center;
}

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

.pagination-info {
  padding: 0 var(--spacing-md);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.review-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Responsive */
@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .moderation-actions {
    flex-direction: column;
  }
  
  .moderation-actions .btn {
    width: 100%;
  }
}

/* ========================================
   Admin Dashboard Styles
   ======================================== */
.admin-dashboard {
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.admin-header {
    margin-bottom: var(--spacing-lg);
}

.admin-header h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.admin-header p {
    color: var(--text-secondary);
    font-size: var(--text-lg);
}

/* Admin Statistics Cards */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card.active {
    border-color: var(--success-color);
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), transparent);
}

.stat-card.inactive {
    border-color: var(--danger-color);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), transparent);
}

.stat-icon {
    font-size: 2rem;
    opacity: 0.8;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* Admin Filters */
.admin-filters {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.filter-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.filter-row:last-child {
    margin-bottom: 0;
}

.filter-row input[type="text"] {
    grid-column: 1 / -1;
}

/* Question Table */
.admin-question-list {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.list-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.list-header h2 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--text-primary);
}

.question-table-container {
    overflow-x: auto;
}

.question-table {
    width: 100%;
    border-collapse: collapse;
}

.question-table thead {
    background: var(--bg-tertiary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.question-table th {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.question-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.question-table tbody tr {
    transition: background-color var(--transition-fast);
}

.question-table tbody tr:hover {
    background: var(--bg-hover);
}

.question-table tbody tr.inactive-row {
    opacity: 0.6;
}

.question-table .question-title {
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.question-table .action-buttons {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.question-table .btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    white-space: nowrap;
}

/* No Questions Message */
.no-questions {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.no-questions p {
    font-size: var(--text-lg);
    margin: 0;
}

/* Question Details in View Modal */
.question-details {
    max-height: 70vh;
    overflow-y: auto;
}

.detail-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.detail-section:last-child {
    border-bottom: none;
}

.detail-section h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.detail-grid > div {
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.content-box {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    max-height: 300px;
    overflow-y: auto;
}

.option-item {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--primary-color);
}

/* Edit Form in Modal */
.edit-form {
    max-height: 70vh;
    overflow-y: auto;
}

/* Admin Dashboard Responsive */
@media (max-width: 768px) {
    .admin-stats {
        grid-template-columns: 1fr;
    }
    
    .filter-row {
        grid-template-columns: 1fr;
    }
    
    .question-table-container {
        font-size: 0.875rem;
    }
    
    .question-table th,
    .question-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .question-table .action-buttons {
        flex-direction: column;
    }
}
/* ========================================
   Admin Dashboard Styles
   ======================================== */
.admin-dashboard {
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.admin-header {
    margin-bottom: var(--spacing-lg);
}

.admin-header h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.admin-header p {
    color: var(--text-secondary);
    font-size: var(--text-lg);
}

/* Admin Statistics Cards */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card.active {
    border-color: var(--success-color);
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), transparent);
}

.stat-card.inactive {
    border-color: var(--danger-color);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), transparent);
}

.stat-icon {
    font-size: 2rem;
    opacity: 0.8;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* Admin Filters */
.admin-filters {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.filter-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.filter-row:last-child {
    margin-bottom: 0;
}

.filter-row input[type="text"] {
    grid-column: 1 / -1;
}

/* Question Table */
.admin-question-list {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.list-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.list-header h2 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--text-primary);
}

.question-table-container {
    overflow-x: auto;
}

.question-table {
    width: 100%;
    border-collapse: collapse;
}

.question-table thead {
    background: var(--bg-tertiary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.question-table th {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.question-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.question-table tbody tr {
    transition: background-color var(--transition-fast);
}

.question-table tbody tr:hover {
    background: var(--bg-hover);
}

.question-table tbody tr.inactive-row {
    opacity: 0.6;
}

.question-table .question-title {
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.question-table .action-buttons {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.question-table .btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    white-space: nowrap;
}

/* No Questions Message */
.no-questions {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.no-questions p {
    font-size: var(--text-lg);
    margin: 0;
}

/* Question Details in View Modal */
.question-details {
    max-height: 70vh;
    overflow-y: auto;
}

.detail-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.detail-section:last-child {
    border-bottom: none;
}

.detail-section h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.detail-grid > div {
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.content-box {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    max-height: 300px;
    overflow-y: auto;
}

.option-item {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--primary-color);
}

/* Edit Form in Modal */
.edit-form {
    max-height: 70vh;
    overflow-y: auto;
}

/* Admin List Header with Export/Import */
.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.list-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Dropdown Styles */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 180px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    z-index: 1000;
}

.dropdown-menu.show {
    display: block;
}

.dropdown-menu button {
    display: block;
    width: 100%;
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: var(--text-sm);
}

.dropdown-menu button:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

/* Smaller Icon Buttons for Action Column */
.btn-icon-sm {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.1rem;
}

.btn-icon-sm:hover {
    color: var(--primary-color);
    background-color: var(--bg-secondary);
    transform: translateY(-1px);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: nowrap;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .admin-stats {
        grid-template-columns: 1fr;
    }
    
    .filter-row {
        grid-template-columns: 1fr;
    }
    
    .question-table-container {
        font-size: 0.875rem;
    }
    
    .question-table th,
    .question-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .question-table .action-buttons {
        flex-wrap: wrap;
    }
    
    .list-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .list-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

/* ========================================
   Subject Search Dropdown (Study Mode)
   ======================================== */
.subject-search-container {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.search-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  font-size: var(--text-md);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.label-icon {
  font-size: var(--text-lg);
}

.searchable-dropdown-wrapper {
  position: relative;
}

.subject-search-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--text-md);
  transition: all var(--transition-fast);
}

.subject-search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.subject-search-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-xs));
  left: 0;
  right: 0;
  max-height: 300px;
  overflow-y: auto;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  display: none;
}

.subject-search-dropdown.show {
  display: block;
}

.subject-search-dropdown .dropdown-item {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
}

.subject-search-dropdown .dropdown-item:last-child {
  border-bottom: none;
}

.subject-search-dropdown .dropdown-item:hover {
  background: var(--bg-secondary);
  color: var(--primary-color);
}

.subject-search-dropdown .dropdown-item.no-results {
  color: var(--text-tertiary);
  cursor: default;
  text-align: center;
  padding: var(--spacing-lg);
}

.subject-search-dropdown .dropdown-item.no-results:hover {
  background: transparent;
  color: var(--text-tertiary);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .subject-search-container {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
  }
  
  .subject-search-dropdown {
    max-height: 200px;
  }
}