* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #22c55e;
  --warning: #f59e0b;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.5;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

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

.btn-danger:hover {
  background: var(--danger-hover);
}

.btn-outline {
  background: white;
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
}

.btn-outline:hover {
  background: var(--gray-50);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

/* Cards */
.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 24px;
  margin-bottom: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

/* Tables */
.table-container {
  overflow-x: auto;
}

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

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

th {
  font-weight: 600;
  font-size: 13px;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--gray-50);
}

tr:hover {
  background: var(--gray-50);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-pending {
  background: var(--gray-100);
  color: var(--gray-600);
}

.badge-progress {
  background: #dbeafe;
  color: #1d4ed8;
}

.badge-completed {
  background: #dcfce7;
  color: #166534;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s;
}

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

.modal {
  background: white;
  border-radius: 16px;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(-20px);
  transition: transform 0.2s;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--gray-400);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
}

/* Image upload */
.image-upload {
  border: 2px dashed var(--gray-300);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.image-upload:hover {
  border-color: var(--primary);
  background: var(--gray-50);
}

.image-upload input {
  display: none;
}

.image-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.image-preview-item {
  position: relative;
  width: 100px;
  height: 100px;
}

.image-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
}

.image-preview-item .remove-image {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 24px;
  height: 24px;
  background: var(--danger);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
}

/* Choice items */
.choice-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  margin-bottom: 10px;
}

.choice-item.correct {
  border-color: var(--success);
  background: #f0fdf4;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 20px;
}

.tab {
  padding: 10px 20px;
  border: none;
  background: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--gray-800);
}

.stat-label {
  font-size: 14px;
  color: var(--gray-500);
  margin-top: 4px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
  opacity: 0.5;
}

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.alert-success {
  background: #dcfce7;
  color: #166534;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
}

.alert-warning {
  background: #fef3c7;
  color: #92400e;
}

/* Test Page Specific */
.test-header {
  background: var(--gray-800);
  color: white;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

.test-timer {
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.test-timer.warning {
  color: var(--warning);
}

.test-timer.danger {
  color: var(--danger);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.test-container {
  max-width: 800px;
  margin: 100px auto 40px;
  padding: 0 20px;
}

.question-card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 32px;
}

.question-number {
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 8px;
}

.question-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--gray-100);
  border-radius: 20px;
  font-size: 12px;
  color: var(--gray-600);
  margin-bottom: 16px;
}

.question-text {
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 24px;
  line-height: 1.6;
}

.question-images {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.question-images img {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s;
}

.question-images img:hover {
  transform: scale(1.02);
}

/* Answer Options */
.answer-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.answer-option:hover {
  border-color: var(--primary);
  background: var(--gray-50);
}

.answer-option.selected {
  border-color: var(--primary);
  background: rgba(79, 70, 229, 0.05);
}

.answer-option input {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
}

.answer-option-content {
  flex: 1;
}

.answer-option-image {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 6px;
}

.text-answer {
  width: 100%;
  min-height: 150px;
  padding: 16px;
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  font-size: 16px;
  resize: vertical;
}

.text-answer:focus {
  outline: none;
  border-color: var(--primary);
}

/* Navigation */
.test-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 32px;
}

.question-dots {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 24px;
}

.question-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--gray-300);
  background: white;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

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

.question-dot.current {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
}

.question-dot.answered {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

/* Violations Warning */
.violation-warning {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--danger);
  color: white;
  padding: 16px 32px;
  border-radius: 12px;
  font-weight: 500;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    transform: translateX(-50%) translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
  }
}

/* Fullscreen prompt */
.fullscreen-prompt {
  position: fixed;
  inset: 0;
  background: var(--gray-900);
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  text-align: center;
  padding: 20px;
}

.fullscreen-prompt h2 {
  font-size: 28px;
  margin-bottom: 16px;
}

.fullscreen-prompt p {
  font-size: 16px;
  color: var(--gray-400);
  margin-bottom: 32px;
  max-width: 500px;
}

/* Progress bar */
.progress-bar {
  height: 4px;
  background: var(--gray-200);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 20px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s ease;
}

/* Copy link */
.copy-link {
  display: flex;
  gap: 8px;
}

.copy-link input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 14px;
  background: var(--gray-50);
}

/* Responsive */
@media (max-width: 768px) {
  .test-header {
    padding: 12px 16px;
  }

  .test-container {
    margin-top: 80px;
  }

  .question-card {
    padding: 20px;
  }

  .question-text {
    font-size: 18px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}