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

    .bombers-app-container {
      width: 100%;
      min-height: 600px;
      background: linear-gradient(135deg, #1a1a1a 0%, #2d0000 100%);
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
      padding: 2rem 1rem;
      display: flex;
      justify-content: center;
      align-items: flex-start;
    }

    .bombers-content-wrapper {
      max-width: 900px;
      width: 100%;
      background: #ffffff;
      border-radius: 16px;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
      padding: 3rem;
    }

    .bombers-header {
      text-align: center;
      margin-bottom: 2.5rem;
    }

    .bombers-logo-badge {
      display: inline-block;
      background: #dc2626;
      color: white;
      padding: 0.5rem 1.5rem;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 1rem;
      letter-spacing: 1px;
    }

    .bombers-h1 {
      color: #1a1a1a;
      font-size: 2.2rem;
      margin: 0.5rem 0;
      font-weight: 800;
    }

    .bombers-h2 {
      color: #1a1a1a;
      font-size: 1.8rem;
      margin-bottom: 1.5rem;
      font-weight: 700;
    }

    .bombers-subtitle {
      color: #666;
      font-size: 1.1rem;
      margin-top: 0.5rem;
    }

    .bombers-mode-selection {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
      margin: 2rem 0;
    }

    .bombers-mode-card {
      background: #f9fafb;
      border: 3px solid #e5e7eb;
      border-radius: 12px;
      padding: 2rem;
      cursor: pointer;
      transition: all 0.3s ease;
      text-align: center;
    }

    .bombers-mode-card:hover {
      border-color: #dc2626;
      transform: translateY(-4px);
      box-shadow: 0 8px 20px rgba(220, 38, 38, 0.15);
    }

    .bombers-mode-icon {
      font-size: 3rem;
      margin-bottom: 1rem;
    }

    .bombers-mode-title {
      font-size: 1.3rem;
      font-weight: 700;
      color: #1a1a1a;
      margin-bottom: 0.5rem;
    }

    .bombers-mode-description {
      color: #666;
      font-size: 0.95rem;
      line-height: 1.5;
    }

    .bombers-theme-selector {
      margin: 2rem 0;
    }

    .bombers-theme-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
      gap: 1rem;
      margin-top: 1rem;
    }

    .bombers-theme-checkbox {
      display: flex;
      align-items: center;
      background: #f9fafb;
      padding: 1rem;
      border-radius: 8px;
      border: 2px solid #e5e7eb;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .bombers-theme-checkbox:hover {
      border-color: #dc2626;
      background: #fef2f2;
    }

    .bombers-theme-checkbox input[type="checkbox"] {
      width: 1.2rem;
      height: 1.2rem;
      margin-right: 0.7rem;
      cursor: pointer;
      accent-color: #dc2626;
    }

    .bombers-theme-checkbox label {
      cursor: pointer;
      font-weight: 500;
      color: #333;
      flex: 1;
    }

    .bombers-theme-count {
      background: #dc2626;
      color: white;
      padding: 0.2rem 0.6rem;
      border-radius: 12px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-left: 0.5rem;
    }

    .bombers-btn {
      background: #dc2626;
      color: white;
      border: none;
      padding: 1rem 2.5rem;
      font-size: 1.1rem;
      font-weight: 700;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.3s ease;
      display: block;
      text-align: center;
      width: 100%;
      margin-top: 1.5rem;
    }

    .bombers-btn:hover:not(:disabled) {
      background: #b91c1c;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(220, 38, 38, 0.3);
    }

    .bombers-btn:disabled {
      background: #9ca3af;
      cursor: not-allowed;
    }

    .bombers-btn-secondary {
      background: #1a1a1a;
    }

    .bombers-btn-secondary:hover:not(:disabled) {
      background: #000;
    }

    .bombers-question-card {
      background: #f9fafb;
      border-radius: 12px;
      padding: 2rem;
      margin-bottom: 2rem;
    }

    .bombers-progress-bar {
      background: #e5e7eb;
      height: 8px;
      border-radius: 4px;
      margin-bottom: 1.5rem;
      overflow: hidden;
    }

    .bombers-progress-fill {
      background: linear-gradient(90deg, #dc2626 0%, #991b1b 100%);
      height: 100%;
      transition: width 0.3s ease;
    }

    .bombers-question-number {
      color: #dc2626;
      font-weight: 700;
      font-size: 0.95rem;
      margin-bottom: 1rem;
    }

    .bombers-question-text {
      font-size: 1.2rem;
      color: #1a1a1a;
      line-height: 1.6;
      margin-bottom: 1.5rem;
      font-weight: 600;
    }

    .bombers-options-list {
      list-style: none;
color: #1a1a1a;
      padding: 0;
      margin: 0;
    }

    .bombers-option-item {
      background: white;
      border: 2px solid #e5e7eb;
      border-radius: 8px;
      padding: 1rem 1.2rem;
      margin-bottom: 0.8rem;
      cursor: pointer;
      transition: all 0.2s ease;
      display: flex;
      align-items: center;
    }

    .bombers-option-item:hover {
      border-color: #dc2626;
      background: #fef2f2;
    }

    .bombers-option-item.selected {
      border-color: #dc2626;
      background: #fef2f2;
      font-weight: 600;
    }

    .bombers-option-item.correct {
      border-color: #16a34a;
      background: #f0fdf4;
    }

    .bombers-option-item.incorrect {
      border-color: #dc2626;
      background: #fef2f2;
    }

    .bombers-option-letter {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #dc2626;
      color: white;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      font-weight: 700;
      margin-right: 1rem;
      flex-shrink: 0;
    }

    .bombers-option-item.selected .bombers-option-letter {
      background: #991b1b;
    }

    .bombers-option-item.correct .bombers-option-letter {
      background: #16a34a;
    }

    .bombers-option-item.incorrect .bombers-option-letter {
      background: #dc2626;
    }

    .bombers-feedback-message {
      margin-top: 1rem;
      padding: 1rem;
      border-radius: 8px;
      font-weight: 600;
    }

    .bombers-feedback-message.correct {
      background: #f0fdf4;
      color: #16a34a;
      border: 2px solid #16a34a;
    }

    .bombers-feedback-message.incorrect {
      background: #fef2f2;
      color: #dc2626;
      border: 2px solid #dc2626;
    }

    .bombers-navigation-buttons {
      display: flex;
      gap: 1rem;
      margin-top: 2rem;
    }

    .bombers-navigation-buttons button {
      flex: 1;
    }

    .bombers-results-summary {
      text-align: center;
      margin: 2rem 0;
    }

    .bombers-score-display {
      font-size: 4rem;
      font-weight: 800;
      color: #dc2626;
      margin: 1rem 0;
    }

    .bombers-stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1rem;
      margin: 2rem 0;
    }

    .bombers-stat-card {
      background: #f9fafb;
      padding: 1.5rem;
      border-radius: 8px;
      text-align: center;
    }

    .bombers-stat-value {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      color: #6b7280;
    }

    .bombers-stat-value.correct {
      color: #16a34a;
    }

    .bombers-stat-value.incorrect {
      color: #dc2626;
    }

    .bombers-stat-value.blank {
      color: #6b7280;
    }

    .bombers-stat-label {
      color: #666;
      font-size: 0.95rem;
    }

    .bombers-review-section {
      margin-top: 3rem;
    }

    .bombers-review-item {
      background: #f9fafb;
      border-radius: 8px;
      padding: 1.5rem;
      margin-bottom: 1rem;
      border-left: 4px solid #dc2626;
    }

    .bombers-review-question {
      font-weight: 600;
      color: #1a1a1a;
      margin-bottom: 0.5rem;
    }

    .bombers-review-answer {
      margin: 0.5rem 0;
color: #1a1a1a;
      padding-left: 1rem;
    }

    .bombers-review-label {
      font-weight: 600;
      font-size: 0.9rem;
    }

    .bombers-review-label.your-answer {
      color: #dc2626;
    }

    .bombers-review-label.correct-answer {
      color: #16a34a;
    }






    @media (max-width: 768px) {
      .bombers-content-wrapper {
        padding: 1.5rem;
      }

      .bombers-h1 {
        font-size: 1.8rem;
      }

      .bombers-mode-selection {
        grid-template-columns: 1fr;
      }

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

      .bombers-navigation-buttons {
        flex-direction: column;
      }
    }
  
 @view-transition { navigation: auto; }