:root {
    --primary-color: #00FF66;
    --primary-light: #b8ffb8;
    --dark-color: #121212;
    --text-color: #333;
    --light-text: #666;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    
    font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
    line-height: 1.5;
    font-weight: 400;
    
    color-scheme: light;
    color: var(--text-color);
    background-color: var(--white);
    
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    min-width: 320px;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }
  
  /* Header */
  header {
    background: linear-gradient(135deg, var(--dark-color) 0%, #2a2a2a 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
  }
  
  header h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--primary-color), #a0ff9d);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
  }
  
  header p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
  }
  
  /* Form Section */
  .quiz-form {
    padding: 80px 0;
  }
  
  .form-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow);
  }
  
  .form-container h2 {
    margin-bottom: 24px;
    text-align: center;
    font-size: 1.8rem;
  }
  
  .form-group {
    margin-bottom: 20px;
  }
  
  .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
  }
  
  .form-group input,
  .form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
  }
  
  .form-group input:focus,
  .form-group select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 255, 102, 0.2);
  }
  
  /* Button Styles */
  .cta-button {
    background: var(--primary-color);
    color: black;
    padding: 12px 24px;
    border-radius: 24px;
    text-decoration: none;
    font-weight: 500;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    width: 100%;
    text-align: center;
  }
  
  .cta-button:hover {
    background: #00e65c;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
  }
  
  .cta-button.secondary {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--text-color);
    margin-top: 12px;
  }
  
  .cta-button.secondary:hover {
    background: rgba(0, 255, 102, 0.1);
  }
  
  /* Loading Section */
  .loading-section {
    padding: 80px 0;
    display: none;
  }
  
  .loading-container {
    text-align: center;
  }
  
  .loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(0, 255, 102, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 20px;
  }
  
  @keyframes spin {
    to { transform: rotate(360deg); }
  }
  
  /* Quiz Section */
  .quiz-section {
    padding: 80px 0;
    display: none;
  }
  
  .quiz-header {
    text-align: center;
    margin-bottom: 40px;
  }
  
  .quiz-header h2 {
    font-size: 2rem;
    margin-bottom: 8px;
  }
  
  .quiz-header p {
    color: var(--light-text);
  }
  
  .question-card {
    background: var(--white);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
  }
  
  .question-card.visible {
    opacity: 1;
    transform: translateY(0);
  }
  
  .question-number {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 8px;
  }
  
  .question-text {
    font-size: 1.2rem;
    margin-bottom: 16px;
    font-weight: 500;
  }
  
  .options-list {
    list-style: none;
  }
  
  .option-item {
    margin-bottom: 12px;
  }
  
  .option-label {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
  }
  
  .option-label:hover {
    background-color: rgba(0, 255, 102, 0.05);
  }
  
  .option-radio {
    margin-right: 12px;
    accent-color: var(--primary-color);
  }
  
  .quiz-controls {
    display: flex;
    flex-direction: column;
    max-width: 400px;
    margin: 40px auto 0;
  }
  
  /* Results Section */
  .results-section {
    padding: 80px 0;
    display: none;
  }
  
  .results-container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    text-align: center;
  }
  
  .results-container h2 {
    margin-bottom: 24px;
    font-size: 2rem;
  }
  
  .score-display {
    margin-bottom: 32px;
  }
  
  .score-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), #a0ff9d);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto 16px;
    color: var(--dark-color);
  }
  
  #scorePercentage {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
  }
  
  .result-item {
    text-align: left;
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
  }
  
  .result-item.correct {
    background-color: rgba(0, 255, 102, 0.1);
  }
  
  .result-item.incorrect {
    background-color: rgba(255, 0, 0, 0.05);
  }
  
  .result-icon {
    font-size: 1.2rem;
    margin-top: 2px;
  }
  
  .result-icon.correct {
    color: var(--primary-color);
  }
  
  .result-icon.incorrect {
    color: #ff3333;
  }
  
  .result-content {
    flex: 1;
  }
  
  .result-question {
    font-weight: 500;
    margin-bottom: 8px;
  }
  
  .result-answer {
    margin-bottom: 4px;
  }
  
  .correct-answer {
    color: var(--primary-color);
    font-weight: 500;
  }
  
  #resultsBreakdown {
    margin-bottom: 32px;
    max-height: 400px;
    overflow-y: auto;
    margin-top: 24px;
  }
  
  /* Features Section */
  .features {
    background: var(--primary-light);
    padding: 80px 0;
  }
  
  .features h2 {
    text-align: center;
    margin-bottom: 48px;
    font-size: 2rem;
  }
  
  .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
  }
  
  .features-grid.visible {
    opacity: 1;
    transform: translateY(0);
  }
  
  .feature {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 24px;
    border-radius: 16px;
    box-shadow: var(--shadow);
  }
  
  .feature-icon {
    background: var(--primary-color);
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--dark-color);
  }
  
  .feature-content h3 {
    margin-bottom: 8px;
  }
  
  /* Testimonials Section */
  .testimonials {
    padding: 80px 0;
    text-align: center;
  }
  
  .testimonials h2 {
    margin-bottom: 48px;
    font-size: 2rem;
  }
  
  .testimonials-slider {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding: 20px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }
  
  .testimonial-card {
    min-width: 280px;
    background: white;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    scroll-snap-align: start;
    opacity: 0;
    transform: translateX(20px);
    transition: all 0.6s ease-out;
  }
  
  .testimonial-card.visible {
    opacity: 1;
    transform: translateX(0);
  }
  
  .testimonial-content {
    margin-bottom: 16px;
  }
  
  .testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: center;
  }
  
  .author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
  }
  
  .author-name {
    font-weight: 600;
  }
  
  .author-title {
    font-size: 0.9rem;
    color: var(--light-text);
  }
  
  /* Footer */
  footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 24px 0;
    text-align: center;
  }
  
  /* Responsive Styles */
  @media (max-width: 768px) {
    header {
      padding: 60px 0;
    }
    
    header h1 {
      font-size: 2.5rem;
    }
    
    .form-container,
    .results-container {
      padding: 24px;
    }
    
    .features-grid {
      grid-template-columns: 1fr;
    }
    
    .testimonials-slider {
      padding-bottom: 40px;
    }
  }
  
  /* Animation for scroll reveal */
  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .animate-on-scroll {
    opacity: 0;
  }
  
  .animate-on-scroll.animated {
    animation: fadeInUp 0.6s ease forwards;
  }