:root {
    --primary: #4a6da7;
    --primary-dark: #345089;
    --secondary: #f27a54;
    --secondary-dark: #e05c34;
    --text-dark: #333333;
    --text-light: #ffffff;
    --text-medium: #666666;
    --background-light: #f8f9fa;
    --background-medium: #e9ecef;
    --border-color: #dee2e6;
    --success: #28a745;
    --error: #dc3545;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
  }

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

  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
  }

  section {
    padding: 80px 0;
    position: relative;
  }

  h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 700;
    line-height: 1.2;
  }

  h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  }

  h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
  }

  h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
  }

  p {
    margin-bottom: 1.5rem;
    line-height: 1.6;
    color: var(--text-medium);
  }

  .subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-light);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  }

  .section-intro {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto 3rem;
    text-align: center;
    color: var(--gray-700);
  }

  .bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    opacity: 0.1;
  }

  /* Buttons */
  .btn-primary, .btn-secondary {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 4px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
  }

  .btn-primary {
    background-color: var(--primary);
    color: var(--text-light);
    box-shadow: 0 4px 6px rgba(74, 109, 167, 0.2);
  }

  .btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(74, 109, 167, 0.3);
  }

  .btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
  }

  .btn-secondary:hover {
    background-color: rgba(74, 109, 167, 0.1);
    color: var(--primary-dark);
    border-color: var(--primary-dark);
  }

  /* Hero Section */
  .hero-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    background-color: var(--primary);
    color: var(--text-light);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
  }

  .hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(74, 109, 167, 0.9) 0%, rgba(52, 80, 137, 0.8) 100%);
    z-index: 0;
  }

  .hero-description {
    max-width: 600px;
    margin-bottom: 2rem;
  }

  .hero-description p {
    color: var(--text-light);
    font-size: 1.2rem;
    margin-bottom: 2rem;
  }

  /* Collection Section */
  .collection-section {
    background-color: var(--background-light);
  }

  .collection-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 30px;
    margin-top: 3rem;
  }

  .collection-item {
    background-color: var(--text-light);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .collection-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  }

  .collection-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
  }

  .collection-item h3, .collection-item p, .collection-item a {
    padding: 0 20px;
  }

  .collection-item h3 {
    margin-top: 20px;
    color: var(--primary);
  }

  .collection-item p {
    margin-bottom: 20px;
  }

  .collection-item a {
    display: inline-block;
    margin: 0 20px 20px;
  }

  /* Lens Technology Section */
  .lens-technology-section {
    background-color: var(--gray-100);
    position: relative;
  }

  .technology-features {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 30px;
    margin-top: 3rem;
  }

  .feature {
    background-color: var(--text-light);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
  }

  .feature:hover {
    transform: translateY(-5px);
  }

  .feature i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
  }

  .feature h3 {
    color: var(--primary);
  }

  /* Fitting Process Section */
  .fitting-process-section {
    background-color: var(--text-light);
  }

  .process-steps {
    max-width: 800px;
    margin: 0 auto;
  }

  .step {
    display: flex;
    margin-bottom: 2rem;
    align-items: flex-start;
  }

  .step:last-child {
    margin-bottom: 0;
  }

  .step-number {
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-right: 20px;
    flex-shrink: 0;
  }

  .step-content {
    flex-grow: 1;
  }

  .step-content h3 {
    margin-top: 0.5rem;
    color: var(--primary);
  }

  /* Testimonials Section */
  .testimonials-section {
    background-color: var(--gray-100);
    position: relative;
  }

  .testimonials-slider {
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
  }

  .testimonial {
    background-color: var(--text-light);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    margin: 10px;
  }

  .testimonial-content p {
    font-style: italic;
    margin-bottom: 20px;
    color: var(--gray-700);
  }

  .testimonial-author {
    display: flex;
    align-items: center;
  }

  .testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
  }

  .testimonial-author h4 {
    margin-bottom: 0.25rem;
    color: var(--primary);
  }

  .testimonial-author p {
    margin-bottom: 0;
    font-size: 0.9rem;
    color: var(--gray-600);
  }

  .testimonial-controls {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
  }

  .testimonial-controls button {
    background-color: var(--primary);
    color: var(--text-light);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    margin: 0 10px;
    transition: background-color 0.3s ease;
  }

  .testimonial-controls button:hover {
    background-color: var(--primary-dark);
  }

  /* CTA Section */
  .cta-section {
    background-color: var(--primary);
    color: var(--text-light);
    text-align: center;
  }

  .cta-section h2, .cta-section p {
    color: var(--text-light);
  }

  .appointment-form {
    max-width: 800px;
    margin: 3rem auto 0;
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 20px;
    text-align: left;
  }

  .form-group {
    margin-bottom: 1rem;
  }

  .form-group.full-width {
    grid-column: 1 / -1;
  }

  .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-light);
    font-weight: 600;
  }

  .form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
  }

  .form-group textarea {
    resize: vertical;
  }

  .appointment-form .btn-primary {
    grid-column: 1 / -1;
    justify-self: center;
    margin-top: 1rem;
    background-color: var(--secondary);
    color: var(--text-light);
  }

  .appointment-form .btn-primary:hover {
    background-color: var(--secondary-dark);
  }

  /* Screen Reader Only */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
  }

  /* Responsive Styles */
  @media (min-width: 768px) {
    .collection-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    
    .technology-features {
      grid-template-columns: repeat(2, 1fr);
    }
    
    .appointment-form {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (min-width: 1024px) {
    .collection-grid {
      grid-template-columns: repeat(4, 1fr);
    }
    
    .technology-features {
      grid-template-columns: repeat(4, 1fr);
    }
  }