:root {
      --color-primary: #0ea5e9;
      --color-primary-dark: #0284c7;
      --color-secondary: #10b981;
      --color-dark: #0f172a;
      --color-dark-light: #1e293b;
      --color-gray: #64748b;
      --color-light: #f8fafc;
      --color-white: #ffffff;
      --color-accent: #f59e0b;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
      --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
      --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  }

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

  body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      line-height: 1.6;
      color: var(--color-dark);
      background-color: var(--color-white);
  }

  /* Header & Navigation */
  .header {
      background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
      color: var(--color-white);
      padding: 1rem 0;
      position: fixed;
      width: 100%;
      top: 0;
      z-index: 1000;
      box-shadow: var(--shadow-md);
  }

  .nav-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
  }

  .logo {
      font-size: 1.5rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 0.5rem;
  }

  .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
      align-items: center;
  }

  .nav-links a {
      color: var(--color-white);
      text-decoration: none;
      font-weight: 500;
      transition: opacity 0.3s;
  }

  .nav-links a:hover {
      opacity: 0.8;
  }

  .cta-button {
      background: var(--color-secondary);
      color: var(--color-white);
      padding: 0.75rem 1.5rem;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      transition: transform 0.3s, box-shadow 0.3s;
      display: inline-block;
  }

  .cta-button:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
  }

  /* Hero Section */
  .hero {
      background: linear-gradient(rgba(14, 164, 233, 0.574), rgba(2, 132, 199, 0.9)), url('./img/hero.jpg');
      background-size: cover;
      background-position: top center;
      color: var(--color-white);
      padding: 8rem 1.5rem 6rem;
      margin-top: 4rem;
      text-align: center;
      height: 100vh;
  }

  .hero-content {
      max-width: 800px;
      margin: 0 auto;
  }

  .hero h1 {
      font-size: 3rem;
      font-weight: 700;
      margin-bottom: 1.5rem;
      line-height: 1.2;
  }

  .hero-highlight {
      color: var(--color-accent);
  }

  .hero p {
      font-size: 1.25rem;
      margin-bottom: 2rem;
      opacity: 0.95;
  }

  .hero-buttons {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap;
  }

  .btn-primary {
      background: var(--color-secondary);
      color: var(--color-white);
      padding: 1rem 2rem;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      font-size: 1.1rem;
      transition: all 0.3s;
      border: none;
      cursor: pointer;
  }

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

  .btn-secondary {
      background: var(--color-white);
      color: var(--color-primary);
      padding: 1rem 2rem;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      font-size: 1.1rem;
      transition: all 0.3s;
  }

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

  /* Features Section */
  .features {
      padding: 5rem 1.5rem;
      background: var(--color-light);
  }

  .container {
      max-width: 1200px;
      margin: 0 auto;
  }

  .section-title {
      text-align: center;
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--color-dark);
  }

  .section-subtitle {
      text-align: center;
      font-size: 1.2rem;
      color: var(--color-gray);
      margin-bottom: 3rem;
  }

  .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
      margin-top: 3rem;
  }

  .feature-card {
      background: var(--color-white);
      padding: 2rem;
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
      text-align: center;
  }

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

  .feature-icon {
      width: 60px;
      height: 60px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.5rem;
      font-size: 1.8rem;
  }

  .feature-card h3 {
      font-size: 1.3rem;
      margin-bottom: 0.75rem;
      color: var(--color-dark);
  }

  .feature-card p {
      color: var(--color-gray);
      line-height: 1.6;
  }

  /* Services Section */
  .services {
      padding: 5rem 1.5rem;
      background: var(--color-white);
  }

  .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 2rem;
      margin-top: 3rem;
  }

  .service-card {
      background: var(--color-light);
      padding: 2.5rem;
      border-radius: 12px;
      border-left: 4px solid var(--color-primary);
      transition: all 0.3s;
  }

  .service-card:hover {
      border-left-color: var(--color-secondary);
      box-shadow: var(--shadow-md);
  }

  .service-card h3 {
      font-size: 1.5rem;
      margin-bottom: 1rem;
      color: var(--color-dark);
  }

  .service-list {
      list-style: none;
  }

  .service-list li {
      padding: 0.5rem 0;
      color: var(--color-gray);
      display: flex;
      align-items: center;
      gap: 0.5rem;
  }

  .service-list li::before {
      content: "✓";
      color: var(--color-secondary);
      font-weight: 700;
      font-size: 1.2rem;
  }

  /* Why Choose Us */
  .why-choose {
      padding: 5rem 1.5rem;
      background: linear-gradient(135deg, var(--color-dark), var(--color-dark-light));
      color: var(--color-white);
  }

  .why-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 2rem;
      margin-top: 3rem;
  }

  .why-item {
      text-align: center;
      padding: 1.5rem;
  }

  .why-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--color-accent);
      margin-bottom: 0.5rem;
  }

  .why-item h4 {
      font-size: 1.2rem;
      margin-bottom: 0.5rem;
  }

  .why-item p {
      opacity: 0.9;
  }

  /* Pricing Section */
  .pricing {
      padding: 5rem 1.5rem;
      background: var(--color-light);
  }

  .pricing-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
      margin-top: 3rem;
  }

  .pricing-card {
      background: var(--color-white);
      padding: 2.5rem;
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all 0.3s;
  }

  .pricing-card.featured {
      border: 3px solid var(--color-primary);
      transform: scale(1.05);
  }

  .pricing-card:hover {
      transform: translateY(-5px) scale(1.02);
      box-shadow: var(--shadow-lg);
  }

  .pricing-badge {
      background: var(--color-secondary);
      color: var(--color-white);
      padding: 0.5rem 1rem;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 1rem;
  }

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

  .pricing-price {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 1.5rem;
  }

  .pricing-features {
      list-style: none;
      margin-bottom: 2rem;
      text-align: left;
  }

  .pricing-features li {
      padding: 0.75rem 0;
      color: var(--color-gray);
      display: flex;
      align-items: center;
      gap: 0.5rem;
  }

  .pricing-features li::before {
      content: "✓";
      color: var(--color-secondary);
      font-weight: 700;
  }

  /* Testimonials */
  .testimonials {
      padding: 5rem 1.5rem;
      background: var(--color-white);
  }

  .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 2rem;
      margin-top: 3rem;
  }

  .testimonial-card {
      background: var(--color-light);
      padding: 2rem;
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
  }

  .testimonial-text {
      font-style: italic;
      margin-bottom: 1.5rem;
      color: var(--color-gray);
      line-height: 1.8;
  }

  .testimonial-author {
      display: flex;
      align-items: center;
      gap: 1rem;
  }

  .author-avatar {
      width: 50px;
      height: 50px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-white);
      font-weight: 700;
      font-size: 1.2rem;
  }

  .author-info h5 {
      font-weight: 600;
      color: var(--color-dark);
  }

  .author-info p {
      font-size: 0.9rem;
      color: var(--color-gray);
  }

  .rating {
      color: var(--color-accent);
      margin-top: 0.5rem;
  }

  /* CTA Section */
  .cta-section {
      padding: 5rem 1.5rem;
      background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
      color: var(--color-white);
      text-align: center;
  }

  .cta-section h2 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
  }

  .cta-section p {
      font-size: 1.2rem;
      margin-bottom: 2rem;
      opacity: 0.95;
  }

  /* Contact Section */
  .contact {
      padding: 5rem 1.5rem;
      background: var(--color-light);
  }

  .contact-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 3rem;
      margin-top: 3rem;
  }

  .contact-info {
      background: var(--color-white);
      padding: 2rem;
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
  }

  .contact-item {
      display: flex;
      align-items: start;
      gap: 1rem;
      margin-bottom: 1.5rem;
  }

  .contact-icon {
      width: 40px;
      height: 40px;
      background: var(--color-primary);
      color: var(--color-white);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
  }

  .contact-details h4 {
      margin-bottom: 0.25rem;
      color: var(--color-dark);
  }

  .contact-details p {
      color: var(--color-gray);
  }

  .contact-details a {
      color: var(--color-primary);
      text-decoration: none;
      font-weight: 600;
  }

  .contact-form {
      background: var(--color-white);
      padding: 2rem;
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
  }

  .form-group {
      margin-bottom: 1.5rem;
  }

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

  .form-group input,
  .form-group textarea,
  .form-group select {
      width: 100%;
      padding: 0.75rem;
      border: 2px solid #e2e8f0;
      border-radius: 8px;
      font-family: inherit;
      font-size: 1rem;
      transition: border-color 0.3s;
  }

  .form-group input:focus,
  .form-group textarea:focus,
  .form-group select:focus {
      outline: none;
      border-color: var(--color-primary);
  }

  .form-group textarea {
      resize: vertical;
      min-height: 120px;
  }

  /* Footer */
  .footer {
      background: var(--color-dark);
      color: var(--color-white);
      padding: 3rem 1.5rem 1.5rem;
  }

  .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 2rem;
      margin-bottom: 2rem;
  }

  .footer-section h3 {
      margin-bottom: 1rem;
      color: var(--color-white);
  }

  .footer-section p,
  .footer-section a {
      color: rgba(255, 255, 255, 0.8);
      text-decoration: none;
      line-height: 2;
  }

  .footer-section a:hover {
      color: var(--color-primary);
  }

  .footer-links {
      list-style: none;
  }

  .footer-bottom {
      text-align: center;
      padding-top: 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      color: rgba(255, 255, 255, 0.7);
  }

  /* Mobile Menu */
  .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: var(--color-white);
      font-size: 1.5rem;
      cursor: pointer;
  }

  /* Responsive */
  @media (max-width: 768px) {
      .mobile-menu-btn {
          display: block;
      }

      .nav-links {
          display: none;
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background: var(--color-primary-dark);
          flex-direction: column;
          padding: 1rem;
          box-shadow: var(--shadow-md);
      }

      .nav-links.active {
          display: flex;
      }

      .hero h1 {
          font-size: 2rem;
      }

      .hero p {
          font-size: 1rem;
      }

      .section-title {
          font-size: 2rem;
      }

      .hero-buttons {
          flex-direction: column;
      }

      .pricing-card.featured {
          transform: scale(1);
      }

      /* Logo mobile fix */
      .logo {
          font-size: 1.25rem;
      }
  }

  @media (max-width: 480px) {
      .hero h1 {
          font-size: 1.5rem;
      }

      .btn-primary,
      .btn-secondary {
          padding: 0.75rem 1.5rem;
          font-size: 1rem;
      }

      /* Logo mobile fix */
      .logo {
          font-size: 1.1rem;
      }
  }

  /* Animations */
  @keyframes fadeInUp {
      from {
          opacity: 0;
          transform: translateY(30px);
      }

      to {
          opacity: 1;
          transform: translateY(0);
      }
  }

  .fade-in-up {
      animation: fadeInUp 0.6s ease-out;
  }

  /* Schema.org structured data helper */
  .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
  }