/* Reset & Base */
  * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
  }
  
  :root {
      --primary: #2563eb;
      --primary-dark: #1e40af;
      --secondary: #0ea5e9;
      --dark: #0f172a;
      --gray: #64748b;
      --light-gray: #f1f5f9;
      --white: #ffffff;
      --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
      --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  }
  
  body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      color: var(--dark);
      line-height: 1.6;
      overflow-x: hidden;
  }
  
  .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
  }
  
  /* Header */
  .header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      transition: all 0.3s ease;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  }
  
  .header.scrolled {
      box-shadow: var(--shadow);
  }
  
  .header-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1.2rem 0;
  }
  
  .logo-text {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      text-decoration: none;
  }
  
  .nav {
      display: flex;
      gap: 2rem;
      align-items: center;
  }
  
  .nav-link {
      color: var(--dark);
      text-decoration: none;
      font-weight: 500;
      transition: color 0.3s ease;
      position: relative;
  }
  
  .nav-link:hover {
      color: var(--primary);
  }
  
  .nav-link::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s ease;
  }
  
  .nav-link:hover::after {
      width: 100%;
  }
  
  .mobile-menu-btn {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 5px;
  }
  
  .mobile-menu-btn span {
      width: 25px;
      height: 3px;
      background: var(--dark);
      transition: all 0.3s ease;
  }
  
  /* Hero Section */
  .hero {
      padding: 150px 0 100px;
      position: relative;
      overflow: hidden;
      background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
  }
  
  .hero-decoration {
      position: absolute;
      top: 0;
      right: 0;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
      border-radius: 50%;
  }
  
  .hero-content {
      max-width: 800px;
      position: relative;
      z-index: 1;
  }
  
  .hero-title {
      font-size: 3.5rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      color: var(--dark);
  }
  
  .highlight {
      color: var(--primary);
      position: relative;
  }
  
  .hero-subtitle {
      font-size: 1.25rem;
      color: var(--gray);
      margin-bottom: 2.5rem;
      max-width: 600px;
  }
  
  .hero-cta {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
  }
  
  /* Buttons */
  .btn {
      padding: 0.875rem 2rem;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
      font-size: 1rem;
  }
  
  .btn-primary {
      background: var(--primary);
      color: var(--white);
      box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
  }
  
  .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
  }
  
  .btn-secondary {
      background: var(--white);
      color: var(--primary);
      border: 2px solid var(--primary);
  }
  
  .btn-secondary:hover {
      background: var(--primary);
      color: var(--white);
  }
  
  /* Sections */
  section {
      padding: 80px 0;
  }
  
  .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 60px;
  }
  
  .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--dark);
  }
  
  .section-subtitle {
      font-size: 1.125rem;
      color: var(--gray);
  }
  
  /* Services */
  .services {
      background: var(--white);
  }
  
  .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 2rem;
  }
  
  .service-card {
      padding: 2.5rem;
      background: var(--white);
      border-radius: 12px;
      border: 2px solid var(--light-gray);
      transition: all 0.3s ease;
  }
  
  .service-card:hover {
      border-color: var(--primary);
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
  }
  
  .service-icon {
      font-size: 3rem;
      margin-bottom: 1.5rem;
  }
  
  .service-card h3 {
      font-size: 1.5rem;
      margin-bottom: 1rem;
      color: var(--dark);
  }
  
  .service-card p {
      color: var(--gray);
      line-height: 1.7;
  }
  
  /* Technologies */
  .technologies {
      background: var(--light-gray);
  }
  
  .tech-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
  }
  
  .tech-category {
      background: var(--white);
      padding: 2rem;
      border-radius: 12px;
      box-shadow: var(--shadow);
  }
  
  .tech-category h3 {
      font-size: 1.25rem;
      margin-bottom: 1.5rem;
      color: var(--dark);
  }
  
  .tech-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
  }
  
  .tech-tags span {
      padding: 0.5rem 1rem;
      background: var(--light-gray);
      color: var(--dark);
      border-radius: 6px;
      font-size: 0.875rem;
      font-weight: 500;
  }
  
  /* Projects */
  .projects {
      background: var(--white);
  }
  
  .projects-grid {
      min-height: 300px;
      display: flex;
      align-items: center;
      justify-content: center;
  }
  
  .project-placeholder {
      text-align: center;
      padding: 4rem 2rem;
      background: var(--light-gray);
      border-radius: 12px;
      width: 100%;
  }
  
  .project-placeholder p {
      font-size: 1.25rem;
      color: var(--gray);
  }
  
  /* Process */
  .process {
      background: var(--light-gray);
  }
  
  .process-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 2rem;
  }
  
  .process-step {
      text-align: center;
      padding: 2rem;
  }
  
  .step-number {
      width: 60px;
      height: 60px;
      background: var(--primary);
      color: var(--white);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 700;
      margin: 0 auto 1.5rem;
  }
  
  .process-step h3 {
      font-size: 1.25rem;
      margin-bottom: 1rem;
      color: var(--dark);
  }
  
  .process-step p {
      color: var(--gray);
  }
  
  /* Contact */
  .contact {
      background: var(--white);
  }
  
  .contact-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4rem;
      align-items: start;
  }
  
  .contact-info h2 {
      font-size: 2rem;
      margin-bottom: 1rem;
      color: var(--dark);
  }
  
  .contact-info p {
      color: var(--gray);
      margin-bottom: 2rem;
  }
  
  .contact-methods {
      display: flex;
      flex-direction: column;
      gap: 1rem;
  }
  
  .contact-item {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
  }
  
  .contact-item strong {
      color: var(--dark);
  }
  
  .contact-item a {
      color: var(--primary);
      text-decoration: none;
      font-size: 1.125rem;
  }
  
  .contact-item a:hover {
      text-decoration: underline;
  }
  
  /* Form */
  .contact-form {
      background: var(--light-gray);
      padding: 2.5rem;
      border-radius: 12px;
  }
  
  .form-group {
      margin-bottom: 1.5rem;
  }
  
  .form-group input,
  .form-group textarea {
      width: 100%;
      padding: 1rem;
      border: 2px solid #e2e8f0;
      border-radius: 8px;
      font-family: inherit;
      font-size: 1rem;
      transition: border-color 0.3s ease;
  }
  
  .form-group input:focus,
  .form-group textarea:focus {
      outline: none;
      border-color: var(--primary);
  }
  
  .form-group textarea {
      resize: vertical;
  }
  
  /* Footer */
  .footer {
      background: var(--dark);
      color: var(--white);
      padding: 4rem 0 2rem;
  }
  
  .footer-content {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 4rem;
      margin-bottom: 3rem;
  }
  
  .footer-brand p {
      color: var(--gray);
      margin-top: 1rem;
  }
  
  .footer-links {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
  }
  
  .footer-column h4 {
      margin-bottom: 1rem;
      color: var(--white);
  }
  
  .footer-column a {
      display: block;
      color: var(--gray);
      text-decoration: none;
      margin-bottom: 0.5rem;
      transition: color 0.3s ease;
  }
  
  .footer-column a:hover {
      color: var(--white);
  }
  
  .footer-bottom {
      padding-top: 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      text-align: center;
      color: var(--gray);
  }
  
  /* Responsive */
  @media (max-width: 768px) {
      .nav {
          position: fixed;
          top: 70px;
          left: 0;
          right: 0;
          background: var(--white);
          flex-direction: column;
          padding: 2rem;
          box-shadow: var(--shadow);
          transform: translateY(-100%);
          opacity: 0;
          transition: all 0.3s ease;
      }
  
      .nav.active {
          transform: translateY(0);
          opacity: 1;
      }
  
      .mobile-menu-btn {
          display: flex;
      }
  
      .mobile-menu-btn.active span:nth-child(1) {
          transform: rotate(45deg) translate(5px, 5px);
      }
  
      .mobile-menu-btn.active span:nth-child(2) {
          opacity: 0;
      }
  
      .mobile-menu-btn.active span:nth-child(3) {
          transform: rotate(-45deg) translate(7px, -7px);
      }
  
      .hero-title {
          font-size: 2.5rem;
      }
  
      .hero-subtitle {
          font-size: 1.125rem;
      }
  
      .section-title {
          font-size: 2rem;
      }
  
      .contact-content,
      .footer-content {
          grid-template-columns: 1fr;
          gap: 2rem;
      }
  
      .services-grid,
      .tech-grid,
      .process-steps {
          grid-template-columns: 1fr;
      }
  }