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

:root {
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --secondary-color: #64748b;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-white);
  font-size: 16px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

header {
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

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

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

.nav-links a:hover {
  color: var(--primary-color);
}

.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 6rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hero .subtitle {
  font-size: 1.5rem;
  font-weight: 300;
  margin-bottom: 1rem;
  opacity: 0.95;
}

.hero .tagline {
  font-size: 1.125rem;
  max-width: 700px;
  margin: 0 auto 2rem;
  opacity: 0.9;
  line-height: 1.7;
}

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

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  font-size: 1rem;
}

.btn-primary {
  background-color: white;
  color: var(--primary-color);
}

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

.btn-secondary {
  background-color: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background-color: white;
  color: var(--primary-color);
}

section {
  padding: 5rem 0;
}

section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
  text-align: center;
}

.section-intro {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 3rem;
}

.about {
  background-color: var(--bg-light);
}

.about-content p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.tech-stack {
  margin-top: 3rem;
}

.tech-stack h3 {
  font-size: 1.75rem;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--text-primary);
}

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

.tech-category {
  background-color: var(--bg-white);
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.tech-category:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.tech-category h4 {
  font-size: 1.125rem;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.tech-category p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.services {
  background-color: var(--bg-white);
}

.service-benefits {
  margin-bottom: 3rem;
}

.service-benefits h3,
.use-cases h3 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.benefits-list {
  list-style: none;
  max-width: 900px;
  margin: 0 auto;
}

.benefits-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 1.0625rem;
}

.benefits-list li:last-child {
  border-bottom: none;
}

.benefits-list strong {
  color: var(--primary-color);
  font-weight: 600;
}

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

.case-card {
  background-color: var(--bg-light);
  padding: 2rem;
  border-radius: 0.5rem;
  border-left: 4px solid var(--primary-color);
  transition: var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.case-card h4 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.case-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.projects {
  background-color: var(--bg-light);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.project-card {
  background-color: var(--bg-white);
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.project-card h3 {
  font-size: 1.375rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-weight: 600;
}

.project-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.project-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  transition: var(--transition);
}

.project-link:hover {
  color: var(--primary-dark);
  gap: 0.5rem;
}

.contact {
  background-color: var(--bg-white);
}

.contact-intro {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
}

.contact-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background-color: var(--bg-light);
  border-radius: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
  border: 2px solid transparent;
}

.contact-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.contact-card svg {
  flex-shrink: 0;
  color: var(--primary-color);
}

.contact-card span {
  font-weight: 500;
}

footer {
  background-color: var(--text-primary);
  color: white;
  padding: 2rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a {
  color: white;
  text-decoration: none;
  margin-left: 1.5rem;
  transition: var(--transition);
}

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

@media (max-width: 768px) {
  .nav-links {
    gap: 1rem;
    font-size: 0.9rem;
  }

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

  .hero .subtitle {
    font-size: 1.25rem;
  }

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

  section {
    padding: 3rem 0;
  }

  section h2 {
    font-size: 2rem;
  }

  .tech-grid,
  .cases-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links a {
    margin-left: 0;
    margin-top: 0.5rem;
  }
}

@media (max-width: 480px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding: 4rem 0;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}