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

body {
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.6;
  color: #333;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  background: #f59e0b;
  border-radius: 0.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.logo-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.brand-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: black;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: rgba(0, 0, 0, 0.8);
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: black;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 5rem;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  color: black;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: rgba(0, 0, 0, 0.8);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.btn-primary {
  background: black;
  color: white;
  padding: 0.875rem 2rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-block;
}

.btn-primary:hover {
  background: rgba(0, 0, 0, 0.8);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: black;
  padding: 0.875rem 2rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-icon {
  width: 1rem;
  height: 1rem;
}

/* Sections */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: #f59e0b;
}

.section-title-black {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: black;
}

/* Research Section */
.research-section {
  background: white;
}

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

.research-card {
  background: #fffbeb;
  padding: 2rem;
  border-radius: 1rem;
  text-align: center;
  transition: transform 0.3s ease;
  border: 1px solid #fef3c7;
}

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

.card-icon {
  width: 4rem;
  height: 4rem;
  background: #f59e0b;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: white;
}

.card-icon svg {
  width: 2rem;
  height: 2rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #92400e;
}

.card-description {
  color: #78716c;
  line-height: 1.6;
}

/* Technology Section */
.technology-section {
  background: #f9fafb;
}

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

.tech-item {
  background: white;
  padding: 2rem;
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.tech-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.tech-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #1f2937;
}

.tech-description {
  color: #6b7280;
  line-height: 1.6;
}

/* Contact Section */
.contact-section {
  background: white;
}

.contact-description {
  text-align: center;
  font-size: 1.125rem;
  color: #6b7280;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.125rem;
  color: #374151;
}

.contact-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: #f59e0b;
}

/* Footer */
.footer {
  background: #1f2937;
  color: white;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand .logo-icon {
  background: #f59e0b;
}

.footer-brand .brand-text {
  color: white;
}

.footer-text {
  color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

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

  .nav-links {
    gap: 1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .contact-info {
    flex-direction: column;
    gap: 1.5rem;
  }

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

@media (max-width: 480px) {
  .nav-container {
    padding: 0 1rem;
  }

  .section-container {
    padding: 3rem 1rem;
  }

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

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