.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-glow {
  background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(13, 148, 136, 0.25), transparent 60%),
              radial-gradient(ellipse 60% 40% at 80% 20%, rgba(34, 211, 238, 0.12), transparent 50%);
}

.grid-pattern {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
}

.btn-primary {
  box-shadow: 0 4px 14px 0 rgba(13, 148, 136, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px 0 rgba(13, 148, 136, 0.45);
}

#navbar.scrolled {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}