/* Animations */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-15px); }
  100% { transform: translateY(0px); }
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 0 0 rgba(0, 123, 255, 0.4); }
  70% { box-shadow: 0 0 0 15px rgba(0, 123, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 123, 255, 0); }
}

.animate-fade-up {
  animation: fadeInUp 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
  opacity: 0;
}

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }

.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-pulse-btn {
  animation: pulse-glow 2s infinite;
}

/* Hover effect on stack cards */
.stack-layer {
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.stack-layer:hover {
  transform: translateY(-10px) scale(1.02);
  z-index: 10;
}