/* Animation Utilities */

/* Flow animation for attribution diagram */
@keyframes flow {
  0% {
    background-position: -100% 0;
    opacity: 0.3;
  }
  50% {
    opacity: 1;
  }
  100% {
    background-position: 100% 0;
    opacity: 0.3;
  }
}

.flow-line {
  width: 40px;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgb(37, 99, 235) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: flow 2s ease-in-out infinite;
  opacity: 0.6;
}

.flow-line[data-delay="0"] { animation-delay: 0ms; }
.flow-line[data-delay="200"] { animation-delay: 200ms; }
.flow-line[data-delay="400"] { animation-delay: 400ms; }
.flow-line[data-delay="600"] { animation-delay: 600ms; }
.flow-line[data-delay="800"] { animation-delay: 800ms; }

/* Slow pulse for hub elements */
@keyframes pulse-slow {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.02);
    opacity: 0.95;
  }
}

.animate-pulse-slow {
  animation: pulse-slow 3s ease-in-out infinite;
}

/* Fade in on scroll */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fade-in-up 0.6s ease-out;
}

/* Scroll-triggered animations via Intersection Observer */
.scroll-animate {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.scroll-animate.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delay for multiple items */
.scroll-animate:nth-child(1) { transition-delay: 0ms; }
.scroll-animate:nth-child(2) { transition-delay: 100ms; }
.scroll-animate:nth-child(3) { transition-delay: 200ms; }
.scroll-animate:nth-child(4) { transition-delay: 300ms; }
.scroll-animate:nth-child(5) { transition-delay: 400ms; }
.scroll-animate:nth-child(6) { transition-delay: 500ms; }

/* Parallax effect (subtle movement on scroll) */
.parallax-slow {
  will-change: transform;
}

/* Floating animation for decorative elements */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

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