/* Keyframes + reusable motion classes. Hand-written, no animation library. */

@keyframes fade-in {
  from {
    opacity: 0;
  }
}

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) translateX(0);
  }
  50% {
    transform: translateY(-16px) translateX(6px);
  }
}

@keyframes float-slow {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-22px) rotate(4deg);
  }
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes blob-morph {
  0%,
  100% {
    border-radius: 42% 58% 65% 35% / 45% 40% 60% 55%;
    transform: rotate(0deg) scale(1);
  }
  33% {
    border-radius: 60% 40% 35% 65% / 55% 65% 35% 45%;
    transform: rotate(8deg) scale(1.04);
  }
  66% {
    border-radius: 35% 65% 55% 45% / 40% 35% 65% 60%;
    transform: rotate(-6deg) scale(0.98);
  }
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.55;
    transform: scale(1);
  }
  50% {
    opacity: 0.95;
    transform: scale(1.06);
  }
}

@keyframes shimmer {
  from {
    background-position: -200% 0;
  }
  to {
    background-position: 200% 0;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes bounce-y {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(8px);
  }
}

@keyframes ripple-out {
  from {
    transform: scale(0);
    opacity: 0.45;
  }
  to {
    transform: scale(2.6);
    opacity: 0;
  }
}

@keyframes button-shine {
  from {
    transform: translateX(-120%) skewX(-15deg);
  }
  to {
    transform: translateX(220%) skewX(-15deg);
  }
}

/* Scroll reveal — toggled by IntersectionObserver in src/animations/scrollReveal.js */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
    transform var(--duration-slow) var(--ease-out-expo);
  transition-delay: calc(var(--reveal-index, 0) * 70ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface) 25%,
    var(--color-surface-hover) 50%,
    var(--color-surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s ease-in-out infinite;
  border-radius: var(--radius-sm);
}