/* ==========================================================================
   animations.css — Keyframes, scroll-reveal, micro-interactions
   Levii Portal · Design System / Phase 1
   All motion is GPU-friendly (transform/opacity only) and honours
   prefers-reduced-motion via reset.css global override.
   ========================================================================== */

/* ---- Keyframes -------------------------------------------------------- */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translate3d(0, 24px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}

@keyframes float-slow {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-22px) rotate(1.5deg);
  }
}

@keyframes aurora-drift {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(-3%, 2%, 0) scale(1.08);
  }
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
}

@keyframes shimmer {
  0% {
    background-position: -160% 0;
  }
  100% {
    background-position: 260% 0;
  }
}

@keyframes pulse-ring {
  0% {
    box-shadow: 0 0 0 0 rgba(58, 134, 255, 0.4);
  }
  70% {
    box-shadow: 0 0 0 16px rgba(58, 134, 255, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(58, 134, 255, 0);
  }
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

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

/* ---- Scroll reveal (driven by IntersectionObserver in animations.js) --- */
[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 28px, 0);
  transition: opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  will-change: opacity, transform;
}
[data-reveal='left'] {
  transform: translate3d(-32px, 0, 0);
}
[data-reveal='right'] {
  transform: translate3d(32px, 0, 0);
}
[data-reveal='scale'] {
  transform: scale(0.92);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
}

/* Stagger children: set --stagger index on each child. */
[data-reveal-group].is-visible > * {
  animation: fade-up var(--dur-slow) var(--ease-out) both;
  animation-delay: calc(var(--stagger, 0) * 80ms);
}

/* ---- Reusable animation classes -------------------------------------- */
.animate-float {
  animation: float 6s var(--ease-in-out) infinite;
}
.animate-float-slow {
  animation: float-slow 9s var(--ease-in-out) infinite;
}
.animate-pulse-ring {
  animation: pulse-ring 2.4s var(--ease-out) infinite;
}

.gradient-animated {
  background-size: 220% 220%;
  animation: gradient-pan 12s var(--ease-in-out) infinite;
}

/* ---- Skeleton shimmer (loading states) ------------------------------- */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--surface-2);
  border-radius: var(--radius-md);
}
.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    color-mix(in srgb, var(--text) 6%, transparent) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
}

/* ---- Hover lift (cards, buttons) ------------------------------------- */
.lift {
  transition: transform var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}
@media (hover: hover) {
  .lift:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
  }
}

/* ---- Animated counter target ----------------------------------------- */
.counter {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}