/* ==========================================================================
   ANIMATIONS.CSS — Keyframes, scroll-reveal, micro-interactions
   Optimized: only transform/opacity are animated (GPU-friendly)
   ========================================================================== */

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes pulseRing {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5); }
  70% { box-shadow: 0 0 0 14px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

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

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-float { animation: floatY 5s ease-in-out infinite; }
.animate-pulse-ring { animation: pulseRing 2.4s infinite; }

/* Simple scroll-reveal fallback (works with IntersectionObserver in scroll.js) */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out-back),
    transform var(--duration-slow) var(--ease-out-back);
}

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

[data-reveal="fade"] { transform: none; }

[data-reveal-delay="1"] { transition-delay: 80ms; }
[data-reveal-delay="2"] { transition-delay: 160ms; }
[data-reveal-delay="3"] { transition-delay: 240ms; }
[data-reveal-delay="4"] { transition-delay: 320ms; }
[data-reveal-delay="5"] { transition-delay: 400ms; }
[data-reveal-delay="6"] { transition-delay: 480ms; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .animate-float, .animate-pulse-ring { animation: none; }
}

/* AOS-style attribute support (loaded via CDN AOS lib, fine-tuned durations) */
[data-aos] { transition-duration: 600ms !important; }

/* Loading skeleton shimmer for perceived performance */
.skeleton {
  background: linear-gradient(90deg, var(--surface-alt) 25%, var(--border-subtle) 37%, var(--surface-alt) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-md);
}

/* Page load fade */
.js-loaded body,
body.js-loaded {
  animation: fadeIn var(--duration-slow) var(--ease-standard);
}