/* ==========================================================================
   Reusable motion utilities — orchestrated, restrained, respects
   prefers-reduced-motion (handled globally in main.css).
   ========================================================================== */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes drift {
  0% { transform: translate3d(0, 0, 0) rotate(0deg); }
  50% { transform: translate3d(-2%, 2%, 0) rotate(2deg); }
  100% { transform: translate3d(0, 0, 0) rotate(0deg); }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

@keyframes helixSpin {
  from { transform: rotateY(0deg); }
  to { transform: rotateY(360deg); }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-stagger.is-visible > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.02s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.08s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.14s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.2s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.26s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.32s; }
.reveal-stagger.is-visible > *:nth-child(n+7) { transition-delay: 0.36s; }

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  animation: drift 14s ease-in-out infinite;
  pointer-events: none;
}

.molecule-strand {
  animation: helixSpin 18s linear infinite;
  transform-style: preserve-3d;
}

.glow-dot { animation: pulseGlow 2.4s ease-in-out infinite; }

.fade-in { animation: fadeIn 0.5s ease both; }
.fade-up { animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both; }