/* ==========================================================================
   animations.css — keyframes + reveal-on-scroll utilities.
   All motion respects prefers-reduced-motion (see base.css).
   ========================================================================== */

@keyframes fadeIn   { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp  { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideDown{ from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes spin     { to { transform: rotate(360deg); } }
@keyframes pulse    { 0%,100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.3); opacity: 0.6; } }
@keyframes blink    { 50% { opacity: 0; } }
@keyframes float    {
  0%,100% { transform: translateY(0) translateX(0); }
  50%     { transform: translateY(-18px) translateX(6px); }
}
@keyframes shimmer  {
  0% { background-position: -200px 0; }
  100% { background-position: 200px 0; }
}
@keyframes gradientMove {
  0%,100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Reveal-on-scroll: start hidden, add .is-visible via IntersectionObserver */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(.4,.0,.2,1), transform 0.7s cubic-bezier(.4,.0,.2,1);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal-stagger.is-visible > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 400ms; }
.reveal-stagger.is-visible > *:nth-child(7) { transition-delay: 480ms; }
.reveal-stagger.is-visible > *:nth-child(8) { transition-delay: 560ms; }

/* Loading shimmer for lazy images */
.img-skeleton {
  background: linear-gradient(90deg, var(--bg-2) 0%, var(--bg-3) 50%, var(--bg-2) 100%);
  background-size: 400px 100%;
  animation: shimmer 1.6s linear infinite;
}

/* Page enter */
main { animation: fadeIn 0.5s ease both; }