/* ============================================
   VELNU — Animations
   ============================================ */

@keyframes float-door {
  0%, 100% { transform: translateY(0) scale(calc(0.7 + var(--depth, 0.5) * 0.3)); }
  50% { transform: translateY(-8px) scale(calc(0.72 + var(--depth, 0.5) * 0.3)); }
}

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

@keyframes gear-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes portal-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes bloom-pulse {
  0%, 100% { opacity: 0.5; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.8; transform: translateX(-50%) scale(1.1); }
}

@keyframes light-spill {
  0% { opacity: 0; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.1); }
  100% { opacity: 0.6; transform: scale(1); }
}

@keyframes particle-drift {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100vh) translateX(20px); opacity: 0; }
}

@keyframes key-shimmer {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.3); }
}

@keyframes mirror-shimmer {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

@keyframes portal-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(181, 157, 106, 0.2); }
  50% { box-shadow: 0 0 40px rgba(181, 157, 106, 0.4); }
}

@keyframes fade-rise {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes door-approach {
  from { transform: scale(0.2); filter: brightness(0.3); }
  to { transform: scale(1); filter: brightness(1); }
}

.light-spill-active {
  animation: light-spill 1.5s ease-out forwards;
}

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.key-nav-burst {
  position: fixed;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brass);
  pointer-events: none;
  z-index: 8999;
  animation: key-burst 0.6s ease-out forwards;
}

@keyframes key-burst {
  0% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 0 rgba(181, 157, 106, 0.6); }
  100% { transform: scale(20); opacity: 0; box-shadow: 0 0 40px 20px rgba(181, 157, 106, 0); }
}

.memory-door.open .memory-door__frame {
  box-shadow: 0 0 40px rgba(181, 157, 106, 0.25);
}

.atmosphere-dust {
  position: absolute;
  width: 2px;
  height: 2px;
  background: rgba(215, 221, 232, 0.3);
  border-radius: 50%;
  animation: particle-drift linear infinite;
  pointer-events: none;
}