/* ============================================
   Animations & Transitions
   ============================================ */

/* ---- Reveal on Scroll ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Staggered delays for grid children */
.stagger > *:nth-child(1) { transition-delay: 0ms; }
.stagger > *:nth-child(2) { transition-delay: 100ms; }
.stagger > *:nth-child(3) { transition-delay: 200ms; }
.stagger > *:nth-child(4) { transition-delay: 300ms; }
.stagger > *:nth-child(5) { transition-delay: 400ms; }
.stagger > *:nth-child(6) { transition-delay: 500ms; }

/* ---- Keyframes ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

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

@keyframes pulse-ring {
  0%   { transform: scale(0.9); opacity: 0.6; }
  100% { transform: scale(1.4); opacity: 0; }
}

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

@keyframes glow-pulse {
  0%, 100% { opacity: 0.4; }
  50%      { opacity: 0.8; }
}

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

@keyframes particle-float {
  0%   { opacity: 0; transform: translateY(0) scale(0); }
  15%  { opacity: 0.7; }
  85%  { opacity: 0.3; }
  100% { opacity: 0; transform: translateY(-100vh) scale(1); }
}

/* ---- Utility Animation Classes ---- */
.animate-fade-in  { animation: fadeIn 0.6s var(--ease) forwards; }
.animate-fade-up  { animation: fadeInUp 0.6s var(--ease) forwards; }
.animate-float    { animation: float 3s ease-in-out infinite; }
.animate-shimmer  {
  background-size: 200% 200%;
  animation: shimmer 3s ease-in-out infinite;
}
.animate-gradient {
  background-size: 200% 200%;
  animation: gradient-shift 6s ease infinite;
}

/* ---- Hover Micro-interactions ---- */
.hover-lift {
  transition: transform var(--t-base), box-shadow var(--t-base);
}

.hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.hover-glow {
  transition: box-shadow var(--t-base), border-color var(--t-base);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
  border-color: var(--color-border-hover);
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1;
    transform: none;
  }
}