/* ============================================================
   GLASSGRID — ANIMATIONS & MOTION
   All durations/easings reference tokens.
   ============================================================ */

/* ── Page Transition ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

@keyframes slideDown {
  from { transform: translateY(-100%); }
  to   { transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

/* ── Like Heart Pop ── */
@keyframes heartPop {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.35); }
  60%  { transform: scale(0.9); }
  100% { transform: scale(1); }
}

/* ── Toast ── */
@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px) translateX(-50%) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) translateX(-50%) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) translateX(-50%) scale(1); }
  to   { opacity: 0; transform: translateY(-6px) translateX(-50%) scale(0.95); }
}

/* ── Shimmer Skeleton ── */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* ── Spin ── */
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ── Pulse ── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* ── Float ── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

/* ─── Animation Utility Classes ─── */
.animate-fadeInUp    { animation: fadeInUp var(--duration-normal) var(--ease-out) both; }
.animate-fadeIn      { animation: fadeIn var(--duration-normal) var(--ease-out) both; }
.animate-scaleIn     { animation: scaleIn var(--duration-normal) var(--ease-spring) both; }
.animate-slideUp     { animation: slideUp var(--duration-slow) var(--ease-out) both; }
.animate-heartPop    { animation: heartPop var(--duration-slow) var(--ease-spring); }
.animate-toastIn     { animation: toastIn var(--duration-normal) var(--ease-spring) both; }
.animate-spin        { animation: spin 1s linear infinite; }
.animate-pulse       { animation: pulse 2s ease-in-out infinite; }
.animate-float       { animation: float 3s ease-in-out infinite; }

/* ─── Skeleton Loader ─── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-glass-fill) 25%,
    var(--color-glass-fill-md) 50%,
    var(--color-glass-fill) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s linear infinite;
  border-radius: var(--radius-md);
}

/* ─── Staggered Children ─── */
.stagger > *:nth-child(1)  { animation-delay: 0ms; }
.stagger > *:nth-child(2)  { animation-delay: 60ms; }
.stagger > *:nth-child(3)  { animation-delay: 120ms; }
.stagger > *:nth-child(4)  { animation-delay: 180ms; }
.stagger > *:nth-child(5)  { animation-delay: 240ms; }
.stagger > *:nth-child(6)  { animation-delay: 300ms; }
.stagger > *:nth-child(7)  { animation-delay: 360ms; }
.stagger > *:nth-child(8)  { animation-delay: 420ms; }

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