/* ============================================================
   Caldera — motion. transform/opacity only (GPU friendly).
   All neutralized under prefers-reduced-motion / [data-anim="off"].
   ============================================================ */

/* reveal ripple — staggered by --delay (set inline from Chebyshev dist) */
.cell.reveal-anim {
  animation: reveal-pop var(--dur-base) var(--ease-back) both;
  animation-delay: var(--delay, 0ms);
}
@keyframes reveal-pop {
  0%   { transform: scale(0.86); }
  60%  { transform: scale(1.04); }
  100% { transform: scale(1); }
}

/* number digit pop */
.cell.num-anim {
  animation: num-pop var(--dur-base) var(--ease-back) both;
  animation-delay: var(--delay, 0ms);
}
@keyframes num-pop {
  0%   { color: transparent; transform: scale(0.5); }
  100% { transform: scale(1); }
}

/* flag plant */
.cell.flag-anim .flag-glyph {
  animation: flag-pop 280ms var(--ease-back) both;
}
@keyframes flag-pop {
  0%   { transform: scale(0) rotate(-12deg); }
  60%  { transform: scale(1.15) rotate(4deg); }
  100% { transform: scale(1) rotate(0); }
}
.cell.flag-anim {
  animation: flag-wobble 320ms var(--ease-spring) both;
}
@keyframes flag-wobble {
  0%, 100% { transform: rotate(0); }
  30% { transform: rotate(3deg); }
  60% { transform: rotate(-2deg); }
}

/* mine reveal sweep on loss */
.cell.mine-anim {
  animation: mine-rise 260ms var(--ease-back) both;
  animation-delay: var(--delay, 0ms);
}
@keyframes mine-rise {
  0%   { transform: scale(0.4); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* exploded shockwave ring */
.cell.exploded-anim::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--accent);
  animation: shockwave 520ms ease-out forwards;
  pointer-events: none;
}
@keyframes shockwave {
  0%   { transform: scale(0.5); opacity: 0.9; }
  100% { transform: scale(3.4); opacity: 0; }
}

/* win wave lift */
.cell.win-anim {
  animation: win-wave 600ms var(--ease-spring) both;
  animation-delay: var(--delay, 0ms);
}
@keyframes win-wave {
  0%   { transform: translateY(0); }
  35%  { transform: translateY(-7px); }
  100% { transform: translateY(0); }
}

.well.win-glow { animation: well-glow 1200ms ease-out; }
@keyframes well-glow {
  0%, 100% { box-shadow: var(--well-shadow); }
  40% { box-shadow: var(--well-shadow), 0 0 0 3px color-mix(in srgb, var(--accent) 45%, transparent); }
}

@keyframes overlay-in {
  0%   { opacity: 0; transform: translateY(12px) scale(0.96); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

/* face bump on state change */
.face[data-face="lost"] .face-glyph { animation: face-shake 420ms ease both; }
@keyframes face-shake {
  0%,100% { transform: translateY(-1px) rotate(0); }
  25% { transform: translateY(-1px) rotate(-12deg); }
  75% { transform: translateY(-1px) rotate(12deg); }
}

/* timer record pulse */
.readout-value.pulse { animation: pulse 600ms var(--ease-spring) 2; }
@keyframes pulse {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

/* mine danger flash on hud */
#mine-readout.flash .readout-value { animation: pulse 400ms ease; }

/* honor reduced motion / settings toggle: kill all cell animations */
@media (prefers-reduced-motion: reduce) {
  .cell.reveal-anim, .cell.num-anim, .cell.flag-anim, .cell.mine-anim,
  .cell.win-anim, .cell.exploded-anim::after, .overlay-card {
    animation: none !important;
  }
}
[data-anim="off"] .cell,
[data-anim="off"] .overlay-card,
[data-anim="off"] .well {
  animation: none !important;
}
[data-anim="off"] .cell { transition: background-color var(--dur-base) ease; }