.game-window--stack{max-width:400px}
.game-canvas-wrap--stack{aspect-ratio:2/3;background:var(--bg-alt)}
#stackCanvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;cursor:pointer}

.game-card-stack-plat{
  position:absolute;height:7px;border-radius:3px;background:var(--accent);opacity:.85;
}
.game-card-stack-char{
  position:absolute;width:20px;height:20px;border-radius:6px;background:var(--accent-bright);
  box-shadow:0 0 16px rgba(143,227,168,.6);
  animation:game-card-stack-hop 2s ease-in-out infinite;
}
@keyframes game-card-stack-hop{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-40px)}
}

@media (max-width:520px){
  .game-window--stack{max-width:none}
}

@media (prefers-reduced-motion: reduce){
  .game-card-stack-char{animation:none}
}