.virtual-hourglass {
  position: absolute;
  right: -80px;
  top: 10px;
  width: 24px;
  height: 100px;
  border: 2px solid #999;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(to top, green 100%, transparent 0%);
  transition: background 1s linear;
  z-index: 5;
}
.hourglass-countdown {
  position: absolute;
  font-size: 24px;
  font-weight: bold;
  color: #fff;
  display: none;
  text-shadow: 1px 1px 3px black;
  height: 100%;
  width: 100%x;
  aspect-ratio: 1 / 1;
}

#selected-tile-wrapper {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 12px;
  position: relative;
}

#hourglass-slot {
  position: relative;
  height: 100%;
  width: 100%x;
  aspect-ratio: 1 / 1;
 }

.fading-dots-hourglass.waiting .dot {
  opacity: 0.3;
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@keyframes explode {
  0%   { transform: scale(1); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}

.explosion-particle {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 99;
  opacity: 0;
  transform: translate(-50%, -50%);
}