.track-loading {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: #080808;
  color: #f5f5f5;
}

.track-loading-mark {
  width: 78px;
  height: 78px;
  border-radius: 20px;
  box-shadow: 0 18px 48px rgb(0 0 0 / 42%);
  animation: track-loading-heartbeat 1.8s ease-in-out infinite;
}

@keyframes track-loading-heartbeat {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.92;
  }
  14% {
    transform: scale(1.04);
    opacity: 1;
  }
  28% {
    transform: scale(1);
  }
  42% {
    transform: scale(1.025);
  }
}

@media (prefers-reduced-motion: reduce) {
  .track-loading-mark {
    animation: none;
  }
}