/* ========== Loading Overlay ========== */
.loading {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 9999;

  background-color: #f4f5f5;
  pointer-events: none;
}

/* ========== Loader ========== */
.loader {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  margin: -20px 0 0 -20px;

  background-color: #3742fa;
  border-radius: 50%;

  will-change: transform;
  animation: scaleout 0.6s infinite ease-in-out forwards;

  /* 隐藏文字 */
  text-indent: -99999px;
}

/* ========== Keyframes ========== */
@keyframes scaleout {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  40% {
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 0;
  }
}