.app-boot-spinner {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-size: 14px;
  font-variant: tabular-nums;
  line-height: 1.5715;
  list-style: none;
  font-feature-settings: 'tnum';
  position: absolute;
  color: #ffdc00;
  text-align: center;
  vertical-align: middle;
  opacity: 1;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.78, 0.14, 0.15, 0.86);
}

.app-boot-spinner .boot-spinner-content {
  transform: rotate(45deg);
  animation: antRotate 1.2s infinite linear;
  font-size: 32px;
  position: relative;
  display: inline-block;
  width: 1em;
  height: 1em;
}

.app-boot-spinner .boot-spinner-content .boot-spinner-item {
  position: absolute;
  display: block;
  width: 14px;
  height: 14px;
  background-color: #ffdc00;
  border-radius: 100%;
  transform: scale(0.75);
  transform-origin: 50% 50%;
  opacity: 0.3;
  animation: antSpinMove 1s infinite linear alternate;
}

.app-boot-spinner .boot-spinner-content .boot-spinner-item:nth-child(1) {
  top: 0;
  left: 0;
}

.app-boot-spinner .boot-spinner-content .boot-spinner-item:nth-child(2) {
  top: 0;
  right: 0;
  animation-delay: 0.4s;
}

.app-boot-spinner .boot-spinner-content .boot-spinner-item:nth-child(3) {
  right: 0;
  bottom: 0;
  animation-delay: 0.8s;
}

.app-boot-spinner .boot-spinner-content .boot-spinner-item:nth-child(4) {
  bottom: 0;
  left: 0;
  animation-delay: 1.2s;
}

@keyframes antSpinMove {
  to {
    opacity: 1;
  }
}

@keyframes antRotate {
  to {
    transform: rotate(405deg);
  }
}