body {
  margin: 0;
}

#loading-bg {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  height: 100vh;
}
.loading-logo img {
  max-height: 200px;
}

.hidden-area {
  display: none;
}

.spinner {
  width: 80px;
  height: 80px;
  --clr: rgb(127, 207, 255);
  --clr-alpha: rgb(127, 207, 255, .1);
  animation: spinner 2s infinite linear;
  transform-style: preserve-3d;
}

.spinner > div {
  background-color: var(--clr-alpha);
  height: 100%;
  position: absolute;
  width: 100%;
  border: 5px solid var(--clr);
}

.spinner div:nth-of-type(1) {
  transform: translateZ(-40px) rotateY(180deg);
}

.spinner div:nth-of-type(2) {
  transform: rotateY(-270deg) translateX(50%);
  transform-origin: top right;
}

.spinner div:nth-of-type(3) {
  transform: rotateY(270deg) translateX(-50%);
  transform-origin: center left;
}

.spinner div:nth-of-type(4) {
  transform: rotateX(90deg) translateY(-50%);
  transform-origin: top center;
}

.spinner div:nth-of-type(5) {
  transform: rotateX(-90deg) translateY(50%);
  transform-origin: bottom center;
}

.spinner div:nth-of-type(6) {
  transform: translateZ(40px);
}

@keyframes spinner {
  0% {
    transform: rotate(0deg) rotateX(0deg) rotateY(0deg);
  }

  50% {
    transform: rotate(180deg) rotateX(180deg) rotateY(180deg);
  }

  100% {
    transform: rotate(360deg) rotateX(360deg) rotateY(360deg);
  }
}