#preload {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9;
  display: flex;
  align-content: center;
  justify-content: center;
  animation: opacityAnimation 1.8s ease forwards;
}

.sk-folding-cube {
  top: 50%;
  left: 50%;
  margin-left: -25px;
  margin-top: -25px;
  width: 50px;
  height: 50px;
  position: absolute;
  -webkit-transform: rotateZ(45deg);
  transform: rotateZ(45deg);
}

.sk-folding-cube .sk-cube {
  float: left;
  width: 50%;
  height: 50%;
  position: relative;
  -webkit-transform: scale(1.1);
  -ms-transform: scale(1.1);
  transform: scale(1.1);
}

.sk-folding-cube .sk-cube2 {
  -webkit-transform: scale(1.1) rotateZ(90deg);
  transform: scale(1.1) rotateZ(90deg);
}

.sk-folding-cube .sk-cube4 {
  -webkit-transform: scale(1.1) rotateZ(270deg);
  transform: scale(1.1) rotateZ(270deg);
}

.sk-folding-cube .sk-cube3 {
  -webkit-transform: scale(1.1) rotateZ(180deg);
  transform: scale(1.1) rotateZ(180deg);
}

.sk-folding-cube .sk-cube:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -webkit-animation: sk-foldCubeAngle 2.4s infinite linear both;
  animation: sk-foldCubeAngle 2.4s infinite linear both;
  -webkit-transform-origin: 100% 100%;
  -ms-transform-origin: 100% 100%;
  transform-origin: 100% 100%;
  background: #0f71f2;
}

.sk-folding-cube .sk-cube2:before {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
  background: #3ea210;
}

.sk-folding-cube .sk-cube4:before {
  -webkit-animation-delay: 0.9s;
  animation-delay: 0.9s;
  background: #f2a20c;
}

.sk-folding-cube .sk-cube3:before {
  -webkit-animation-delay: 0.6s;
  animation-delay: 0.6s;
  background: #d92929;
}

@keyframes opacityAnimation {
  0% {
    background-color: #fff;
  }
  100% {
    background-color: #ffffff00;
  }
}

@keyframes sk-foldCubeAngle {
  0%,
  10% {
    -webkit-transform: perspective(140px) rotateX(-180deg);
    transform: perspective(140px) rotateX(-180deg);
    opacity: 0;
  }
  25%,
  75% {
    -webkit-transform: perspective(140px) rotateX(0);
    transform: perspective(140px) rotateX(0);
    opacity: 1;
  }
  100%,
  90% {
    -webkit-transform: perspective(140px) rotateY(180deg);
    transform: perspective(140px) rotateY(180deg);
    opacity: 0;
  }
}