.preloader {
  background: rgb(255, 255, 255);
  height: 100%;
  left: 0;
  position: fixed;
  text-align: center;
  top: 0;
  width: 100%;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
}


.sk-cube-grid {
  width: 100%;
  height: 100%;
}

.sk-cube-grid .sk-cube {
  width: 33%;
  height: 33%;
  background-color: rgba(0, 0, 0, 0.7);
  float: left;
  -webkit-animation: sk-cubeGridScaleDelay 1.3s infinite ease-in-out;
  animation: sk-cubeGridScaleDelay 1.3s infinite ease-in-out;
}

.sk-cube-grid .sk-cube1 {
  -webkit-animation-delay: 0.2s;
  animation-delay: 0.2s;
}

.sk-cube-grid .sk-cube2 {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}

.sk-cube-grid .sk-cube3 {
  -webkit-animation-delay: 0.4s;
  animation-delay: 0.4s;
}

.sk-cube-grid .sk-cube4 {
  -webkit-animation-delay: 0.1s;
  animation-delay: 0.1s;
}

.sk-cube-grid .sk-cube5 {
  -webkit-animation-delay: 0.2s;
  animation-delay: 0.2s;
}

.sk-cube-grid .sk-cube6 {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}

.sk-cube-grid .sk-cube7 {
  -webkit-animation-delay: 0s;
  animation-delay: 0s;
}

.sk-cube-grid .sk-cube8 {
  -webkit-animation-delay: 0.1s;
  animation-delay: 0.1s;
}

.sk-cube-grid .sk-cube9 {
  -webkit-animation-delay: 0.2s;
  animation-delay: 0.2s;
}

@-webkit-keyframes sk-cubeGridScaleDelay {
  0%, 70%, 100% {
    transform: scale3D(1, 1, 1);
  }
  35% {
    transform: scale3D(0, 0, 1);
  }
}
@keyframes sk-cubeGridScaleDelay {
  0%, 70%, 100% {
    transform: scale3D(1, 1, 1);
  }
  35% {
    transform: scale3D(0, 0, 1);
  }
}