.sk-loader {
  width: 60px;
  height: 60px;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 60px;
  right: 0;
  margin: auto;
}

.sk-ponster {
  color: #007bff;
  position: relative;
  transform: translate(-35%, 0);
}

.sk-folding-cube {
    margin: 20px auto;
    width: 40px;
    height: 40px;
    position: relative;
    -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-cube:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #007bff;
    -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%;
  }
  .sk-folding-cube .sk-cube2 {
    -webkit-transform: scale(1.1) rotateZ(90deg);
            transform: scale(1.1) rotateZ(90deg);
  }
  .sk-folding-cube .sk-cube3 {
    -webkit-transform: scale(1.1) rotateZ(180deg);
            transform: scale(1.1) rotateZ(180deg);
  }
  .sk-folding-cube .sk-cube4 {
    -webkit-transform: scale(1.1) rotateZ(270deg);
            transform: scale(1.1) rotateZ(270deg);
  }
  .sk-folding-cube .sk-cube2:before {
    -webkit-animation-delay: 0.3s;
            animation-delay: 0.3s;
  }
  .sk-folding-cube .sk-cube3:before {
    -webkit-animation-delay: 0.6s;
            animation-delay: 0.6s; 
  }
  .sk-folding-cube .sk-cube4:before {
    -webkit-animation-delay: 0.9s;
            animation-delay: 0.9s;
  }
  @-webkit-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(0deg);
              transform: perspective(140px) rotateX(0deg);
      opacity: 1; 
    } 90%, 100% {
      -webkit-transform: perspective(140px) rotateY(180deg);
              transform: perspective(140px) rotateY(180deg);
      opacity: 0; 
    } 
  }
  
  @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(0deg);
              transform: perspective(140px) rotateX(0deg);
      opacity: 1; 
    } 90%, 100% {
      -webkit-transform: perspective(140px) rotateY(180deg);
              transform: perspective(140px) rotateY(180deg);
      opacity: 0; 
    }
  }