.preloader {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: 99999;
    background: #f9f9f9;
    top: 0;
    left: 0;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
  }

  @-webkit-keyframes loader {

    0%,
    10%,
    100% {
      width: 80px;
      height: 80px;
    }

    65% {
      width: 150px;
      height: 150px;
    }
  }

  @keyframes loader {

    0%,
    10%,
    100% {
      width: 80px;
      height: 80px;
    }

    65% {
      width: 150px;
      height: 150px;
    }
  }

  @-webkit-keyframes loaderBlock {

    0%,
    30% {
      -webkit-transform: rotate(0);
      transform: rotate(0);
    }

    55% {
      background-color: #fff;
    }

    100% {
      -webkit-transform: rotate(90deg);
      transform: rotate(90deg);
    }
  }

  @keyframes loaderBlock {

    0%,
    30% {
      -webkit-transform: rotate(0);
      transform: rotate(0);
    }

    55% {
      background-color: #1377bb;
    }

    100% {
      -webkit-transform: rotate(90deg);
      transform: rotate(90deg);
    }
  }

  @-webkit-keyframes loaderBlockInverse {

    0%,
    20% {
      -webkit-transform: rotate(0);
      transform: rotate(0);
    }

    55% {
      background-color: #fff;
    }

    100% {
      -webkit-transform: rotate(-90deg);
      transform: rotate(-90deg);
    }
  }

  @keyframes loaderBlockInverse {

    0%,
    20% {
      -webkit-transform: rotate(0);
      transform: rotate(0);
    }

    55% {
      background-color: #1377bb;
    }

    100% {
      -webkit-transform: rotate(-90deg);
      transform: rotate(-90deg);
    }
  }

  .preloader .loader {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 80px;
    height: 80px;
    -webkit-transform: translate(-50%, -50%) rotate(45deg) translate3d(0, 0, 0);
    transform: translate(-50%, -50%) rotate(45deg) translate3d(0, 0, 0);
    -webkit-animation: loader 1.2s infinite ease-in-out;
    animation: loader 1.2s infinite ease-in-out;
  }

  .preloader .loader span {
    position: absolute;
    display: block;
    width: 40px;
    height: 40px;
    background-color: #fff;
    -webkit-animation: loaderBlock 1.2s infinite ease-in-out both;
    animation: loaderBlock 1.2s infinite ease-in-out both;
  }

  .preloader .loader span:nth-child(1) {
    top: 0;
    left: 0;
  }

  .preloader .loader span:nth-child(2) {
    top: 0;
    right: 0;
    -webkit-animation: loaderBlockInverse 1.2s infinite ease-in-out both;
    animation: loaderBlockInverse 1.2s infinite ease-in-out both;
  }

  .preloader .loader span:nth-child(3) {
    bottom: 0;
    left: 0;
    -webkit-animation: loaderBlockInverse 1.2s infinite ease-in-out both;
    animation: loaderBlockInverse 1.2s infinite ease-in-out both;
  }

  .preloader .loader span:nth-child(4) {
    bottom: 0;
    right: 0;
  }