.pre-loader {
    position: fixed;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.79);
    color: #FFFDFD;
    text-align: center;
    z-index: 99;
    top: 0;
}
.pre-loader .outer {
    height: 100%;
    display: table;
    text-align: center;
    width: 100%;
}
.pre-loader .inner {
    height: 100%;
    display: table-cell;
    vertical-align: middle;
    position: relative;
}
.pre-loader .inner .wrap {
    position: absolute;
    font-size: 100px;
    -webkit-animation: spinner-spin 1.2s infinite linear;
    -moz-animation: spinner-spin 1.2s infinite linear;
    -ms-animation: spinner-spin 1.2s infinite linear;
    right: 0px;
    left: 0px;
}
.pre-loader .inner .inside {
    position: absolute;
    display: inline-block;
    width: 100px;
    height: 100px;
    left: 0;
    right: 0;
    margin: auto;
}

.loader {
  display: inline-block;
  width: 130px;
  height: 130px;
  position: relative;
  border: 4px solid #Fff;
  /*top: 50%;*/
  animation: loader 2s infinite ease;
}

.loader-inner {
  vertical-align: top;
  display: inline-block;
  width: 100%;
  background-color: #fff;
  animation: loader-inner 2s infinite ease-in;
}

@keyframes loader {
  0% {
    transform: rotate(0deg);
  }
  
  25% {
    transform: rotate(180deg);
  }
  
  50% {
    transform: rotate(180deg);
  }
  
  75% {
    transform: rotate(360deg);
  }
  
  100% {
    transform: rotate(360deg);
  }
}

@keyframes loader-inner {
  0% {
    height: 0%;
  }
  
  25% {
    height: 0%;
  }
  
  50% {
    height: 100%;
  }
  
  75% {
    height: 100%;
  }
  
  100% {
    height: 0%;
  }
}