.loader-screen {
    width: 100%;
    height: 100%;
    background:rgba(0,0,0,0.3); 
    position: absolute;
    top: 0;
    left: 0;
    z-index: 9990; 
}
.spinner,.loader{
  margin: auto;
  font-size: 10px;
  position: relative;
  text-indent: -9999em;
  border-top: 0.8em solid rgba(255, 255, 255, 0.4);
  border-right: 0.8em solid rgba(255, 255, 255, 0.4);
  border-bottom: 0.8em solid rgba(255, 255, 255, 0.4);
  border-left: 0.8em solid #ffffff;
  -webkit-transform: translateZ(0);
  -ms-transform: translateZ(0);
  transform: translateZ(0);
  -webkit-animation: load8 1.1s infinite linear;
  animation: load8 1.1s infinite linear;
  top: calc(50% - 5em);
   -webkit-transform: translate(0,-50%);
  -ms-transform: translate(0,-50%);
   transform: translate(0,-50%);
   margin-top:30px;
}
.loader,
.loader:after {
  border-radius: 50%;
  width: 5em;
  height: 5em;
}
@-webkit-keyframes load8 {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes load8 {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}