.overlay {
  display: none;
  position: fixed;
  width: 100%;
  height: 100%;
  background: #fff;
  z-index: 10;
  opacity: 0.7;
}

.loader {

  display: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 5px solid #333;
  position: relative;
  margin: 0 auto;
  top: 30px;
  animation:loader 2s linear infinite;
}

@keyframes loader {

  50% {
    opacity: 0.5;
  }

  100% {
    transform:rotate(360deg); 
  }
}

.loader:after {
  content: "";
  width: 20px;
  height: 20px;
  background: #333;
  position: absolute;
  border-radius: 50%;
  top: -10px;
  left: 5px;

}


/*.loader:before {
  content: "wertwe";
  width: 0;
  height: 0;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
  border-bottom: 15px solid #333;
  position: absolute;
  transform: rotate(-90deg);
  top: -10px;
  left: 39px; 


}*/