#main_loader {
    display:none;
  width: 120px;
  height: 120px;
  position: relative;
  background-image: url(https://meroketetapjaya.com/assets/img/meroke-tetap-jaya-logo.png);
  background-position: center;
  background-size: 50%;
  background-repeat: no-repeat;
  margin: 0 auto;
  top: calc(50% - 60px);
    position: fixed;
    z-index: 9;
    left: calc(50% - 60px);
    background-color: #fff;
}
.btn-ajax {
  position: fixed;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.5);
  width: 100%;
  height: 100vh;
  top: 0;
  padding-top: calc(50vh - 60px);
  display: none;
}
.btn-ajax.active {
  display: block;
}
#main_loader:before {
  content: " ";
  animation: spin 2s linear infinite;
  border: 5px solid #f3f3f3;
  border-top: 5px solid #707070;
  border-radius: 50%;
  height: 100%;
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  border-top: 5px solid #eb5e3e;
}

@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}