.preloader {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 999;
  width: 100%;
  height: 100%;
  overflow: visible;
  background: #fff;
}
.loading-spinner {
  top: 50%;
  left: 50%;
  margin-top: -63px;
  margin-left: -63px;
  display: block;
  position: absolute;
  width: 126px;
  height: 126px;
  border-radius: 50%;
  border: 4px solid transparent;
  border-top: 4px solid #016064;
  -webkit-animation: loader-spin 2s linear infinite;
  animation: loader-spin 2s linear infinite;
}

.loading-spinner::before,
.loading-spinner::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  border: 4px solid transparent;
}
.loading-spinner::before {
  top: 5px;
  left: 5px;
  right: 5px;
  bottom: 5px;
  border-top-color: #37a8ae;
  -webkit-animation: loader-spin 3s linear infinite;
  animation: loader-spin 3.5s linear infinite;
}
.loading-spinner::after {
  top: 15px;
  left: 15px;
  right: 15px;
  bottom: 15px;
  border-top-color: #1b677e;
  -webkit-animation: loader-spin 1.5s linear infinite;
  animation: loader-spin 1.75s linear infinite;
}

.heartbeat-loader {
  -moz-animation: heartbeat-loader 1300ms ease 0s infinite normal;
  -webkit-animation: heartbeat-loader 1300ms ease 0s infinite normal;
  animation: heartbeat-loader 1300ms ease 0s infinite normal;
  position: absolute;
  text-indent: -9999px;
  background: url('/assets/logo/logo_icon.png') 0 0/40px 40px no-repeat;
  top: 50%;
  left: 50%;
  margin-top: -20px;
  margin-left: -20px;
  width: 40px;
  height: 40px;
  -moz-transform-origin: 50% 50%;
  -ms-transform-origin: 50% 50%;
  -webkit-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
}

@-webkit-keyframes loader-spin {
  from {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@keyframes loader-spin {
  from {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -webkit-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}

@keyframes heartbeat-loader {
  0% {
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  14% {
    -moz-transform: scale(1.3);
    -ms-transform: scale(1.3);
    -webkit-transform: scale(1.3);
    transform: scale(1.3);
  }
  28% {
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  42% {
    -moz-transform: scale(1.3);
    -ms-transform: scale(1.3);
    -webkit-transform: scale(1.3);
    transform: scale(1.3);
  }
  70% {
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}