/* Variables */
/* Base */

.loader {
  width: 50px;
  height: 50px;
  display: inline-block;
  vertical-align: middle;
  position: relative; 
}

.loader-double {
  border-radius: 50px;
  border: 6px solid transparent;
  border-top-color: #2980b9;
  border-bottom-color: #2980b9;
  -webkit-animation: spin 1s linear infinite;
  -moz-animation: spin 1s linear infinite;
  animation: spin 1s linear infinite; 
}

.loader-double:after {
  content: '';
  position: absolute;
  top: 5px;
  left: 5px;
  bottom: 5px;
  right: 5px;
  border-radius: 50px;
  border: 6px solid transparent;
  border-top-color: #2980b9;
  border-bottom-color: #2980b9;
  opacity: 0.6;
  -webkit-animation: spinreverse 2s linear infinite;
  -moz-animation: spinreverse 2s linear infinite;
  animation: spinreverse 2s linear infinite; 
}

/* Animations */
@-webkit-keyframes spin {
  from {
    -webkit-transform: rotate(0deg); 
  }

  to {
    -webkit-transform: rotate(360deg); 
  } 
}

@-moz-keyframes spin {
  from {
    -moz-transform: rotate(0deg); 
  }

  to {
    -moz-transform: rotate(360deg); 
  } 
}

@keyframes spin {
  from {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg); 
  }

  to {
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg); 
  } 
}

@-webkit-keyframes spinreverse {
  from {
    -webkit-transform: rotate(0deg); 
  }

  to {
    -webkit-transform: rotate(-360deg); 
  } 
}

@-moz-keyframes spinreverse {
  from {
    -moz-transform: rotate(0deg); 
  }

  to {
    -moz-transform: rotate(-360deg); 
  } 
}

@keyframes spinreverse {
  from {
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -ms-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg); 
  }

  to {
    -webkit-transform: rotate(-360deg);
    -moz-transform: rotate(-360deg);
    -ms-transform: rotate(-360deg);
    -o-transform: rotate(-360deg);
    transform: rotate(-360deg); 
  } 
}