.loader {
  position: fixed;
  left: 48%;
  bottom: 50%;
  border: 5px solid #f3f3f3;
  border-radius: 50%;
  border-top: 5px solid #2e2e2e;
  width: 50px;
  height: 50px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

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

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

.carga {
display: block;
position: fixed;
top: 0%;
left: 0%;
width: 100%;
height: 100%;
background-color:  #fff;
z-index:1001;
-moz-opacity: 1;
opacity:1;
filter: alpha(opacity=100);
}