.loader {
   position: absolute;
   left: 50%;
   top: 50%;
   width: 120px;
   height: 120px;
   margin: -76px 0 0 -76px;
   border: 16px solid #f3f3f3;
   border-radius: 50%;
   border-top: 16px solid #00558C;
   -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); }
 }