.loader{
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  width: 64px;
  height: 64px;
  z-index:9999;
  -webkit-animation: spin 1s linear infinite;
  animation: spin 1s 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); }
  }
}
header{
  background-color:#085078;
  color: #f8fff3;
  padding: 0.6em;
}
.main {
  padding-top: 11%;
}