a.disabled {
  pointer-events: none;
  cursor: default;
}

.loader {

    margin: auto;
    border: 16px solid #f3f3f3; /* Light */
    border-top: 16px solid #f44336; /* Red */
    border-radius: 50%;
    width: 120px;
    height: 120px;
    animation: spin 2s linear infinite;
 }

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