.loader {
    border: 18px solid #f3f3f3; /* Light grey */
    border-top: 18px solid #3498db; /* Blue */
    border-radius: 50%;
    width: 180px;
    height: 180px;
    margin-left: auto;
    margin-right: auto;
    margin-top: 60px;
    animation: spin 2s linear infinite;
    
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }