.loader {
          border: 16px solid #f3f3f3;
          border-radius: 50%;
          border-top: 16px solid #3498db;
          width: 120px;
          height: 120px;
          -webkit-animation: spin 2s linear infinite; /* Safari */
          animation: spin 2s linear infinite;
          
          position: absolute;
          top: 20%;
          left: 40%;
        }

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

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