.loading {
    border: 16px solid #f3f3f3;
    /* Light grey */
    border-top: 16px solid #3498db;
    /* Blue */
    border-radius: 50%;
    width: 120px;
    height: 120px;
    animation: spin 2s linear infinite;
    z-index: 1200;
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    margin-top: -100px;
    margin-left: -3.5rem;
}

.loading-container {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1200; /* Sit on top */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

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