.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Semi-transparent black */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999; /* Ensure it's above other content */
  }
  
  /* Loader animation */
  .loader {
    border: 8px solid #f3f3f3; /* Light grey */
    border-top: 8px solid #3498db; /* Blue */
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
  }
  
  .redeemed {
      color: green;
      text-align: center;
  }
  
   .btn {
      background-color: forestgreen;
      border-color: forestgreen;
      color: white;
      font-weight: bold;
      
    }

    .btn:hover {
      background-color: forestgreen;
      border-color: forestgreen;
      color: white
    }
  
  
  #tableContainer {
    max-height:550px; 
    overflow-y: auto; 
}
#tableContainer::-webkit-scrollbar {
            width: 0;
        }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }