/* Spinner Overlay */
.spinner-overlay {
    position: absolute; /* Position relative to .card-body */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8); /* Semi-transparent white */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000; /* Ensure it's above other content */
    display: none; /* Hidden by default */
}

/* Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3; /* Light grey */
    border-top: 4px solid #3498db; /* Blue */
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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