/* The Backdrop Overlay */
#loading-backdrop {
    display: none; /* Hidden by default */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Semi-transparent black */
    z-index: 9999; /* High z-index to sit on top of everything */
    justify-content: center;
    align-items: center;
}

/* The Spinner Animation */
.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3; /* Light grey */
    border-top: 5px solid #3498db; /* Blue */
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

    100% {
        transform: rotate(360deg);
    }
}