/* CSS for the loading animation */
#loading-animation {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.7);
    z-index: 9999;
    text-align: center;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.3);
    border-radius: 50%;
    border-top: 4px solid #3498db;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -20px;
    margin-left: -20px;
}

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

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