div.spinner-container {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1001;
    display: none;
    align-items: center;
    justify-content: center;
    flex-flow: column nowrap;
}

    div.spinner-container h1 {
        color: #f3f3f3;
    }

    .loader {
        border: 16px solid #f3f3f3; /* Light grey */
        border-top: 16px solid #3498db; /* Blue */
        border-radius: 50%;
        width: 120px;
        height: 120px;
        animation: spin 2s linear infinite;
    }

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

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