#spinner {
    position: fixed;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    top: 0;
    background: rgba(0, 0, 0, 0.7);
    transition: opacity 0.2s;
    visibility: hidden;
    opacity: 0;
}

#spinner.show {
    visibility: visible;
    opacity: 1;
}

/*
        .plus {
            display: flex;
            margin: 0 auto;
        }
        */