.modal {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 10000;
}

.modal-off {
    visibility: hidden;
    animation: fadeout 0.4s linear 1 normal
}

@keyframes fadeout {
    0% {
        visibility: visible;
        opacity: 1.0;
    }
    100% {
        visibility: hidden;
        opacity: 0;
    }
}