.modal {
    background-color: rgba(0,0,0,0.9);
    height: 100%;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    align-items: center;
    justify-content: center;
}

.modal > * {
    max-width: 100%;
    max-height: 100%;
}