.NotFound{
    height: 150vh;
    width: 100vw;
    background: url(https://images.unsplash.com/gifs/weird/weird-12.gif);
    background-size: cover;
    background-repeat: no-repeat;
    font-size: 100px;
    color: white;
    align-items: center;
    text-align: center;
    font-style: italic;
}
@media (max-width:700px) {
    .NotFound{
        background-size: contain;
        height: 50vh;
        font-size: 50px;
    }
}
@media (max-width:900px) {
    .NotFound{
        background-size: contain;
        height: 60vh;
        font-size: 60px;
    }
}