.mff {
    float: left;
    overflow: hidden;
    object-fit: contain;
    z-index: 2;
    position: fixed;
    top: 0;
    left: 0;
}

.mff-img {
    width: 512px;
    height: auto;
}

@media (min-width: 768px) {
    .mff-img {
        width: 350px;
    }
}

@media (min-width: 992px) {
    .mff-img {
     width: 50%;
    }
}

@media (min-width: 430px) {
    .mff-img {
     width: 100%;
    }
}