body {
    background-color: #f7ffbd;

}

.hero {
    width: 100vw;
    height: 100vh;
    display: grid;
    place-content: center;
}

.mb img {
    height: 100vh;
    object-fit: cover;
}

@media screen and (max-width: 640px) {
    .mb img {
        width: 90vw;
    }
}