main {
}

main > div {
    padding: 2%;
    overflow: auto;
}

.photos {
    display: grid;
    grid-auto-rows: 14em;
    grid-template-columns: repeat(auto-fit, 40%);
    grid-gap: 0.8em;
}

.photo img {
    object-position: center;
    object-fit: cover;
    height: 100%;
    width: 100%;
    transition: filter 0.5s;
    filter: grayscale(0.8) brightness(0.4);
}

.photo img:hover {
    filter: none;
}