.iitc-screenshots {
    display: flex;
    padding-top: 2rem;
    flex-wrap: wrap;
}

.iitc-screenshots img {
    width: calc(25% - 20px);
    margin: 10px;
    border-radius: 5px;
    box-shadow: 0 5px 20px rgba(0,0,0,.3);
}

@media only screen and (max-width: 600px) {
    .iitc-screenshots img {
        width: calc(50% - 20px);
    }
}