@media screen and (max-width: 650px) {
    .block {
        min-width: 250px;
    }
    .project_base
    {
        width: 200px;
        height: 100px;
    }
}

@media screen and (min-width: 650px) {
    .block {
        min-width: 95%;
    }
}

@media screen and (min-width: 1280px) {
    .project_base
    {
        width: 600px;
        height: 300px;
    }
}