@media only screen and (min-width : 320px) {
    /* Styles here */
}

@media only screen and (min-width : 460px) {
    .catalog {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media only screen and (min-width : 768px) {
    .about span {
        max-width: 610px;
    }
    .catalog {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media only screen and (min-width : 1200px) {

}

@media only screen and (min-width : 1600px) {
    /* Styles here */
}