/* mobile devices */
@media screen and (max-width: 570px) {
    div.feature{
        text-align: center;
    }
    div.feature h1{
        font-size: calc(var(--t-unit) * 2.75);
        line-height: calc(var(--t-unit) * 2.25);
        letter-spacing: -3px;
    }
}