.section-heading {
    color: #3b1544;
    margin: 0 0 1em;
    text-transform: uppercase;
    font-size: 16px;
}

@media (min-width: 600px) {
    .section-heading {
         font-size: 20px;
    }
}

@media (min-width: 1200px) {
    .section-heading {
         font-size: 24px;
    }
}