.section-heading {
    text-transform: uppercase;
    font-size: 16px;
    padding-bottom: 10px;
    border-bottom: 5px solid #1B3D751A;
    margin-bottom: 10px;
}

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

@media (min-width: 1200px) {
    .section-heading {
         font-size: 22px;
    }
}