ds-site/Resources/Private/Sass/Frontend/layout/_header.scss

body > header {
    font-family: $font-family-sans-serif;
    letter-spacing: 0.5em;
    word-spacing: 0.75em;
    font-weight: lighter;

    padding-bottom: $spacer * 4;

    a {
        font-size: $h1-font-size;
        text-decoration: none;
    }

    small {
        font-size: 1em;
    }
}

@media (max-width: 768px) {
    body > header {
        small {
            display: none;
        }
    }
}

@media (max-width: 1439px) {
    body > header {
        padding-bottom: $spacer;
    }
}