*{
    margin: 0;
    padding: 0;
    box-sizing: content-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

h1{
    font-size: 1.5rem;
}

h2{
    font-size: 1.15rem;
}

article{
    padding: 1rem;
}
article+article{
    margin-top: 2rem;
}

article > *{
    max-width: 100%;
    overflow: hidden;
}

.headsup{
    background-color: brown;
    color: white;
    padding: 1.5rem;
    text-align: center;
}

@media screen and (min-width: 768px) {
    .headsup{
    display: none;
    }
}