.article_header {
    border-bottom: 1px solid #aaa;
    padding: 3em 0;
    min-width: 980px;
}
@media(max-width: 768px){
    min-width: 100%;
}

/*
.article_header h1 {
    display: flex;
    justify-content: center;
    align-items: center;
}
*/