body {
    font-family: 'Helvetica Neue', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f7f7f7;
    line-height: 1.6;
}

.main {
    max-width: 800px;
    margin-top: 100px;
    margin-left: auto;
    margin-right: auto;
    background-color: #ffffff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.header-image {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 10vh auto 2rem auto;
    border-radius: 10px;
}

.article-body img{
    max-width: 100%;
    justify-self: center;
    margin: 1rem auto;
}

footer{
    background-color: gray;
}