body {
    font-family: sans-serif;
    font-size: 20px;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    align-items: center;
}

body > * {
    width: 600px;
}

nav {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    margin-top: 60px;
    margin-bottom: 60px;
    font-size: 30px;
}

h1, h2 {
    font-weight: bold;
}

a {
    color: black;
    text-decoration: none;
}

a:hover {
    color: magenta;
}

article {
    margin-bottom: 60px;
}

img {
    margin-bottom: 20px;
    width: 100%;
}

footer {
    text-align: center;
    font-size: 12px;
    margin-bottom: 40px;
}

/* state of the art responsive design */
@media (max-width: 700px) {
    body > * {
        width: 90vw;
    }

    nav {
        margin-top: 40px;
        margin-bottom: 40px;
        font-size: 20px;
    }
}