body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
}

.container {
    margin: 0 auto;
    max-width: 992px;
    padding: 0 1.5em;
}

header {
    padding-bottom: 2rem;
    padding-top: 2rem;
    text-align: center;
}

header picture {
    display: block;
    margin: 0 auto;
    max-width: 300px;
    width: 100%;
}

img {
    width: 100%;
}

p {
    line-height: 1.5;
}

nav {
    background: #eee;
    padding: 1rem;
}

nav div:first-child p {
    margin-top: 0;
}

nav div:last-child p {
    margin-bottom: 0;
}

article {
    padding: 2em 0;
}

section {
    padding: 1em 0;
}

article section:last-of-type {
    padding-bottom: 0;
}

.back-to-top {
    font-size: 0.85em;
    text-align: right;
}

footer {
    background: #333;
    color: #fff;
    font-size: .75em;
    padding: .5em;
    text-align: right;
}