body {
    background-color: #0d1137;
    color: white;
    font-family: serif;
    text-align: center;
    margin: 0;
}
nav {
    padding: 1em;
    border-bottom: 1px solid white;
}
nav a {
    color: white;
    text-decoration: none;
    margin: 0 1em;
    font-size: 1.5em;
}
.content {
    padding: 2em;
}
img {
    max-width: 50%;
    height: auto;
}