body {
    margin: 40px 0 100px 0;
}

.nav {
    position: static;
    width: 100%;
    height: 150px;
    margin: 20px 0;
}

.nav-icon {
    width: 150px;
    height: 150px;
    background-image: url("/img/icon-150.png");
    background-image: -webkit-image-set( url("/img/icon-150.png") 1x, url("/img/icon-300.png") 2x );
    background-size: 150px;
}

.nav-title, .nav-author {
    height: 0;
    width: 0;
    visibility: hidden;
    pointer-events: none;
}

.content, .content-separator, .footer {
    width: 80%;
}