body {
    background-color: #dadada;
    /*background-image: url('body-bg.png');*/
}

main {
    background-color: #fff;
    padding: 30px 0;
}

.top-nav {
    background-color: #2f2f2f;
}

.top-nav img {
    max-width:130px;
    margin: 15px;
}