body {
    margin: 40px auto;
    max-width: 650px;
    line-height: 1.6;
    font-size: 18px;
    color: #444;
    padding: 0 10px
}

h1,
h2,
h3 {
    line-height: 1.2
}

.header-image{
    float: none;
}

img {
    width: 50%;
    float: right;
    margin: 0 0 10px 10px;
}