sothr-dot-com/themes/pure/static/assets/css/style.css

nav {
    overflow: hidden;
    padding: 0px 0px;
    background: #131313;
    height: 2.2em;
}

nav ul {
    display: block;
    float: right;
}

nav ul li {
    display: block;
    float: left;
    padding-left: 1em;
}

nav ul li a img {
	padding: .1em;
	width: 2em;
}

nav ul li a img:hover {
    background: #eee;
}