cern-summer-webfest/css/structure.css

.chapter-image{
    height: 4em;
    width: 4em;
}

.navigation {
    background: #2C2C2C;
    overflow: hidden;
}

#topbar {
    width:100%;
    position: absolute;
}

#nav-button {
    border-radius: 0px 0px 20px 20px ;
    background:  #2C2C2C;
    margin: 0px;
    padding: 0.5em;
    padding-right: 1em;
    padding-left: 1em;
    margin-right: 5em;
}