#catalogue-container ul {
    list-style: none;
    display: inline-flex;
    padding-left: 0px;    
    font-size: large;
}

#catalogue-container li.selected {
    background-color: lightgray;
    border-radius: 3px;    
}

#catalogue-container li:hover {
    border-radius: 3px;
    background-color: #f3f3f3;
}

#catalogue-container li a {
    text-decoration: none;
    padding-left: 10px;
    padding-right: 10px;
}