.sidebar {
    width: 400px;
    height: 180px;
    background-color: #00F;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
    color: #FFF;
    text-transform: uppercase;
}

.sidebar ul li {
    line-height: 25px;
    border-bottom: 1px solid #FFF;
}

.sidebar ul li a {
    text-decoration: none;
    color: #FFF;
    padding: 0 20px;
}

.sidebar ul li a:hover {
    font-weight: bold;
    background-color: #900;
}