#main_menu {
}

#main_menu ul {
    padding: 0px;
    margin: 0px;
    list-style: none;
}

#main_menu li {
    display: inline;
}

#main_menu a {
    float: left;
    width: 100px;
    padding: 4px 7px 8px 7px;
    text-decoration: none;
    color: #616161;
}

#main_menu a:hover {
    background: #ECF1F7;
}