h1.logo {
    margin: 0 42px 22px 0;
    width: 160px;
    text-indent: -9999px;
    float: left;
}

a.logo{
    display: block;
    height: 56px;
    background-image: url('../img/logo_usosim.gif');
}

#menu_topo {
    position: relative;
    top: 42px;
}

#menu_topo li {
    float: left;
    margin: 0 10px;
}

#menu_topo li a {
    font-size: 150%;
    padding: 0 5px;
}

#menu_topo li a:hover {
    text-decoration: underline;
}

#menu_topo li a.atual {
    background-color: #FFFFBA;
}