.titulos_navegacao{
font-family: Arial;
font-size: 11px;
color: dimgray;
font-weight: bold;
border-left: none;
border-right: none;
border-top: 5px solid #FFFFFF;
border-bottom: none;
background-color: whitesmoke;
width: 98%;
}
.links_titulos{
color: dimgray;
text-decoration: none;
}
.links_titulos:hover{
color: red;
text-decoration: underline;
}