.footer {
    border-top: solid 1px #A8A8A8;
    text-align: center;
    padding-top: 5px;
    color: #616161
}
#bandera{
    width:100%;
    margin:0 auto;
    height:0px;
    text-align:center;

}

.centrar3 {
    background-repeat: no-repeat;
    margin: 0 27%;
}