.cabecera{
    position: relative;
    clear: both;
    width: 100%;
}

.cabecera_logo{
    position: relative;
    float: left;
    margin: 20px;
}

.cabecera_redes{
    position: relative;
    float: right;
    width: auto; 
    margin: 20px 0px;
}

.cabecera_redes img{
    margin: 5px;
}

.cabecera_titulo{
    position: relative;
    float: right;
    width: 350px; 
    text-align: right;
    margin: 20px 0px;
}