.conteiner-principal .conteiner {
    background-color: #fff;
    box-shadow: none;
}

.redes-sociais {
    width: 220px;
    padding: 0 20px;
    position: absolute;
    top: 0;
    bottom: 0;
    background: url(../img/padrao-rodape.png) #fff;
    box-shadow: 0 3px 7px 0 rgba(0,0,0,0.3);
    height: 300px;
}