.conteiner-principal .conteiner {
    background-color: rgba(255,255,255,0.15);
    box-shadow: 0 3px 05px 0 rgba(0,0,0,0.15);
}
.logo a img {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    max-height: 130%;
}