#cajacontenedora { background-color: #fff; background-image: url(img/mural-provisional.jpg); background-repeat: no-repeat; background-position: 50% center; width: 800px; height: 475px; margin-top: 0; margin-right: auto; margin-left: auto; }
#logo { background-color: #fff; background-image: url(img/logo.jpg); background-repeat: no-repeat; width: 500px; height: 137px; margin-right: auto; margin-left: auto; }