.contenedor {
padding: 15px;
margin: 15px;
margin-left: 120px;
z-index: 1;
  
}
img{
    max-width: 300px;
    
}

.mifondo {
    bottom: 0;
    left: 0;
    width: 100%;
    /* opacity: 0.4; */
    background-image: url('../imagenes/fondo.svg');
    background-repeat: no-repeat;
    height: 100%;
    background-position: center;
    background-size:cover;
    z-index: -1;
}