body {
    background-image: url(/img01/logo_02.png);
    background-size: 100vw 100vh;
}

.contenedor {
    width: 98%;
     margin: auto;
    font-size: 15px;
    color: #fff;
    text-align: center;
    margin-top: 100px;
    background: rgba(0, 0, 0, 0.5)
    
}