#pagina{
    position: relative;
    z-index: 10000;
    width: 1050px;
    height:400px;
    margin:0px auto;
}

.seccion{
    background-color: rgba(0,0,0,0.7);
    padding: 10px;
    float: left;
    margin: 0px 20px 20px 0px;
}

.titulo-seccion{
    color:white;
    font-weight: bold;
    font-size: 20px;
}

.desarrollo-seccion{
    color: white;
    line-height: 22px;
    margin: 10px 0px 0px 0px;
}