main .blog {
    width: 900px;
    
    /*display: flex;
    justify-content: center;*/
    
    background: rgba(255,255,255,.9);
    /*background: rgba(0,82,111,.9);/*petrole*/
    /*background: rgba(44,41,111,.8);/*blue sea*/
    /*background: rgba(0,183,229,.8);/*blue sky*/
    /*background: rgba(85,165,70,.8);/*green sky*/
    /*background: rgba(0,105,62,.8);/*green*/
    /*color: #2c296f;/*azul marino*/
    /*color: #00526f;/*petroel*/
    /*color: #00b7e5;/*celeste*/
    /*color: #55a546;/*verde claro*/
    /*color: #00693e;/*verde*/
}

main .blog p{
    margin: 10px 20px;
    line-height: 1.5em;
    font-size: 19px;
    text-align: justify;
}