body {
     background-image:url(../../img/portada.jpg);
     background-repeat:no-repeat;
    background-size: cover;
    background-attachment:fixed;
    background-color: rgba(0, 0, 0,.4);
    background-position:center;
    height: 100%;
    width: 100%;
}

.sidenav {
    position: fixed;
    height: 100%;
    overflow-x: hidden;
    background-color: rgba(7, 0, 70, 0.61);
    width: 350px;
    top:0;
    left:0;
    z-index: 1;
    }
.logotipo{
    position:absolute;
    left:20px;
    top:10px;
    color: #FF0000;
    text-align:left;
    font-size:medium;
    width:300px;
    height:150px;
    justify-content:center;
    display:flex;
}
.main {
    position: absolute;
    top:210px;
    background:rgba(7, 0, 70, 0.5);
    left:20px;
    width:300px;
    padding-top:20px;

}
.main p{
    color: rgb(255, 255, 255);
    font-size:14px;
}
.Button
/*.login-form{
    /*margin-top:15px;
        margin-left:30px;
        width:300px;
        font-size:20px;
        /*margin-bottom:10px;
    }*/