body {
    width: 100%;
    margin: 0 auto;
}

header {
    background-color: #e97db1;;
    text-align: center;
    padding: 30px 10px;
}


footer {
    background-color: #e97db1;
    width: 100%;
    clear: both;
    text-align: center;

}
.David {
  width: 750px; 
}

.Genially {
  width: 900px; 
  height: 600px;

}

    nav {
        padding: 12px;
        background-color:aqua;
    }


    nav ul{
        list-style-type: none;
        margin: 0;
        padding: 0;
        text-align: center;

    }
    nav li {
        display: inline-block;
        margin: 0 15px;
    }

    main {
        width: 75%;
        float: left;
    }

aside {
    float: right;
    width: 25%;
    background-color: #00d0ff;
}


.saltar{
font-size: 0.0000000000000000001em;
}

.canva{
    width: 400px; 
  height: 600px;
    }