html body{
overflow: auto;
width: 100%;
margin: 0;
padding:0;
}

#resul{
font-size: 3em;
margin: 0;
padding: 0;
}

#wrap, #envol{
position: relative;
}
.partes{
float: left;
width: 28%;
}

img{
width: 300px;
}