body{
    background:#EEEEEE;
    color:#303030;
    font-family:sans-serif;
}
#contenitore{
    max-width:45rem;
    margin:0 auto;
    text-align:center;
}
input{
    vertical-align:middle;
}
label{
    margin-right:1rem;
}
button{
    margin:0.5rem;
}
#canvas{
    background:#FFFFFF;
    border:0.2rem solid darkgray;
    width:90vw;
    max-width:32rem;
    height:90vw;
    max-height:32rem;
}
