*{margin:0;padding:0;}
body{background:#eae9e3;}
canvas{position:absolute;}
#display{
    position:absolute;
    top:10px;left:10px;
    font:10px/2em sans-serif;
    color:#000;
}
#display input{
    width:95px;
    font:10px sans-serif;
    border:0;
    border-bottom:1px solid rgba(204,204,204,.5);
    background:transparent;
}