body, html {
    margin: 0;
    padding: 0;
}
div.header{
    position: absolute;
    left: 50%;
}
div.header .description{
    position: relative;
    left: -50%;
    border: dotted #000 1px;
    padding: 4px;
    background: #fbfbfb;
}
div.canvas{
    padding: 28px 24px 0 24px;
}
div.footer{
    position: absolute;
    bottom: 0;
}
div.footer .description{
    position: relative;
    border: dotted #000 1px;
    padding: 4px;
    background: #fbfbfb;
}