div#page-background{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:100%;
  z-index:-1;
}

img#logo{
  z-index:2;
  display:block;
  margin-left:auto;
  margin-right:auto;
}

div.box{
  margin-bottom:20px;
  padding:30px 15px;
  background:#fff;
  background:rgba(255,255,255,0.9);
}

img#saw{
  bottom:0;
  display:block;
  margin-left:auto;
  margin-right:auto;
}

footer{
}