html::before {
  content: ' ';
  display: block;
  background-image: url(bg.jpg);
  background-position: center;
  background-size: cover;
  height: 100vh;
  width: 100vw;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  position: fixed;
  z-index: -10; // This is pretty important.
}


body,td,th {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 16px;
	color: #FFFFFF;
}