html { 
  margin:10px 40px;
  padding:0;
  background: url(ImageFondWeb1_r_lighter2.jpg) no-repeat center fixed; 
  -webkit-background-size: cover; /* pour anciens Chrome et Safari */
  background-size: cover; /* version standardisée */
  font-family : Arial;
  font-size: 14pt;
  line-height: 22pt;
  color: black
}