*{
  padding: 0;
  margin: 0;
}

html{
  margin:0;
  padding:0;
  height: 100%;
  background-image: url(../img/bg.jpg); no-repeat center fixed;
  -webkit-background-size: cover; /* pour anciens Chrome et Safari */
  background-size: cover; /* version standardisée */
}

body{
  padding: 0;
  height: 100%;
}

.inner{
  margin: auto;
  width: 75%;
}