@-moz-document url-prefix() {
  div {
    margin-top: -1%;
    
    
  }
}

html,
body {
  overflow: hidden;
  background: #fefbf0;
  margin: 0;
  margin-bottom: 0;
  padding: 0;
  box-sizing: content-box;
}

html {
  min-height: 100%;
  background: url(./BG_2400x1260pixel.jpg) center center cover no-repeat fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

img {
  width: 100%;
}