@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700);
body {
  font-family: 'Open Sans', sans-serif;
}
.background {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: 1;
}
.overlay {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: 2;
}