body > img {
  padding: 5px;
  display: block;
  margin-left: 30px;
  margin-right: auto;
  margin-top: 30px;
  margin-bottom: 30px;
}

#key_signatures_piano {
  height: 600px;
}

#staff {
  height: 600px;
}

#key_signatures_notation {
  height: 600px;
}

#guitar {
  width: 900px;
}

#pitch_ranges {
  width: 900px;
}

body {
  background-image: url("../images/background_bright.jpeg");
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center;
  background-size: cover;
}