body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: black;
  color: #ccc;
}

#Content {
  width: 1000px;
  margin: 0 auto;
  clear: both
}

#TopViewImage {
  position: absolute;
  width: 1000px;
  height: 100%;
  background-image: url('topview.png');
  background-repeat: no-repeat;
}

#InstrumentInfo {
  display: block;
  font-family: sans-serif;
  text-align: left;
  margin: 10px 0;
}

#InstrumentTitle {
  font-size: 64px;
}

#Hint {
  font-family: sans-serif;
  font-size: 12px;
  border: 10px;
  margin: 10px;
  float: left;
}

#InstrumentNavigation ul {
  padding-bottom: 2em;
  height: 4em;
}

#InstrumentNavigation li {
  float: left;
  margin:0;
  padding:0;
  list-style:none;
  margin:1em;
}

/*---------------------------------------------------------------------------*/

.note_play {
  border: green solid 1px;
  background-color: rgba(0, 255, 0, 0.1);
  position: absolute;
}

.note_stop {
  border: blue solid 1px;
  background-color: rgba(0, 0, 255, 0.1);
  position: absolute;
}

.note_invisible {
  border: 0;
  background-color: transparent;
  position: absolute;
}

.label {
  color: orange;
  font-size: 16pt;
  text-align: center;
  position: absolute;
}

.label_invisible {
  border: 0;
  visibility: hidden;
  position: absolute;
}

.key {
  color: rgba(127, 255, 255, 0.75);
  font-size: 16pt;
  text-align: center;
  vertical-align: bottom;
  position: absolute;
}

.key_invisible {
  border: 0;
  color: transparent;
  position: absolute;
}

/*---------------------------------------------------------------------------*/