body {
  max-width: 860px;
  margin: 10px auto;
  position: relative;
}

#current-note-container {
  background: #000;
  color: #fff;
  width: 20px;
  text-align: center;
  font-size: 20px;
  padding: 20px;
  float: left;
  position: absolute;
  left: -65px;
}

table {
  width: 100%;
  border: 1px solid black;
  border-collapse: collapse;
  text-align: center;
}

td {
  border: 1px solid black;
  width: 60px;
}

tr td:nth-child(1) {
  background: black;
  border-bottom: 1px solid #fff;
  color: #fff;
}

td:nth-child(4),
td:nth-child(6),
td:nth-child(8),
td:nth-child(10),
td:nth-child(13) {
  background: rgba(0, 0, 0, 0.15);
}

.align-center {
  text-align: center;
}

.row-heading td {
  background: black;
  border: 1px solid #fff;
  color: #fff;
}

.fret {
  background: yellow;
}

td[data-finger] {
  background: red;
  position: relative;
}
td[data-finger]:after {
  position: absolute;
  top: 0;
  right: 0;
  width: 14px;
  border-radius: 50%;
  padding: 2px;
  text-align: center;
  height: 14px;
  font-size: 10px;
  line-height: 14px;
  background: black;
  color: #fff;
  content: '.';
}

td[data-finger="1"]:after {
  content: '1';
}

td[data-finger="2"]:after {
  content: '2';
}

td[data-finger="3"]:after {
  content: '3';
}

td[data-finger="4"]:after {
  content: '4';
}

tr[data-open="true"] {
  background: rgba(255, 0, 0, 0.5);
}

.scale-table td {
  width: 92px;
  padding: 5px;
}
.scale-table tbody td {
  background: #fff;
  color: #000;
  border-bottom: 1px solid #111;
}