ed.brz9.dev/proj/chordboard/css/inter.css

th {
  height: 35px;
  max-height: 35px;
  width: 35px;
  padding: 0px;
  margin: 0px;
}

th img {
  height: 35px;
  max-height: 35px;
  padding: 0px;
  margin: 0px;
}

td.blank, th.blank {
  border: none;
}

td.modeg {
  width: 55px;
}