.kanji {
  font-size: 24px;
  font-weight: bold;
  padding: 2px;
}

.grade1 {
  background-color: #ffcccc;
}

.grade2 {
  background-color: #ffcc99;
}

.grade3 {
  background-color: #ffff99;
}

.grade4 {
  background-color: #ccffcc;
}

.grade5 {
  background-color: #99ccff;
}

.grade6 {
  background-color: #bc8f8f;
}

.not-learned {
  background-color: #e6e6e6;
}

.color-sample {
  margin: 3px;
  padding: 3px;
}