.highlighted {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

#highlight-palette button {
  border: none;
  background: none;
  font-size: 1.2em;
  cursor: pointer;
  margin: 0 2px;
}
#highlight-palette {
  background: #fff;
  border: 1px solid #ccc;
  padding: 4px;
  border-radius: 4px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}