.button1 {
  font-weight: bold;
  margin-bottom: 10px;
}

.button2 {
  font-weight: bold;
}

.table-of-contents.open {
  background-color: #f6f6f6;
}

.btn:not(:disabled):not(.disabled) {
  font-weight: bold;
  border-radius: 0px;
  border-left-width: 30px;
  border-right-width: 30px;
}