.dice-table {
  user-select: none;
  font-family: Arial;
  border-style: solid;
  border-radius: 0.7rem;
  border-width: 0.1rem;
  border-color: rgb(0, 0, 0);
  width: 5rem;
  height: 5rem;
  text-align: center;
  display: inline-table;
  margin: 4px;
  overflow: hidden;
}

.dice-table td {
  font-size: 420%;
  line-height: 0;
}

.tb{
  color: rgba(0, 0, 0, 0);
}

.rb{
  color: rgb(255, 0, 0);
}

body {
  text-align: center;
}

#dice_number{
  font-size: 2rem;
  width: 70px;
  margin: 0px;
}

#sum{
  font-size: 2rem;
  margin: 0px;
}

#roll_btn{
  font-size: 2rem;
  margin: 0;
  user-select: none;
}