header {
  text-align: center;
  margin-bottom: 3px;
}

.rule {
  border: 2px solid #333;
  padding: 15px;
  margin: 10px 0;
  border-radius: 10px;
}

.rule h2 {
  border-bottom: 2px dotted black;
  margin: 5px;
}

.rule p {
    margin: 2px 0;
}

.attention{
    color: #ff0000;
}

.small{
    font-size: small;
}

#count{
    padding: 10px;
}