body {text-align: center;}

#title {font-size: 64px;}

#block {
  background-color: lightblue;
  padding: 20px;
  border-radius: 12px;
 
}

#b1 {
  padding: 12px 15px;
  font-size: 20px;
}


#b1:hover:not(.hey) {
  text-decoration: underline;
}