.threadbox {
  border: 10px solid green;
  padding: 10px;
  margin: 10px;
  background-color: white;
}
.commentbox {
  max-width: 90%;
  border: 5px solid green;
  padding: 10px;
  margin: 10px;
  background-color: white;
}
:target, .targeted {
  background-color: #ffa;
}